Recent questions and answers in Some Basic Concepts of Chemistry

by anonymous in Some Basic Concepts of Chemistry answered Sep 8

One mole of carbon atom weighs 12 g, the number of atoms in it is equal to, (Mass of carbon-12 is 1.9926 × 10–23 g)

2 answers

by Lakshmi in Some Basic Concepts of Chemistry asked May 29, 2021

A monobasic acid of weight 15.5 g is heated with excess of oxygen & evolved gases when passed through KOH solution

0 answers

by Lakshmi in Some Basic Concepts of Chemistry asked May 29, 2021

A monobasic acid of weight 15.5 g is heated with excess of oxygen & evolved gases when passed through KOH solution

0 answers

by Lakshmi in Some Basic Concepts of Chemistry answered May 25, 2021

Suppose the elements X and Y combine to form two compounds XY2 and X3Y2. When 0.1 mole

1 answer

by Lakshmi in Some Basic Concepts of Chemistry answered May 25, 2021

A mixture of gases contains H2 and O2 gases in the ratio of 1 : 4 (w/w). What is the molar ratio of the two gases

1 answer

by Lakshmi in Some Basic Concepts of Chemistry answered May 25, 2021

Equal masses of H2, O2 and methane have been taken in a container of volume V at temperature 27 °C

1 answer

by Lakshmi in Some Basic Concepts of Chemistry answered May 24, 2021

1.0 g of magnesium is burnt with 0.56 g O2 in a closed vessel. Which reactant is left in excess and how much?

1 answer

by Lakshmi in Some Basic Concepts of Chemistry answered May 24, 2021

When 22.4 litres of H2(g) is mixed with 11.2 litres of Cl2(g), each at S.T.P, the moles of HCl(g) formed is equal to

1 answer

by Lakshmi in Some Basic Concepts of Chemistry answered May 24, 2021

If Avogadro number NA, is changed from 6.022 × 10^23 mol-1 to 6.022 × 10^20 mol-1, this would change

1 answer

by Lakshmi in Some Basic Concepts of Chemistry answered May 24, 2021

The number of atoms in 0.1 mol of a triatomic gas is (NA = 6.02 × 10^23 mol-1)

1 answer

by Lakshmi in Some Basic Concepts of Chemistry answered May 24, 2021

An element, X has the following isotopic composition: 200X : 90%, 199X : 8.0%, 202X : 2.0%

1 answer

by Huzaifa Noori in Some Basic Concepts of Chemistry answered May 23, 2021

14 gm of an element ‘X’ combines with 16 gm of oxygen. On basis of this which of the following is correct ?

1 answer

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