2 years ago

Help me with this please !! It’s very important!!

Chemistry

1 answer:

Natali5045456 [20]2 years ago

4 0

I think the answer is either the first or the last

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A flask with a volume of 3.16 l contains 9.33 grams of an unknown gas at 32.0°c and 1.00 atm. What is the molar mass of the gas?

Inessa05 [86]

Answer:

73.88 g/mol

Explanation:

For this question we have to keep in mind that the unknown substance is a gas, therefore we can use the ideal gas law:

$PV=nRT$

In this case we will have:

P= 1 atm

V= 3.16 L

T = 32 ªC = 305.15 ºK

R= 0.082 $\frac{atm*L}{mol*K}$

n= ?

So, we can solve for "n" (moles):

$1~atm*3.16~L~=~n*0.082~\frac{atm*L}{mol*K}*305.15~K$

$n=\frac{1~atm*3.16~L~}{0.082~\frac{atm*L}{mol*K}*305.15~K}$

$n=0.126~mol$

Now, we have to remember that the molar mass value has "g/mol" units. We already have the grams (9.33 g), so we have to divide by the moles:

$molar~mass=\frac{9.33~grams}{0.126~mol}$

$molar~mass=73.88\frac{grams}{mol}$

7 0

3 years ago

Why does sublimation feel cold?

Gala2k [10]

Cause it felt like being cold

7 0

3 years ago

Help help help help help

dimaraw [331]

Answer:

neon gas

Explanation:

neon is a noble gas, meaning it has a full outer shell of elections. this means it is stable and is very unlikely to have a reaction with another substance.

7 0

2 years ago

Why do you think the older scientist disregarded the younger scientist's prediction?

Svetach [21]

Answer:

The older scientist were ignorant

Explanation:

they thought that they were better than the younger scientist. to put it in simply they were ignorant to think younger is worse

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2 years ago

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Convert the following to Celsius 16) 100° K 17) 200° K 18) 273° K 19) 350ºK

Mnenie [13.5K]

Answer:

OH really

Explanation:

Sorry for that

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2 years ago