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Gemiola [76]
3 years ago
12

Sean has trouble remembering all the geometry formulas. What can he do to make sure he doesn’t forget there formulas during his

test?
Chemistry
1 answer:
GaryK [48]3 years ago
7 0

Answer:

3.write the formulas somewhere on his test when he gets it

Explanation:

Some people may have problems memorizing a large number of formulas, especially those that have to do with science. In addition to the fact that there are many tips that people can use when memorizing these formulas, one of those tips is to write the formulas somewhere in the exam when they have it, so Sean will have the list of formulas on hand when you need them to use in your exam.

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Explanation :

First we have to calculate the mole of C_2H_2 gas.

Using ideal gas equation:

PV=nRT

where,

P = Pressure of C_2H_2 gas = 748 mmHg - 23.8 mHg = 724.2 mmHg = 0.953 atm   (1 atm = 760 mmHg)

V = Volume of C_2H_2 gas = 5.50 L

n = number of moles C_2H_2 = ?

R = Gas constant = 0.0821L.atm/mol.K

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Putting values in above equation, we get:

0.953atm\times 5.50L=n\times (0.0821L.atm/mol.K)\times 298K

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Now we have to calculate the moles of CaC_2

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From the balanced chemical reaction we conclude that,

As, 1 mole of C_2H_2 gas produced from 1 mole of CaC_2

So, 0.214 mole of C_2H_2 gas produced from 0.214 mole of CaC_2

Therefore, the number of moles of CaC_2 reacted was, 0.214 moles.

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