Chemical Reactions & the Mole (Test)

0.11 mol

A gram of cola contains about 39 grams of sucrose, C₁₂H₂₂O₁₁. How many moles of sucrose does this represent?

Yes, because there are the same number of atoms of each element in reactants and products

Does the chemical equation below demonstrate the law of conservation of mass? CH₄(g) + 2O₂(g) -> CO₂(g) + 2H₂O(l)

Divide the mass of the substance in grams by its molar mass

How can you convert the mass of a substance to moles?

1.80 x 10²⁴ atoms OR 6.02 x 10²⁴ atoms

How many atoms are there in 1 mole of CO₂?

A physical change

H₂O(s) -> H₂O(g) is an example of _____________.

Copper

If you have 1 mol of copper, 1 mol of gold, 1 mol of platinum, and 1 mol of silver, which has the least mass?

c. Oxygen

In a combustion reaction, one of the reactants is _____________. a. Hydrogen b. Nitrogen c. Oxygen d. A metal

The mass will stay the same

Suppose you mix solutions of solutions of silver nitrate, AgNO₃, with sodium hydroxide, NaOH. How does the mass of the reactants compare to the mass of the products in the container after the reaction is complete? AgNO₃(aq) + NaOH(aq) -> AgOH(s) + NaNO₃(aq)

Synthesis Reaction

The reaction 2Fe + 3Cl₂ -> 2FeCl₃ is an example of which type of reaction?

c. The reaction is reversible

The symbol (⇌) indicates that _______________. a. An incomplete combustion reaction has occurred b. Heat must be applied c. The reaction is reversible d. A gas is formed by the reaction

c. Solid copper reacts with a solution of hydrochloric acid to produce a solution of copper chloride and hydrogen gas

What is the correct description of this reaction? Cu(s) + 2HCl(aq) -> CuCl₂(aq) + H₂(g) a. Hydrogen gas reacts with a solution of copper chloride to produce solid copper metal in a solution of hydrochloric acid b. A solution of copper metal reacts with solid hydrochloric acid to produce a solution of copper chloride and hydrogen gas c. Solid copper reacts with a solution of hydrochloric acid to produce a solution of copper chloride and hydrogen gas d. Hydrogen gas reacts with solid copper chloride to produce solid copper metal in a solution of hydrochloric acid

234 g/mol

What is the molar mass of aluminum carbonate, Al₂(CO₃)₃, to the nearest gram per mole?

3.66 mol

What is the number of moles in 432g Ba(NO₃)₂?

Double Replacement Reaction

What type of chemical reaction is represented by this equation? AgNO₃(aq) + NaCI(aq) ->AgCI(s) + NaNO₃(aq)

Single Replacement Reaction

What type of chemical reaction is represented by this equation? 2Na(s) + 2HCl(aq) -> 2NaCl(aq) + H₂(g)

Decomposition Reaction

What type of chemical reaction is represented by this equation? CaCO₃(s) --> CaO(s) + CO₂(g)

6

When the chemical equation below is correctly balanced, what coefficient is placed in front of hydrogen gas? P₄(s) + H₂(g) ----> PH₃(g)

2

When the chemical equation below is correctly balanced, what coefficient is placed in front of water? HNO₃(aq) + Mg(OH)₂(aq) -> H₂O(l) + Mg(NO₃)₂(aq)

6

When the chemical equation below is correctly balanced, what coefficient is placed in front of water? C₂H₆(g) + O₂(g) ---> CO₂(g) + H₂O(g)

1

When the equation below is balanced, what coefficient is placed in front of H₂? Li(s) + H₂O(l) -> LiOH(s) + __H₂(g)

a. BaCO₃(s) -> BaO(s) + CO₂(g)

Which chemical equation correctly depicts the following reaction: solid barium carbonate is heated to produce solid barium oxide and carbon dioxide gas? a. BaCO₃(s) -> BaO(s) + CO₂(g) b. BaCO₃(s) -> BaO₂(s) + CO₂(g) c. BaCO₃(g) -> BaO(g) + CO₂(s) d. Ba(CO₃)₂(s) -> BaO(s) + CO₂(g)

b. 2Na₃PO₄(aq) + 3CaCl₂(aq) -> 6NaCl(aq) + Ca₃(PO₄)₂(aq)

Which chemical equation is correctly balanced? a. C₅H₁₂(l) + 6O₂(g) ----> 5CO₂(g) + 6H₂O(g) b. 2Na₃PO₄(aq) + 3CaCl₂(aq) -> 6NaCl(aq) + Ca₃(PO₄)₂(aq) c. Al(OH)₃(s) -> Al₂O₃(s) + 2H₂O(g)

d. PbI₂

Which compound is one of the products of the double replacement reaction below? KI + Pb(NO₃)₂ ----> _________ +_________ a. INO₃ b. K(NO₃)₂ c. K₂Pb d. PbI₂

Fluorine

Which element has a molar mass of 19 g/mole?

c. 2 mol of CaCl₂

Which has the greatest mass? a. 2 mol of HCl b. 2 mol of NaCl c. 2 mol of CaCl₂ d. 2 mol of KCl