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notsponge [240]
3 years ago
14

NEED HELP DESPERATELY!!!

Chemistry
2 answers:
Yakvenalex [24]3 years ago
6 0

Answer:

The density of tube A is greater then the density of tube B having more mass inside of the smaller area.

Explanation:

stepladder [879]3 years ago
5 0

Answer:

A is denser.

Explanation:

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Give atleast 5 differences in cell structures of plant and animal cells
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32. List three examples of substances. Explain why each<br> is a substance. (3.1)
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Explanation:

8 0
3 years ago
What is the mass (in grams) of 9.79 × 1024 molecules of methanol (CH3OH)?
nevsk [136]
We will use this formlula: Mass in grams = Number of moles x Molecular mass of 1 mole.

Since, we know the avagadro number is 6.02 x 10²³, we only have two unknown values left which are the molecular mass of CH3OH and its mole.

Molecular Mass: C = 12, H= 1, O = 16, since we have C=12, H4 = 4, O = 16, we will add them up: 12 + 4 + 16 =32

We know that one mole of anything = 6.02 x 10²³.
So we will use this formula to find the mole of methanol: Number of moles = Number of molecules / Avagadro number

Number of moles of CH3OH = (9.79 x 10^24)/6.02 x 10²³) =  16.263 moles.

Now we know that the molecular mass = 32 and the mole is = 16.263.

Now we can find its mass by using this formula: <span>Mass in grams = Number of moles x Molecular mass of 1 mole.
</span>
Mass in grams = 16.263 x 32 = 520g






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Oxygen, with an atomic number of 8, is a neutral atom and would have ___________ electrons in the first electron shell and _____
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