2. Calculate the mass, in grams, for 3.47 moles of each of the following:
a. lead(II) acetate
b. sodium chloride

Answers

Answer 1

Explanation:

1 moles Lead(II) Acetate to grams = 325.28804 grams

3.47 moles Lead(II) Acetate to grams = 325.28804 ×3.47 grams=1128.749 grams

1 moles sodium chloride to grams=58.5 grams

3.47 moles sodium chloride to grams=58.5×3.47 grams

=202.995 grams


Related Questions

Which of these statements are true? Select all that apply.

The Delta.Hf for Br2(I) is 0 kJ/mol.

The Delta.Hf for He(I) is 0 kJ/mol.

The Delta.Hf for Hg(I) is 0 kJ/mol.

The Delta.Hf for Cl2(g) is 0 kJ/mol.

The Delta.Hf for N2(I) is 0 kJ/mol.

Answers

The enthalpy of formation (ΔHf​) of [tex]Br_2[/tex]​(g) at 1.00 atm and 298 K is 0 kJ/mol. Hence, option A is correct.

What does ΔHf mean?

The standard enthalpy of formation is defined as the enthalpy change for creating one mole of a compound from elements in their standard states.

The enthalpy of formation (ΔHf​) of [tex]Br_2[/tex] ​(g) at 1.00 atm and 298 K is 0 kJ/mol.

It is because the enthalpy of formation of the molecule is only 0 in its standard state and for bromine, the standard state at 298K is the liquid state.

Hence, option A is correct.

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Answer:

A: The Δ.Hf for Br2(I) is 0 kJ/mol.

C: The Δ.Hf for Hg(I) is 0 kJ/mol.

D: The Δ.Hf for Cl2(g) is 0 kJ/mol.

Explanation:

Balance the equation by inserting coefficients as needed. equation: C 2 H 6 O+O 2 longrightarrow CO 2 +H 2 O

Answers

The coefficients needed to balance the equation would be 2, 7, 4, and 6 respectively.

Balancing chemical equation

This requires that the number of atoms of each element is the same both on the reactant and product's sides.

Hence, the balanced equation of the reaction becomes:

[tex]2C_2 H_6 O+ 7O_2 --- > 4CO_2 +6H_2 O[/tex]

Thus, the coefficient for each species would be 2, 7, 4, and 6 respectively.

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What is the molality of 35 g acetone dissolved in 0.95 kg water? The molar mass of acetone is 58.1 g/mol.

Answers

The molality of 35 g acetone dissolved in 0.95 kg water is 0. 63 mol/kg

How to determine the molality

Using the formula:

Molality = number of moles of solute÷ mass of solvent

Note that number of moles = mass divided by the molar mass

mass of acetone = 35g

Molar mass of acetone = 58. 1g/mol

Number of moles of acetone = 35÷ 58.1 = 0.602 mole

Molality of acetone = 0. 602÷ 0. 95 = 0. 63 mol/kg

Hence, the molality of acetone is 0. 63 mol/kg

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Which statement is true of magnets

Answers

The statement that is true about magnets is ''Similar poles of a magnet repel each other.''

What are the characteristics of magnet?

All magnets have both north and south poles. Opposite poles attract each other, whereas the similar poles repel each other. When you rub a piece of iron along a magnet, this force creates a magnetic field.

So we can conclude that The statement that is true about magnets is ''Similar poles of a magnet repel each other.''

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The kind of
reproduction that requires two
parents is called

What’s the answer for 3 and 8 please answer as soon as Possible due tomorrow morning.

Answers

Answer:

fgrthrdfghgfgfhfdhfdh

Explanation:

fdhhfgdghhdfghdfhgfhgfgh


1. Write an unbalanced equation to represent each of the following equations. (Make sure to
show diatomic elements.)
(a) iron and sulfur react to form iron(II) sulfide
(b) hydrogen gas and oxygen gas react to form water
(c) aluminum oxide reacts to form aluminum and oxygen gas
(d) zinc and copper(II) sulfate react to form zinc(II) sulfate and copper
(e) potassium hydroxide and hydrogen bromide react to form potassium bromide and
water

Answers

The equation for each reaction is written according to the relevant as below.

Equations of chemical reactions

The reaction between iron and sulfur to form iron (II) sulfide is written as:

  [tex]Fe + S --- > FeS[/tex]

The reaction between hydrogen gas and oxygen gas to form water is written as:

[tex]H_2 (g) + O_2 (g) --- > H_2O (l)[/tex]

The reaction of aluminum oxide to form aluminum and oxygen gas is written as:

[tex]Al_2O_3 --- > Al + O_2[/tex]

Zinc and copper(II) sulfate react to form zinc(II) sulfate and copper as follows:

[tex]Zn+CuSO_4--- > ZnSO_4+Cu[/tex]

Potassium hydroxide and hydrogen bromide react to form potassium bromide and water as follows:

[tex]KOH + HBr --- > H_2O + KBr[/tex]

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The direction of a reflected ray will always match its:
angle of incidence.
refracted ray.
diffused angle.
None of the choices are correct.

Answers

Answer:

angle of incidence.

Select the correct answer.
Which of the following is a physical model of the Sun?
O A.
an equation that describes the Sun's motion
OB.
a chart that lists the temperatures of different parts of the Sun
O C.
a computer program that shows how the Sun changes over time
O D. a paragraph that describes the Sun's structure
OE.
a small yellow ball that represents the Sun

Answers

E. a small yellow ball that represents the Sun

hope this helps!!

20.0 g of bromic acid, HBrO3, is reacted with excess HBr.

HBrO3 (aq) + 5 HBr (aq) → 3 H2O (l) + 3 Br2 (aq)

What is the theoretical yield of Br2 for this reaction? Round your answer to the nearest gram.

Answers

After Rounding off The percentage yield is 64%

What is Percentage Yield ?

It is the ratio of actual yield to theoretical yield multiplied by 100% .

It is given in the question

20.0 g of bromic acid, HBrO3, is reacted with excess HBr.

The reaction is

HBrO₃ (aq) + 5 HBr (aq) → 3 H₂O (l) + 3 Br₂ (aq)

Actual yield = 47.3 grams

Molecular weight of Bromic Acid is 128.91 gram

Moles of Bromic Acid = 20/128.91 = 0.155 mole

Mole fraction ratio of Bromic Acid to Bromine is 1 :3

Therefore for 0.155 mole of Bromic Acid 3 * 0.155 = 0.465 mole of Bromine is produced.

1 mole of Bromine = 159.8 grams of Bromine

0.465 of Bromine = 74.31 grams of Bromine

Percentage Yield = (47.3/74.31)*100 = 63.65 %

After Rounding off The percentage yield is 64% .

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Answer:

74g

Explanation:

The other person had said that the Percentage Yield = (47.3/74.31)*100 = 63.65 %

So, since to find the percent yield you have to divide the actual yield by the theoretical yield, I would assume the theoretical yield is 74.31g (74g if you round to the nearest gram)

A neutral atom of Sodium (Na) has an atomic number of 11 and an atomic mass of 23. Therefore, Na has _________________________ protons.

Answers

Answer:

11

Explanation:

Atomic number is the number of PROTONS an element has .

Balance this reaction.


CO +
H2 →
CH3OH

Answers

1 Co + 2 H2 > CH3OH

That’s the balance equation

How many total atoms are there in one molecule of C145H293O168?

Answers

Answer:

606 atoms

Explanation:

Add the numbers    145 + 293 + 168

A crate holds 20 boxes of sewing supplies. Each box contains 8 spools of thread. Each spool has 250 meters of thread wrapped around it. What length of thread is contained in a crate?

Answers

Answer: 40000

Explanation:

250*8=2,000

2000*20=40000

Every spring has an equilibrium position. Which statements describe a spring at its equilibrium position? Check all that apply.

The spring constant is zero.
The elastic potential energy is at a maximum.
The elastic potential energy is zero.
The displacement of the spring is at a maximum.
The net force acting on the spring is zero.

Answers

The statements describe a spring at its equilibrium position is the elastic potential energy is zero, the displacement of the spring is at a maximum and the net force acting on the spring is zero.

What is the equilibrium position?

A body is in equilibrium when the sum of all forces acting on it equals zero. According to Newton's First Law, when resulting from the laws that act on a body that remains in a state of restriction or in motion in its motion, it remains uniformly null.

In this case the only statements that match the definition of equilibrium position are:

The elastic potential energy is zero.The displacement of the spring is at a maximum.The net force acting on the spring is zero.

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Calculate the mass of 162 L of chlorine gas, measured at STP.

Answers

Answer:

V=162 l

Vm=22.4 mol/l

n=V/Vm=7.23 moles

n=m/M M Cl=35.4

m=n×M

m=256.01 grams

Which of the following is true about homogeneous mixtures?

a) They consist of two or more phases.
b) They are always liquids.
c) They have compositions that never vary.
d) They are known as solutions.

Answers

the answer is that d is true and the correct answer

What most likely happens when water vapor cools?

It changes into gas.
It changes into liquid.
Its temperature increases.
Its temperature remains constant.

Answers

Answer:

hello :)

Explanation:

Water vapor in the air reaches its dew point as it cools in the air around the can, forming liquid drops of water. Condensation is the process where water vapor becomes liquid.

Which of the following shows the wavelengths of light that an atom gives off when an electron falls to a lower energy level?
O A. Absorption spectrum
O B. Quantum spectrum
O C. Electromagnetic spectrum
O D. Emission spectrum​

Answers

The wavelengths of light that an atom gives off when an electron falls to a lower energy level corresponds to Emission spectrum , Option D is the correct answer.

What is Emission Spectrum ?

Light is absorbed or emitted when an electron jumps or falls into an energy level.

The energy of light absorbed or emitted is equal to the difference between the energy of the orbits.

Therefore , the wavelengths of light that an atom gives off when an electron falls to a lower energy level corresponds to Emission spectrum.

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considering the temperature vs. time graph below, how does the temperature at the beginning of a change of state
ompare with the temperature at the end of the change?

O The temperature is always lower.
O The temperature is always the same.

O The temperature is usually lower.
The temperature is usually higher.

Answers

Answer:

temp is same

Explanation:

The change of state portionsof the graph are at 2  and 4....and the temp is the same at the beginning and ends.

 change of state is a constant temp process

Part E
Tsunami evacuation plans often consider the elevation of the community and its distance from the shoreline when
deciding which towns to evacuate. How could this data help in building new homes and communities along coastal areas
that are prone to tsunamis?

Answers

Answer:

make the house elevated

All light rays parallel to the optical axis of a concave mirror are:
refracted.
reflected through the focal point.
diffused.
incandescent.

Answers

Answer:

A. Refracted

Explanation:

Incident rays parallel to the optical axis are reflected from the mirror.

How many grams of Ca(OH)2 are needed to produce 500 ml of 1.66 M Ca(OH)2 solution?

Answers

61.5 grams of Ca(OH)2 are needed to produce 500 ml of 1.66 M Ca(OH)2 solution. Details about mass can be found below.

How to calculate mass?

The mass of a substance can be calculated by multiplying the number

of moles of the substance by its molar mass.

However, in this question, the number of moles in 500 ml of 1.66 M Ca(OH)2 solution must be calculated first.

no of moles = 1.66M × 0.5L

no of moles = 0.83moles

molar mass of Ca(OH)2 = 74.093 g/mol

mass of Ca(OH)2 = 74.093 × 0.83 = 61.5g

Therefore, 61.5 grams of Ca(OH)2 are needed to produce 500 ml of 1.66 M Ca(OH)2 solution.

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select the correct answer from each drop down menu how do you the freezing point and boiling point of a solution compare with those of us pure solvent? The freezing point of the solution is ___ and the boiling point is _____ than that of its pure solvent.

Answers

Explanation:

select the correct answer from each drp down

How do the valence electrons of an atom affect chemical reactions?

Answers

Answer:

Electrons of an atom can affect chemical reactions, because electrons have a negative charge, which can introduce a form of energy.

An acid is used to bring the pH of a solution from pH 9 to pH 6. How many times more acidic is the final solution than the initial solution?

Select one:

a.
3


b.
10


c.
100


d.
1000

Answers

Bleh bleh bleh bleh bleh bleh bleh bleh and bleh

A helium balloon possesses a volume of 2500 L at a temperature of 114 °C. What volume will the balloon have if the temperature changes to 56 °C? The pressure remains constant

Answers

Given that the pressure remains constant, if the temperature of the helium balloon decreases to the given value, the volume increases to 2125.5L.

What is Charles's law?

Charles's law states that "the volume occupied by a definite quantity of gas is directly proportional to its absolute temperature.

It is expressed as;

V₁/T₁ = V₂/T₂

Given the data in the question;

Initial temperature of gas T₁ = 114°C = (114+273.15)K = 387.15KInitial volume of gas V₁ = 2500LFinal temperature T₂ = 56°C = (56+273.15)K = 329.15KFinal volume V₂ = ?

V₁/T₁ = V₂/T₂

V₂ = V₁T₂ / T₁

V₂ = ( 2500L × 329.15K ) / 387.15K

V₂ = 882875LK / 387.15K

V₂ = 2125.5L

Given that the pressure remains constant, if the temperature of the helium balloon decreases to the given value, the volume increases to 2125.5L.

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answer number ! and fill in the unkown

Answers

The identity of the unknown compound is Urea from the Table# given. The reason for this identification will further be discussed below.

What is melting point?

Melting point can be defined as the point at which a substance changes from a solid phase or state to a liquid state

When two substances of different melting points are added together, the total melting point obtained is usually depressed.

From the table,

When urea and benzoic acid is added the melting point range becomes = 117-120

When urea and Cinnamic acid is added the melting point range becomes= 100-125, and both of which is lower than the individual melting points.

Therefore, the identity of the unknown compound is Urea from the Table# given.

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What is the pH of a solution that has a [H+] = 0.010 mol/L?

Answers

Answer:

pH = 2

A 0.010 M solution of hydrochloric acid, HCl, has a molarity of 0.010 M. This means that [H+] = 1 x 10-2 M. The pH of this aqueous solution of H+ ions is pH = 2

hope this helps :3

how many moles are in 150 grams lf NaOH

Answers

Answer:

3.75 mole

Explanation:

molecular mass of NaOH = 39.97 gm

i.e,

==>39.97 gm NaOH contains 1 mole of NaOH

==>1 gm of NaOH contains 1/39.97 mole of NaOH

==>150 gm of NaOH contains (1/39.97) *150 mole of NaOH

==>150 gm of NaOH contains 3.75 mole of NaOH.

Give the postional isomers of 2 halopropane
(CH3)2CH​

Answers

Give the positional isomers of 2 halopropane

(CH3)2CH​

answer:

    is in file download it

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