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olya-2409 [2.1K]
3 years ago
5

Is MgCo3 = MgO + CO2 redox reactions

Chemistry
1 answer:
chubhunter [2.5K]3 years ago
7 0
Yes they are equal reactions
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What mass of kcl in grams must be added to 500 ml of a 0. 15 m kcl solution to produce a 0. 40 m solution.
iren [92.7K]

91.4 grams

91.4 grams of kcl in grams must be added to 500 ml of a 0. 15 m kcl solution to produce a 0. 40 m solution.

C = mol/volume

2.45M=mol/0.5L

2.45M⋅0.5L = mol

mol = 1.225

Convert no. of moles to grams using the atomic mass of K + Cl

1.225mol * \frac{39.1+35.5}{mol}

mol=1.225

=1.225 mol . \frac{74.6g}{mol}

=1.225 . 74.6

=91.4g

therefore, 91.4 grams of kcl in grams must be added to 500 ml of a 0. 15 m kcl solution to produce a 0. 40 m solution.

What is 1 molar solution?

In order to create a 1 molar (M) solution, 1.0 Gram Molecular Weight of the chemical must be dissolved in 1 liter of water.

58.44 g make up a 1M solution of NaCl.

To learn more about molar solution visit:

brainly.com/question/10053901

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1 year ago
Why is balance important in organisms?
valentinak56 [21]
Therefore is very important because it ensures survival, existence and stability of the environment.
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Calculate the mass (in grams) of calcium carbonate present in a 50.00 mL sample of an aqueous calcium carbonate standard, assumi
horrorfan [7]
1 part per million is the same as 

<span>1 mcg/mL (mcg = 1 micro gram = 1 * 10^-6 grams). </span>
<span>125 ppm = 125 mcg/mL </span>

<span>125 mcg/ml * [1 gram / 1 * 10^6 mgrm] = 1.25 * 10^-4 grams </span>

<span>The density of hard water is 1.000 grams / mL </span>

<span>50 mL of water contains 1.25 * 10^-4 grams. </span>

<span>given mass = 1.25 * 10^-4 </span>
<span>Molar mass = 100.0 grams / mole </span>
<span>n = ????? </span>

<span>n = 1.25 * 10^-4/100 = 1.25 * 10^-6 moles. 

Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions.

</span>
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3 years ago
Give an example of biotic living conditions.
Brrunno [24]

Answer:

plants and animals

Explanation:

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