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olga2289 [7]
4 years ago
14

WILL MARK BRAINLIEST!!!!!!

Chemistry
1 answer:
balu736 [363]4 years ago
6 0

Answer:

the last one

Explanation:

when energy slows down/ losing energy it would solidify I think dont take my word

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hydrogen oxygen carbon and nitrogen

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2NaOH+CO2----->Na2CO3+H2O
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Answer:

13.2 g Na2CO3

Explanation:

Convert 10.0 g NaOH to mol.

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Use mol ration given by the equation: 2 mol NaOH to 1 mol Na2CO3

0.250 mol NaOH x 1 mol Na2CO3/2 mol NaOH = 0.125 mol Na2CO3

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Read 2 more answers
1. write the complete chemical symbol for the ion with 14 protons 15 neutrons and 18 electrons
motikmotik

Answer:

1.   Si^{-4}

2.  Co^{+2}

Explanation:

An ion is formed when an atom that is said to be neutral gains or losses electrons.

It is thought that a negative ion (anion) is produced as it gains electrons and a positive ion (cation) is formed when it loses an electron.

Atomic number is the total number of protons and electrons in a neutral atom.

From the information

Protons = 14

electron = 18

Net Charge = no of proton - no of electron

= 14 - 18 = -4

Mass number = 14 + 15 = 29

Thus, the chemical symbol = Si^{-4}

For ion with 27 proton, 32 neutrons and 25 electrons

Net charge = 27 - 25 = +2

Mass number = 27 + 32 = 59

Thus, the chemical symbol = Co^{+2}

6 0
3 years ago
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