Tiwari Academy Discussion

Viraj Badal

Asked: October 30, 2020In: Class 9

If one mole of carbon atoms weighs 12 grams, what is the mass (in gram) of 1 atom of carbon?

NCERT Solutions for Class 9 Science Chapter 3 Atoms And Molecules NCERT Books for Session 2022-2023 CBSE Board and UP Board Intext Questions Page No-42 Questions No-1

Viraj Badal

Asked: October 30, 2020In: Class 9

Which has more number of atoms, 100 grams of sodium or 100 grams of iron (given, atomic mass of Na = 23 u, Fe = 56 u)?

NCERT Solutions for Class 9 Science Chapter 3 Atoms And Molecules NCERT Books for Session 2022-2023 CBSE Board and UP Board Intext Questions Page No-42 Questions No-2

Viraj Badal

Asked: October 30, 2020In: Class 9

A 0.24 g sample of compound of oxygen and boron was found by analysis to contain 0.096 g of boron and 0.144 g of oxygen. Calculate the percentage composition of the compound by weight.

NCERT Solutions for Class 9 Science Chapter 3 Atoms And Molecules NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-43 Questions No- 1

Viraj Badal

Asked: October 30, 2020In: Class 9

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

NCERT Solutions for Class 9 Science Chapter 3 Atoms And Molecules NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-43 Questions No- 2

Daksha Singh

Asked: October 30, 2020In: Class 9

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

NCERT Solutions for Class 9 Science Chapter 3 Atoms And Molecules NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-44 Questions No-5 Give the names of the elements present in the following compounds. (a) Quick lime (b) Hydrogen ...

Bhavani das

Asked: October 28, 2020In: Class 9

Hydrogen and oxygen combine in the ratio of 1:8 by mass to form water. What mass of oxygen gas would be required to react completely with 3 g of hydrogen gas?

Atoms And Molecules NCERT Books for Session 2022-2023 CBSE Board and UP Board Intext Questions Page No-33 Questions No-2

Daksha Singh

Asked: October 28, 2020In: Class 9

Write the chemical formulae of the following.

NCERT Solutions for Class 9 Science Chapter 3 Atoms And Molecules NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-44 Questions No- 4 Write the chemical formulae of the following. (a) Magnesium chloride (b) Calcium oxide (c) Copper nitrate (d) ...

Daksha Singh

Asked: October 28, 2020In: Class 9

Calculate the molar mass of the following substances.

NCERT Solutions for Class 9 Science Chapter 3 Atoms And Molecules NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-44 Questions No- 6 Calculate the molar mass of the following substances. (a) Ethyne, C2H2 (b) Sulphur molecule, S8 (c) ...

Daksha Singh

Asked: October 28, 2020In: Class 9

What is the mass of:

NCERT Solutions for Class 9 Science Chapter 3 Atoms And Molecules NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-44 Questions No-7 What is the mass of— (a) 1 mole of nitrogen atoms? (b) 4 moles of aluminum ...

Daksha Singh

Asked: October 28, 2020In: Class 9

Convert into mole.

NCERT Solutions for Class 9 Science Chapter 3 Atoms And Molecules NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-44 Questions No-8 Convert into mole. (a) 12 g of oxygen gas (b) 20 g of water (c) 22 g ...

If one mole of carbon atoms weighs 12 grams, what is the mass (in gram) of 1 atom of carbon?

Which has more number of atoms, 100 grams of sodium or 100 grams of iron (given, atomic mass of Na = 23 u, Fe = 56 u)?

A 0.24 g sample of compound of oxygen and boron was found by analysis to contain 0.096 g of boron and 0.144 g of oxygen. Calculate the percentage composition of the compound by weight.

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

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

Hydrogen and oxygen combine in the ratio of 1:8 by mass to form water. What mass of oxygen gas would be required to react completely with 3 g of hydrogen gas?

Write the chemical formulae of the following.

Calculate the molar mass of the following substances.

What is the mass of:

Convert into mole.

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