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joja [24]
2 years ago
13

Which of the following are compounds (select all that apply)

Chemistry
1 answer:
olga2289 [7]2 years ago
3 0

Answer:

KNO2, KBr

Explanation:

Chemical compounds are any substance composed of identical molecules consisting of atoms of two or more chemical elements. So NO2 and KBr are compounds, Br2 and Fe are not.

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zysi [14]
The answer is 15g
The mass of a substance when given the density and volume can be found by using the formula
Mass = Density x Volume
From the question
Density of chloroform=1.5 g/ml
Volume=10mL
We have
Mass=1.5x10
We have the final answer as
15g
5 0
2 years ago
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Answer:

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3 years ago
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The atomic number of polassium and
never [62]

Explanation:

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6 0
2 years ago
Which of the metals below will dissolve in hydrochloric acid, HCl? gold, Au copper, Cu silver, Ag magnesium, Mg
Lera25 [3.4K]
Magnesium (Mg)

The reason for this is the reactivity of the listed metals. Gold and silver are extremely unreactive metals. It is because of this unreactive nature that they remain in good condition for long periods of time, and are preferred in jewelry. Copper, although more reactive than gold and silver, is still not reactive enough to react with HCl. 
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3 years ago
Tim has just jumped out of an airplane.The force of gravity pulls him downward,while air resistance pushes him upward
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