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2 years ago

3.1.4 Quiz: Covalent Bonds

Chemistry

2 answers:

juin [17]2 years ago

8 0

Answer:

C. When hydrogen has two electrons in its valence shell, it has a full valence shell.

D. Hydrogen can bond with oxygen to make water.

As both C & D are correct, there would be two answers.

Hope this helps!

Explanation:

Ksenya-84 [330]2 years ago

5 0

Answer:

The answer is A: Hydrogen has only one electron shell.

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2000 km/sec. Convert that to<br> m/sec.

koban [17]

Answer:

2000 km/sec

1km=1000m

2000×1000

2000,000 m/sec

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4 years ago

Complete the sentence.

GREYUIT [131]

Answer:

Chemical change

Explanation:

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4 years ago

If an 85.0 mL container of helium gas at standard pressure is heated from 20 C to 91 C and the pressure is increased to 2.8 atm

Luba_88 [7]

Answer:

V₂ = 37.71 mL

Explanation:

Given data:

Initial volume = 85.0 mL

Initial pressure = 1 atm

Initial temperature = 20°C (20 +273 = 293 K)

Final temperature = 91°C (91+273 = 364 K)

Final volume = ?

Final pressure = 2.8 atm

Formula:

P₁V₁/T₁ = P₂V₂/T₂

P₁ = Initial pressure

V₁ = Initial volume

T₁ = Initial temperature

P₂ = Final pressure

V₂ = Final volume

T₂ = Final temperature

Solution:

V₂ = P₁V₁ T₂/ T₁ P₂

V₂ = 1 atm× 85.0 mL × 364 K / 293 K × 2.8 atm

V₂ = 30940 atm.mL.K / 820.4 K.atm

V₂ = 37.71 mL

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3 years ago

What changes happens when you run ?

tekilochka [14]

Answer:

more detail please

Explanation:

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3 years ago

Read 2 more answers

Water (H2O) forms when hydrogen gas (H2) and oxygen gas (O2) react according to the equation below: 2H2 O2 → 2H2O What mass of w

AveGali [126]

The mass of water formed in the reaction is $\rm 1.63\;\times\;10^-^3$ g. Thus, option A is correct.

The balanced chemical equation for the formation of water is:

$\rm 2\;H_2\;+\;O_2\;\rightarrow\;2\;H_2O$

From the balanced chemical equation, 1 mole of oxygen forms 2 moles of water.

<h3>Computation for the mass of water</h3>

The moles of a compound is given by:

$\rm Moles=\dfrac{Mass}{Molar\;mass}$

The moles of oxygen reacted in the reaction are:

$\rm Moles\;O_2=\dfrac{1.45\;\times\;10^-^3\;g}{32\;g/mol} \\Moles\;O_2=0.045\;\times\;10^-^3\;mol$

The moles of water formed is:

$\rm 1\;mol\;O_2=2\;mol\;H_2O\\0.045\;\times\;10^-^3\;mol\;O_2=0.045\;\times\;10^-^3\;\times\;2\;mol\;H_2O\\0.045\;\times\;10^-^3\;mol\;O_2=0.09\;\times\;10^-^3\;mol\;H_2O$

The moles of water formed are $\rm 0.09\;\times\;10^-^3$ mol.

The mass of water is given as:

$\rm Mass=Moles\;\times\;Molar\;mass\\Mass\;H_2O=0.09\;\times\;10^-^3\;\times\;18\;g\\Mass\;H_2O=1.63\;\times\;10^-^3\;g$

The mass of water formed in the reaction is $\rm 1.63\;\times\;10^-^3$ g. Thus, option A is correct.

Learn more about mass formed, here:

brainly.com/question/7324123

8 0

3 years ago