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Worksheets8.P.1.4
Total questions: 9
Worksheet time: 5mins
A chemical reaction occurs in a sealed test tube. As the results of the reaction 24 grams of product are produced. Which is most likely true?
The mass of the reactants was 24 grams
The mass of the reactants was less than 24 grams
The mass of the reactants was more than 24 grams
Which is a balanced chemical equation according to the law of conservation of mass?
CH4 + O2 ---> CO2 + 2H2O
CH4 +2O2 ----> CO2 + 2H2O
2CH4 + O2 ----> CO2 + 2H2O
Which is true of any physical or chemical reaction?
Mass increases
Mass fluctuate
Mass is conserved
If a chemical reaction starts with 10 times the amount of oxygen and hydrogen atoms shown which best describes the amount of product? 2H2+O2 ----> 2H2O
There would be 10 times more water molecules produced
There would be 20 times more water molecules produced
There would be the same amount of water molecules produces
Which chemical equation correctly demonstrates the conservation of mass?
KClO3 ---> KCl + O2
H2O +CO2 -----> H2CO3
Mg + HCl ----> H2 = MgCl2
When vinegar and baking soda are combined, a mixture is produced, and gas is released. Which statement is true?
The mass of the gas is equal to the mass of the vinegar and baking soda
The mass of the mixture and gas is equal to the mass of the vinegar and baking soda
The mass of the mixture and gas is greater than the mass of the baking soda and vinegar
Which ratio of reactants to products supports the law of conservation of mass?
1:1 because the mass of the reactants before the reaction is equal to the mass of the products after the reaction
1:2 because the mass of the reactants is doubled during the reaction
2:1 because the mass of the reaction is halved (cut in half) during the reaction
In the equation below, supposed 11 grams of zinc react with 12 grams of hydrogen chloride to form 16 grams of zinc chloride and an unknown amount of hydrogen gas.
Zn + 2HCl ----> ZnCl2 + H2
Base on the law of conservation of mass, how many grams of hydrogen gas will form?
1 gram
7 grams
10 grams
3P + 5O2 ----> P410
Balanced Equation
Unbalanced Equation
