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lapo4ka [179]
2 years ago
7

Can i have someone do this its my birthday and im giving a brainlist

Chemistry
1 answer:
MrRa [10]2 years ago
6 0

Answer:

1.) density can be defined as the mass of the substance in unit volume

density=mass/volume

2.)2.70g/mL

mass of the block =146

length× width×height=54cm=54mL

density=mass/volume =146 g/54 mL =2.70 g/mL

3.) 3.39 g/mL

4.)Accepted value is the value that scientists and community accept as true. This is a theoretical value.

5.)Percent error is 9.11 % The element which has 7.13 g/cm³ as density is Zinc (Zn).

Explanation:

I helped my brother with it and he got it right let me know if it was right for you too:)

thank me if it was

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9.05 mol of oxygen gas to g of oxygen gas
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hope this helps!
7 0
2 years ago
Colder air tends to have _____.
iogann1982 [59]

Answer:

I believe the answer is D

Explanation:

C is not correct

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3 years ago
What does the energy hill represent on an energy diagram?
Butoxors [25]

Answer:

The correct answer is option D.

Explanation:

When a chemical reaction proceeds the reactants are converted into products. The energy hill represents the potential energy of the reaction.

There are two conditions: If the reaction is endothermic than the energy of the products is greater than the energy of the reactants and  ΔH  is positive. This energy gain is shown in the form of a peak.  In an exothermic reaction, the energy of the products is lower than the reactants and  ΔH  is negative.

So the suitable option is D which states that the reaction is endothermic and the potential energy gained by the products is higher when a reaction proceeds.

6 0
3 years ago
A sugar cube was placed into a beaker containing 100 mL of water at room temperature and completely dissolved into the water. Th
Bad White [126]

Answer:

Boil the water until it evaporates

Explanation:

If the water evaporates the sugar will no longer bond to it and then percipitate at the bottom of the beaker.

3 0
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