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Vlad [161]
2 years ago
13

PLS HELP!!!!

Chemistry
2 answers:
Mashcka [7]2 years ago
7 0

Answer:

the 3rd answer

White raven [17]2 years ago
4 0

How do the products of chemical reactions compare to their reactants?

Answer:

The products often have completely different properties than the reactants.

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Sierra did 500 J of work to move her couch. If she exerts 250 N of force on the couch, How fat did she move it? (Work: W = Fd
Elodia [21]
W=F*d

W= 500 J
F = 250 N

500 J = 250 N * d
d= 500J/250 N = 2 J/N = 2(N*m)/N = 2 m
Answer is 2 m.
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3 years ago
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In one of his experiments, Lavoisier placed 10.0 grams of mercury (II) oxide into a sealed container and heated it. The mercury
inysia [295]

Oxygen gas produced : 0.7 g

<h3>Further explanation</h3>

Given

10.0 grams HgO

9.3 grams Hg

Required

Oxygen gas produced

Solution

Reaction⇒Decomposition

2HgO(s)⇒2Hg(l)+O₂(g)

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mass of reactants = mass of products

mass  HgO = mass Hg + mass O₂

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mass O₂ = 0.7 g

4 0
3 years ago
2. How do chemical reactions involve energy?
Vesnalui [34]

Answer:Chemical reactions often involve changes in energy due to the breaking and formation of bonds. Reactions in which energy is released are exothermic reactions, while those that take in heat energy are endothermic. exothermicA description of a chemical reaction that releases heat energy to its surroundings.

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2 years ago
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