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4 years ago

I need help as soon as posible

Chemistry

1 answer:

In-s [12.5K]4 years ago

3 0

2. CO
3.O2
4.NH3
5.NO
6.NO2
7.CO2
8.H2

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Which statement is correct about the water cycle?

OleMash [197]

Answer:

precipitation is when water flows into the ground

Explanation:

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3 years ago

A 58.33-g sample of milk of magnesia, Mg(OH)2, always contains 24.31g of magnesium, 32.00g of oxygen, and 2.02g of hydrogen. Fin

ASHA 777 [7]

The mass percentage of each element in the milk of magnesia is, 41.68% Mg, 54.86% Oxygen, and 3.46% Hydrogen elements

Give the total mass of a sample of milk of magnesia Mg(OH)₂ as 58.33 g

We are to calculate the percentage by mass of each element

$\% mass =\frac{mass \ of \ element}{mass \ of \ sample} \times 100$

For Magnesium:

Mass of magnesium = 24.31g

$\% mass \ of \ Mg = \frac{24.31}{58.33} \times 100\\ \% mass \ of \ Mg =\frac{2431}{58.33} \\ \% mass \ of \ Mg = 41.68\%$

For oxygen element:

Mass of oxygen = 32.00g

$\% mass \ of \ O_2 = \frac{32}{58.33} \times 100\\ \% mass \ of \ O_2 =\frac{3200}{58.33} \\ \% mass \ of \ O_2 = 54.86\%$

For the hydrogen element

Mass of hydrogen = 2.02g

$\% mass \ of \ H_2 = \frac{2.02}{58.33} \times 100\\ \% mass \ of \ H_2 =\frac{202}{58.33} \\ \% mass \ of \ H_2 = 3.46\%$

Hence the mass percentage of each element in the milk of magnesia is, 41.68% Mg, 54.86% Oxygen, and 3.46% Hydrogen elements.

Learn more here: brainly.com/question/20065048

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3 years ago

Explain how an equation can be balanced even if the number of reactant particles differs from the number of product particles

swat32

<span>Hey :)

Add coefficients in front of the products and/or reactants to get the same amount of particles on both side</span>

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3 years ago

Reacting Solutions of Aluminum Chloride with Potassium Hydroxide

gizmo_the_mogwai [7]

1Al2(SO4)3 + 3ZnCl2 → 2AlCl3 + 3ZnSO4

The coefficients represents moles. There is 1 mole of Aluminum Sulfate, 3 moles of Zinc(II) Chloride, 2 moles of Aluminum Chloride, and 3 moles of Zinc(II) Sulfate.

Now add all the coefficients/moles.

9 is the sum of all the coefficients.

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3 years ago

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The molecule CH20 contains two single bonds and one double bond.<br> True<br> False

dem82 [27]

Answer:

True

Explanation:

The molecule CH20 contains two single bonds and one double bond.

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3 years ago