3 years ago

Which of the following instruments is used to measure air pressure?

Chemistry

1 answer:

timama [110]3 years ago

5 0

Barometer, it is used to measure air pressure

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Which statement best explains why a carbon atom can bond easily with other atoms?

Kruka [31]

The best and most correct answer among the choices provided by the question is the second choice.

Carbon can easily bond with other atoms because it is an organic element.

I hope my answer has come to your help. God bless and have a nice day ahead!

3 0

3 years ago

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MgNH4PO4•6H2O loses H2O in a stepwise fashion as it is heated. Between 40 degrees celsius and 60 degrees celsius, the monohydrat

tino4ka555 [31]

Answer:

$\%\ Composition\ of\ phosphorus=20.00\ \%$

Explanation:

The molecular formula of the monohydrate formed = $MgNH_4PO_4.H_2O$

The molecular mass of the monohydrate formed = $Mass_{Mg}+Mass_{N}+6\times Mass_{H}+5\times Mass_O$

So, Mass = 24 + 14 + 6 × 1 + 5 × 16 = 155 g

Mass of phosphorus = 31 g

Thus,

$\%\ Composition\ of\ phosphorus =\frac{Mass_{phosphorus}}{Total\ mass}\times 100$

$\%\ Composition\ of\ phosphorus=\frac{31}{155}\times 100$

$\%\ Composition\ of\ phosphorus=20.00\ \%$

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3 years ago

What is the density of a 805 g sample of pure silicon with a volume of 2.3 cm3?

MAVERICK [17]

The density of it would be 57. Do the math and apply the formula to it and you would get this answer.

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3 years ago

7. ____ is a chemical compound that forms tangled fibers in the cell walls of plants.

Kruka [31]

1. option C. cellulose

2. option A. angiosperms (I found in Internet that they represent 80% of the green plants)

8 0

3 years ago

write down the name and molecular formula of the compound which gives hydrogen ion and chloride ion in the solution state.

podryga [215]

Answer:

Hydochloric acid

HCl

Explanation:

The name of the compound that gives hydrogen ion and chloride ions in the solution state is Hydrochloric acid.

Hydrochloric acid is made up of one atom of hydrogen and 1 atom of chlorine. We can also say, it is made up of 1 mole of hydrogen and 1 mole of chlorine.

The formula of this compound is HCl;

In solution:

HCl $_{aq}$ → H⁺ + Cl⁻

8 0

3 years ago