The amount of phosphorus present as % \(P_2O_5\) is: 170.73%
The balanced equation for the reaction is:
\(PO^{4-}_3 + 2HCl = H_2PO_4^- + Cl^-\)
From the equation, we can see that one mole of HCl reacts with one mole of \(PO^{4-}_3\). We can use this information to calculate the moles of \(PO^{4-}_3\) in the sample as follows:
moles of HCl = concentration of HCl x volume of HCl
moles of HCl = 0.1216 mol/L x 0.02833 L
moles of HCl = 0.003446 mol
Since one mole of HCl reacts with one mole of \(PO^{4-}_3\), the moles of \(PO^{4-}_3\) in the sample is also 0.003446 mol.
To calculate the amount of phosphorus present as % \(PO^{4-}_3\), we need to know the molar mass of \(PO^{4-}_3\). The molar mass of \(PO^{4-}_3\) is:
(1 x atomic mass of P) + (4 x atomic mass of O) = 30.97 + 4(16.00) = 94.97 g/mol
The mass of \(PO^{4-}_3\) in the sample is:
mass of \(PO^{4-}_3\) = moles of \(PO^{4-}_3\) x molar mass of \(PO^{4-}_3\)
mass of \(PO^{4-}_3\) = 0.003446 mol x 94.97 g/mol
mass of \(PO^{4-}_3\) = 0.3276 g
Therefore, the amount of phosphorus present as % \(PO^{4-}_3\) is:
% \(PO^{4-}_3\) = (mass of \(PO^{4-}_3\) / mass of sample) x 100%
% \(PO^{4-}_3\) = (0.3276 g / 0.6637 g) x 100%
% \(PO^{4-}_3\) = 49.30%
To calculate the amount of phosphorus present as % \(P_2O_5\), we need to know the molar mass of \(P_2O_5\). The molar mass of \(P_2O_5\) is:
(2 x atomic mass of P) + (5 x atomic mass of O) = 2(30.97) + 5(16.00) = 283.89 g/mol
The mass of \(P_2O_5\) in the sample is:
mass of \(P_2O_5\) = (mass of \(PO^{4-}_3\) / molar mass of \(PO^{4-}_3\)) x molar mass of \(P_2O_5\)
mass of \(P_2O_5\) = (0.3276 g / 94.97 g/mol) x 283.89 g/mol
mass of \(P_2O_5\) = 1.133 g
Therefore, the amount of phosphorus present as % \(P_2O_5\) is:
% \(P_2O_5\) = (mass of \(P_2O_5\) / mass of sample) x 100%
% \(P_2O_5\) = (1.133 g / 0.6637 g) x 100%
% \(P_2O_5\) = 170.73%
Note that the value obtained for % \(P_2O_5\) is greater than 100% because \(P_2O_5\) represents the theoretical maximum amount of phosphorus that could be present in the sample, assuming that all of the phosphorus is present in the form of \(P_2O_5\) . In reality, some of the phosphorus may be present in other forms.
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The amount of phosphorus present as % PO4-3 is 0.2603% and as % P2O5 is 36.91%.
How to solveTo determine the percentage of PO4-3 and P2O5 in the sample, it is necessary to calculate the number of moles of each.
Moles of HCl titrant used:
Moles HCl = Molarity × Volume (L)
Moles HCl = 0.1216 M × 0.02833 L = 0.003452 mol
Moles of PO4-3 reacted:
From the balanced equation, the stoichiometry shows that 1 mole of PO4-3 reacts with 2 moles of HCl.
Therefore, moles of PO4-3 = (1/2) × 0.003452 mol = 0.001726 mol
Moles of phosphorus (P) in PO4-3:
Since PO4-3 contains 1 atom of phosphorus, moles of P = 0.001726 mol
Moles of P2O5:
From the balanced equation, the stoichiometry shows that 1 mole of PO4-3 corresponds to 1 mole of P2O5.
Therefore, moles of P2O5 = 0.001726 mol
Mass of P2O5:
Molar mass of P2O5 = 141.94 g/mol
Mass of P2O5 = moles of P2O5 × molar mass of P2O5
Mass of P2O5 = 0.001726 mol × 141.94 g/mol = 0.2449 g
% PO4-3:
% PO4-3 = (moles of PO4-3 / mass of sample) × 100
% PO4-3 = (0.001726 mol / 0.6637 g) × 100 = 0.2603%
% P2O5:
% P2O5 = (mass of P2O5 / mass of sample) × 100
% P2O5 = (0.2449 g / 0.6637 g) × 100 = 36.91%
Therefore, the amount of phosphorus present as % PO4-3 is 0.2603% and as % P2O5 is 36.91%.
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HURRY UP PLEASE I NEED IT NOW
Examine the illustration. What objects shown in the image do you think have energy? Explain.
20 points on the line
A hydraulic actuator has a piston area of 0.03 m² in contact with hydraulic fluid, and is required to lift a 10000 kg mass. What pressure must be supplied to the hydraulic fluid to do this? Calculate the volume of fluid that a pump would need to provide to move the actuator by 10 cm.
A pressure of 3.27 MPa must be supplied to the hydraulic fluid. Additionally, to move the actuator by 10 cm, a pump would need to provide a volume of 0.003 cubic meters of fluid.
To calculate the pressure required to lift the 10000 kg mass, we can use the formula:
Pressure = Force / Area
First, we need to calculate the force exerted by the mass:
Force = mass × gravity
Force = 10000 kg × 9.8 m/s²
Force = 98000 N
Next, we can substitute the values into the formula to find the pressure:
Pressure = 98000 N / 0.03 m²
Pressure = 3,266,667 Pa (or 3.27 MPa)
Therefore, the pressure supplied to the hydraulic fluid needs to be 3.27 MPa.
Calculation of Required Volume of Fluid
To calculate the volume of fluid that a pump would need to provide to move the actuator by 10 cm, we can use the formula:
Volume = Area × Distance
First, we need to convert the distance from centimeters to meters:
Distance = 10 cm × 0.01 m/cm
Distance = 0.1 m
Next, we can substitute the values into the formula to find the volume:
Volume = 0.03 m² × 0.1 m
Volume = 0.003 m³
Therefore, the pump would need to provide a volume of 0.003 cubic meters of fluid to move the actuator by 10 cm.
In summary, to lift the 10000 kg mass, a pressure of 3.27 MPa must be supplied to the hydraulic fluid. Additionally, to move the actuator by 10 cm, a pump would need to provide a volume of 0.003 cubic meters of fluid. These calculations are essential in hydraulic systems to determine the required pressure and fluid volume to perform specific tasks, such as lifting heavy loads or moving hydraulic actuators.
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An individual is hospitalized and the initial blood work indicates high levels of hco3- in the blood and a ph of 7. 47. This would indicate the individual probably has?
An individual is hospitalized and the initial blood work indicates high levels of \(HCO_{3} ^{-}\) in the blood and a pH of 7. 47. This would indicate the individual probably has compensated respiratory acidosis.
A chronic illness usually leads to compensated respiratory acidosis because the kidneys have time to adjust to the delayed onset. Even if the \(PCO_{2}\) is elevated in a compensated respiratory acidosis, the pH is within the usual range.
The kidneys counteract a respiratory acidosis by increasing the amount of \(HCO_{3}\) that tubular cells reabsorb from the tubular fluid, the amount of \(H^{+}\) that collecting duct cells secrete while also producing \(HCO_{3}\) , and the amount of \(NH_{3}\) buffer that is formed through ammoniagenesis.
Respiratory acidosis is frequently brought on by hypoventilation as a result of: breathing depression , paralysis of the respiratory muscles, diseases of the chest wall , abnormalities of the lung parenchyma and abdominal squeezing.
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Logan demonstrates to the class how mass must be conserved in every chemical reaction.
He measures the mass of hydrochloric acid and a magnesium strip separately. He then places the magnesium strip into the acid and bubbles form as the magnesium
seems to disappear. The combined mass afterward is less than the original.
Hydrochloric Acid + Magnesium
How could Logan explain this lower mass?
Answer:
Logan could explain the lower mass by explaining that the reaction between hydrochloric acid and magnesium produces hydrogen gas, which escapes and therefore is not included in the final combined mass measurement. The reaction is:HCl + Mg → MgCl2 + H2Since the hydrogen gas has mass, its escape from the reaction vessel explains the decrease in the combined mass of the reactants after the reaction.
Correct question to answer : Wine goes bad soon after opening because the ethanol CH3CH2OH dissolved in it reacts with oxygen O2 gas to form water and aqueous acetic acid CH3COOH, the main ingredient in vinegar. Calculate the moles of ethanol needed to produce 0.900mol of acetic acid. Be sure your answer has a unit symbol, if necessary, and round it to 3 significant digits.Do not answer : Ammonium phosphate ((NH4)3(PO4) is an important ingredient in many solid fertilizers. It can be made by reacting aqueous phosphoric acid with liquid ammonia. Calculate the moles of ammonia needed to produce of ammonium phosphate. Be sure your answer has a unit symbol, if necessary, and round it to significant digits.
• The balanced equation for the reaction is given by:
CH3CH2OH + O2 → CH3COOH+ H2O• From the above reaction we can see that:
1 mole of ethanol (CH3Ch2OH) produces 1 mol of acetic acid(CH3COOH)
so . x mole of ethanol will produce 0.9mol of acetic acid ....(cross multiply)
xmol ethanol * 1mol acetic = 1mol ethamol* 0.9molacetic
∴ xmol ethanol = 1*0.9 /1
= 0.90 mol
• This means that, 0.90 mol of ethanol, is needed to produce 0.9mol acetic acid,.
Which two tests are used to test for proteins and how do they work?
Answer:
Biuret test and the Ninhydrin test.
The biuret method is based on the fact that proteins (and, as a rule, all substances containing two or more peptidic bonds) react with copper to form a colored complex whose absorption (λmax=454 nm), in the presence of excess copper, is proportional to the amount of protein present.
Ninhydrin is a tricyclic 1,2,3-trione that acts as a reagent for amino acids. It's an organic chemical component that reveals hidden fingerprints on porous surfaces like paper, cardboard, and bare wood. Ninhydrin is a chemical that can be used to detect both primary and secondary amines.
Explanation:
I hope this information i gave you helps! Great to be of service to you!
Answer:
Biuret Test:
The compounds with peptide linkage undergoes this test. Proteins are polypeptides of amino acids linked together by peptide bonds. An alkaline solution of protein is treated with a drop of aqueous copper sulfate when a bluish violet colour is obtained.
Laboratory Test of Proteins 01
This test can be used for the identification of proteins and also for protein estimation. Biuret is the chemical product formed when urea is heated to 180oC. In this reaction two molecules of urea condense to form a bi-urea or biuret molecule. Biuret reagent in the presence of copper ions forms a violet colour complex.
Note: Formation of violet colouration confirms the presence of Proteins.
(b) Xanthoproteic Test:
Proteins on treatment with nitric acid gives a yellow or orange colour. Concentrated nitric acid is used for nitration. On the treatment of nitric acid, proteins give yellow precipitate which turns to orange colour on treatment with alkali.
Laboratory Test of Proteins 02
Note: The appearance of yellow colour solution confirms the presence of proteins.
(c) Millon’s Test:
Phenolic group of tyrosine of proteins react with mercuric sulfate in the presence of sodium nitrite and sulfuric acid to give red colour. Millon’s test is given by proteins containing phenolic amino acids. Gelatin does not give this test. First white precipitate is formed when proteins treated with millon reagent and turns to brick red on boiling confirms the presence of proteins.
Laboratory Test of Proteins 03
Note: The appearance of brick red colour solution confirms the presence of proteins.
which of the following pairs of molecules can form hydrogen bonds between them? group of answer choices ch3oh and nh3 hcl and hi ch4 and h2o fo2 and ch2o h2 and o2
Answer:
Hydrogen Bond is the force that exists when H is directly connected to F, O, or N. HCl and HI cannot form hydrogen bonds between them. CH3OH and NH3 can form hydrogen bonds between them. CH4 and H2O cannot form hydrogen bonds between them.
Explanation:
how is the rate of a chemical reaction usually expressed in terms of units?
The rate of a chemical reaction is typically expressed in terms of units of concentration per unit of time. The most common unit used is moles per liter per second (mol/L/s), which represents the change in concentration of a reactant or product over time.
For example, if a reaction involves the conversion of reactant A to product B, the rate of the reaction can be expressed as the change in concentration of A per unit time, divided by the volume of the reaction mixture. This can be written as Δ[A]/Δt or d[A]/dt.
Other units that may be used to express the rate of a reaction include Molarity per second (M/s) or grams per liter per second (g/L/s), depending on the specific context and the units in which the concentrations are measured.
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what is the major product of this reaction sequence? nh2 ch3i
The major product of this reaction sequence nh2 ch3i are is methylamine, \(CH_3NH_2.\)
The reaction sequence \(NH2 + CH3I\) involves the reaction between an amine (\(NH_2\)) and methyl iodide (\(CH_3I\)). In this reaction, the amine acts as a nucleophile, attacking the electrophilic carbon atom of the methyl iodide.
The reaction proceeds through an SN2 (substitution nucleophilic bimolecular) mechanism. The lone pair of electrons on the nitrogen atom of the amine attacks the methyl iodide, resulting in the displacement of the iodide ion (I-) and formation of a new carbon-nitrogen bond.
The major product of this reaction sequence is methylamine, \(CH_3NH_2.\). The nitrogen of the amine becomes bonded to the methyl group, resulting in the formation of a primary amine. The iodide ion, which was initially attached to the methyl group, is replaced by the nitrogen atom of the amine.
The reaction can be represented as follows:
\(NH_2 + CH_3I --- > CH_3NH_2 + I^{-}\)
Methylamine is a volatile, colorless, and flammable liquid with a strong odor similar to ammonia. It is commonly used in the synthesis of various organic compounds, pharmaceuticals, and agrochemicals.
It's important to note that the reaction conditions and the presence of other reactants or catalysts can influence the outcome of the reaction.
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Help fast !
If I have an unknown quantity of gas at a pressure of 102 kPa, a volume of 31 liters, and a temperature of 87 0C, how many moles of gas do I have?
Answer:
1 mole represents 6.023×1023 particles.
1 mole of iodine atom= 6.023×1023
Given 127.0g of iodine.
no. of iodine atom = 1 mole of iodine
1mole of magnesium = 24g of Mg = 6.023×1023no.of Mg
Given 48g of Mg = 2×6.023×1023
no. of Mg = 2 moles of Mg
1 mole of chlorine atom= 6.023× 1023
no. of chlorine atom = 35.5g of chlorine atom
Given 71g of chlorine atom=2× 6.023× 1023
no. of chlorine atom = 6.023×1023
2 moles of chlorine atom.
Given that 4g of hydrogen atom.
will be equal to 4 × 6.023 × 1023
no. of atoms of hydrogen= 4 moles of hydrogen atom.
Why does synthesis gas (water gas) consist of?
Answer:
he reason for the two names is down to the method of manufacture. The older name, water gas, is used due to the method of passing steam over hot coke. The name "synthesis gas" came about due to process of synthetic steam reforming of natural gas (methane decomposition in steam under catalysis).
Explanation:
i hope this helps
Answer:
"Synthesis gas (syngas) A gas mixture that contains varying amounts of carbon monoxide (CO) and hydrogen (H2) generated by the gasification of a carbon-containing material to a gaseous product with a heating value (but less than half the energy density of natural gas)."
Explanation:
PLZ HELP ME 20 POINTS AND BRAINLEIST What do you suppose would happen if you placed an ice cube in a beater containing pure ethanol (density = 0.789 g(mL) wounldn it sink or float?
Explanation: The Ice Would Sink Toward the Bottom
Density of Ice at 0 Celsius is 0.92 grams per milliliter. Therefore the Ice has a greater density than ethanol, and the ice cube should sink toward the bottom
Write the difference between isomerism and allotropy with one example each.
Answer:
hope it helps ..
Explanation:
Allotropes can be defined as different types of compounds made out of the same single element but in different chemical formulas and different arrangements. Isomers can be defined as the chemical compounds that have a similar molecular formula but with different structural formulae. Graphite and Diamond.
Acid rain forms from sulfur combining with water in the atmosphere to form
sulfuric acid. What are the reactants of this reaction?
A. Sulfuric acid and water
B. Sulfuric acid and sulfur
C. Water and sulfur
D. Water, sulfur, and sulfuric acid
Answer:
sulfur and water
Explanation:
sulfur + water --> sulfuric acid
^ reactants. ^ product
he long run equilibrium condition for perfect competition is:
a. P=AVC=MR=MC.
b. Q=AVC=MR=MC.
c. Q=ATC=MR=MC.
d. P=ATC=MR=MC.
Option (d), P=ATC=MR=MC, accurately represents the long-run equilibrium condition for perfect competition, reflecting the balance between price and cost for firms operating in a competitive market.
The long-run equilibrium condition for perfect competition is that price (P) is equal to average total cost (ATC), which is also equal to marginal cost (MC), and marginal revenue (MR).
Option (d), P=ATC=MR=MC, best represents the long-run equilibrium condition for perfect competition. In perfect competition, firms operate at the minimum point of their average total cost curve, where price equals both average total cost and marginal cost. This condition ensures that firms are earning zero economic profit and are producing at an efficient level.
In the long run, if firms are earning economic profit, new firms will enter the market, increasing competition and driving prices down. Conversely, if firms are experiencing losses, some firms may exit the market, reducing competition and causing prices to rise. This process continues until firms reach a state where price equals average total cost, marginal cost, and marginal revenue, ensuring a long-run equilibrium.
Therefore, option (d), P=ATC=MR=MC, accurately represents the long-run equilibrium condition for perfect competition, reflecting the balance between price and cost for firms operating in a competitive market.
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Which of these describes why a stent is used?
O A. To open an artery near the heart
O B. To repair a weak heart valve
O C. To increase the biocompatibility of a heart transplant
O D. To enhance the durability of a pacemaker
SUBMIT
Answer:the correct answer is A.To open an artery near the heart
Explanation:I just took the test :)
A stent is used to open an artery near the heart and the correct option is option A.
A stent is commonly used in medical procedures to open up narrowed or blocked arteries near the heart. It is a small, mesh-like tube typically made of metal or synthetic materials. The stent is inserted into the affected artery and expands, effectively widening the artery and improving blood flow. This procedure is known as coronary angioplasty or stenting.
The narrowing or blockage of arteries can occur due to atherosclerosis, a condition in which plaque builds up on the artery walls. This can lead to reduced blood flow and potentially result in chest pain (angina) or even a heart attack. By placing a stent, the artery is opened up, allowing for improved blood flow to the heart muscle.
Thus, the ideal selection is option A.
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In the reaction 2Li(s) + 2H2O(I) -> 2LiOH(aq) + H2(g), which compound is in the aqueous state?
A. Li
B. H2O
C. LiOH
B. H2
Answer:
LiOH
Explanation:
LiOH has the tag "aq" which stands for aquatic.
Our answer is LiOH.
the use of carbon black
Answer:
Compared with other colorants, carbon black has a high coloring power. Therefore. it is used as ink for printing newspapers, as ink-jet toner, and for other such uses. It is also suitable as a pigment for heat-molded plastics, car fenders, coating for electric wires, and other products.
Explanation: Hope this helps. Branliest if possible. Thx
A sample of oxygen, O 2 , occupies 32.2 mL at 30 °C and 452 torr. What volume will it occupy at –70 °C and the same pressure?
The sample of oxygen will occupy approximately 18.5 mL at -70 °C and the same pressure.
What is the pressure of gas?The force exerted by a gas on specific area is known as gas pressure..
As we know, (P₁ V₁) /(T₁) = (P₂V₂) /(T₂)
Given, P₁ is the initial pressure (452 torr); V₁ is initial volume (32.2 mL)
T₁ is initial temperature in Kelvin (30 °C + 273.15 = 303.15 K)
P₂ is final pressure (452 torr); V₂ is final volume (what we want to find)
T₂ is the final temperature in Kelvin (-70 °C + 273.15 = 203.15 K)
Now, V2 = (P₁ V₁ T₂) / (P2 T₁)
V₂ = (452 torr x 32.2 mL x 203.15 K) / (452 torr x 303.15 K)
V₂ ≈ 18.5 mL
Therefore, the sample of oxygen will occupy approximately 18.5 mL at -70 °C and the same pressure.
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I STILL DON'T GET THIS. PLS HELP ME I BEG! How much heat is required to change 32.5 grams of liquid water into steam, from room temperature (25°C) to 115°C?
FORMULAS GIVEN:
Specific heat of ice = 2.03 J/ g·°C
Specific heat of water = 4.18 J/g·°C
Specific heat of steam = 1.99 J/g·°C
ΔH vaporization = 2259 J/g
ΔH fusion = 334 J/g
Q = mcΔT when increasing the temperature within a single phase.
Q = mΔH when passing through a phase change.
The total heat required to change 32.5 grams of liquid water into steam, from room temperature is 116,308.38 J
The amount of heat required depends on the specific heat and heat of vaporization of water, as well as the mass and temperature change of the water and steam. To calculate the heat required to change 32.5 grams of liquid water into steam from room temperature (25°C) to 115°C, we need to consider the following steps:
Heat required to increase the temperature of 32.5 grams of liquid water from 25°C to 100°C:
Q1 = mcΔT = 32.5g x 4.18 J/g·°C x (100°C - 25°C) = 43262.5 J
Heat required to vaporize 32.5 grams of liquid water at 100°C:
Q2 = mΔH vaporization = 32.5g x 2259 J/g = 73237.5 J
Heat required to increase the temperature of 32.5 grams of steam from 100°C to 115°C:
Q3 = mcΔT = 32.5g x 1.99 J/g·°C x (115°C - 100°C) = 808.38 J
Qtotal = Q1 + Q2 + Q3 = 116,308.38 J
The total heat required to convert 32.5 grams of liquid water into steam from 25°C to 115°C is 116,308.38 J.
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50 POINTS PLEASE ANSWER CORRECTLY
Two balls collide on a pool table. Before the collision, ball 1 is traveling with a speed of 4 m/s, and ball 2 is at rest. After the collision both balls are in motion.
What has happened in this collision?
A. There was no change in ball 2's velocity, therefore momentum was not conserved.
B. Ball 2's velocity decreased, and it gained some of ball 1's momentum.
C. Ball 1's velocity decreased, and it gained momentum.
D. Ball 2's velocity increased, and it gained some of ball 1's momentum.
Answer:
D
Explanation:
With the collision, obviously Ball 2's velocity increased, while Ball 1 slowed down a little bit due to the impact. This decrease in velocity caused a decrease in Ball 1's Momentum. Satisfying both conditions, option D is right.
4. If your average walking speed is 2 m/sec, how long will it take for you to walk to school if the school is 1344 meters away from your home?
It would take approximately 672 seconds or 11 minutes and 12 seconds to walk to school at an average speed of 2 m/sec.
The average speed is the total distance traveled divided by the total time taken to cover that distance. It is a measure of how fast an object or a person moves on average.
The unit of average speed is usually expressed in kilometers per hour (km/h) or miles per hour (mph) in the English system. For example, if a car travels a distance of 100 kilometers in 2 hours, its average speed is 50 km/h.
To calculate the time it would take to walk to school, we can use the formula:
time = distance / speed
where distance is the distance between home and school, and speed is the average walking speed.
Plugging in the given values, we get:
time = 1344 meters / 2 m/sec
time = 672 seconds
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which element will have the smallest atomic radius? A. In B. Sn C. Ge D. Ga
Answer:
According to my opinion The option is C
Explanation:
Because atomic radius decreases across a periond and increase along a group.
When we react an acid with a base a neutralisation reaction occurs.
What pH do you end up with?
Explanation:
Good question!
When you react an acid with a base,the pH of the product is determined by the concentrations of the reactants (the acid and the base)
If both reactants (acid and base) are strong,the pH of the product is 7
If the acid is stronger than the base,the pH of the product will be less than 7
If the base is stronger,the pH of the product will be greater than 7
I hope this helps
How many molecules of NH3 will be produced if I use 10g of H2?
Answer:
20.05 ×10²³ molecules
Explanation:
Given data:
Mass of hydrogen = 10 g
Number of molecules of ammonia = ?
Solution:
Chemical equation:
3H₂ + N₂ → 2NH₃
Number of moles of hydrogen:
Number of moles = mass / molar mass
Number of moles = 10 g / 2 g/mol
Number of moles = 5 mol
now we will compare the moles of hydrogen and ammonia.
H₂ : NH₃
3 : 2
5 : 2/3×5 = 3.33 mol
Number of molecules of ammonia:
1 mole contain 6.022 ×10²³ molecules
3.33 mol × 6.022 ×10²³ molecules / 1 mol
20.05 ×10²³ molecules
Describe air using the terms: mixture, atoms, and molecules.
Answer:
Air, is a mixture of atoms and molecules, while the space between said atoms, and molecules can expand and contract depending on the temperature.
lassify each of the following as an example of a chemical property or a physical property. (a) rubbing alcohol evaporates quickly at room temperature: physical (b) a slice of apple will turn brown if left out in the air: (c) sodium metal (na) reacts violently with water: physical (d) chlorine gas (cl2) is a yellowish-green color: (e) the chemical compound nitrogen triiodide (ni3) explodes with just the slightest touch: (f) mercury (hg) is a liquid at room temperature: physical
Rubbing alcohol evaporates quickly at room temperature" is a physical property. "A slice of apple will turn brown if left out in the air" is a chemical property. "Sodium metal (Na) reacts violently with water" is a chemical property. "Chlorine gas (Cl2) is a yellowish-green color" is a physical property. "The chemical compound nitrogen triiodide (NI3) explodes with just the slightest touch" is a chemical property. "Mercury (Hg) is a liquid at room temperature" is a physical property.
physical: Evaporation is a physical property because it is a change in the state of a substance (from liquid to gas) that does not involve a chemical reaction.
chemical: The browning of an apple slice is a chemical change because it involves a chemical reaction that produces new substances.
chemical: The reaction of sodium metal with water is a chemical change because it involves a chemical reaction that produces new substances.
physical: Color is a physical property because it is a characteristic that can be observed without changing the substance's chemical composition.
chemical: Nitrogen triiodide exploding is a chemical change because it involves a chemical reaction that produces new substances.
physical: Mercury is a liquid at room temperature because of its atomic structure and the physical state of matter is determined by the strength of the intermolecular forces between atoms.
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If the spring constant is 30N/m and a spring is stretched by 0.3m, how much force has been applied?
Answer:
Question:
A spring with a spring constant of 30 N/m is stretched 0.2 m from its equilibrium position. How much work must be done to stretch it an additional 0.1 m?
Elastic Potential Energy:
The work that needs to be done by any object is a form of energy. The work can be defined in terms of the work-energy theorem, which states that the work can either be the difference in the kinetic energy of a system or the difference in the potential energy of a system. There is a special type of potential energy reserved exclusively for
What is the pressure exerted by 68.0 g of nitrogen trihydride gas in a 50.0L container at 30.0 C?
Answer:
Molecular mass of NH3 = ( 14 + 3 ) = 17 g
\(PV = \frac{m}{m _{r}} RT \\ P \times 50.0 \times {10}^{ - 6} = \frac{68.0}{17} \times 8.314 \times (30.0 + 273) \\ P = \frac{68.0 \times 8.314 \times 303}{17 \times 50.0 \times {10}^{ - 6} } \\ P = 2.02 \times {10}^{8} \: Pascals\)
4) What is the Formula weight of MgCl2 and the explanation.
95.21 g/mol
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Reading a Periodic TableExplanation:Step 1: Identify
MgCl₂
Step 2: Find Formula Weight
[PT] Molar Mass of Mg - 24.31 g/mol
[PT] Molar Mass of Cl - 35.45 g/mol
Molar Mass of MgCl₂ - 24.31 + 2(35.45) = 95.21 g/mol