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Luden [163]
3 years ago
15

What is the percent composition of carbon in K2CO3?

Chemistry
1 answer:
Arturiano [62]3 years ago
6 0

Answer:

8,68%

Explanation:

12g/mol de C divided by 138,2 g/mol de K2CO3

0.0868 x 100 = 8.68 %

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Potassium superoxide is a yellow paramagnetic solid that reacts with water according to the following balanced equation. Calcula
babunello [35]

<u>Answer:</u> The mass of potassium superoxide required is 142.2 grams

<u>Explanation:</u>

The chemical equation for the reaction of potassium superoxide with water follows:

2KO_2+H_2O\rightarrow KOH+KHO_2+O_2;\Delta H=2405J

Number of moles of potassium superoxide reacted = 2 moles for given amount of heat released

To calculate the mass for given number of moles, we use the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}

Molar mass of potassium superoxide = 71.1 g/mol

Moles of potassium superoxide = 2 moles

Putting values in above equation, we get:

2mol=\frac{\text{Mass of potassium superoxide}}{71.1g/mol}\\\\\text{Mass of potassium superoxide}=(2mol\times 71.1g/mol)=142.2g

Hence, the mass of potassium superoxide required is 142.2 grams

4 0
3 years ago
Use the ideal gas law to calculate the pressure in atmospheres of 0.21 mol of helium (He) at 16°C &amp; occupying 2.53 L. You mu
chubhunter [2.5K]

Answer:

The answer to your question is 2.32 atm

Explanation:

Data

P = ?

n = 0.214

V = 2.53 L

T = 61°C

R = 0.082 atm L/mol°K

Formula

PV = nTR

solve for P

P = nRT/V

Process

1.- Calculate the temperature in K

°K = °C + 273

°K = 61 + 273

    = 334

2.- Substitution

P = (0.214 x 0.082 x 334) / 2.53

3.- Simplification

P = 5.86/2.53

4.- Result

P = 2.32 atm

4 0
3 years ago
The overall process of photosynthesis has the balanced chemical equation 6CO2 + 6H2O --&gt; C6H12O6 + 6O2. What does this tell y
torisob [31]

Answer:

Equal parts are needed to make glucose and oxygen. The excess oxygen is released into the air

Explanation:

This equation explains why having plants in your house is good.

7 0
3 years ago
Classify each statement as a property of ethers, alcohols, or both ethers and alcohols?
natita [175]

Explanation:

1. Only alcohols forms hydrogen bond  between themselves and with other compounds containing an O-H, N-H, or F-H bond, such as water.

2. Alcohols up to 4 carbons are miscible in water because they have hydrogen bonded to oxygen and can form hydrogen bond with water. However, it is not possible for ethers.

3. When comparing ethers and alcohols of similar molecular weights, ethers have lower boiling point than alcohol. This is because of the presence of hydrogen bond in alcohols.

8 0
3 years ago
In a solution of salt and water, which component is the solute?
Sliva [168]
The component of the solute is SALT.
7 0
4 years ago
Read 2 more answers
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