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3 years ago

If you have a gold brick that is 2cm by 3cm by 4cm and has density of 19.3g/cm3, what is its mass?

1 answer:

4 0

Volume = a x a x a

V = 2 cm x 3 cm x 4 cm => 24 cm³

Density = 19.3 g/cm³

Mass = ?

Therefore:

m = D x V

m = 19.3 x 24

m = 463.2 g

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What mass of powdered drink mix is needed to make a 0.5 M solution of 100 mL?

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Answer:

There is 17,114825 g of powdered drink mix needed

Explanation:

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3 years ago

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Draw the structure of 4-methyl-5-oxohexanal.

aniked [119]

Answer:

Explanation:

The structural formula provides more information which is often used to represent a particular organic substance. A structural formula indicates how the atoms are arranged within the molecule of a substance. From the information, the structure of 4-methyl-5-oxohexanal is represented by using a stick formula where the methyl group falls into position 4 and oxygen group falls into position 5 on the hexanal compound.

The structure is provided in the image attached below for better understanding.

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3 years ago

If 42.9 mL of rubbing alcohol is

lisov135 [29]

Answer:

19.8 %

Explanation:

V% = ( V of solute \ 100 ml of solution ) ×100% =

the volume of the solute in 100ml solition = 20 ml

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× ----------- 100 ml solution

42.6 × 100 ml ÷ 215 ml

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the V% = (19.8 ÷ 100) ×100% = 19.8%

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