calculate the concentration and 50.0ml of hcl if 18.3 ml of standardized 0.00100 m naoh is used in a neutralization reaction

Explanation:

asexual reproduction involves 1 parent and produces offspring that are genetically identical to each other and parent.

Sexual reproduction involves 2 parents and produces offspring that are genetically unique.

The mass of the salt that should be added is 233.8 g.

First let's replace the data given in the formula for the colligative property of freezing point depression.

0°C - (-12°C) = 12°C /m . m . 2

i = 2, as we assumed complete dissociation of the solute, NaCl

NaCl →  Na⁺  + Cl⁻    :i = 2

i = Van't Hoff factor, defined as the total number of ions dissolved in solution

Now let's find out the m (molality) .

You need the mass of solvent,

By molality and the mass of solvent, you can determine the moles of solute. Therefore, you can know its mass

1g/mL = Solvent mass / Solvent volume

1 g/mL . 1240 mL = 1240 g

12°C / 1.86 m/°C . 2 = m → 3.22 mol/kg

In 1kg of solvent you have 3.22 moles of solute

Your mass of solvent is 1240 g → 1240 g . 1kg/1000 g = 1.24kg

Molality = Mol/kg → Molality . kg = Mol

3.22 mol/kg × 1.24 kg = 4 moles

Finally, let's convert the moles to mass,

4 mol × 58.45 g /1mol = 233.8 g

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Answer:

2.67M

Explanation:

Given: volume of solution = 750.0 mL = 0.750 L Find: molarity

mass of solute = 117 g NaCl

= 58.4428 g/mol (Periodic Table)

Plan: Find the number of moles of solute from the molar mass, then calculate molarity.

Step 1: Find moles of NaCl.

Step 2: Calculate molarity.

Answer: 2.67 M

Strontium Sulfide has the chemical formula of SrS with a molar mass of 119.68 g/mol and a mole of 0.0176 mol

Recall that:

Molar mass (M) = sum of the atomic mass of all the constituting elements

For Strontium Sulfide (SrS):

M(SrS) = atomic mass of Sr + atomic mass of S

M(SrS) = 87.62 g/mol + 32.06 g/mol

M(SrS) = 119.68 g/mol

To find the number of moles in 2.11 g of SrS, we apply the formula:

mole (n) = mass (m) /molar mass (M)

n = m/M

n = 2.11 g / 119.68 g/mol

n = 0.0176 mol

For Phosphorus trifluoride (PF3):

M(PF3) = atomic mass of P + 3 x atomic mass of F

M(PF3) = 30.97 g/mol + 3 x 18.99 g/mol

M(PF3) = 87.97 g/mol

n = m/M

n = 2.11 g / 87.97 g/mol

n = 0.024 mol

For Zinc acetate (Zn(CH3COO)2):

M(Zn(CH3COO)2) = atomic mass of Zn + 2 x (atomic mass of C + 3 x atomic mass of H + atomic mass of O)

M(Zn(CH3COO)2) = 65.38 g/mol + 2 x (12.01 g/mol + 3 x 1.01 g/mol + 16.00 g/mol)

M(Zn(CH3COO)2) = 183.49 g/mol

n = m/M

n = 2.11 g / 183.49 g/mol

n = 0.0115 mol

For Mercury(II) bromate (Hg(BrO3)2):

M(Hg(BrO3)2) = atomic mass of Hg + 2 x atomic mass of Br + 6 x atomic mass of O

M(Hg(BrO3)2) = 200.59 g/mol + 2 x 79.90 g/mol + 6 x 16.00 g/mol

M(Hg(BrO3)2) = 569.19 g/mol

n = m/M

n = 2.11 g / 569.19 g/mol

n = 0.00370 mol

Follow the same steps to calculate for Calcium Nitrate.

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The Molarity of volumetric flask 1 : 1.26 M

The Molarity of volumetric flask 2 : 0.06 M

Dilution is a process of decreasing the concentration of a solution by adding a number of solvents

Can be formulated

M₁V₁=M₂V₂

M₁ = Initial Molarity

V₁ = Initial volume

M₂ = Final Molarity (after dilution)

V₂ = Final volume (after dilution)

Volume of volumetric flask = 500 ml

\(\tt M_1.V_1=M_2V_2\\\\9\times 0.07=M_2.0.5\rightarrow M_2=1.26\)

\(\tt M_1.V_1=M_2V_2\\\\1.26\times 0.023=M_2\times 0.5\rightarrow M_2=0.06\)

When the pressure (P) and temperature (T) are constant, the volume (V) constituting an ideal gas (n) directly varies with the amount of moles constituting the gas (n).

A measurement of three-dimensional space is volume. It is frequently expressed quantitatively using SI-derived units, like the cubic metre or litre, or different imperial or US-standard units, including the gallon, quart and cubic inch. Volume and length (cubed) have a symbiotic relationship.

The volume of an item is typically thought of as its capacity, not as the amount of space it takes up. In other words, the volume is the quantity of fluid (liquid or gas) that the container may hold. When the pressure (P) and temperature (T) are constant, the volume (V) constituting an ideal gas (n) directly varies with the amount of moles constituting the gas (n).

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In order to accurately measure the absorbance of a sample, it is important that the cuvettes containing the glucose oxidase and the blood sample have identical optical properties. This is because the optical properties of the cuvettes will affect the amount of light that is transmitted through the sample.

If the optical properties of the cuvettes are not identical, then the amount of light that is transmitted through the sample will vary and the absorbance measurement will not be accurate.

Optical properties such as the cuvettes’ refractive index, optical clarity, and surface finish all affect the amount of light that is transmitted through the sample. The refractive index affects the amount of light that is bent or refracted as it passes through the cuvette, while the optical clarity affects the amount of light that is scattered as it passes through the cuvette. The surface finish of the cuvette affects the amount of light that is reflected off of the surface of the cuvette.

If the cuvettes containing the glucose oxidase and the blood sample have different optical properties, then the amount of light that is transmitted through the sample will vary and the absorbance measurement will not be accurate.

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Answer:

Explanation:

The bonding capacity of an atom is determined by the electrons. For example, atoms that in their normal state have one electron are hydrogen atoms and will readily (and sometimes violently) bond with oxygen.

The theoretical yield of NaBr given that 2.36 moles of FeBr₃ reacts is 7.08 moles

2FeBr₃ + 3Na₂S → Fе₂S₃ + 6NaBr

From the balanced equation above,

2 moles FeBr₃ reacted to produce 6 moles of NaBr

From the balanced equation above,

2 moles FeBr₃ reacted to produce 6 moles of NaBr

Therefore,

2.36 moles FeBr₃ will react to produce = (2.36 × 6) / 2 = 7.08 moles of NaBr

Therefore,

Thus, the theoretical yield of NaBr is 7.08 moles

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Answer:

7.08

Explanation:

Answer:

\({ \rm{Pb_{3}( PO_{3})_{2} + 3K_{2}CO _{3} →2 K_{3} PO_{3} + 3PbCO_{3}}}\)

Nitrogen is one of the major elements that are cycled in nature. The major sink for nitrogen in nature is the atmosphere.

Biogeochemical cycles in nature show the diverse ways that elements move through the various spheres on earth.

Nitrogen is trapped from the atmosphere by nitrogen- fixing bacteria that live in the root noodles of leguminous plants which convert atmospheric nitrogen to nitrates. This nitrogen is transferred to living organisms when they eat those plants and become incorporated into biomass.

Decomposition returns this nitrogen in biomass to the soil. The action of denitrifying bacteria converts nitrates in soil back to atmospheric nitrogen. Also several anthropogenic sources release nitrogen into the atmosphere as NOx.

The atmosphere consists of 78% nitrogen hence it serves as the largest sink for nitrogen in nature.

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The mass of benzene required to produce 3.50 L of carbon dioxide gas, CO₂ at STP in the reaction is 2.028 grams

First, we shall obtain the mole of carbon dioxide gas, CO₂ produced at STP. Details below:

At STP,

22.4 Liters = 1 mole of CO₂

Therefore,

3.5 liters = 3.5 / 22.4

3.5 liters = 0.156 mole of CO₂

Next, we shall obtain the mole of benzene, C₆H₆ required. Details below:

2C₆H₆ + 15O₂  -> 12CO₂ + 6H₂O

From the balanced equation above,

12 moles of CO₂ were obtained from 2 moles of C₆H₆

Therefore,

0.156 mole of CO₂ will be obtain from = (0.156 × 2) / 12 = 0.026 mole of C₆H₆

Finally, we shall obtain the mass of benzene, C₆H₆ required for the reaction. Details below:

Mass = Mole × molar mass

Mass of C₆H₆ = 0.026 × 78

Mass of C₆H₆ = 2.028 grams

Thus, the mass of benzene, C₆H₆ required is 2.028 grams

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Answer:

it pulls

Explanation:

it pulls because of the magnetic force

Answer: It is pulled

Explanation:

Deeming that the force of motion is attraction, the only way it could be moving would be in pull of the magnet.

Answer:

they have same atomic number as they are the same element & electrons

Answer: they both have the atomic (proton number) as they are the same element hence they also they have the same number of electrons. Therefore they have similar chemical properties, as the electrons determine the chemical property of an element.

Explanation: The numbers 35 and 37 are the mass numbers for the two isotopes of chlorine. They both have the same atomic number (proton number ) as they are the same

I'm not sure, i had this same question, and it doesn't make any logical sense because

A centimeter is a centimeter but in the video apparently not... for example in the video it showed the notebook as 40cm for one and the next one shows it as 14.4 cm it stayed as cm both times the size of the ruler should not change that one ruler was by 10cm the other was by 1 cm and it showed 2 completely different numbers

so therefore it doesn't make any logical sense

here was my measurements from the little video it had

try getting ahold of the teacher or whoever gave you the question its all you really can do...

hope this helped somewhat even through it probably didn't...

Dams and reservoirs can provide reliable water storage but have potential environmental impacts such as habitat loss and disruption of natural flow.

Sedimentation can reduce the storage capacity of reservoirs over time, requiring periodic dredging or desilting to maintain efficiency. Evaporation can lead to water loss from the reservoir, particularly in arid or semi-arid regions with high evaporation rates. These factors need to be carefully managed to ensure the long-term sustainability and efficiency of water storage.

Sedimentation and evaporation are important considerations that need to be managed. Social and economic impacts should also be assessed. Alternative approaches and improved water management practices can enhance sustainability and efficiency. Careful planning, impact assessments, stakeholder engagement, and monitoring are crucial for mitigating negative impacts and maximizing benefits.

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Answer

b. It produces carbon dioxide when burned in pure oxygen.

Explanation

The reaction between diamond and oxygen, producing carbon dioxide is not a physical property of diamond, it is a chemical property because breaking and synthesis of chemical bonds occur.

The reaction time needed to achieve 95% conversion of the limiting reactant is approximately 46.05 seconds.

To find the reaction time needed to achieve 95% conversion of the limiting reactant in an isothermal continuously stirred batch reactor, we need to use the first order rate equation:

ln(C₀/C) = kt

Where:
- C₀ is the initial concentration of the reactant
- C is the concentration of the reactant at a given time t
- k is the rate constant of the reaction
- t is the reaction time

In this case, the reaction is first order in both reactants, A and B. So, we need to consider the reactant with the lowest initial concentration as the limiting reactant.

Given:
Initial concentration of A (C₀,A) = 80 mol/L
Initial concentration of B (C₀,B) = 80 mol/L

Since both A and B are present in equal amounts initially, we can consider either A or B as the limiting reactant. Let's assume A is the limiting reactant.

To achieve 95% conversion of A, we need to find the concentration of A at that point, which is (5/100) times the initial concentration of A:
C = (5/100) * C₀,A

Now, substituting the values in the first order rate equation, we get:
ln(C₀,A/C) = k * t

Rearranging the equation, we have:
t = ln(C₀,A/C) / k

Substituting the values given in the problem:
C₀,A = 80 mol/L
C = (5/100) * C₀,A = (5/100) * 80 mol/L = 4 mol/L
k = 1E-3 L/mol/s

Calculating the reaction time:
t = ln(80/4) / (1E-3)

Simplifying the expression:
t = ln(20) / (1E-3)

Using a calculator, we find:
t ≈ 46.05 s

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The pH of the titration of a 40.0 ml of 0.183 m weak acid ha (ka = 2.7 x 10⁻⁸) with 0.100 m LiOH before any base has been added is 3.89.

To determine the pH of the solution before any base has been added, we need to use the Ka expression for the weak acid HA.

Ka = [H⁺][A⁻]/[HA]

Assuming that the initial concentration of HA is 0.183 M and the acid dissociates completely, we can write the following expression:

Ka = x² / (0.183 - x)

where x is the concentration of H+ ions at equilibrium. Since the acid is weak, we can assume that x is much smaller than 0.183 M, and therefore we can simplify the equation to:

Ka ≈ x² / 0.183

Rearranging the equation to solve for x, we get:

x = √(Ka × [HA])

Substituting the given values, we get:

x = √(2.7 x 10⁻⁸ × 0.183) ≈ 1.3 × 10⁻⁴ M

Now we can use the equation for pH:

pH = -log[H⁺]

pH = -log(1.3 x 10⁻⁴)

≈ 3.89

Therefore, the pH of the solution before any base has been added is approximately 3.89.

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Answer: 185 grams

Explanation: First find out how many grams are in one mol: The molar mass es are taken from the periodic table, Ca is 40, O is 16, H is 1. There are 2 O and 2 H for (OH)2: 40+32+2= 74g/mol x 2.5 mol = 185 the moles cancel and you are left with grams

Answer:

Galena

Explanation:

Galena is also known as lead glance. This is a natural mineral of the form lead(II) sulfide. It is one of the most important ore for lead. It is widely found and is mainly distributed in sulfide minerals.

Galena can be easily scratched by finger nails. It has black streak and have a metallic luster. Galena have cleavage. It usually occurs as cubic crystals.

The mass in grams for each compound at STP is as follows:

To find the mass of a gas at STP (Standard Temperature and Pressure), we can use the ideal gas law, which states:

PV = nRT

Where P is pressure (usually 1 atm at STP), V is volume, n is the number of moles, R is the ideal gas constant (0.0821 L·atm/(mol·K)), and T is the temperature (usually 273 K at STP).

By rearranging the equation and plugging in the given values for pressure (1 atm) and temperature (273 K), we can solve for the number of moles. Then, using the molar mass of each gas, we multiply the number of moles by the molar mass to obtain the mass in grams. The molar mass of H₂ is approximately 2 g/mol, CO₂ is 44 g/mol, SO₂ is 64 g/mol, and F₂ is 38 g/mol.

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Answer:

m = 17

Explanation:

From the question we were given that

Triangle WZY is bisected by ZX; ZW = ZY

∠YXZ = (6m – 12)°

Based on the characteristics of the triangle, we see that triangle WYZ is an isosceles triangle (that is, triangle WXZ is equal to triangle YXZ)

<YXZ = <WXZ = 90°

Using ∠YXZ  = (6m – 12)°

We have:

(6m – 12)° =  90°

6m = 90 + 12 ⇒ 6m = 102

m = 102 ÷ 6 = 17

m = 17

We therefore see that m is equal to 17

Answer:

B: 17

Explanation:

Answer:

A

Explanation:

Hopefully this helps

Answer:

A copy of DNA is made from existing DNA.

Explanation:

Just did the quiz

Answer:

Explanation:

Here, we want to select the most important information piece to determine saturation

The best way to check for this is to check the kind of bonds between the carbon atoms in the molecule

When there are double or triple covalent bonds between the carbon atoms, then, we can be sure that there is a degree of unsaturation (alkenes, alkynes)

If we have single bonds only, then the molecule is saturated

Carbon dioxide molecules can absorb and emit infrared radiation, and they are one of the most abundant constituents of Earth's atmosphere.

Thus, the correct options are:d) Are one of the most abundant constituents of Earth's atmospheree) Can move in many ways, thus absorbing and emitting infrared radiation

Carbon dioxide is a trace gas present in the Earth's atmosphere. It's a vital component of Earth's carbon cycle, which helps to regulate Earth's temperature and support life as we know it. Carbon dioxide molecules are one of the most common gases in the atmosphere, accounting for around 0.04% of the Earth's atmosphere.

The greenhouse effect is caused by carbon dioxide, methane, and other greenhouse gases. When the Sun's energy reaches the Earth's surface, it is absorbed and then radiated back into space as infrared radiation. Greenhouse gases absorb this radiation and trap it in the atmosphere, which causes the Earth's temperature to rise and the climate to change.

Carbon dioxide molecules are capable of absorbing and emitting infrared radiation due to their molecular structure, which consists of one carbon atom and two oxygen atoms. This property of carbon dioxide is the main reason it's classified as a greenhouse gas.

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