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a_sh-v [17]
3 years ago
6

What are the two types of pure substances? Give definitions for each.

Chemistry
2 answers:
KengaRu [80]3 years ago
6 0
Substance that is not mixed with anything is considered pure.
BabaBlast [244]3 years ago
3 0
Water and dimond are the 2 pure substances
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BRAINLIESTTTT ASAP!!! PLEASE HELP ME :)
melomori [17]

Answer:

Double replacement

Precipitation reaction

Explanation:

You have the reaction:

         REACTANTS                          PRODUCTS

BaCl₂ (aq) + Na₂SO₄ (aq) ⇒ 2NaCl (aq) + BaSO₄(s)

The general form of a double replacement reaction is the following:

AB + CD ⇒ CD + AB

The reactants basically, exchanged partners. In the case of your problem, Barium(Ba) and Sodium(Na) switched places. So this makes it a double-replacement reaction.

Now how do I know it is a precipitation reaction. A precipitation reaction occurs when two solutions combine and salt is formed. Salt is solid, so how do I know that's what occured? Look at your equation again:

BaCl₂ (aq) + Na₂SO₄ (aq) ⇒ 2NaCl (aq) + BaSO₄(s)

aq means aqueous (liquid)

s means solid

If you look at the product formed in the reaction, from two solutions, it formed a solid. So this is your clue as to why it is a precipitation reaction.

3 0
3 years ago
The compound HA is an acid that is soluble in water which of the beakers in the picture shows HA behaving as a weak acid in wate
lesya692 [45]
HA is a weak acid so there should be little amount of HA and then H+ and A- in the beaker so the last one is true a weak acid never converts completely to H+ and A-
6 0
3 years ago
(PLEASE ANSWER + BRAINLIEST !!)
MatroZZZ [7]
A gamma ray has a mass and atomic number of 0 meaning it doesn’t effect the nucleus.
E.g
60 60 0
Co —> Co + gamma ray
27 27 0

7 0
3 years ago
What is the relationship between the distance between objects and the gravitational force between them
Leokris [45]

Answer: the gravitational pull decreases as the object's distance increases

Explanation:

3 0
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IceJOKER [234]

Answer:

— Washing with soap and water is an effective way to destroy and dislodge many microbes

Explanation:

  1. Soap actually kill germs on our hands, it breaks them up and removes them
  2. .But soap molecules have two different ends to them.
  3. One end is attracted to water molecules – this is called hydrophilic
  4. – and the other end loves oil and fat molecules – this is called hydrophobic.
  5. Soap is able to bind to the oils on our hands, and then mix with the water to wash all the germs away.
4 0
2 years ago
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