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Levart [38]
3 years ago
11

HEEEELLLLPPPP PLS!!! ITS A COLLEGE PLACEMENT TEST

Chemistry
1 answer:
Gre4nikov [31]3 years ago
8 0

Answer:

The percent composition for nitrogen in chromium(III) nitrate is 6%.

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Please help fast!! I need someone to see if my answers are correct! If any are wrong please let me know what the correct answers
marta [7]

Yeah all of them are right :)

4 0
3 years ago
At a certain temperature and pressure, one liter of CO2 gas weighs 1.95 g.
AysviL [449]

Answer:

1.332 g.

Explanation:

  • We can use the general law of ideal gas: <em>PV = nRT.</em>

where, P is the pressure of the gas in atm.

V is the volume of the gas in L.

n is the no. of moles of the gas in mol.

R is the general gas constant,

T is the temperature of the gas in K.

  • At the same T and P and constant V (1.0 L), different gases have the same no. of moles (n):

<em>∴ (n) of CO₂ = (n) of C₂H₆</em>

<em></em>

∵ n = mass/molar mass

<em>∴ (mass/molar mass) of CO₂ = (mass/molar mass) of C₂H₆</em>

mass of CO₂ = 1.95 g, molar mass of CO₂ = 44.01 g/mol.

mass of C₂H₆ = ??? g, molar mass of C₂H₆ = 30.07 g/mol.

<em>∴ mass of C₂H₆ = [(mass/molar mass) of CO₂]*(molar mass) of C₂H₆</em> = [(1.95 g / 44.01 g/mol)] * (30.07 g/mol) =<em> 1.332 g.</em>

<em></em>

7 0
4 years ago
What is the frequency of individuals with doctorates work in the field of physical science
Ghella [55]

Answer:

B) 1000-2000

Explanation:

uwu

5 0
4 years ago
Read 2 more answers
The equal areas law is Keplers 2nd law of motion of planetary motion. It states that _____
seraphim [82]

An imaginary line joining a planet and the sun sweeps out an equal area of space in equal amounts of time. Thus, the speed of the planet increases as it nears the sun and decreases as it recedes from the sun.

6 0
3 years ago
Read 2 more answers
Joshua dissolved sugar in water to create a sugar solution. His friend Ray tells him it’s a compound, but Joshua corrects him. W
Lady_Fox [76]

the sugar disolved into the water so its a <u>mixture</u>. boom those words are it


5 0
3 years ago
Read 2 more answers
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