Questions from General Chemistry

Q: The text explains that one reason why the actual yield for a

The text explains that one reason why the actual yield for a reaction may be less than the theoretical yield is side reactions. Suggest some other reasons why the percent yield for a reaction might no...

Q: Calculate the number of moles of the indicated substance in each of

Calculate the number of moles of the indicated substance in each of the following samples. a. 41.5 g of MgCl2 b. 135 mg of Li2O c. 1.21 kg of Cr d. 62.5 g of H2SO4 e. 42.7 g of C6H6 f. 135 g of...

Q: By now, you are familiar with enough chemical compounds to begin

By now, you are familiar with enough chemical compounds to begin to write your own chemical reaction equations. Write two examples of what we mean by a combustion reaction.

Q: According to his prelaboratory theoretical yield calculations, a student’s experiment should

According to his prelaboratory theoretical yield calculations, a student’s experiment should have produced 1.44 g of magnesium oxide. When he weighed his product after reaction, only 1.23 g of magnesi...

Q: Balance each of the following equations that describe synthesis reactions.

Balance each of the following equations that describe synthesis reactions. a. CaO(s) + H2O(l) Ca(OH)2(s) b. Fe(s) + O2(g) Fe2O3(s) c. P2O5(s) + H2O(l)...

Q: Balance each of the following equations that describe synthesis reactions.

Balance each of the following equations that describe synthesis reactions. a. Fe(s) + S8(s) FeS(s) b. Co(s) + O2(g) Co2O3(s) c. Cl2O7(g) + H2O(l) HClO4(aq)

Q: Balance each of the following equations that describe decomposition reactions.

Balance each of the following equations that describe decomposition reactions. a. CaSO4(s) CaO(s) + SO3(g) b. Li2CO3(s) Li2O(s) + CO2(g) c. LiHCO3(s) Li2CO3...

Q: Balance each of the following equations that describe oxidation– reduction reactions

Balance each of the following equations that describe oxidation– reduction reactions. a. Al(s) + Br2(l) AlBr3(s) b. Zn(s) + HClO4(aq) Zn(ClO4)2(aq) + H2(g) c. Na(s) +...

Q: When 3.269 g of zinc is heated in pure oxygen

When 3.269 g of zinc is heated in pure oxygen, the sample gains 0.800 g of oxygen in forming the oxide. Calculate the empirical formula of zinc oxide.

Q: Which of the following ions form compounds with Ag+ that are

Which of the following ions form compounds with Ag+ that are generally soluble in water? a. S2- b. Cl2 c. NO3- d. SO42- e. Na+