2 years ago

Which of the following is NOT a medium through which a mechanical wave can travel?

Chemistry

2 answers:

ipn [44]2 years ago

5 0

Answer:

maybe a

Explanation:

i looked it up and it said

mechanical waves always require a medium to travel and cannot travel in a vacuum

Olin [163]2 years ago

4 0

Answer:

A. vacuum

your welcome

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How much concentrated 18M sulfuric acid is needed to prepare 250mL of a 6.0M solution?

slavikrds [6]

C₁ * V₁ = C₂ * V₂

18 * V₁ = 6.0 * 250

18 V₁ = 1500

V₁ = 1500 / 18

V₁ = 83.33 mL

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2 years ago

On a trip of 555 miles, an automobile consumed 55.5 gallons of gasoline costing $4.55 per gallon.

bagirrra123 [75]

Answer:

0.455

Explanation:

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andrew-mc [135]

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3 years ago

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Great Sand Dunes National Park in Colorado is famous for its giant sand dunes. Sand dunes are landforms that are found in desert

Anit [1.1K]

Either b or c :), i’m not quite sure

5 0

2 years ago

Calculate the number of moles of a gas that is present in a 7.55 L container at 45°C, if the gas exerts a pressure of 725mm Hg.

vovikov84 [41]

<u>Answer:</u> The number of moles of gas present is 0.276 moles

<u>Explanation:</u>

To calculate the number of moles of gas, we use the equation given by ideal gas:

PV = nRT

where,

P = Pressure of the gas = 725 mm Hg

V = Volume of the gas = 7.55 L

n = number of moles of gas = ?

R = Gas constant = $62.3637\text{ L.mmHg }mol^{-1}K^{-1}$

T = Temperature of the gas = $45^oC=(45+273)K=318K$

Putting values in above equation, we get:

$725mmHg\times 7.55L=n\times 62.3637\text{ L.mmHg }mol^{-1}K^{-1}\times 318K\\\\n=0.276mol$

Hence, the number of moles of gas present is 0.276 moles

4 0

2 years ago