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3 years ago

What is the mass of ethyl alcohol that fills a 250.0-mL graduated cylinder? The density of ethyl alcohol is 0.789 g/mL.

Chemistry

2 answers:

solong [7]3 years ago

4 0

Answer:

$\boxed {\tt 197.25 \ grams }$

Explanation:

The density formula is:

$d=\frac{m}{v}$

Rearrange the formula for m, the mass. Multiply both sides of the equation by v.

$d*v=\frac{m}{v} *v$

$d*v=m$

Mass can be found by multiplying the density and volume. The density of ethyl alcohol is 0.789 grams per milliliter. The alcohol fills a 250 milliliter graduated cylinder, so the volume is 250 milliliters.

$d= 0.789 \ g/mL \\v= 250 mL$

Substitute the values into the formula.

$0.789 \ g/mL * 250 \ mL=m$

Multiply. Note that the milliliters, or mL will cancel each other out.

$0.789 \ g * 250=m$

$197.25 \ g=m$

The mass of the ethyl alcohol is 197.25 grams.

UNO [17]3 years ago

3 0

Answer: 157.8 g

Explanation: I hope this help my child UwU

What is the weight of the ethyl alcohol that exactly fills a 200.0 mL container the density of ethyl alcohol is 0.789 g ml?

Density review

What is the weight of the ethyl alcohol that exactly fills a 200.0 mL container? The density of ethyl alcohol is 0.789 g/mL.

g = (0.789 g/mL) (200.0 mL) = 158 g

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$\Delta H_{rxn}=[(3\times (-74.8))+(1\times (-393.5))+(4\times (-46.1))]-[(4\times (-22.97))+(2\times (-285.8))]\\\\\Delta H_{rxn}=-138.82kJ$

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