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Leto [7]
3 years ago
15

If an unknown substance CANNOT be broken down into simpler substances, it is

Chemistry
1 answer:
lisov135 [29]3 years ago
5 0

The correct answer is b. an element

The explanation:

when the ELEMENT is define as substance that cannot be decomposed (broken down) into simpler substances by ordinary chemical means. Examples: gold, iron, carbon, hydrogen, oxygen, nitrogen

Ex: diamond will be broken into carbon as well.

and SUBSTANCE: Material composed of only one kind of matter throughout (same atoms or same molecules).

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An object with a mass of 4.0 kg has a force of 12.0 newtons applied to it. What is the resultant acceleration of the object?
Zigmanuir [339]

Answer:

3m/s²

Explanation:

Force applied to an object can be calculated thus;

F = ma

Where;

F = force applied (Newtons)

m = mass of substance (kg)

a = acceleration (m/s²)

According to the information provided in this question, F = 12.0 newtons, m = 4.0 kg, a = ?

Derived from F = m.a

We have; a = F/m

a = 12/4

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The resultant acceleration of the object is 3m/s².

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Answer:

Option B. PV = nRT.

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From the above,

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Substituting the value of C into equation (1), we have:

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Therefore,

PV = nRT

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Who said atoms are neither created nor destroyed in chemical reactions?
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