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Mashcka [7]
3 years ago
15

Which contains 3 significant figures.

Chemistry
1 answer:
jolli1 [7]3 years ago
4 0
B, E, F have 3 significant figures
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What is the solution's freezing point: 15 g of CH4N2O (Molar mass = 60.055 g/mol) in 200. g of H2O? (Kf = 1.86 (°C·kg)/mol)
AURORKA [14]

Ok to answer this question we firsst need to fin the number of mol of Urea (CH4N2O). to do this we simply :

1 mol of urea =15/60.055 = 0.25mol

therefore 200g of water contain 0.25mol

the next step is to determine the malality of our solution in 200g of water, to do this we say:

200 g = 1Kg/1000g = 0.2kg

therefor 0.25mol/0.2Kg = 1.25mol/kg

and from the equation:

we know that i = 1

we are given Kf

b is the molality that we just calculated

therefore;

the solutions freezing point is -2.325°C

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1 year ago
How much would a 10 kg suitcase weigh on the surface of…? a. The Moon b. Mars c. Saturn d. Pluto
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2 years ago
What solute particles are present in an aqueous solution of CH3COCH3?
Anuta_ua [19.1K]
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4 0
3 years ago
What is the answer to it
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Is lithium a metal metalloid or non metal
KiRa [710]

Answer:

Metal

Explanation:

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