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3 years ago

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A sample of argon gas collected at a pressure of 0.918 atm and a temperature of 279 K is found to occupy a volume of 719 millili

ters. How many moles of Ar gas is in the sample?
mol

1 answer:

babymother [125]3 years ago

3 0

Yeah i have 0 idea i’m sorry.

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Find the number of CoCl2 units present in a 0.78 mol sample.

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$\qquad\qquad\huge\underline{{\sf Answer}}$

Here we go ~

1 mole of $\sf{ COCl_2}$ has 6.022 × 10²³ molecules of the given compound.

So, 0.78 mole of $\sf{COCl_2}$ will have ~

$\qquad \sf \dashrightarrow \: 0.78 \times 6.022 \times 10 {}^{23}$

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How many grams are in 11.9 moles of chromium?

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Explanation:

It is known that one mole of chromium or molar mass of chromium is 51.99 g/mol.

It is given that number of moles is 11.9 moles.

Therefore, calculate the mass of chromium in grams as follows.

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mass in grams = No. of moles × Molar mass

= 11.9 moles × 51.99 g/mol

= 618.68 g

Thus, we can conclude that there are 618.68 g in 11.9 moles of chromium.

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