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Phoenix [80]
2 years ago
13

I need help pls I will give you brainlist

Chemistry
1 answer:
White raven [17]2 years ago
5 0

Answer:

I think it is the second one

Explanation:

Because what the cold water did to the table salt, is that it separated its molecules dissolving the salt.

even though the rock salt was in hot water it was a bigger particle. But the big difference was only because the water temperature ️.

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Explanation:

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EleoNora [17]

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Copper has a density of 8.920 g/cm3. What mass of copper will occupy 45cm3? What volume of copper will have a mass of 1.0 kg?
mixas84 [53]
Density = mass/volume
so rearranged mass = volume x density
mass = 8.920 x 45 = 401.4g

rearrange   (there are 1000grams in 1kg)
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5 0
3 years ago
A student is titrating 50 mL of 0.32 M NH3 with 0.5 M HCl. How much hydrochloric acid must be added to react completely with the
Sveta_85 [38]

Answer:

The volume of HCl to be added to completely react with the ammonia is 0.032 L or 32mL

Explanation:

Using the formula

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Ca = 0.5 M

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Substituting for Va in the equation, we obtain:

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Va = 0.016 / 0.5

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The volume of HCl to be added to completely react with the ammonia is 0.032 L or 32mL

6 0
3 years ago
Which of these is a compound?<br><br> A. Steel<br><br> B.Sugar<br><br> C.Air<br><br> D.Nitrogen
hjlf

Sugar is a compound made of carbon, hydrogen and oxygen.

8 0
3 years ago
Read 2 more answers
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