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Which equation demonstrates the law of conservation of mass?
A chemical reaction is shown.
SnO2 + H2 → Sn + H2O
What is true about this chemical reaction?
Ling is learning about chemical reactions in science class. She measured out 45 grams of vinegar and 10
grams of baking soda. When she mixed them together, a bubbling reaction occurred. After the reaction
stopped, she weighed the mixture and found that it weighed 54 grams. Which of the following best explains why
the mixture weighed less than the original ingredients?
CO + ___H2 –> CH4 + H2O
2NaCl + CaO –> ___Na2O + CaCl2
___Pb + S –> PbS + Pb
Match each part of the following chemical equation with its correct term:
Al + O2 –> 4AlO3
Al + O2
Which of the following is a balanced equation?
When balancing a chemical equation, which of the following can be changed?
Which of the following is correct about reactions?
Look at the following equation.
__Au2O3 → __Au + __O2
In order to follow the law of conservation of mass, this equation must have which set of coefficients, in order from
left to right?
C2H5OH + ___O2 –> 2CO2 + 3H2O