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3 years ago

What is the pressure, in atm, of 24.5 L of ideal gas at 247.8 K if there are 1.8 moles present?

Chemistry

1 answer:

Flura [38]3 years ago

8 0

Answer:

p = 1.5 atm

Explanation:

pV = nRT

p = nRT/V = [1.8 mol×(0.082 atm L/mol K)×247.8 K]/24.5 L

p = 1.5 atm

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What volume in milliliters of 0.0130 M Ca(OH)₂ is required to neutralize 75.0 mL of 0.0300 M HCl?

Orlov [11]

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Shawty's like a melody in my head
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That girl, is a dime they say (Hey)
That girl, is a gun to my holster
She's running through my mind all day, ay
Shawty's like a melody in my head
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It's like my iPod's stuck on replay
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Oh, girl, I could write you a symphony
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Now she got me singin'
Shawty's like a melody in my head
That I can't keep out, got me singin' like
Na na na na everyday
It's like my iPod's stuck on replay
Replay-ay-ay-ay
Shawty's like a melody in my head
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8 0

3 years ago

If an atom’s mass number is 210 and its atomic number is 85, how many neutrons does it have?

Nadya [2.5K]

Mass number is the total number of Protons and Neutrons. Simply subtract 85 from 210. 210-85=125 neutrons

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3 years ago

1. Fossil fuels are

marta [7]

1) A
2) C
3) C
4) B
5) A

5 0

4 years ago

Can youguys helpplease its for marks and is due tommorow.

Soloha48 [4]

Explanation:

i believe this is right. my bad if its not

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3 years ago

Two iron oxide samples are given to you where one is red and the other is black. You perform a chemical analysis and you find th

kupik [55]

Answer:

Chemical formula for the black iron oxide sample is FeO

Explanation:

Given:

Mass ratio of black iron oxide sample, Fe/O = 3.491

To determine:

The chemical formula

Calculation:

The mass ratio is Fe:O = 3.491 : 1

Mass of Fe = 3.491 g

Mass of O = 1.000 g

Atomic mass of Fe =55.85 g/mol

Atomic mass of O = 16.00 g/mol

$Moles\ Fe = \frac{3.491g}{55.85g/mol} =0.625\\\\Moles\ O = \frac{1.000g}{16.00g/mol} =0.0625\\$

Therefore, the molar ratio of Fe:O = 1:1

Hence, chemical formula is FeO

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4 years ago