Answers
Answer:
There are two kinds of forces, or attractions, that operate in a molecule—intramolecular and intermolecular. Let's try to understand this difference through the following example.
Explanation:
We have six towels—three are purple in color, labeled hydrogen and three are pink in color, labeled chlorine. We are given a sewing needle and black thread to sew one hydrogen towel to one chlorine towel. After sewing, we now have three pairs of towels: hydrogen sewed to chlorine. The next step is to attach these three pairs of towels to each other. For this we use Velcro as shown above.
So, the result of this exercise is that we have six towels attached to each other through thread and Velcro. Now if I ask you to pull this assembly from both ends, what do you think will happen? The Velcro junctions will fall apart while the sewed junctions will stay as is. The attachment created by Velcro is much weaker than the attachment created by the thread that we used to sew the pairs of towels together. A slight force applied to either end of the towels can easily bring apart the Velcro junctions without tearing apart the sewed junctions.
Exactly the same situation exists in molecules. Just imagine the towels to be real atoms, such as hydrogen and chlorine. These two atoms are bound to each other through a polar covalent bond—analogous to the thread. Each hydrogen chloride molecule in turn is bonded to the neighboring hydrogen chloride molecule through a dipole-dipole attraction—analogous to Velcro. We’ll talk about dipole-dipole interactions in detail a bit later. The polar covalent bond is much stronger in strength than the dipole-dipole interaction. The former is termed an intramolecular attraction while the latter is termed an intermolecular attraction.
Related Questions
Ammonia, NH3 , reacts with oxygen to form nitrogen gas and water.
4NH3(aq)+3O2(g)⟶2N2(g)+6H2O(l)
What is the percent yield of the reaction?
Answers
The percent yield of the reaction when 3.85g of Ammonia reacts with 5.78g of O2 to give out 0.750L of nitrogen is 27.43%
It is given that the mass of Ammonia is 3.85g and the mass of Oxygen is 5.78g. The yield of Nitrogen is 0.750L. To find the percent yield, we need to know the number of moles of ammonia and Oxygen.
No of moles of Oxygen = 5.78/31.99
No moles of Oxygen= 0.181 mol of O2.
No. of moles of Ammonia = 3.85/17.03
= 0.226 mol of NH₃
It can be seen that 0.226 mol of NH₃ reacts with 3/4th of 0.226 mol of O₂ which is 0.1695 mol of O₂.
But the given moles of O₂ are more than that of the required value. Therefore, NH₃ is the limiting reactant and O₂ is the excess.
Therefore,
0.226 mol of NH3 x 2 mol of N₂/ 4 mol of NH3
= 0.113 mol of N₂
Experimentally it would be calculated as
n = PV/RT
n = (1 x 0.750)/(0.0821x295)
n = 0.031 mol of N₂
Percent yield = Experimental yield/theoretical yield x 100
Percent yield= (0.031/0.113)x100
Percent yield= 27.43%
Therefore, the percent yield of N₂ is 27.43%
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Why is the time series useful as a management tool?
A) It estimates the probability of extinction.
B) It estimates the harvested numbers.
C) lt monitors a population's age structure.
D) It designates wildlife refuge areas.
Answers
Answer:
A)
Explanation:
It estimates the probability of extinction.
A student adds an alka-seltzer to the Koolaid and stirs. The pH meter now reads 8.3. What was released by the alka-seltzer tablet to cause this change?
Answers
Answer:
It released hydroxide ions (OH ¯).
Explanation:
A PH of 8.3 indicates that the solution has become a basic solution.
Now, for us to have a basic solution from the addition of an alka-seltzer to Koolaid, it means the Alka-seltzer released plenty of hydroxide ons (OH¯) to the solution.
Question 6 (5 points)
Label each situation as metals, nonmetals, or metalloids. Label each with numbers.
Usually conducts electricity
& heat well
at room temperature these
are gases or liquids
Will lose valance electrons
to form compounds.
can be used as
semiconductors
Will gain valance electrons
to form compounds.
1. a metal
2. a nonmetal
3. a metalloid
Answers
Answer:
Explanation:
Here are the labels for each situation:
1.Usually conducts electricity & heat well - Metal (1)
2.At room temperature these are gases or liquids - Nonmetal (2)
3.Will lose valance electrons to form compounds - Metal (1)
4.Can be used as semiconductors - Metalloid (3)
5.Will gain valance electrons to form compounds - Nonmetal (2)
convert 5 moles of water to grams of water
convert 220 J of energy to calories
Answers
The 5 moles of water is equal to 90.075 grams of water and 220 J of energy is equal to 52.636 calories.
To change moles of water to grams, it is required to find the molar mass of the substance. The molar mass of water (H2O) is equal to 18.015 grams/mol.
To change 5 moles of water to grams, by using the following calculation:
5 moles × 18.015 grams/mol = 90.075 grams of water
Thus, 5 moles of water is equal to 90.075 grams of water.
To change joules to calories, by using the conversion factor:
1 cal = 4.184 J.
To change 220 J of energy to calories, by using the following calculation:
220 J × (1 cal / 4.184 J) = 52.636 cal
Thus, 220 J of energy is equal to 52.636 calories.
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Explain how Bohr's model built on the ideas of Einstein and Planck.
Answers
Explanation:
Bohr built on Nicholson's idea by adopting the requirement that the angular momentum can have only certain discrete values related to Planck's constant. However Bohr's atom has many orbits for the electrons.
4) A sample of sodium bromide, NaBr, has a mass percentage of sodium of 22.34%.
a) If the sample of sodium bromide were contaminated with sodium chloride, NaCl, would the mass percentage of Na in the sample be higher or lower than the pure sample? Justify your claim.
b) If the sample of sodium bromide were contaminated with sodium iodide, NaI, would the mass percentage of Na in the sample be higher or lower than the pure sample? Justify your claim
Answers
Explanation:
The trick here is to realize the every sample of sodium bromide, regardless of its mass, will contain
22.34
%
sodium by mass.
This is true because sodium and bromide always combine in definite proportions, i.e. stable ratios by mass, to form sodium bromide.
Now, a
22.34
%
percent concentration by mass means that every
100 g
of sodium bromide will contain
22.34 g
of sodium and
100 g
−
22.34 g
=
77.66 g Br
Therefore, you can say that the mass ratio that exists between sodium and bromine in any sample of sodium bromide will be
22.34 g Na
77.66 g Br
=
22.34
77.66
You can thus use this definite proportion to say that a
5.69 g
sample of sodium bromide will contain
5.69
g NaBr
⋅
22.34 g Na
100
g NaBr
=
1.271 g Na
=
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
∣
∣
a
a
1.27 g Na
a
a
∣
∣
−−−−−−−−−−−−−
The answer is rounded to three sig figs.
You can use the known definite proportion to find the mass of bromide present in the sample
1.271
g NaBr
⋅
77.66 g Br
22.34
g NaBr
=
4.42 g Br
This checks out because
mass of NaBr sample
5.69 g
−
mass of Na
1.27 g
=
mass of Br
4.42 g
The answers to your questions are ;
a) The mass percentage of Na in the sample will be higher in the sample
b) The mass percentage of Na in the sample will be be lower in the sample
Given that:
Mass percentage of sodium contained in sodium Bromide = 22.34%
a) Determine if the mass percentage of Na will be higher or lower when sodium Bromide is contaminated with sodium chloride
mass percentage of Na in sodium bromide
= ( mass of Na / mass of NaBr )*100
The mass of sodium in NaBr and NaCl is the same while the mass of Br is not same ( greater than ) as the mass of Cl. hence when NaBr is contaminated with NaCl the total mass of in percentage NaBr will decrease. and This decrease in mass of NaBr will lead to a decrease/lower mass percentage of Na in the sample
b) When NaBr is contaminated with NaI
The mass of Na is the same in NaBr and NaI while the mass of I is not the same ( greater than ) as the mass of Br, therefore the total mass will increase and the increase in the Total mass in percentage will lead to an increase/higher value of Na in the given sample.
hence the mass percentage of Na will decrease when NaBr is contaminated with NaCl while the mass percentage of Na will increase when NaBr is contaminated with NaI
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How do you find the formula for potassium citrate? I need the steps
Answers
Potassium citrate (also known as tripotassium citrate) is a potassium salt of citric acid with the molecular formula K3C6H5O7.
If you use 1 g of acetanilide in Step 2, what volume (mL) of sulfuric acid must be added to your reaction flask if the concentration of your reaction is 1.5 M (with respect to acetanilide; molecular weight 135.17 g/mol)?
Step 2:
Add H2SO4 and stir GENTLY to dissolve the acetanilide. It is not necessary that the acetanilide dissolve completely. Stir for one or two minutes then proceed to step 3.
Answers
4.933 mL of sulfuric acid needs to be added to have an acetanilide concentration of 1.5 M for the given molarity .
What is molarity ?The molarity of a solution is defined as the total number of moles of solute present per litre. It is also referred to as "molar concentration" and is spelled "molar." It is denoted by the symbol "M," and its unit of measurement is mol/L. A solution is said to have one molarity if one mole of solute dissolves in one litre of solution. The molarity of a solution is determined by its volume but not by the volume of the solvent. Unlike mass, the molarity of a given solution relies on the physical properties of the system, such as pressure and temperature, because the volume of the solution changes as the physical conditions of the system change.
Use formula M₁ × V₁ = M₂ × V₂
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The elements present in a group of periodic table have
Similar chemical properties) Give reason and a
suitable element?
Answers
Answer:
group 1 elements(hydrogen,sodium,etc)
Explanation:
bexause if noticed all the element in the same group have the same eletron in thr outer most shell for example the group 1 elements are said to have 1 outermost elect ron which make them react so the same
Betty and her grandson decided to bake a cake.
They gather eggs, flour, sugar, salt, baking soda, oil,
and vanilla. All of the ingredients are measured and
mixed following Betty's grandmother's recipe. They
bake the cake in the oven for 30 minutes. Did the
ingredients undergo a physical change or chemical
reaction? How do you know?
Answers
Answer: Chemical change
Explanation: Chemical change because when you add baking soda, a chemical reaction is happening. I hope this helps :)
Solid mercury (II) oxide produces liquid mercury and oxygen gas
Answers
Mercury(II) oxide, a red solid, decomposes when heated to produce mercury and oxygen gas. Mercury(II) oxide is a red solid. When it is heated, it decomposes into mercury metal and oxygen gas. A reaction is also considered to be a decomposition reaction even when one or more of the products are still compounds.
2C 2 H 2 (g)+5O 2 (g) CO 2 (g) + 2H 2 O (l)
Answers
Answer:
2c2gh2+5cg2o4+2h2lo
Explanation:
Coulomb's Law yields an expression for the energy of interaction for a pair of point charges.
V=2.31E-19 Q1 Q2 /r (nm)
V is the energy (in J) required to bring the two charges from infinite distance separation to distance r (in nm).
Q1 and Q2 are the charges in terms of electrons.
(i.e. the constant in the above expression is 2.31×10-19 J nm electrons-2)
For a group of "point" charges (e.g. ions) the total energy of interaction is the sum of the interaction energies for the individual pairs.
Calculate the energy of interaction for the linear arrangement of ions shown in the diagram below.
d = 0.400 nm.
Answers
The energy of interaction for the linear arrangement of ions shown in the diagram below is 4.44 * 10⁻⁵⁸ J.
What is the total energy of interaction of the charges shown in the given arrangement?The total energy of interaction is the sum of the interaction energies for the individual pairs of ions.
The energy of interaction of the individual pairs is given below as follows:
V = 2.31 * 10⁻¹⁹ * Q₁ * Q₂ / r
where;
Q₁ = 1.602 * 10⁻¹⁹ coulombs.
Q₂ = 1.602 * 10⁻¹⁹ coulombs
r is the distance in nm
The total energy of interaction of the charges shown in the given arrangement will be 3V.
V = 2.31 * 10⁻¹⁹ * 1.602 * 10⁻¹⁹ * 1.602 * 10⁻¹⁹ / 0.4
V = 1.48 * 10⁻⁵⁸ J
3V = 4.44 * 10⁻⁵⁸ J
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An amateur entomologist captures a particularly excellent ladybug specimen in a plastic jar. The internal volume of the jar is 0.5L, and the air within the jar is initially at 1 atın. The bug-lover is so excited by the catch that he squeezes the jar fervently in his sweaty palm, compressing it such that the final pressure within the jar is 1.25 atm. What is the final volume of the ladybug's prison?
Answers
The final volume of the ladybug's prison is approximately 0.4 liters.
To determine the final volume of the ladybug's prison, we can use Boyle's Law, which states that the pressure and volume of a gas are inversely proportional at constant temperature. The equation for Boyle's Law is:
P1 * V1 = P2 * V2
Where P1 and V1 are the initial pressure and volume, and P2 and V2 are the final pressure and volume, respectively.
In this scenario, the initial volume (V1) is given as 0.5 L, and the initial pressure (P1) is 1 atm. The final pressure (P2) is 1.25 atm. We need to find the final volume (V2).
Plugging the given values into the equation, we have:
1 atm * 0.5 L = 1.25 atm * V2
Simplifying the equation, we find:
0.5 L = 1.25 atm * V2
Dividing both sides of the equation by 1.25 atm, we get:
0.5 L / 1.25 atm = V2
V2 ≈ 0.4 L
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For which of the following reactions is the enthalpy change equal to the second ionization energy of nitrogen?
Answers
Answer:
"\(N^+(g) \rightarrow N^{2+}(g) + e^-\)" is the appropriate answer.
Explanation:
Whenever one electron or particle must be removed from some kind of gas atom or molecule, it requires that the very first amount of energy necessary.Two electrons must be removed from such a mono-positive exhaust gases structure or position of ion before they may become a dipositive gaseous ion.Thus the above is the correct answer.
would He gain stability by adding one H
Answers
Helium gains no stability by adding one H because it is already stable due to a complete valance shell or orbit.
How do elements gain stability?
To attain stability an atom will gain, lose, or share electrons to complete the outermost shell means the last shell. Helium atom has two electrons in the first orbit which completes the doublet rule so it is stable we know that noble gases are stable elements and we know that helium is also a member of a noble family. Nuclides are the most stable because it contains even numbers of both protons and neutrons which make them less radioactive. Nuclear stability is greater in nuclides that comprise even numbers of protons and neutrons or both.
So we can conclude that the helium atom does not need hydrogen to get stability.
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Hydrogen bonds can be found between molecules of which substance?
A) C3H8
B) H2
C) HF
D) CH4
Answers
Answer:
Any molecule which has a hydrogen atom attached directly to an oxygen or a nitrogen is capable of hydrogen bonding. Hydrogen bonds also occur when hydrogen is bonded to fluorine, but the HF group does not appear in other molecules.
So, the HF no. c) is a right answer.
Guysss how to explain nuclear chemistry? And define nuclear chemistry ?
Answers
Answer:
How do amoeba respire.
Define Diffusion.
which is the graph of the function g(x) = f(-x)
Answers
To graph the function g(x) = f(-x), you can start with the graph of f(x) and then reflect it about the y-axis.
What is a graph of the function g(x) = f(-x)?To find the graph of the function g(x) = f(-x), we can start with the graph of the function f(x) and then reflect it about the y-axis.
If the graph of f(x) is symmetric with respect to the y-axis, meaning it is unchanged when reflected, then g(x) = f(-x) will have the same graph as f(x).
However, if the graph of f(x) is not symmetric with respect to the y-axis, then g(x) = f(-x) will be a reflection of f(x) about the y-axis.
In either case, the resulting graph of g(x) = f(-x) will be symmetric with respect to the y-axis.
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How does sickle cell anemia effect homostasis?
What is the possibility sickle cell anemia is passed on?
How many people get this disease? How common is this disease? Who is most likley to get it?
What is the diagnosis for sickle cell anemia?
Answers
Sickle cell anemia is a genetic blood disorder that affects shape and function of red blood cells.
How does sickle cell anemia effect hemostasis?Sickle cell anemia is a genetic blood disorder that affects the shape and function of red blood cells. Hemostasis refers to process of maintaining balance between clotting and bleeding and sickle cell anemia can disrupt this balance in several ways.
One of the main effects of sickle cell anemia on hemostasis is that it can cause Vaso-occlusion, which is blockage of small blood vessels by sickle cells. This can cause tissue damage, inflammation and pain, which in turn can trigger an overactive clotting response.
Sickle cell anemia is caused by mutations in HBB gene, which provides instructions for making protein called hemoglobin.
Sickle cell anemia is most commonly found in people of African descent, although it can also occur in people of Hispanic, Middle Eastern, and Mediterranean ancestry.
Diagnosis of sickle cell anemia involves blood test to look for the presence of sickle hemoglobin.
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I need to solve #5 and #6
Answers
Answer:
hello
Explanation
sup
Help please thank you!!!
Answers
Answer:
I think its J
Explanation:
sorry if im wrong
Iron and Chlorine gas react according to the following balanced equation: 2 Fe(S) + 3 Cl2 (g) 2 FeCl3(s) a) Calculate the molar mass in grams of “one mole” of each of the following: Fe ________ Cl2 __________________ FeCl3 ______________
Answers
The molar mass in grams of "one mole" of each substance is:
Fe: 55.845 g/mol
\(Cl_2\): 70.906 g/mol
\(FeCl_3\): 162.204 g/mol
To calculate the molar mass in grams of "one mole" of each substance, we need to determine the atomic masses of the elements involved in the equation.
The atomic mass of iron (Fe) is 55.845 g/mol.
For chlorine (\(Cl_2\)), we need to consider that the molar mass of \(Cl_2\) is twice the atomic mass of chlorine because the formula shows that two chlorine atoms combine to form one molecule of \(Cl_2\). The atomic mass of chlorine is 35.453 g/mol, so the molar mass of \(Cl_2\) is 2 * 35.453 g/mol = 70.906 g/mol.
The formula for iron(III) chloride (\(FeCl_3\)) indicates that one mole of \(FeCl_3\)contains one mole of iron and three moles of chlorine. Therefore, we can calculate the molar mass of \(FeCl_3\)by summing the atomic masses of iron and chlorine:
Molar mass of \(FeCl_3\)= (1 * atomic mass of Fe) + (3 * atomic mass of Cl)
Substituting the values, we have:
Molar mass of \(FeCl_3\) = (1 * 55.845 g/mol) + (3 * 35.453 g/mol)
= 55.845 g/mol + 106.359 g/mol
= 162.204 g/mol
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Which bone is located between the incus and the inner ear?
cochlea
stapes
incus
malleus
Answers
Answer: The answer is incus
Please I need help thank you
Answers
Answer:
its sodium hydroxide
Explanation:
Bill's recipe for onion soup calls for 4.0 lb of thinly sliced onions . if an onion has an average mass of 115 g , how many onions does Bill need ?
Answers
Answer:
A lot
Explanation:
BillBill's recipe for onion soup calls for 4.0 lb of thinly sliced onions . if an onion has an average mass of 115 g , how many onions does Bill need ?
How many grams of Aluminum Sulfate do you have if you have 2.837x10^26 atoms of Sulfur?
Apparently, the right answer is 5.373x10^4, but I do not know how to get there, please help.
Answers
The mass of Aluminum Sulfate is 5.373 grams if you have \(2.837*10^{26\) atoms of Sulfur .
The molecular formula of Aluminum Sulfate is \(Al_2(SO_4)_3.\) In one molecule of aluminum sulfate, there are 3 sulfur atoms. To calculate the mass of aluminum sulfate, follow the steps below:
Step 1: Calculate the molar mass of aluminum sulfate using the periodic table.Al = 27.0 g/molS = 32.1 g/molO = 16.0 g/mol
(2 × Al) + (3 × S) + (12 × O) = molar mass of \(Al_2(SO_4)_3.\) = 342.2 g/mol
Step 2: Find the number of moles of sulfur in the given number of atoms of sulfur.2\(2.837*10^{26\) atoms of sulfur × 1 mol S/\(6.022 * 10^{23\)atoms S = 0.0470 mol S
Step 3: Use the molar ratio of sulfur to aluminum sulfate to calculate the number of moles of aluminum sulfate.1 mol \(Al_2(SO_4)_3.\) / 3 mol S = 0.333 mol\(Al_2(SO_4)_3.\) per mol S0.0470 mol S × 0.333 mol \(Al_2(SO_4)_3.\)/mol S = 0.0157 mol \(Al_2(SO_4)_3.\)
Step 4: Calculate the mass of aluminum sulfate.0.0157 mol \(Al_2(SO_4)_3.\) × 342.2 g/mol\(Al_2(SO_4)_3.\)= 5.373 g\(Al_2(SO_4)_3.\)
Therefore, the mass of Aluminum Sulfate is 5.373 grams if you have \(2.837*10^{26\) atoms of Sulfur.
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HQ5.40
Homework Answered Due Today, 11:59 PM
The reaction 3H₂(g) + N₂(g) → 2NH3(g) has an enthalpy of reaction of -92.6 kJ/mol. If 1 g of hydrogen and 2 g of nitrogen are
reacted, how much heat is produced (kJ)?
Answers
The amount of heat energy produced when 1 g of hydrogen and 2 g of nitrogen are reacted, is -6.61 KJ
How do i determine the heat energy produced?First, we shall obtain the limiting reactant. Details below:
3H₂ + N₂ -> 2NH₃
Molar mass of N₂ = 28 g/molMass of N₂ from the balanced equation = 1 × 28 = 28 g Molar mass of H₂ = 2 g/molMass of H₂ from the balanced equation = 3 × 2 = 6 gFrom the balanced equation above,
28 g of N₂ reacted with 6 g of H₂
Therefore,
2 g of N₂ will react with = (2 × 6) / 28 = 0.43 g of H₂
We can see that only 0.43 g of H₂ is needed in the reaction.
Thus, the limiting reactant is N₂
Finally, we the amount of heat energy produced. Details below:
3H₂ + N₂ -> 2NH₃ ΔH = -92.6 KJ
Molar mass of N₂ = 28 g/molMass of N₂ from the balanced equation = 1 × 28 = 28 gFrom the balanced equation above,
When 28 grams of N₂ reacted, -92.6 KJ of heat energy were produced.
Therefore,
When 2 grams of N₂ will react to produce = (2 × -92.6) / 28 = -6.61 KJ
Thus the heat energy produced from the reaction is -6.61 KJ
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Which state of matter - solid, liquid, or gas- tends to have unique factors (different from the other two) to consider when discussing solubility
Answers
The state of matter that tends to have unique factors to consider when discussing solubility compared to the other two states (solid and gas) is the liquid state.
Which state has unique factors?Solubility refers to the ability of a substance (solute) to dissolve in a particular solvent to form a homogeneous mixture (solution). Various factors can affect the solubility of a substance, including temperature, pressure, and the nature of the solute and solvent.
In the case of liquids, the unique factor to consider when discussing solubility is often temperature. The solubility of many solid solutes in liquids generally increases with increasing temperature. This is because higher temperatures provide more energy to break the intermolecular forces between solute particles, allowing them to disperse more evenly throughout the solvent.
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