3 years ago

How do you know if a chemical change has taken place?

1 answer:

6 0

There are a few ways to tell if a reaction has taken place, these include temperature change, color change, formation of a precipitate, bubbling, and even odors. These all indicate that a chemical change has taken place.

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Mice21 [21]

Density increases.......

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3 years ago

What type of reaction is Ni + MgSo4

kumpel [21]

Chemical- it produces ammonia.

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3 years ago

Krupton (Kr) is a A. Gas B. Metal C. Non of these D. Metalloid

Katarina [22]

B is gas

The chemical element krypton is classed as a noble gas and a nonmetal.

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3 years ago

Plants and animals can build up or break down rock by increasing weathering, erosion, and

alexgriva [62]

Answer:

false

Explanation:

Weathering describes the breaking down or dissolving of rocks and minerals on the surface of the Earth. Water, ice, acids, salts, plants, animals, and changes in temperature are all agents of weathering.

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3 years ago

The mass in g of 3 moles Al .

Damm [24]

Answer:

81 gm

Explanation:

The mass of 1 mole is 27 g

So, Mass of 3 moles of Aluminium would be 3 × 27 = 81 gm..Thus mass of 3 Moles of Aluminium is 81 gm.

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3 years ago