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3 years ago

A container with a volume of 893L contains how may moles of air at STP?

Chemistry

1 answer:

Vadim26 [7]3 years ago

7 0

Answer:

i think 54

Explanation:

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When there are no decomposers, what happens to the grass?

zavuch27 [327]

Answer:

if there would have been no decomposers on Earth, the whole of the Earth would have been filled with dead and decaying matter of plants and animals.

Explanation:

I hope this helps :3

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3 years ago

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Fe(s) + CuSO4(aq) <===> Cu(s) + FeSO4(aq)

Ludmilka [50]

Answer : The original concentration of copper (II) sulfate in the sample is, $5.6\times 10^{-1}g/L$

Explanation :

Molar mass of Cu = 63.5 g/mol

First we have to calculate the number of moles of Cu.

Number of moles of Cu = $\frac{\text{Mass of Cu}}{\text{Molar mass of Cu}}=\frac{89\times 10^{-3}g}{63.5g/mol}=1.40\times 10^{-3}mole$

Now we have to calculate the number of moles of $CuSO_4$

Number of moles of Cu = Number of moles of $CuSO_4$

Number of moles of $CuSO_4$ = $1.40\times 10^{-3}mole$

Now we have to calculate the molarity of $CuSO_4$

$\text{Molarity}=\frac{\text{Moles of }CuSO_4\times 1000}{\text{Volume of solution (in mL)}}$

Now put all the given values in this formula, we get:

$\text{Molarity}=\frac{1.40\times 10^{-3}mole\times 1000}{400.mL}=0.0035M$

To change mol/L into g/L, we need to multiply it with molar mass of $CuSO_4$

Molar mass of $CuSO_4$ = 159.609 g/mL

Concentration in g/L = $0.0035M\times 159.609g/mol=0.5586g/L\approx 5.6\times 10^{-1}g/L$

Thus, the original concentration of copper (II) sulfate in the sample is, $5.6\times 10^{-1}g/L$

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3 years ago

Describe how this instrument works.<br><br> Operation:

guapka [62]

Answer:

Microscope

Explanation:

6 0

3 years ago

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Match each alkane name with its structure.

9966 [12]

C3H8 = Propane

C7H16 = Heptane

C8H18 = Octane

C4H10 = butane

C10H22 = decane

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3 years ago

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Anthracite is so hard and pure it is also referred to as a _____.

Serga [27]

<span>Anthracite is also referred to as hard coal because it is so hard and pure. It is very hard and highly compacted with variety of coal that has submetallic luster. It has highest carbon content, the lowest impurities, and highest density of energy of all the coal deposits.</span>

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3 years ago