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2 years ago

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If 655j are added to ethanol (grain alcohol) and its temperature rises from 18.2 C to 32.8 C, what is the mass of the ethanol sa

mple?

1 answer:

WARRIOR [948]2 years ago

5 0

G= 6.96 kcal/g is the answer to the question

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I wrote that all matter consists of tiny particles called atoms. I also thought all atoms of a specific

Westkost [7]

Answer:

John Dalton

Explanation:

John Dalton in 1808 suggested that all matter consists of tiny particles called atoms and that the atoms of a specific element are identical.

He postulated the Dalton's atomic theory which has the following important parts;

All matters consists of indivisible particles called atoms
Atoms of the same element are similar and are different from atoms of other elements.
Atoms can neither be created nor destroyed.
Atoms combine in simple whole ratios to form compounds.

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2 years ago

Can anyone fill in the answers?

Arte-miy333 [17]

Hi, P.S. The atomic number will always be the same as the number of protons...

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2 years ago

What coefficient values will balance the reaction shown? CS2 + Cl2? CCl4 + S2Cl2 A. 1,1,1,1 B. 1,3,1,1 C. 2,1,1,1 D. 1,2,1,2

Talja [164]

The answer is B. 1,3,1,1.

Brady

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2 years ago

To interconvert the concentration units molality (m) and mass percent, you must also know the density of the solution. A) True B

uranmaximum [27]

Answer:

The correct answer is option false.

Explanation:

Molality of the solution defined as moles of substance present in 1 kilogram of solvent.

Moles = $\frac{Mass of solute}}{\text{molar mass of solute}}$

$Molality=\frac{Moles}{\text{Mass of solvent(kg)}}$

Mass of percent (w/w%) of the solution is defined as amount of solute present in 100 grams of solution.

$(w/w\%)_=\frac{\text{Mass of solute}}{\text{Mass of solution}}\times 100$

So, if want to inter-convert molality into mass percent we can do that without knowing density of solution.

Mass of solution = Mass of solute + Mass of solvent

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2 years ago

What is the final concentration if a 50.0 mL sample of a 15% H2SO4 solution is added to water to give a final volume of 250 mL?

mrs_skeptik [129]

Answer: um it's 3%H2SO4

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2 years ago