CHEMISTRY HIGH SCHOOL

How many gram of nitrogen are needed to produce 325 gram of ammonia? n2(g) + 3h2(g) → 2nh3(g)

Answers

Answer 1

Answer:

Answer : The mass of nitrogen needed are, 267.68 grams

Explanation :

Mass of $NH_3$ = 325 g

Molar mass of $NH_3$ = 17 g/mole

Molar mass of $N_2$ = 28 g/mole

First we have to calculate the moles of $NH_3$ .

$\text{Moles of }NH_3=\frac{\text{Mass of }NH_3}{\text{Molar mass of }NH_3}=(325g)/(17g/mole)=19.12moles$

Now we have to calculate the moles of $N_2$ .

The balanced chemical reaction is,

$N_2(g)+3H_2(g)\rightarrow 2NH_3(g)$

From the balanced reaction we conclude that

As, 2 moles of $NH_3$ obtained from 1 mole of $N_2$

So, 19.12 moles of $NH_3$ obtained from $(19.12)/(2)=9.56$ moles of $N_2$

Now we have to calculate the mass of $N_2$ .

$\text{Mass of }N_2=\text{Moles of }N_2* \text{Molar mass of }N_2$

$\text{Mass of }N_2=(9.56mole)* (28g/mole)=267.68g$

Therefore, the mass of nitrogen needed are, 267.68 grams

Answer 2

Answer: Molar mass :

N₂ = 28.0 g/mol
NH₃ = 17.0 g/mol

N₂(g) + 3 H₂(g) = 2 NH₃(g)

28.0 g (N₂)---------> 2 x 17 g NH₃
? g ------------> 325 g NH₃

Mass N₂ = ( 325 x 28.0 ) / ( 2 x 17 )

Mass N₂ = 9100 / 34

= 267.64 g of N₂

hope this helps!

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Of the choices below, which is true for the relationship shown? a. It is Ka for the acid H3P2O72−. b. It is Kb for the acid H3P2O72−. c. It is Ka for the acid H2P2O72−. d. It is Kb for the acid H2P2O7

Answers

The expression for the Ka for the given acid is:

Ka = [H2P2O7^2-] [H3O+] /[H3P2O7^2-]

Ka is the acid dissociation constant or the acidity constant. It is a measure of the acid strength when in solution. It is an equilibrium constant for the dissociation of the acid.

Answer:

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Explanation:

The density of an elemental gas is 1.7824 g/l at stp. what is the molar mass of the element. what is the element?

Answers

Answer: The molar mass of the element is 40 g/mol and element is Calcium.

Explanation:

At STP:

1 mole of a gas contains 22.4 L of volume

Molar mass is defined as the mass of 1 mole of a substance.

To calculate mass of of the substance, we use the equation:

$\text{Density of substance}=\frac{\text{Mass of substance}}{\text{Volume of substance}}$

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The element having molar mass 40 g is Calcium.

Hence, the molar mass of the element is 40 g/mol and element is Calcium.

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Answers

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Answer:

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Explanation:

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Answers

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Answers

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