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2 years ago

6

Ammonia (nh3) is widely used as a fertilizer and in many household cleaners. how much ammonia is produced when 6.64 mol of hydro

gen gas react with an excess of nitrogen gas

1 answer:

olga55 [171]2 years ago

5 0

N₂ + 3H₂ ⇒ 2NH₃

doesnt matterN₂ + 6.64H₂ ⇒ 2NH₃

(6.64H₂/3H₂) x (2NH₃) =4.4266667

rounded to sig figs= 4.43

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1. Tooth enamel consists mainly of hydroxyapatite (Ca5(PO4)3(OH). When tin(II)fluoride is added to toothpaste it reacts with the

Sliva [168]

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$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$ .....(1)

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Putting values in equation 1, we get:

$\text{Moles of tin(II)fluoride}=\frac{0.115g}{156.7g/mol}=0.00073mol$

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$SnF_2+2Ca_5(PO_4)_3(OH)\rightarrow 2Ca_5(PO_4)_3F+SnO+H_2O$

By Stoichiometry of the reaction:

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So, 0.00073 moles of tin (II) fluoride will react with = $\frac{2}{1}\times 0.00073=0.00146mol$ of hydroxyapatite

Now, calculating the mass of hydroxyapatite by using equation 1, we get:

Moles of hydroxyapatite = 0.00146 moles

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Putting values in equation 1, we get:

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Hence, the mass of hydroxyapatite that can be converted is 0.733 grams

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