3 years ago

A conversion factor set up correctly to convert 15 inches to cm is _______.

Chemistry

1 answer:

sleet_krkn [62]3 years ago

6 0

Answer:

e is the correct one , hope I helped u

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4 years ago

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3 years ago

The smallest unit which maintains the physical properties of a compound is a(n) _____.

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Molecule
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4 years ago

an element has a metallic gray appearance. it also has the properties of both a metal and a nonmetal. in which section of the pe

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3 years ago

How many moles of methanol must be added to 4.50 kg of water to lower its freezing point to -11.0 ∘c? for each mole of solute, t

DochEvi [55]

Given:

Mass of solvent water = 4.50 kg

Freezing point of the solution = -11 C

Freezing point depression constant = 1.86 C/m

To determine:

Moles of methanol to be added

Explanation:

The freezing point depression ΔTf is related to the molality m through the constant kf, as follows:

ΔTf = kf*m

where ΔTf = Freezing point of pure solvent (water) - Freezing pt of solution

ΔTf = 0 C - (-11.0 C) = 11.0 C

m = molality = moles of methanol/kg of water = moles of methanol/4.50 kg

11.0 = 1.86 * moles of methanol/4.50

moles of methanol = 26.613 moles

Ans: Thus around 26.6 moles of methanol should be added to 4.50 kg of water.

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4 years ago