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Ierofanga [76]
4 years ago
13

How does the number of electrons relate to an element's atomic number? Why?

Chemistry
2 answers:
RSB [31]4 years ago
8 0
The number of protons in the nucleus of the atom is equal to the atomic number. The number of electrons in a neutral atom is equal to the number of protons. The mass number of the atom is equal to the sum of the number of protons and neutrons in the nucleus.
Hope it helped
Shalnov [3]4 years ago
4 0

The number of electrons equals the number of protons in a neutral atom (ie something that isn't an ion), and in turn the number of protons determine the atomic number (and therefore its chemical identity).

If we're talking about ions then the number of electrons does not match up with the atomic number. For example, the potassium ion K^{+} has 18 electrons. It lost an electron which gives it a charge of +1, yet it's proton count is 19 and so is the atomic number.

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How many grams are in 0.5 moles of CO2?
pentagon [3]

Answer:

0.5 mole CO2=0. 5×44=22 gm.

4 0
3 years ago
Use the drop-down menus to identify the class of compounds to which each structure belongs.
inna [77]

Answer:

1) carboxylic acid

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Explanation:

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3 0
3 years ago
What is the percent composition in chloric acid (HClO3)?
Nuetrik [128]
Total weight = 1 + 35.45 + 3 * 16 = 84.45

H = 1 / 84.45 * 100% = 1.18%
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7 0
3 years ago
Backpackers often use canisters of white gas to fuel a cooking stove’s burner. If one canister contains 1.45 L of white gas, and
rusak2 [61]
1 L ------- 1000 cm³
1.45 L ----- ???

1.45 * 1000 = 1450 cm³  ( volume ) 

Density = 0.710 g/cm³

mass =  in Kg 

m = D * V

m = 0.710  * 1450

m = 1029.5 g

1 Kg ------- 1000 g
   kg -------- 1029.5 g

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hope this helps!

7 0
3 years ago
HURRY! 10 POINTS!!
frosja888 [35]

Answer:

Weak bonds require less energy to form than strong bonds

Explanation:

According to Coulomb's law, the force between two species is inversely proportional to the distance between them. That said, the bigger the atoms are, the greater the bond length should be to form a molecule.

As a result, for a greater bond length, the attraction force is lower than for a shorter bond length. This implies that large atoms would form weak bonds and small atoms would form strong bonds.

Bond energy is defined as the amount of energy required to break the bond. If a bond is weak, it would require a low amount of energy to break it. This is also true for energy of formation, as it's the same process taking place in the opposite direction.

6 0
4 years ago
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