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3 years ago

How many grams are in 11.9 moles of chromium?

Chemistry

2 answers:

Black_prince [1.1K]3 years ago

8 0

1mole ----- 52g Cr
11,9moles --- x

x = 11,9*52/1 = 618,8[g]

raketka [301]3 years ago

7 0

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.

No. of moles = $\frac{mass in grams}{Molar mass}$

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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Answer:

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Explanation:

In the given problem, we need to calculate the change in the entropy of the system and also the change in the entropy of the surroundings, and the resulting total change in entropy, when a sample of nitrogen gas of mass 14 g at 298 K and 1.00 bar doubles its volume. We have the following variable:

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Δ $S_{sys}$ = 0

Since heat energy is not transferred from the system to the surrounding

Δ $S_{sur}$ = 0

total change in entropy = Δ $S_{sys}$ +Δ $S_{sur}$ = 0

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