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k0ka [10]
3 years ago
9

What is the number of orbit for calcium

Chemistry
1 answer:
CaHeK987 [17]3 years ago
7 0
It has 20 electrons
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How many nickel atoms are in a nickel coin with a mass of 3.95g
lyudmila [28]

Answer:

4.05 × 10²² atoms

Explanation:

Step 1: Given data

Mass of nickel: 3.95 g

Step 2: Calculate the moles corresponding to 3.95 g of nickel

The molar mass of nickel is 58.69 g/mol.

3.95 g × (1 mol/58.69 g) = 0.0673 mol

Step 3: Calculate the atoms in 0.0673 moles of nickel

We will use Avogadro's number: there are 6.02 × 10²³ atoms of nickel in 1 mole of atoms of nickel.

0.0673 mol × (6.02 × 10²³ atoms/1 mol) = 4.05 × 10²² atoms

5 0
3 years ago
The accepted value for R is 0.08206 L·atm/K·mol or 8.314 L·kPa/K·mol, depending on the unit of pressure used. (Your answer may d
Alecsey [184]

Answer:

poop

Explanation:

8 0
3 years ago
How can heat change matter from a solid to a liquid to a gas?<br> Help ima mark Brainlyest!!
babymother [125]
The heat energy breaks down the bonds between the molecules of the solid so the molecules become looser. Further hearing of the liquid causes the bonds to be broken down and the molecules will move further apart.
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3 years ago
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What is the name of the compound N2(g)
zavuch27 [327]
N2 stands for nitrogen.
                             this compound also includes the exact mass.
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7 0
3 years ago
Oxidation number of sulphur in H2SO4
DochEvi [55]

Answer

let the oxidation of sulphur is x

2(+1)+x+4(-2)=0

+2+x-8=0

+2-8+x=0

-6+x=0

x=6

Explanation:

i hope this will help you:)

8 0
3 years ago
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