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3 years ago

12

Which property is NOT used to separate a mixture?

1 answer:

NeTakaya3 years ago

6 0

Answer: ability to undergo a chemical reaction

Explanation:

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If the compound has a molar mass of 156 g/mol, what is its molecular formula?

oksano4ka [1.4K]

I believe that the choices for this question are:
C2H4O2, C4H8O4 CH2O, C6H12O6 C3H6O3, C6H12O6 C2H4O2, C6H12O6

The answer to this based on the molar masses given is:
C2H4O2, C6H12O6

To prove calculate the molar mass:
C2H4O2 = 2*12 + 4*1 + 2*16 = 60
C6H12O6 = 6*12 + 12*1 + 6*16 = 180

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3 years ago

A pharmacist wishes to strengthen a mixture from 10%alcohol to 30% alcohol. How much pure alcohol should be added to 7 liters of

Tomtit [17]

Answer:

2 litres of pure alcohol will be added to make the overall concentration of 9 litres of mixture as 30%.

Explanation:

Suppose x is the number of litres added to the 10% mixture than the quantity of new mixture is given as below

$n_{old}=7$ litres
$n_{new}=7+x$ litres

Also the quantity of alcohol is given as

$q_{old}=10 \% \, of \, 7 \, litres =0.7$

$q_{added}=x$

$q_{new}= 30 \% \,of \,new\, quantity = 0.3(7+x)$

Now the equation is as

$q_{old}+q_{added}=q_{new}\\0.7+x=0.3(7+x)\\0.7+x=2.1+0.3x\\x-0.3x=2.1-0.7\\0.7x=1.4\\x=2 \, litres$

So 2 litres of pure alcohol will be added to make the overall concentration of 9 litres of mixture as 30%.

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3 years ago

Differentiated cells will first organize themselves into ________

ziro4ka [17]

It's TISSUES.
CELLS, TISSUES, ORGANS, ORGAN SYSTEM, NEW ORGANISM

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3 years ago

we know from Newton’s 2nd Law of Motion that the force on an object is equal to the mass of the object times the acceleration of

ANTONII [103]

The acceleration of the ball was 0.6 m·s⁻².

<em>F = ma</em>

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Answer:

A B C D E

Explanation:

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3 years ago