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Simora [160]
3 years ago
14

In a science experiment, Javi concludes that a chemical reaction has occurred. What evidence would support this conclusion?

Chemistry
2 answers:
Naily [24]3 years ago
8 0

Answer:

B) a substance's color and odor changed        Explanation: A signal that a chemical change has occurred is when its odor (its smell) or its appearance has changed.

Romashka [77]3 years ago
6 0

Answer:

that correct answer is The product is not poisonous or odorous like chlorine, and it’s no longer a metal like sodium. It does not have the same properties as either reactant. Also, the white “dust” in the video indicates that a reaction has taken place.

Explanation:

i take the test

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Which words or phrases identify layers of groundwater?
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The ground water refers to water present in the under earth in the cracks or pores or similar spaces.We majorly depends upon this sources of water specially in rural area.

It helps in irrigation and also serve as drinking water supply.

The words or phrases which identify layer of ground water are:

a) water table: the uppermost water saturated layer

b) kettle lake: it is an underground lake (not ground water)

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The ability of sodium chloride to dissolve in water is an example of a (D, right?)
kupik [55]
D) Physical Change, I would argue, because you can reverse this change by boiling off (evaporating) the water. But there are arguments for both physical and chemical change being what occurs.

A physical change results in a change of the material's appearance, but no new chemical products result. A chemical change involves a chemical reaction, with new substances produced as a result of the change.
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