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Radda [10]
3 years ago
9

What is the only true way to tell if a chemical reaction has occurred? CFU

Chemistry
1 answer:
Murljashka [212]3 years ago
3 0

Answer:

change of colour

Explanation:

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Why are atomic masses on the Periodic Table written in decimals when they are based on mass numbers that can be whole numbers?
Dmitry_Shevchenko [17]
To allow for equations and problems in chemistry to be as precise as possible. When experiments are conducted, and even if the number is the slightest bit off, the problem or experiment could be impacted very negatively. It allows for complete accuracy to ensure nothing goes wrong, since chemistry is very touchy and risky when dealing with extremely unsafe elements.
8 0
2 years ago
How many elements does a compound need to form?
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Answer:

two

Explanation:

When two distinct elements are chemically combined, chemical bonds form between their atoms. the result is called a chemical compound

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3 years ago
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What type of solvent would be required to dissolve nonpolar compounds?
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For example, ionic compounds, which are very polar, are often soluble in the polar solvent water. Nonpolar substances are likely to dissolve in nonpolar solvents. For example, nonpolar molecular substances are likely to dissolve in hexane, a common nonpolar solvent.
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1 year ago
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Which of these equations is balanced? a. H2SO4 + 2Al → Al2(SO4)3 + H2 b. 2KCl + Pb(NO3)2 → 2KNO3 + PbCl2
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The answer is B, you just check if it is the same on the left and right side

A:
Left side - Right side
2xH - 2xH
1xS - 3xS
4xO - 12xO
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Therefore A is not correct

B:
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2xK - 2xK
1xCl - 1xCl
1xPb - 1xPb
2xN - 2xN
6xO - 6xO

B is therefore correct as both sides add up
6 0
3 years ago
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Which of the following is the best comparison of the density of basalt and granite? Basalt is more dense than granite Granite is
LUCKY_DIMON [66]
Basalt is more dense than granite because granite is made of lighter mass.
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3 years ago
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