Chemistry, 28.12.2019 13:31 apexdude2020

question 1 (1 point)
saved
in the first reaction with epsom salt added to ammonia, what evidence was there for a chemical reaction taking place?

question 1 options:

color change

formation of a precipitate

increase in temperature

formation of bubbles

question 2 (1 point)
in the second reaction with iron and oxygen, what evidence for a chemical reaction was not observed?

question 2 options:

new substance formed

formation of a precipitate

color change

change in temperature

question 3 (1 point)
in the third reaction which gas is released when baking soda is added to vinegar?

question 3 options:

carbon dioxide

hydrogen gas

water

oxygen

question 4 (1 point)
in the fourth reaction with copper sulfate and sodium hydroxide, what is the precipitate that is formed?

question 4 options:

cu(oh)2

naoh

cuso4

na2so4

Answers: 2

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question 1 (1 point)
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in the first reaction with epsom salt added to ammonia, what...

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