Which substance can not be broken down by a

Chemistry

1 answer:

Tomtit [17]3 years ago

7 0

Answer: (3) silicon

Explanation:

Element is a pure substance which is composed of atoms of similar elements.It can not be decomposed into simpler constituents using chemical reactions.Example: Silicon (Si)

Compound is a pure substance which is made from atoms of different elements combined together in a fixed ratio by mass.It can be decomposed into simpler constituents using chemical reactions. Example: ethane $(C_2H_6)$ , propanone $(CH_3COCH_3)$ and water $(H_2O)$

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wolverine [178]

Answer:

The correct option is d

Explanation:

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3 years ago

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aleksley [76]

False, although the air is moving in an equilibrium us normal humans can not see the air actually moving. So it is false.

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3 years ago

Which one of this is endothermic and which one is exothermic?

pickupchik [31]

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Dominik [7]

Answer:

9 g/ml

Explanation:

5 + 3.3 = 8.5

But you should use sig figs.

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Therefore the 8.5 rounds up to 9

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3 years ago

How many grams of KBr are required to make 350. mL of a 0.115 M KBr solution?

Vsevolod [243]

0.115 M means that 0.115 moles of KBr are contained in a volume of 1000 ml, therefore a volume of 350 ml will have (0.115 × 0.35) = 04025 moles
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6 0

3 years ago

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