Question

Hey guys,
plz help me
1) What is meant by the term chemical formula ?

2) Give one example each of :-
(a) Monovalent cation
(b) Bivalent cation
(c) Monovalent anion
(d) Bivalent anion

3) What is meant by a molecule ? Give examples.

4) When 3.0g of carbon is burnt in 8.00g oxygen, 11.00g of carbon dioxide is produced. What mass of carbon dioxide will be formed when 3.00g of carbon is burnt in 50.00g of oxygen? Which law of chemical combination will govern your answer?
plz
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Answer 1

Answer:

1)simple mai chemical formula ka matlab hai ke

chemical ka ek formula uss mai be MF and EF karke ayega

2) a) cl-

b) so4 2-

c) na+

d) ca2+

3) smallest particle of atom which must have independent existance

4) 53g of co2

Answer 2

Answer:

1.  What is meant by the term chemical formula ?

A chemical formula denotes the number of atoms of each element in a compound.

2. Give one example each of :-

a) Monovalent cation - Na⁺

b) Bivalent cation - Mg²⁺

c) Monovalent anion - Br⁻

d) Bivalent anion - S²⁻

3. What is meant by a molecule ? Give examples.

A group of two or more than two atoms of the same or different elements that are chemically bonded together is called a molecule.

For example: Two atoms of hydrogen (H2) and one atom of oxygen (O2) react with each other and form one molecule of water.

4. When 3.0g of carbon is burnt in 8.00g oxygen, 11.00g of carbon dioxide is produced. What mass of carbon dioxide will be formed when 3.00g of carbon is burnt in 50.00g of oxygen? Which law of chemical combination will govern your answer?

Carbon + Oxygen ⇒ Carbon Dioxide

If 3g of carbon is burnt in 50g of oxygen, then 3g of carbon will react with 8g of oxygen. The remaining 42g of oxygen will remain un-reactive.

Only 11g of carbon dioxide will be formed,

The answer is governed by the Law of Constant Proportions.

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Hope it helps you!!

:)