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motikmotik
3 years ago
10

Which process is a chemical change?

Chemistry
1 answer:
dexar [7]3 years ago
6 0

Answer:

4

Explanation:

1, 2, and 3 are changes in the state of matter. 4 is a chemical reaction because the resulting products are different substances from the first one.

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Which kind of energy does an object have because of its height above Earth's
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Answer:

C po

Explanation:

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The shape of a molecule is trigonal planar. How many electron domains around the central atom does this molecule most likely hav
soldi70 [24.7K]
I would think that the answer would be three

Because of the prefix tri- in "tigonal"

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Metallic compounds are malleable. Which use of metallic bonds best represents this trait?
dem82 [27]

<u><em>In metallic bonding, the valence electrons are free to move throughout the metal structure. Metallic bonding is the electrostatic attraction between the metal atoms or ions and the delocalized electrons. This is why atoms or layers are allowed to slide past each other, resulting in the characteristic properties of malleability and ductility.</em></u>

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3 years ago
Write a word equation for the overall reaction that occurred in the baggie. The reactants are sodium bicarbonate, carbon dioxide
Fynjy0 [20]

Answer:

Explanation:

In a baggie, sodium bicarbonate is decomposed into sodium carbonate and carbondioxie and water is given off as gases:

6 0
3 years ago
Current Question:
IRISSAK [1]

Answer:

0.2g

Explanation:

All radiodecay follows the 1st order decay equation

A = A₀e^-kt

A => Activity at time (t)

A₀ => Initial Activity at time = 0

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T => time in units that match the decay constant

Half-Life Equation => kt(½) = 0.693 => k = 0.693/34 min = 0.0204min¹

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7 0
3 years ago
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