Writing and Balancing Chemical Equations — Unit test Answers

The following balanced equation shows the formation of ammonia.N2 + 3H2 2NH3How many moles of nitrogen are needed to completely convert 6.34 mol of hydrogen?

The equation shows the reaction between zinc metal and hydrochloric acid.Zn(s) + 2HCl(aq) ZnCl2(aq) + H2(g)What is the theoretical yield of hydrogen gas if 5.00 mol of zinc are added to an excess of hydrochloric acid?

The balanced equation below shows the products that are formed when pentane (C5H12) is combusted. C5H12 + 8O2 5CO2 + 6H2OWhat is the mole ratio of oxygen to pentane?

What is the molar mass of fluorine, F2?

Which represents the empirical formula for X4Y8?

Which must be the same when comparing 1 mol of oxygen gas, O2, with 1 mol of carbon monoxide gas, CO?

Consider the chemical equation.2H2 + O2 2H2OWhat is the percent yield of H2O if 87.0 g of H2O is produced by combining 95.0 g of O2 and 11.0 g of H2?Use .

What is the percent by mass of potassium in K3Fe(CN)6?Use .

This formula equation is unbalanced.Pb(NO3)2(aq) + Li2SO4(aq) PbSO4(s) + LiNO3(aq) Which coefficient should appear in front of LiNO3 in the balanced equation?

What is the word equation for atoms of magnesium reacting with molecules of oxygen to produce magnesium oxide?

Which statement best describes a mole?

Consider the chemical equation for the combustion of sugar._C6H12O6(s) + _O2(g) _CO2(g) + _H2O(l)Which sequence of coefficients should be placed in the blanks to balance this equation?

Avogadro’s number was calculated by determining the number of atoms in

Which shows the correct relationship between the molecular formula and the empirical formula for C2H10N2?

What is the percent by mass of oxygen in carbon dioxide (CO2)?Use .

The equation below shows lithium reacting with nitrogen to produce lithium nitride.6Li + N2 2Li3NIf 12 mol of lithium were reacted with excess nitrogen gas, how many moles of lithium nitride would be produced?

Consider the chemical equation. 2NBr3 + 3NaOH N2 + 3NaBr + 3HOBrIf there are 40 mol of NBr3 and 48 mol of NaOH, what is the excess reactant?

Which statement correctly describes the actual yield and the theoretical yield of a reaction?

Consider the balanced equation below. 2H2S + 3O2 2SO2 + 2H2OWhich option gives the correct mole ratios?

Which symbol can be used to indicate a chemical reaction that takes place in the presence of a catalyst?