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Vladimir [108]
3 years ago
11

The simplest substances on Earth are called ________.

Chemistry
2 answers:
Alex73 [517]3 years ago
6 0
The answer would be elements
Zielflug [23.3K]3 years ago
5 0
The answer is element because there is no two subsances that can make up an element
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Select all the correct answers.
Vlad [161]
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5 0
3 years ago
Necesito ayuda con esto no le entiendo nada
tatyana61 [14]

Answer:

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Explanation:

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3 0
3 years ago
Find Ecell for an electrochemical cell based on the following reaction with [MnO4−]=1.20M, [H+]=1.50M, and [Ag+]=0.0100M. E∘cell
bagirrra123 [75]

Answer:

1.01 V

Explanation:

From Nernst equation;

Ecell= E°cell- 0.0592/n log Q

Where;

Ecell= observed emf of the cell

E°cell= standard emf of the cell

n= number of moles of electrons transferred

Q= reaction quotient

Q= [Ag^+]^3/[MnO4^-] [H^+]^4

Q= [0.01]^3/[1.20] [1.50]^4

Q= 1.65×10^-7

Ecell= 0.88 - 0.0592/3 log 1.65×10^-7

Ecell= 0.88 - [0.0197×(-6.78)]

Ecell= 0.88 + 0.134

Ecell= 1.01 V

5 0
3 years ago
1. A chemical equation representing a physical change is
Marysya12 [62]

Answer:first one is chemical change and the second one is chemical reaction that sh be right.

Explanation:

5 0
4 years ago
Explain how you can use an atoms mass number and atoic number to determine the number of protrons electrons and neutrons in the
VMariaS [17]
Simple!

Atomic number= number of protons AND number of electrons (in an atom)

Mass number= number of neutrons


7 0
4 years ago
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