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3 years ago

The atmosphere is a(n) _____. 1. element 2. compound 3. mixture

2 answers:

8 0

The atmosphere is a layer of gasses surrounding the planet.
Our atmosphere is a mixture of elements like nitrogen and oxygen, and compounds like carbon dioxide and water.

tensa zangetsu [6.8K]3 years ago

5 0

The atmosphere is a mixture of gasses.

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Which 4 planets belong together? which 4 planets lumped together have the most similarities

andrey2020 [161]

Answer:

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Explanation:

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3 years ago

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If A and B are directly proportional and the value of A becomes 3 times as much, what happens to B

dolphi86 [110]

B gets multiplied 3 times as much aswell. (brainly pls) :D

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3 years ago

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Calculate the volume in liters of a M potassium dichromate solution that contains of potassium dichromate . Round your answer to

maksim [4K]

The question is incomplete, here is the complete question:

Calculate the volume in liters of a 0.13 M potassium dichromate solution that contains 200. g of potassium dichromate . Round your answer to 2 significant digits.

<u>Answer:</u> The volume of solution is 5.2 L

<u>Explanation:</u>

To calculate the volume of solution, we use the equation used to calculate the molarity of solution:

$\text{Molarity of the solution}=\frac{\text{Mass of solute}}{\text{Molar mass of solute}\times \text{Volume of solution (in L)}}$

We are given:

Molarity of solution = 0.13 M

Given mass of potassium dichromate = 200. g

Molar mass of potassium dichromate = 294.15 g/mol

Putting values in above equation, we get:

$0.13M=\frac{200}{294.15\times \text{Volume of solution}}\\\\\text{Volume of solution}=\frac{200}{294.15\times 0.13}=5.23L$

Hence, the volume of solution is 5.2 L

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3 years ago

How many moles of malachite should be formed when 1.5 moles of copper sulphate reacts with an excess of sodium carbonate?

Katen [24]

2 Na₂CO₃ + 2 CuSO₄ + H₂O → CuCO₃.Cu(OH)₂ + 2 Na₂SO₄ + CO₂
Malachite molar mass = 221.1 g / mol
So 2 moles CuSO₄ produce 1 mole of malachite
so 1.5 mole CuSO₄ produce (0.75) mole malachite
Mass of malachite = 0.75 mole * 221.1 g/ mol = 165.83 g

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3 years ago

Is a CAS number a physical or chemical property

katrin [286]

Chemical

Hope that helps

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3 years ago