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dusya [7]
2 years ago
8

4Na+O2 =2Na20

Chemistry
1 answer:
ki77a [65]2 years ago
8 0

11.625 moles of Na₂O  are produced.

<h3>What do you mean by the term mole ?</h3>

A mole is defined as the amount of a substance that contains exactly 6.02214076 × 10²³ ‘elementary entities’ of the given substance.

It can be represented by the following formula:

n = N/NA

To calculate moles of Na₂ O   produced are -:

40 gm of sodium

3.00 gm of oxygen

4 Na+ O₂----->2Na₂O

First calculate limiting reagent,

Stochiometric ratio,

a/b=4/1

=4

Molar ratio,

M/n=4/22/3/22=4/22×32/3

=1.93

As a/b>m/n

So, sodium is limiting reagent

4 Na+ O₂----->2Na₂O

As 32 g of O₂ produced =124 g of Na₂O

SO,

3 gm of O₂ produced =124×3/32

=11.625 gm

11.625 gm of Na₂O can be produced .

Learn more about mole ,here:

brainly.com/question/22540912

#SPJ1

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If 5.57 g of Ag2O is sealed in a 75.0-mL tube filled with 760 torr of N2 gas at 28 ∘C, and the tube is heated to 310 ∘C, the Ag2
Snezhnost [94]

Answer: Total pressure = 7293.2 torr or 9.60 atm

Explanation:

<em>Total pressure = partial pressure of nitrogen + partial pressure of oxygen</em>

The partial pressure due to nitrogen is determined using the equation of Gay-Lussac's law: <em>P₁/T₁=P₂/T₂</em>

P₁ = 760 torr = 1atm, T₁ = 28∘C = (273+28)K = 301k, P₂ = ?, T₂ = 310∘C =(310+273)K = 583K

P₂ = P₁ T₂/ T₁

P₂ = 760 * 583 / 301 = 1472.03 torr

The pressure due to Oxygen gas produced is calculated thus:

Balanced equation of the decomposition of Ag₂O at s.t.p. is as follows;

2Ag₂O ----> 4Ag + O₂(g)

2 moles of Ag₂O produces 1 mole of O₂

molar mass of Ag₂O = (2*108 + 16)g = 232g/mol

molar volume of gas at s.t.p. = 22.4L

2*232g i.e. 464g of Ag₂O produces 22.4L of O₂

5.57g of Ag₂O will produce 5.57g*22.4L/464g = 0.269L or 269mL of O₂

Using the General gas equation  P₁V₁/T₁=P₂V₂/T₂

P₁ = 1atm = 760 torr, V₁ = 269mL, T₁=273K, P₂ = ?, V₂= 75mL, T₂ = 583K

P₂ = P₁V₁T₂/V₂T₁

P₂ = 760*269*583 / 75*273

P₂ = 5821.17 torr

Total pressure = (1472.03 + 5821.17) torr

Total pressure = 7293.2 torr or 9.60 atm

7 0
3 years ago
A 75.0-liter canister contains 15.82 moles of argon at a pressure of 546.8 kilopascals. What is the temperature of the canister?
alexandr1967 [171]

Answer:

  • <u>312 K</u>

Explanation:

<u>1) Data:</u>

<em />

a) V = 75.0 liter

b) n = 15.82 mol

c) p = 546.8 kPa

d) T = ?

<u>2) Formula:</u>

  • Ideal gas equation: pV = nRT

Where:

  • n = number of moles
  • V = volume
  • p = absolute pressure
  • T = absolute temperature
  • R = Universal Gas constat: 8.314 kPa - liter / K-mol

<u>3) Solution:</u>

a) <u>Solve the equation for T</u>:

  • T = pV / (nR)

b) <u>Substitute and compute</u>:

  • T = 546.8 kPa × 75.0 l iter / (15.82 mol × 8.314 kPa-liter/K-mol) = 312 K

(since the volume is expressed with 3 significant figures, the answer must show also 3 significant figures)

8 0
4 years ago
How many moles are present in 25.0 grams of potassium permanganate
lorasvet [3.4K]

Answer:

0.158

Explanation:

HOPE THIS HELPS!!

8 0
3 years ago
A substance absorbed 895 J and caused its temperature to increase by 10 ºC. If the substance has a mass of 27.9 g, what is the s
Irina18 [472]

Answer:

i dont get the equation sorry wish i can help

5 0
3 years ago
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What is the formula for the conjugate base formed by the following acid<br> HCN
meriva

Answer:

HCN - Hydrogen cyanide The conjugate acid of CN- is HCN. HCN stands for hydrogen cyanide. The conjugate acids are a combination of a strong acid and a low base.

5 0
3 years ago
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