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stiks02 [169]
2 years ago
7

This quiz gonna kill me please help

Chemistry
2 answers:
Sauron [17]2 years ago
7 0

Explanation:

cro ro rvdhfrodj jhpjbcdhjcjcdosjd

Pie2 years ago
7 0

Answer:

Periodic table of elements

Explanation:

I am so sorry I can't help you out.

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Gelneren [198K]

Answer:

im positive that it's 19

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3. Matter with a composition that is always the same is a(n)<br> substance<br> mixture<br> compound
Andre45 [30]

Answer:

substance

Explanation:

A pure substance is a form of matter that has a constant composition (meaning it's the same everywhere) and properties that are constant throughout the sample (meaning there is only one set of properties such as melting point, color, boiling point, etc

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3 years ago
Whats is a chemical change of a paper bag
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Combustion will cause a chemical change in paper.

This is because the carbon compounds are being oxidized into carbon dioxide and water vapour (or h2o, same thing).



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3 years ago
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3 years ago
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Based on the activity series, which one of the reactions below will occur (Spontaneous)? A. Mn (s) + NiCl2 (aq) → MnCl2 (aq) + N
kap26 [50]

Answer:

Mn (s) + NiCl2 (aq) → MnCl2 (aq) + Ni

Explanation:

The order of displacement of metals from aqueous solution by another metal is defined by the activity series of metals.

The activity series arranges metals in order of reactivity and increasing electrode potentials. The less negative the electrode potential of a metal is, the less reactive it is and the lower it is found in the activity series.

Nickel has a less negative electrode potential than manganese hence it is displaced from an aqueous solution of its salt by manganese spontaneously.

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