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MAVERICK [17]
3 years ago
10

Will mark brainliest!

Chemistry
1 answer:
KatRina [158]3 years ago
6 0

Answer:

b. 1.20x10^24 molecules NH3

Explanation:

At STP, one mole of gas has a volume of 22.4 dm^3

1 dm^3 = 1 L

Therefore,

44.8 L = 44.8 dm^3

This means that there are 2 moles of NH3 in 44.8 L at STP.

number of molecules = number of moles times avogadro's number

Avogadro's number = 6.02x10^23

Numner of molecules = 2 x 6.02x10^23

= 1.204x10^23 molecules

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Use the following balanced reaction to solve:
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Answer:  60.7 g of PH_3 will be formed.

Explanation:

To calculate the moles :

\text{Moles of solute}=\frac{\text{given volume}}{\text{Molar volume}}    

\text{Moles of} H_2=\frac{60L}{22.4L}=2.68moles

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P_4(s)+6H_2(g)\rightarrow 4PH_3(g)

H_2 is the limiting reagent as it limits the formation of product and P_4 is the excess reagent.

According to stoichiometry :

6 moles of H_2 produce = 4 moles of PH_3

Thus 2.68 moles of H_2 will produce=\frac{4}{6}\times 2.68=1.79moles  of PH_3

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3 years ago
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The spectrophotometer really measures the percent of light that is transmitted through the solution. The instrument then convert
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Hey there!:

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Inessa05 [86]

Answer:

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