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Ilia_Sergeevich [38]
3 years ago
11

Help :L

Chemistry
2 answers:
jok3333 [9.3K]3 years ago
5 0

Answer:

1.6 g/cm3

Explanation:

The formula for Density is actually D=m/v

m= 12.9g

v= 8 cm3

D= \frac{12.9}{8} =1.6125

The unit is grams per centimeters cubed or g/cm3

(If you use the formula given in the question it would be D=0.62)

katen-ka-za [31]3 years ago
5 0

Answer:

1.6 g/cm3

just had this question

Explanation:

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3 years ago
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Calculate the % composition of the unknown liquid using your most precise result. It is a mixture of ethanol (D[ETOH] = 0.7890 g
Rufina [12.5K]

% composition of ethanol = 34.51%

% composition of water  = 65.49%

<h3>What is density?</h3>

A material's density is defined as its mass per unit volume.

Given data:

The density of ethanol = 0.7890 g/mL

The density of water = 0.9982 g/mL

The density of mixture = 0.926 g/mL

Let the % composition of ethanol = x

Let the % composition of water = 100-x

Now density of the mixture

\frac{Mass}{Volume}

Mass = \frac{percent  \;of  \;ethanol  \;X  \;density  \;of  \;ethanol  \;+  \\ \;percent  \;of  \;water X  \;density  \;of  \;water}{100}

0.926 = \frac{x X  0.7890 g/mL  \;+  (100-x) X  0.9982 g/mL}{100}

x= 34.51 %

Hence,

% composition of ethanol = 34.51%

% composition of water = 65.49%

Learn more about the density here:

brainly.com/question/952755

#SPJ1

8 0
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The arrangement of orbitals in order of increasing energy is shown in the answer above.

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