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Lostsunrise [7]
2 years ago
8

True/False 1,atoms combines to form element 2, a physical changes is a change in the composition of as substance 3, physical pro

perties are used as a basis for identifying substance 4, a symbol stands for one atom of an element?​
Chemistry
2 answers:
olasank [31]2 years ago
6 0

Answer:

False

False

True

True

Tell me if my answers are correct

Explanation:

1,atoms combines to form element.

False/ atoms combines to form molecule

2, a physical changes is a change in the composition of a substance.

False/a physical changes is a change in the form of a substance.

3, physical properties are used as a basis for identifying substance.

True

4, a symbol stands for one atom of an element.

True

Good Luck!

viktelen [127]2 years ago
3 0

Answer:

  1. True
  2. False
  3. true
  4. false

Explanation:

hope it helps .

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An unknown liquid is composed of 34.31% c, 5.28% h, and 60.41% i. The molecular weight is 210.06 amu. What is the molecular form
ozzi

In an unknown liquid, the percentage composition with respect to carbon, hydrogen and iodine is 34.31%, 5.28% and 60.41% respectively.

Let the mass of liquid be 100 g thus, mass of carbon, hydrogen and oxygen will be 34.31 g, 5.28 g and 60.41 g respectively.

To calculate molecular formula of compound, convert mass into number of moles as follows:

n=\frac{m}{M}

Molar mass of carbon, hydrogen and iodine is 12 g/mol, 1 g/mol and 126.90 g/mol.

Taking the ratio:

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