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3 years ago

Extension Questions:

Chemistry

1 answer:

Scorpion4ik [409]3 years ago

3 0

Answer:

a. 30.4%

bi. NO2

bii. N2O4

Explanation:

From the question given, we obtained the following:

% of oxygen = 69.6%

An oxide of nitrogen contains nitrogen and oxygen.

% of nitrogen = 100 — 69.6 = 30.4%

Please attachment on how to get the empirical and molecular formula.

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What is the density of ammonia (NH3) at 273 K and 1.00 atm? 0.7601 g/L 0.982 g/L 1.23 g/L 2.43 g/L

lisov135 [29]

Answer:The density of ammonia ( $NH_3$ ) at 273 K and 1.00 atm is 0.75 g/L.

Explanation:

Temperature of the gas = T = 273 k

Pressure exerted by the gas,P = 1.00 atm

Volume occupied by the gas = V

Number of moles of gas = n

PV=nRT (Ideal gas equation)

$PV=\frac{\text{Mass of ammonia gas}}{\text{Molar mass of the ammonia}}$

$\frac{P\times \text{Molar mass of ammonia}}{RT}=\frac{\text{Mass of ammonia gas}}{V}=\text{Density of the gas}$

Density of the gas:

$\frac{1 atm\times 17 g/mol}{0.0820 L atm\mol K\times 273 K}=0.75 g/L$

The density of ammonia ( $NH_3$ ) at 273 K and 1.00 atm is 0.75 g/L.

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3 years ago

How many moles of nitrogen are in 2.31L of N2

PtichkaEL [24]

Hey there!

N₂ has a density of 1.25 grams per liter.

We have 2.31 liters of N₂.

2.31 x 1.25 = 2.8875

We have 2.8875 grams of N₂.

Find molar mass of N₂:

N: 2 x 14

------------

28 g/mol

2.8875 ÷ 28 = 0.10

There is 0.10 mol of nitrogen in 2.31 L of N₂.

Hope this helps!

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3 years ago

Match these items.

notka56 [123]

Litmus is an indicator
Charged particles are ions
Acids contain H+ ions
Bases contain OH - ions
Hydronium ions are H3O+

Now, I have to take issue with the last one
A base of pH 14 is not a strong base, it would be a highly concentrated base. A strong base is a base that completely deionizes in water.

But technically, for the purpose of your answer strong base = pH 14

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slavikrds [6]