The concept that all matter is made of tiny particles in constant motion is called?

Chemistry

1 answer:

Svet_ta [14]3 years ago

6 0

Answer:

kinetic theory

Explanation:

The concept that all matter is made of tiny particles in constant motion is called the Kinetic Theory

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What is the empirical formula of a substance that is 53.5% C, 15.5% H, 31.1% N?

KengaRu [80]

For each carbon, hydrogen and nitrogen. You have to divide each percentage by its atomic mass.
C = 53.5/12.0107 = 4.45436
H = 15.5/1.00794 = 15.377899
N= 31.1/14.0067 = 2.220365

Round the number to significant figures
C = 4.45
H =15.4
N =2.22

Divide Each Number by the smallest number out of the three
so N = 2.22/2.22 =1
H = 15.4/2.22= 6.9 =7
C = 4.45/2.22= 2
So the Formula Should Be <span>C2H7N</span>

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Tresset [83]

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3 years ago

How many fluorine atoms are present in 5.71 g of C2F4? Please explain in steps!

Leya [2.2K]

Molar mass of C= 12g/mol
2C= 2*12g/mol= 24g/mol
Molar Mass of F=19g/mol
4F= 4*19g/mol= 76g/mol
Total molar mass of C2F4 = (24g/mol+76g/mol)= 100g/mol

Now you need to find the moles of Fluorine
Moles= Mass/molar mass
Moles of Fluorine = 5.71g/100g/mol=0.0571mol of Fluorine

To find the number of atoms you multiply moles by Avogadro's number( $6.022*10 ^{23}$ )

So the number of Fluorine atoms= 0.0571* 6.022x10^23= 3.44x10^22 atoms or $3.44 *10^{22}$ atoms