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stiv31 [10]
3 years ago
15

2. What is the mass of 16.3 L of helium gas?

Chemistry
2 answers:
sashaice [31]3 years ago
7 0

Answer:

mass = 2.91 grams

Explanation:

Base on Avogadro's law, At standard temperature and pressure the molar volume is the same for an ideal gas.  Base on this practical principle the molar volume of gases is 22.4 dm³  per mol.

Since the molar mass of 1 mol of helium is 4.002602, this simply means the molar volume which is 22.4 dm³ = 4.002602.

Convert dm³ to liter ,

1 dm³(cubic decimeter) = 1 liter

22.4 dm³ = 22.4 liter

Therefore,

if 22.4 =  4.002602

16. 3 = mass of the helium gas

cross multiply

mass = 16.3 ×  4.002602/22.4

mass = 65.2424126/22.4

mass = 2.91260770536  grams

mass = 2.91 grams

lilavasa [31]3 years ago
3 0

(16.3 L) / (22.414 L/mol) x (4.0026 g He/mol) = 2.91 g

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What is the pH of a solution that has a [H+] = 0.010 mol/L?
Serjik [45]

Answer:

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2 years ago
The radius of a helium atom is a 31 PM. What is the radius in nanometers?
Paladinen [302]

Answer:

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7 0
3 years ago
A cube of steel with a mass of 150 grams is heated from 60°C to 150°C.
yan [13]

Answer:

1.

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where

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is the change in temperature

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2.

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where

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Cs = 0.900 J/g•°C is the specific heat

is the change in temperature

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4. 42.9 g

The mass of the water sample is given by

where

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is the temperature change

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5. 115.5 J

The heat used to heat the copper is given by:

where

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6. 0.185 J/g•°C

The specific heat of iron is given by:

where

Q = -47 J is the heat released by the iron

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is the change in temperature

Substituting,

Substituting,

Substituting,

Explanation:

8 0
3 years ago
There are 342 g of sucrose in 1.00 mol of sucrose. What is the molar concentration (molarity) of a solution containing 171 g suc
AVprozaik [17]
For the answer to the question above, use these formulas in solving your problem and as a guide.
<span> 
MM = 342 (g/mol) </span>

<span>171 (g) / 342(g/mol) = x mol of sucrose </span>
<span>x moles of sucrose/ 1.25 L =  Molarity of soultion 

</span>I hope I helped you with your problem. Have a beautiful day!
7 0
3 years ago
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