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AlekseyPX
2 years ago
12

A beaker contains 500 ml of 2.40M KNO3 the beaker is left uncovered so that all of the water evaporates. What mass of KNO3 cryst

als will remain in the beaker when the beaker is dry.
Chemistry
1 answer:
telo118 [61]2 years ago
6 0

Answer:

242.4 g

Explanation:

RAM of KNO3=39+14+(16×3)=101

Mass=morality×RAM

101*2.4=242.4

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I don't need to know why i just want the awnser
Lubov Fominskaja [6]

Answer:

I remember doing this in 7th,

1. D

2. B or D, more leaning on B though

3. A

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3 years ago
Which water cycle processes might be responsible for helping to clean/ filter the water? Explain.
Leya [2.2K]

to be as exact as i can it is all of them they all work together to make water good.


7 0
3 years ago
When an object is lifted 6 meters off the ground, it gains a certain amount of potential energy. If the same object is lifted 18
AlexFokin [52]

Answer:

The answer to your question is the letter C. three times as much

Explanation:

Data

First step = 6 m

Second step = 18 m

Potential energy is the energy stored that depends on its position.

Formula

Pe = mgh

m = mass; g = gravity; h = height

Potential energy of the first step

        Pe1 = 6mg

Potential energy of the second step

        Pe2 = 18mg

-Divide the Pe2 by the Pe1

        Pe2/Pe1 = 18mg/6mg

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7 0
2 years ago
How many atoms of hydrogen are in 170 g of hydrogen peroxide (h2o2)?
Ede4ka [16]

I am pretty sure the answer is 1.5*10^25
5 0
3 years ago
Which of the following observations NOT likely describes a chemical change? a A white solid was exposed to ultraviolet light and
kiruha [24]

Answer:

The correct answer would be - c.  A solid was added to water and the mixture was stirred until the solid was no longer visible

Explanation:

Photostabalizing is the process where a solid change its color in the presence of ultraviolet light, it is a chemical change, so the first option would not be the correct answer.

when two liquid or aqueous solutions are mixed together and form a solid substance, this reaction is known as precipitation and it is a chemical reaction too.

When a solid is placed in a liquid and after stirring it makes the solid vanish is a physical change known as dissolving character.

Thus, the correct answer is option C.

7 0
2 years ago
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