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Varvara68 [4.7K]
3 years ago
14

Which of these statements is true?

Chemistry
2 answers:
frozen [14]3 years ago
6 0
I think that it is B. because the others are most likely not true.
shepuryov [24]3 years ago
3 0
The answer would be B because you know that it is the most consistently true statement.
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What is the pressure of a sample of gas at a volume of .335 L if it occupies 1700 mL at 850 mm Hg?
dangina [55]

Answer:

Pressure = 4313.43mmHg

Explanation:

P1 = ?

V1 = 0.335L

V2 = 1700mL =1700*10^-3L = 1.7L

P2 = 850mmhg

From Boyle's law, the volume of a fixed mass of gas is inversely proportional to its pressure provided that temperature remains constant.

P = k / v

K = pv. P1V1 = P2V2 = P3V3 =........=PnVn

P1V1 = P2V2

Solve for P1,

P1 = (P2*V2) / V1

P1 = (850 * 1.7) / 0.335

P1 = 4313.43mmHg

The pressure of the gas was 4313.43mmHg

7 0
3 years ago
Sucrose is a non volatile, non-ionizing solute in water.
Natasha2012 [34]
When a non volatile solute is added to a solvent, the vapor pressure of the solvent will decrease.

 Vapor pressure is a colligative property. Which means that it will be affected by the number of particles of solute.

The relationship between the concentration of the solute and the vapor pressure is given by Roult's Law

ΔP = Xsolute * P, where ΔP is vapor pressure lowering, Xsolute is the molar fractionof the solute, and P is the vapor pressure of the solvent.

Then lets find Xsolute

X solute = # moles solute / # moles solution

# moles solute = 75.0 grams / molar mass

molar mass of C12H22O11 = 12*12g/mol + 22*1g/mol + 11*16g/mol = 342 g/mol

# moles solute = 75.0/342 mol = 0.219 mol

# moles of solvent = grams of solvent / molar mass of solvent

# moles of solvent = 180 grams /18 g/mol = 10 mols

Xsolute = 0.219 mol solute / (10 + 0.219) mol solution =0.0215

ΔP = 0.0215*26.7 torr = 0.57 torr

Answer= 0.57 torr

7 0
3 years ago
Kichi made a table to identify where she might find acids and bases in her house based on their common uses.
sineoko [7]

The answer is: Ammonium hydroxide would be found in the pantry because it is found in vinegar.

Ammonim hydroxide (NH₄OH) is base and vinegar is acid.

pH of ammonium hydroxide is greater than 7 and vinegar has pH less than 7.

Ammonium hydroxide is a smelling, colorless liquid.

It is used as cleaning product, disinfectants and stain treaters.

Household ammonia contains 5-10% ammonium hydroxide.

5 0
3 years ago
Read 2 more answers
If you pump air into cycle tyre a slight warming effect is noticed at valve stem why
SSSSS [86.1K]
Probably the kinetic energy of rubbing the pump against the valve, combined with the increase in gas pressure in the tire itself.
8 0
3 years ago
Methanol is the simplest alcohol. How are larger alcohol molecules formed?
bazaltina [42]

Answer:

Methanol, also known as methyl alcohol amongst other names, is a chemical with the formula CH₃OH. It is a light, volatile, colourless, flammable liquid with a distinctive alcoholic odour similar to that of ethanol.

Explanation:

7 0
3 years ago
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