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2 years ago

Click the button that shows the correct relationship of the electron affinities of the elements sodium and phosphorus.

Chemistry

2 answers:

Akimi4 [234]2 years ago

4 0

Answer:

Phosphorus’ electron affinity value is more negative than the electron affinity value of sodium.

Explanation:

I got it correct

VikaD [51]2 years ago

3 0

Answer:

The second option

Explanation:

I took the quiz and got it correct

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Answer:

Carbon moves from living things to the atmosphere. Each time you exhale, you are releasing carbon dioxide gas (CO2) into the atmosphere. Animals and plants need to get rid of carbon dioxide gas through a process called respiration. Carbon moves from fossil fuels to the atmosphere when fuels are burned.

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2 years ago

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:

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

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3 years ago

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Answer:

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Example:

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2 years ago

4NH3 + 5O2-> 4NO + 6H2O<br><br> How many molesof NO are formed if 824g of NH3 react ?

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824 g NH3 (1 mol/17 g NH3) (4 mol NO/4mol NH3)

48.47 moles NO

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2 years ago

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Answer:

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Explanation:

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