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-Dominant- [34]
3 years ago
8

Which 2 elements make up the most mass in the human body?

Chemistry
2 answers:
liq [111]3 years ago
8 0

Answer: Oxygen and Carbon

Explanation:

Kay [80]3 years ago
3 0

Answer:po.op and pi.ss

Explanation:

This is a right answer

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The number of oxygen atoms in 48.0g of oxygen gas
Doss [256]

Answer:

Now u have 48 g of O2. There. Fore mole=weight/M. W. Of oxygen. Therefor 3mole.

After that if we to multiply the avogadro number with it. So 3 *NA

Now u want only atom calculation then we have 2 molecule of oxygen then multiply it with 2 too.

So final claculation is =3*2*NA.

Explanation:

your welcome

brainlest PLEASEEEEEEE!

3 0
3 years ago
Which one is unsaturated hydrocarbon?
Fittoniya [83]

Answer:

The correct answer is - D C2H4.

Explanation:

Saturated hydrocarbons are hydrocarbons with single covalent C-C bonds. They are known as alkanes. The general formula for these hydrocarbons is  CnH2n+2

Unsaturated hydrocarbons the hydrocarbons with double or triple covalent C-C bonds. They are known as alkenes and alkynes respectively. The general formula for these hydrocarbons is  CnH2n and CnHn-2

For the given options:

Option D: C2H4, is the simplest alkene with a double bond so it is an unsaturated hydrocarbon.

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Charge of nucleus is always positive whether it is element or isotope.
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Explain the difference between a physical property and chemical property. Give examples of each.
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A physical property is what a substance is like; it's directly observable. On the other hand, a chemical property is how a substance behaves; its reactivity.

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Examples of a chemical property are: flammability, combustion, and formation of a precipitate.

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