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2 years ago

Hydrogen peroxide is a liquid that decomposes to form oxygen gas and

Chemistry

1 answer:

ehidna [41]2 years ago

6 0

A would be the answer to this question

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Ph of 66666666666666666666666

tresset_1 [31]

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3 years ago

The characters' traits are revealed primarily through A) dialogue B) imagery C) narration Eliminate D) soliloquy

AysviL [449]

Answer: A) Dialogue

Explanation: You didn’t really give me anything, so the best answer I would go with is A.

6 0

4 years ago

Read 2 more answers

A 0.539 g sample of a metal, M, reacts completely with sulfuric acid according to the reaction M(s)+H2SO4(aq)⟶MSO4(aq)+H2(g) A v

Charra [1.4K]

Answer:

The molar mass of the metal is 54.9 g/mol.

Explanation:

When we work with gases collected over water, the total pressure (atmospheric pressure) is equal to the sum of the vapor pressure of water and the pressure of the gas.

Patm = Pwater + PH₂

PH₂ = Patm - Pwater = 1.0079 bar - 0.03167 bar = 0.9762 bar

The pressure of H₂ is:

$0.9762bar.\frac{1atm}{1.013bar} =0.9637atm$

The absolute temperature is:

K = °C + 273 = 25°C + 273 = 298 K

We can calculate the moles of H₂ using the ideal gas equation.

$P.V=n.R.T\\n=\frac{P.V}{R.T} =\frac{0.9637atm \times 0.249L }{(0.08206atm.L/mol.K)\times298K} =9.81 \times 10^{-3} mol$

Let's consider the following balanced equation.

M(s) + H₂SO₄(aq) ⟶ MSO₄(aq) + H₂(g)

The molar ratio of M:H₂ is 1:1. So, 9.81 × 10⁻³ moles of M reacted. The molar mass of the metal is:

$\frac{0.539g}{9.81 \times 10^{-3} mol} =54.9g/mol$

4 0

4 years ago

A solution has a hydrogen ion (or hydronium ion) concentration of 3.16×10−9M.

mel-nik [20]

pH = 9.5

Explanation:

We know that the hydronium ion concentration is [H₃O⁺] = 3.16 × 10⁻⁹ M.

The formula for pH is:

pH = -lg[H₃O⁺]

We input the known values to find the pH:

pH = -lg[3.16 × 10⁻⁹]

pH = 9.5

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6 0

3 years ago

Compare and contrast nitrogen and phosphorus cycles

azamat

The phosphorous cycle does not include an atmospheric component because phosphorous does not cycle through the atmosphere. In comparison, important processes of the carbon and nitrogen cycle occur in the atmosphere

7 0

3 years ago