1. How many moles are contained in 103.4g of sulfuric acid?
a) 2.9 * 10^22 molecules of sulfuric acid
b) 5.18 * 10^24 molecules of sulfuric acid
c)12.1 * 10^23 molecules of sulfuric acid
d) 6.35 * 10^23 molecules of sulfuric acid
2. Which of the following statements is true?
a) 1 mole H atoms = 6.02 * 10^23 H atoms
b) 1 mole pennies = 6.02 * 10^23 pennies
c) 6.02 * 10^23 H atoms have a mass of 1.0g
d) The formula mass of O= 32.00 amu
One mole of NH3 contains:
a) 1.806 * 10^24 atoms of hydrogen
b) 1.4g of nitrogen atoms
c) 6.02 * 10^23 molecules of ammonia
d) 7.0g of ammonia
Answers: 2
Chemistry, 22.06.2019 14:30
Consider the reduction reactions and their equilibrium constants. cu+(aq)+e−↽−−⇀cu(s)pb2+(aq)+2e−↽−−⇀pb(s)fe3+(aq)+3e−↽−−⇀fe(=6.2×108=4.0×10−5=9.3×10−3 cu + ( aq ) + e − ↽ − − ⇀ cu ( s ) k =6.2× 10 8 pb 2 + ( aq ) +2 e − ↽ − − ⇀ pb ( s ) k =4.0× 10 − 5 fe 3 + ( aq ) +3 e − ↽ − − ⇀ fe ( s ) k =9.3× 10 − 3 arrange these ions from strongest to weakest oxidizing agent.
Answers: 3
Chemistry, 22.06.2019 14:30
For the reaction shown, find the limiting reactant for each of the following initial amounts of reactants. 4al(s)+3o2(g)→2al2o3(s) a) 1 molal, 1 mol o2 b) 4 molal, 2.6 mol o2 c) 16 molal, 13 mol o2 d) 7.4 molal, 6.5 mol o2
Answers: 3
1. How many moles are contained in 103.4g of sulfuric acid?
a) 2.9 * 10^22 molecules of sulfuric ac...
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