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3 years ago

Question 4 of 5

Chemistry

1 answer:

ladessa [460]3 years ago

8 0

Answer:

A. 8

Explanation:

For this to be a neutral atom there has to be the same amount of protons and neutrons.

brainliest please. . .

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Ammonium perchlorate (NH4ClO4) is a solid rocket fuel used in space shuttles. When heated above 200°C, it decomposes to a variet

Schach [20]

Answer:

This is True

Explanation:

Ammonium perchlorate (NH4ClO4) is a colorless and an oxidizer. It is formed from reaction between Ammonia and perchloric acid. They are used in the manufacture of solid rocket fuel which are used in space shuttles.

When it is heated above 200°C, it decomposes to a variety of gaseous products, of which the most important are N2, Cl2, O2, and water vapor(H2O).

NH3+ HClO4—> NH4ClO4

Ammonia+Perchloric acid to give Ammonium Perchlorate

3 0

4 years ago

What is the pressure of a gas if the volume is 96.2 L, the temperature is 25°C and there are 1.24 moles?

galben [10]

Answer:

0.315 atm

Explanation:

PV = nRT

P(96.2) = (1.24)(0.08206)(25 + 273)

P = 0.315 atm

6 0

3 years ago

Besides glycerol what 3 other molecules make up a triglyceride?

ICE Princess25 [194]

Triglyceride is a molecule constituted by one one molecule of glycerol and 3 molecules of fatty acids. The structure of a glycerol is like a letter "E", where the vertical line ( | ) is the glycerol and the three horizontal lines are long chains of organic acids, each with one COOH group, called fatty acids. The answer is that the other 3 molecules that make up a triglyceride are fatty acids.

6 0

3 years ago

Mercury(II) oxide (HgO) decomposes to form mercury (Hg) and oxygen (O2). The balanced chemical equation is shown below. 2HgO Rig

BigorU [14]

Taking into account the reaction stoichiometry, the correct answer is the third option: 15.63 moles of HgO are needed to produce 250 g of O₂.

In first place, the balanced reaction is:

2 HgO → 2 Hg + O₂

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

HgO: 2 moles
Hg: 2 moles
O₂: 1 moles

The molar mass of the compounds is:

HgO: 216.59 g/mole
Hg: 200.59 g/mole
O₂: 32 g/mole

Then, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:

HgO: 2 moles× 216.59 g/mole= 433.18 grams
Hg: 2 moles× 200.59 g/mole= 401.18 grams
O₂: 1 mole× 32 g/mole= 32 grams

Then the following rule of three can be applied: if by reaction stoichiometry 32 grams of O₂ are produced by 2 moles of HgO, 250 grams of O₂ are produced from how many moles of HgO?

$moles of HgO=\frac{250 grams of O_{2} x2 moles of HgO}{32grams of O_{2}}$

moles of HgO= 15.625 moles≅ 15.63 moles

Finally, the correct answer is the third option: 15.63 moles of HgO are needed to produce 250 g of O₂.

Learn more about reaction stoichiometry:

5 0

3 years ago

How do I balance chemical equations ?

Maru [420]

Answer & explanation:

To balance a chemical equation, we must make sure that there are equal amounts of each element in the equation on either side.

To balance an equation step-by-step we first start by counting the amount of each element on each side. If they aren't equal, we must make them amounts equal on either side.

After you make sure all the elements are balanced, the net charge on both sides must also be equal.

8 0

4 years ago