3 years ago

After Pangaea broke up, North America became part of what?

Chemistry

1 answer:

ryzh [129]3 years ago

3 0

What do you mean? After Pangaea broke up North America began to drift towards is present day location.

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13. An aerosol spray can of deodorant with a volume of 0.410 L contains 3.0 g of propane gas (CH3) as propellant. What is the pr

qaws [65]

Answer: The pressure in the can is 4.0 atm

Explanation:

According to ideal gas equation:

$PV=nRT$

P = pressure of gas = ?

V = Volume of gas = 0.410 L

n = number of moles = $\frac{\text {given mass}}{\text {Molar mass}}=\frac{3.0g}{44.1g/mol}=0.068mol$

R = gas constant = $0.0821Latm/Kmol$

T =temperature = $20^0C=(20+273)K=293K$

$P=\frac{nRT}{V}$

$P=\frac0.068mol\times 0.0820 L atm/K mol\times 293K}{0.410L}=4.0atm$

Thus the pressure in the can is 4.0 atm

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3 years ago

What is the name for CH3-CH2-CH2-O-CH2-CH3?

BabaBlast [244]

Answer:

idk maybe chlorine 12

Explanation:

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3 years ago

What is the molarity of a 0.25-liter solution containing 52 grams of HBr? (1 point)

Pani-rosa [81]

2.6 M hBr

This would be the correct answer.

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3 years ago

Why metals are denser than non - metals ? ...?

Solnce55 [7]

Because their molecules are more tightly packed. Massdensity = ---------- Volume
So more densely packed molecules means more mass per unit volume. Hence metals are denser than non-metals.

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3 years ago

Soils that allow water to pass through them faster are more _______.

siniylev [52]

I would say C. Permable

Google def.(of a material or membrane) allowing liquids or gases to pass through it.
"a frog's skin is permeable to water

Porous- (of a rock or other material) having minute spaces or holes through which liquid or air may pass

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3 years ago

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