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2 years ago

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Chemistry

1 answer:

daser333 [38]2 years ago

6 0

Answer:

Here is the answers I got 8 out of 8 correct :D))

Explanation:

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Calculate the molar mass of CH4 gas at STP when 5.46Lof the gas weighs 4g??

meriva

Answer:

About 16.42 grams

Explanation:

$PV=nRT \\\\(1)(5.46L)=n(0.0821)(273) \\\\n\approx 0.2436 \\\\4g/0.2436\approx 16.42$

Hope this helps!

6 0

2 years ago

In the combined gas law, if the volume is decreased, what happens to the temperature if pressure remains constant?

Flura [38]

The correct answer is A. In the combined gas law, if the volume is decreased and the pressure is constant, then the temperature decreases.

P1V1/ T1 = P2V2 / T2

Assume the volume decrease by half; V2 = V1/2

P1V1/ T1 = P2V1 /2 T2

Cancelling terms,

1/T1 = 1/2 T2

T2 = T1/2

Thus, the temperature decreased.

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3 years ago

What is the octet rule?

PolarNik [594]

The Octet rule is a general rule of thumb that applies to most atoms. Basically, it states that every atom wants to have eight valence electrons in its outermost electron shell.

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2 years ago

Read 2 more answers

Calculate the volume of the gas when the pressure of the gas is 1.60 atm at a temperature of 298 K. There are 160. mol of gas in

LekaFEV [45]

Answer:

2445 L

Explanation:

Given:

Pressure = 1.60 atm

Temperature = 298 K

Volume = ?

n = 160 mol

Using ideal gas equation as:

$PV=nRT$

where,

P is the pressure

V is the volume

n is the number of moles

T is the temperature

R is Gas constant having value = 08206 L.atm/K.mol

Applying the equation as:

1.60 atm × V = 160 mol × 0.08206 L.atm/K.mol × 298 K

⇒V = 2445.39 L

Answer to four significant digits, Volume = 2445 L

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3 years ago

How many valence electrons would an element with atomic number 113 have?

marshall27 [118]

How does the law of conservation of mass apply to this reaction: C2H4 + O2 → H2O + CO2?

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2 years ago