General Chemistry Answers

Write the electronic distribution in the atom x.

How many moles of O2 are required to react with 2.0 moles H2?

Hydrochloric acid can be neutralized by using solid calcium hydroxide according to the following equation: Ca(OH)2(s) + 2 HCl(aq)  CaCl2(aq) + 2 H2O(l). Calculate the molarity of 85.0 mL of HCl that reacts completely with 5.85g of Ca(OH)2. 

How many moles of nitrogen, N, are in 74.0 g of nitrous oxide, N2O?

A bubble of air has a volume of 0.150 mL at 24.2˚C. If the pressure remains constant, what is the volume of the bubble at 62.5 ˚C

How many moles of HNO₃ will be produced from the reaction of 33.5 g of NO₂ with excess water in the following chemical reaction?

3 NO₂(g) + H₂O (l) → 2 HNO₃(g) + NO(g)

In the net ionic equation for the reaction between a weak acid and strong base, what are the major species on the reactants side?

Select one:

a.

Molecules of acid; ions of the base

b.

Ions of the acid; ions of the base

c.

Ions of the acid; molecules of base

d.

Molecules of acid; molecules of base

e.

All species are spectator ions, thus there are no major species on the reactants side

How many moles of nitrogen gas would be produced if 7.83 moles of copper(II) oxide were reacted with excess ammonia in the following chemical reaction?

2 NH₃(g) + 3 CuO (s) → 3 Cu(s) + N₂(g) + 3 H₂O(g)

How many moles of NO₂ would be required to produce 6.22 moles of HNO₃ in the presence of excess water in the following chemical reaction?

3 NO₂(g) + H₂O (l) → 2 HNO₃(g) + NO(g)

When copper is heated with an excess of sulfur, copper(I) sulfide is formed. In a given experiment, 0.0970 moles of copper was heated with excess sulfur to yield 6.15 g copper(I) sulfide. What is the percent yield?