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Lorico [155]
3 years ago
7

Which one is NOT true about chemical changes? *

Chemistry
2 answers:
sukhopar [10]3 years ago
6 0

Answer:

The second answer

Explanation:

Phase changes is an example of physical change because it only changes the substance's appearance.

Natali5045456 [20]3 years ago
3 0

Answer: 1 and 4 are the answers

Explanation: because when you mix a sub since and it will have a chemical change

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If a mixture looks smooth and the same throughout it is probably what
gulaghasi [49]
Answer:
             <span>If a mixture looks smooth and the same throughout it is probably <u>Homogeneous</u>.

Explanation:
                   Mixture is the combination of different compounds which are unreactive to each other.

Mixture are classified as ...

Solutions; in which the mixed compounds are thoroughly mixed and cannot be distinguished from each other and are said to be homogeneous. In solutions the size of solute is very small (i.e. Less than 1 nm).

Colloids; in which the solute is homogeneous visually but heterogeneous microscopically. The size of particles in this case is between 1 nm to 1 </span>μm.

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4 0
4 years ago
Why is the metric system the preferred system of measurement for science
Nikolay [14]
In is a lot easier because it uses 10s.
3 0
4 years ago
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How many grams of chlorine gas can be produced when 50.0 grams of aluminum chloride decompose? 2AlCl3→ 2Al + 3Cl2
lianna [129]

Answer:

Explanation:

Approx.

425

⋅

g

Explanation:

2

A

l

(

s

)

+

3

C

l

2

(

g

)

→

2

A

l

C

l

3

(

s

)

You have given a stoichiometrically balanced equation, so bravo.

The equation explicitly tells us that

54

⋅

g

of aluminum metal reacts with

6

×

35.45

⋅

g

C

l

2

gas to give

266.7

⋅

g

of

aluminum trichloride

hope this helps

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3 years ago
How many Joules of energy in 3565 calories? <br> Explain
nignag [31]

Answer:

14915960J

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brendatferreira  answered it on another slide this person said they used a converter

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When combined with alcohol some over the counter drugs can:
Marianna [84]

Can cause a chemacal reaction

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