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3 years ago

PLEASE HELP! DUE IN 5 MINS SUPER EASY CHEMISTRY!!

Chemistry

1 answer:

lbvjy [14]3 years ago

5 0

Answer:

Explanation:

Since they all are 2 mols worth, all you have to do is count the number of atoms in each molecule

H2SO4 contains 2 hydrogen 1 sulfur 4 oxygen = 7 atoms

H2S contains 2 hydrogen and 1 sulfur = 3 atoms

H3PO4 contains 3 hydrogens 1 phosphorus 4 oxygens = 8 atoms

HNO3 contains 1 hydrogen 1 nitrogen and 3 oxygens = 5 atoms

You have the right answer.

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DNA makes RNA, which makes O ATP O plasma O lipids O proteins HELP ASAP PLEASE!

Akimi4 [234]

Answer:

It makes proteins ....................

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3 years ago

What is the difference between a molecular formula and a molecular model?

icang [17]

There really isn't a difference if you think about it

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4 years ago

Read 2 more answers

how many grams of calcium oxide will be produced in a closed vessel containing 20.0 kg of calcium and 20.0 kg of oxygen gas if t

sergejj [24]

Answer:

27984.1311 g

Explanation:

The formula for the calculation of moles is shown below:

$moles = \frac{Mass\ taken}{Molar\ mass}$

For calcium :-

Mass of calcium = 20.0 kg = 20000 g ( 1 kg = 1000 g )

Molar mass of calcium = 40.078 g/mol

Thus,

$Moles= \frac{20000\ g}{40.078\ g/mol}$

$Moles\ of\ calcium= 499.0269\ mol$

For oxygen gas :-

Mass of oxygen gas = 20.0 kg = 20000 g ( 1 kg = 1000 g )

Molar mass of oxygen gas = 31.999 g/mol

Thus,

$Moles= \frac{20000\ g}{31.999\ g/mol}$

$Moles\ of\ oxygen\ gas= 625.0195\ mol$

According to the given reaction:

$2Ca+O_2\rightarrow 2CaO$

2 moles of calcium reacts with 1 moles of oxygen gas

Also,

1 mole of calcium react with 1/2 mole of oxygen gas

So,

499.0269 mole of calcium react with $\frac{1}{2}\times 499.0269$ mole of oxygen gas

Moles of oxygen gas = 249.5135 moles

Available moles of oxygen gas = 625.0195 moles

Limiting reagent is the one which is present in small amount. Thus, calcium is limiting reagent.

The formation of the product is governed by the limiting reagent. So,

2 moles of calcium produces 2 moles of calcium oxide

So,

1 mole of calcium produces 1 mole of calcium oxide

Also,

499.0269 mole of calcium produces 499.0269 mole of calcium oxide

Moles of calcium oxide = 499.0269 moles

Molar mass of calcium oxide = 56.0774 g/mol

Mass of calcium oxide = Moles × Molar mass = 499.0269 × 56.0774 g = 27984.1311 g

27984.1311 g of calcium oxide will be produced.

8 0

4 years ago

List four greenhouse gases in the atmosphere. For each gas, describe its prevalence in the atmosphere, its natural sources, its

lukranit [14]

Answer:

Fossil fuels, carbon dioxide, gases released from polluted waste, and gases released in the air that are trapped in our atmosphere

Explanation:

5 0

4 years ago

What is the molarity of a solution that contains 45 mEq Ca“ per liter?

Mashutka [201]

Answer:

0.0225 M

Explanation:

In one liter of this solution, there are 45 mEq of Ca⁺².

1 mEq of Ca⁺² is equal to 20 mg of Ca⁺. We know this by dividing its molar mass (40) by the charge of the ion (2).

Meaning that 45 mEq of Ca⁺² is equal to (45 * 20) 900 mg of Ca⁺².

Now we convert 900 mg of Ca⁺² into moles, using its molar mass:

900 mg / 1000 = 0.9 g

0.9 g Ca⁺² ÷ 40 g/mol = 0.0225 mol Ca⁺²

Finally we calculate the molarity of the solution:

Molarity = moles / liters

0.0225 mol / 1 L = 0.0225 M

7 0

3 years ago