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Reil [10]
2 years ago
9

Which statement best describes a physical change?

Chemistry
1 answer:
worty [1.4K]2 years ago
3 0

C because it is only the chemical reaction which remain the same

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How many mols of a 3M NaOH solution are in 1L of the solution?
Alex

To calculate this, we need the Molarity formula. This formula tell us that Molarity, which is a concentration unit, is equal to the number of moles divided by the volume. In this question we already have the Molarity and the Volume, so let's build our equation:

C = n/V (You can see Molarity with the letter "C" because it means concentration)

3 = n/1

n = 1 * 3

n = 3 moles of NaOH

6 0
1 year ago
What is all of the living organisms on earth and the places they live in?
romanna [79]

Answer:

Biosphere

Explanation:

The biosphere is the area of Earth where living things exist. The biosphere is divided into regions known as biomes. In general, biomes are areas with a particular type of climate and similar plant and animal species.

8 0
3 years ago
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Rufina [12.5K]

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3 years ago
!!HELP PLS!! A compound sample contains 0.783g of C, 0.196 g of H, 0.521 g 0 and the molecular formula molar mass is 184.27g/mol
Delvig [45]

Answer:

First

divide each element by its Molecular Mass to get their respective moles

Then Divide through by the lowest of the moles

You'll have the ratio of Carbon Hydrogen and Oxygen to be

C2H3O

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C2H3On=184.27

n(12x2 + 1x3 + 16) =184.27

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Pls check if you assigned the correct value to each element

4 0
2 years ago
Is this equation balanced?<br><br>nh4oh+hc2h3o2=nh4c2h3o2+h2o​
Usimov [2.4K]

Answer:

It IS balanced

Explanation:

3 0
3 years ago
Read 2 more answers
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