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1 year ago

Which statement best describes the reflection of a wave?

Chemistry

2 answers:

PilotLPTM [1.2K]1 year ago

6 0

Answer: A, a wave bounces off the surface of a material.

Explanation: A wave cannot pass through a material, it doesn’t fail to reach a sugar, or transfers the energy.

Masteriza [31]1 year ago

5 0

B ) i think . i rlly dont know srry.

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2 years ago

A 25 liter gas cylinder contains 10 mole of carbon dioxide. Calculate the pressure, in atm, of the gas at 325K.

Arada [10]

Answer: The pressure of carbon dioxide gas is 11 atm

Explanation:

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

PV = nRT

where,

P = pressure of the gas = ?

V = Volume of gas = 25 L

n = number of moles of gas = 10 mole

R = Gas constant = $0.0821\text{ L atm }mol^{-1}K^{-1}$

T = temperature of the gas = 325 K

Putting values in above equation, we get:

$P\times 25L=10mol\times 0.0821\text{ L atm }mol^{-1}K^{-1}\times 325K\\\\P=11atm$

Hence, the pressure of carbon dioxide gas is 11 atm

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2 years ago

Why can't we carry an umbrella during lighting?

sukhopar [10]

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3 years ago

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zvonat [6]

Answer:

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2 years ago

What is the mass of 3.00 moles of magnesium chloride, MgCl2? Express your answer with the appropriate units.

xenn [34]

To find the mass of 3.00 moles of magnesium chloride (MgCl2), first record the atomic mass of magnesium (Mg) and chloride (Cl), which are both listed on the periodic table as follows: Mg=24 g/mole Cl=38 g/mole Now, double the Cl mass since there are 2 Cl moles in MgCl2 and then add it to the Mg mass like so: (38 g/mole*2 moles)+24 g/mole=100 g/mole Finally, to calculate the mass of 3.00 moles of MgCl2, convert the combined atomic mass to grams as follows: 3.00 moles * 100 g/mole = 300 g

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3 years ago