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Alchen [17]
3 years ago
14

How much energy would be released if 450.0 g of the substance completely reacted with oxygen?

Chemistry
1 answer:
SOVA2 [1]3 years ago
4 0

Answer:

1.1853 kJ

Explanation:

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A sample of trifluoroacetic acid, C2HF3O2, contains 38.9 g of oxygen. Calculate the mass of the trifluoroacetic acid sample.
qwelly [4]

Answer:

138.6 g of  C₂HF₃O₂ have 38.9 g of O

Explanation:

Trifluoroacetic acid → C₂HF₃O₂

Molar mass = Mass of C . 2 + Mass of H + Mass of F . 3 + Mass of O .2

Molar mass = 12 . 2 + 1 . 1 + 19 . 3 + 16 . 2 = 114 g /mol

1 mol of C₂HF₃O₂ has:

2 moles of C

1 mol of H

3 moles of F

2 moles of O

If we state the relation in mass by g we say:

114 g of  C₂HF₃O₂ have 24g of C, 1 g of H, 57 g of F and 32 g of O

Let's make a rule of three:

32 g of O are contained in 114 g of  C₂HF₃O₂

38.9 g of O may be contained in (38.9 . 114) / 32 = 138.6 g

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If you couldn't find a skillet to cook the pancake in, what other subject could you use? why?
SVEN [57.7K]

You might wanna use a pan. It would be one of the closest thing to a skillet

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EleoNora [17]

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Which ion has a charge of 2-?
nataly862011 [7]

Answer:

A

Explanation:

More electrons than protons, thus giving the atom an overall charge of -2

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which of the following is unique for any given element? a. the number of neutrons b. the charge on the electrons c. the number o
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The answer must be surely c.
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