Help with my science

Chemistry

2 answers:

arsen [322]3 years ago

6 0

What’s the question or picture

Vlad1618 [11]3 years ago

3 0

I'd love to help, but you forgot to add the question.

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A cubic container is filled up with an unknown liquid whose density is 0.180 g/cm3. The side lengh of the container is 5.00cm. W

Romashka-Z-Leto [24]

Answer:

22.5

Explanation:

M=D*V

V=5*5*5=125

M=0.180*125= 22.5

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2 years ago

How many moles of solute would be dissolved in .500 kg of solvent to make a 2.50 molal NaOH solution?

Tom [10]

Molality is a measure of concentration that relates the moles of solute to the kilograms of solvent, it is described by the following equation:

$Molality=\frac{molSolute}{kgSolvent}$

We are given the molality(2.50m) and kilograms of solvent(0.500kg), so we solve for moles of solute from the equation:

$molSolute=Molality\times kgSolvent$ $\begin{gathered} molSolute=2.50m\times0.500kg \\ molSolute=1.25molSolute \end{gathered}$

To make a 2.50molal NaOH solution would be needed 1.25moles of solute

Answer: 1.25 moles

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11 months ago

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Rzqust [24]

Answer:

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2 years ago

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How many moles of oxygen are produced when 29.2 g of water is decomposed according to H20 H2 + O2

Katarina [22]

8.1moles

Explanation:

Given parameters:

Mass of water to be decomposed = 29.2g

Unknown:

Number of moles of oxygen.

Solution: