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SSSSS [86.1K]
2 years ago
13

Please Help Me

Chemistry
1 answer:
dlinn [17]2 years ago
8 0

Answer:

I think people now are more carefull with trash they throw on the ground and stuff because there more aware of what trashing the earth can do. These days, we have more scientific research on our planet and more people care then back then in 1970, there wasn't a law on littering or on saving the planet, so definetly people are better at keeping the earth clean now days.

Explanation:

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Explain the 4 methods of separating mixtures
jeyben [28]
1) chromatography- separation by inner molecular attractions.

2) distillation- separation by boiling point differences.

3) filtration- separation by particle size

4) crystallization- separation by solubility
8 0
3 years ago
When we mix aqueous solutions of silver nitrate and sodium chloride, a white precipitate of silver chloride forms in the reactio
zloy xaker [14]

Answer:

solid substance formed during liquid solution, is known as precipitate. For example: in the reaction of silver nitrate and sodium chloride, a precipitate of silver chloride is formed which is white in colour. Precipitation can be of any colour like white, yellow, black.

6 0
3 years ago
A gas is sealed in a bottle at 25°C and 1.50 atm pressure. How must the storage conditions be changed to bring the gas to Standa
Degger [83]
We first assume that the gas is an ideal gas so we can use the relation PV= nRT where P is the pressure, V is the volume, n is the number of moles R is the gas constant and T is the temperature. In a closed system, the number of moles should be constant since mass cannot be created or destroyed. So the only thing we can manipulate here is the volume of the system. We do as follows:

PV/T = nR = k
P1V1/T1 = P2V2/T2
V2 = P1V1T2/T1P2
V2 = 1.50 (298.15) V1 / (273.15)(1.0)
V2 = 1.64V1

Therefore, the volume should be changed by a factor of 1.64 of the original volume.
7 0
4 years ago
Can someone help me please
icang [17]
I think it’s either a or b
6 0
3 years ago
Read 2 more answers
True or False. Water is called the universal solvent because it can dissolve all substances.
Pavlova-9 [17]

Answer: That is true my friend.

Explanation:

Maybe not all substances but it can dissolve more than any other liquid.

4 0
4 years ago
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