Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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9. When a candle has been burning for an hour,
its mass is less than it was at the beginning.
(a) How is it possible for the candle to
lose mass without violating the law of
conservation of mass?
(b) How might you find the mass of the
missing material?
14. Hydrochloric acid reacts with zinc.
The chemical equation for this reaction is
Zn(s) + 2 HCl(aq) → H2(g) + ZnCl2(aq)
a) Classify this reaction.
(b) Name the product that forms bubbles
in this reaction. How do you know?
c) How does the mass of zinc metal
change as the reaction proceeds?
d) What does the (aq) symbol in the
equation mean?
24. Consider this chemical equation:
Zn + 2 AgNO3 → Zn(NO3)2 + 2 Ag
a) How many atoms of zinc are on the left
side of the equation? How many are on
the right?
(b) How many atoms of silver are on the left
side of the equation? How many are on
the right?
(c) Is the equation balanced? Explain.
25.How are coefficients different from
subscripts in equations?
30. Consider this neutralization reaction:
HCl + NaOH → NaCl + H2O
a) Which substances are the reactants?
(b) Which product is an ionic compound?
(c) Name the reactants and products.
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