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balandron [24]
2 years ago
6

In the reaction C + O2 → CO2, 18 g of carbon react with oxygen to produce 72 g of carbon dioxide. What mass of oxygen would be n

eeded in the reaction?
18 g
54 g
72 g
90 g
Chemistry
2 answers:
vova2212 [387]2 years ago
5 0

Answer:

54g of O2 reacted in the reaction

german2 years ago
4 0

Answer:

54g

Explanation:

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A flask containing helium gas is connected to an open-ended mercury manometer. The open end is exposed to the atmosphere, where
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Answer:

726 torr

Explanation:

Generally, atmospheric pressure can be measured using a manometer which is in form of a U-shaped tube. In addition, 1 mm Hg is equivalent to 1 torr. Therefore, 752 torr is equivalent to 752 mm Hg. Therefore, the total pressure will be equivalent to the atmospheric pressure (mm Hg) + the mercury height.

In this case, the mercury height = -26 mm

Thus:

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Atoms of which two elements have combined total of 23 protons​
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sodium and magnesium

Explanation:

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marishachu [46]

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4 0
3 years ago
If 1 mol of XO₂ contains the same number of atoms as 60 g of XOs, what is the molar mass of XO₂?
Lena [83]

Answer:

44 grams/mole

Explanation:

<u>If 1 mol of XO₂ contains the same number of atoms as 60 g of XO3, what is the molar mass of XO₂?</u>

<u></u>

60 grams of XO3 is one mole XO3, since it has the same number of atoms as 1 mole of XO2.

Let c be the molar mass of X.  The molar mass of XO3 is comprised of:

X:  c

3O:  3 x 16 = 48

Total molar mass of XO3 is = <u>48 + c</u>

We know that the molar mass of XO3 = 60 g/mole, so:

48 + c  = 60 g/mole

c = 12 g/mole

The molar mass of XO2 would be:

1 X = 12

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Molar mass = 44 grams/mole, same as carbon dioxide.  Carbon's molar mass is 12 grams.

<u></u>

<u></u>

5 0
2 years ago
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