chapter 4 take home

The synthesis of a certain drug can be carried out with 91.7% yield. In one experiment 14.8 g of the drug was obtained. What was the theoretical yield for this experiment?

16.1 g

In the industrial synthesis of acetic acid, methanol is reacted with carbon monoxide. The balanced equation for this reaction is: CH3OH(g) + CO(g) → CH3COOH(l)

16.6

What is the molar mass of water, H2O?

18.02 g

How many oxygen atoms are present in 5.20 mol of Al2(SO4)3?

3.76 × 10^25

A bicycle manufacturer has a stock of 50 frames 70 wheels, and 120 reflectors. If each bicycle manufactured requires 4 reflectors, how many bicycles can the manufacturer make?

30

You have a sample of 1.204 × 1024 atoms of gold. How much does this sample weigh?

394.0 g

Which of the following is the correct set of integer coefficients for the balanced equation, respectively: ___ CO2(g) + ___H2O(l) → ___C6H12O6(aq) + ___O2(g)

6, 6, 1, 6

How many molecules are present in one mole of glucose, C6H12O6?

6.02 × 10^23

A person drinks 1.50 × 103 g of water, H2O, per day. How many moles is this?

83.3

In a particular experiment to prepare a compound, the theoretical yield is 34.7 g. If the actual yield is 31.2 g, what is the percent yield?

89.9%

When a solution of Cu(II) chloride, CuCl2 , is added to a solution of potassium sulfide, K2S, a black precipitate of copper sulfide, CuS, forms. Which of the following is the net ionic equation for this reaction?

Cu2+(aq) + S2-(aq) → CuS(s)

Which of the following is true of a balanced chemical reaction?

In a balanced chemical equation, the number of atoms on the reactant side equals the number of atoms on the product side.

Which of the following is true of carbonate salts and phosphate salts?

Most carbonate salts and most phosphate salts are insoluble.

Which of the following is oxidation? a. loss of electrons b. loss of hydrogen c. gain of oxygen d. all of these

a. loss of electrons b. loss of hydrogen c. gain of oxygen

The balanced equation N2(g) + 2 O2(g) → 2 NO2(g) means which of the following?

one mole of nitrogen reacts with two moles of oxygen to form two moles of nitrogen dioxide.

0.789 mol of a particular substance weighs 142 g. What is the molar mass of this substance?

180 g

What is the formula weight of aluminum sulfate, Al2(SO4) 3?

342.2 amu

How many molecules are present in one mole of water, H2O?

6.02 × 10^23

The combustion of one mole of propane, C3H8, releases 531 kcal. How much heat is released by the combustion of 1.20 moles of propane?

637 kcal

How many hydrogen atoms are there in 2.50 mol of C6H12O6?

1.81 × 10^25

In the reaction Pb(s) + 2 Ag+(aq) → Pb2+(aq) + 2 Ag(s), which species is oxidized?

Pb(s)

1. The term molecular weight is strictly correct for which of the following?

covalent compounds

Which of the following is the correct set of integer coefficients for the balanced equation, respectively: ___ C6H14(g) + ___O2(g) → ___CO2(g) + ___H2O(g)

2, 19, 12, 14