Give the names of the elements present in the following compounds

Question

Give the names of the elements present in the following compounds.

(a) Quick lime

(b) Hydrogen bromide

(c) Baking powder

(d) Potassium sulphate.

Asked by Vishal kumar | 1 year ago | 197

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Class 9 Science Atoms and Molecules Add Answer

Calculate the number of aluminium ions present in 0.051g of aluminium oxide.

(Hint: The mass of an ion is the same as that of an atom of the same element. Atomic mass of Al = 27u)

Class 9 Science Atoms and Molecules View Answer

Calculate the number of molecules of sulphur (S8) present in 16g of solid sulphur.

Class 9 Science Atoms and Molecules View Answer

What is the mass of:

(a) 0.2 mole of oxygen atoms?

(b) 0.5 mole of water molecules?

Class 9 Science Atoms and Molecules View Answer

Convert into mole.

(a) 12g of oxygen gas

(b) 20g of water

(c) 22g of carbon dioxide

Class 9 Science Atoms and Molecules View Answer

What is the mass of -

(a) 1 mole of nitrogen atoms?

(b) 4 moles of aluminium atoms((Atomic mass of aluminium =27)?

(c) 10 moles of sodium sulphite (Na₂SO₃)?

Class 9 Science Atoms and Molecules View Answer

Accepted Answer

The following are the names of the elements present in the following compounds:

(a) Quick lime - Calcium and oxygen (CaO)

(b) Hydrogen bromide - Hydrogen and bromine (HBr)

(c) Baking powder - Sodium, Carbon, Hydrogen, Oxygen (NaHCO₃)

(d) Potassium sulphate - Sulphur, Oxygen, Potassium (K2SO₄)

Answered by Shivani Kumari | 1 year ago