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inn [45]
3 years ago
5

Which layer of the ocean is the least dense?

Chemistry
1 answer:
nlexa [21]3 years ago
4 0

Answer:

the deep ocean

Explanation:

goog   le

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Diminish reliance on foreign sources of oil

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Which of the following is an example of convection?
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3 years ago
How many kilograms are in 4 moles of Na2CO3?
castortr0y [4]
First you need to find the amount of mass of Na2CO3 in one moles
(Use periodic chart)

Na= 22.99 x 2 = 45.98
C = 12.01
O = 16.00 x 4 = 64.00

Add the molar masses together to get 121.99

To find how many grams are in 4 moles, times 121.99 by 4
This gives you 487.96

But the questions asks for the answer to be in kilograms nor grams, to change into kilograms divide by 1000
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6 0
3 years ago
A gas has a pressure of 810 kPa at 227°C. What will its pressure be at 27°C?
NeX [460]

486 kPa will be the pressure of gas at 27 degrees.

Explanation:

Data given :

Initial pressure of the gas P1 = 810 kPa

initial temperature of the gas T1 = 227 degrees OR 500.15 K

final pressure of the gas =?

final temperature of the gas = 27 degrees OR 300.15 K

Gay Lussac's law is used to calculate the pressure of the gas at 27 degrees or 300.15 K

\frac{P1}{T1} = \frac{P2}{T2}

P2 = \frac{P1T2}{T1}

 Putting the values in the equation:

P2 = \frac{810 X 300.15}{500.15}

P2 = 486 KPa

486 Kpa is the pressure of the gas when temperature was reduced to 27 degrees.

5 0
3 years ago
A chemist is studying an unknown substance. He can break it into its elemental components only by using chemical means. Based on
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The correct option is D.

In chemistry, a pure substance refers to a matter that possesses definite and constant composition with unique chemical properties. Another word for a pure substance is chemical substance. A pure substance typically contains only one type of atom or only one type of molecule. Examples of pure substances are water, sodium chloride, gold, silver, etc. In the question given above, we are told that the unknown element can only be broken down by chemical mean, this shows that the unknown compound is a chemical compound.

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3 years ago
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