Forum Forums Class 9 Science Atoms and Molecules Notifications Clear all Atoms and Molecules Page 13 / 15 Prev 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Next Votes & Answers Question Question Status 0 1 215 The valency of nitrogen in NH3 is (a) 1 (b) 3 (c) 4 (d) 5 By Trisha Dave, 5 years ago replies 1 0 1 383 The symbol of cadmium is (a) Ca (b) Cu (c) Cm (d) Cd By Trisha Dave, 5 years ago replies 1 0 1 255 The formula for quick lime is (a) CaCl2 (b) CaCO3 (c) Ca(OH)2 (d) CaO By Trisha Dave, 5 years ago replies 1 0 1 161 Calculate the number of aluminium ions present in 0.051 g of aluminium oxide. (Hint: The m... By Trisha Dave, 5 years ago replies 1 0 1 153 Calculate the number of molecules of sulfur (S8) present in 16 g of solid sulphur? By Trisha Dave, 5 years ago replies 1 0 1 137 What is the mass of (a) 0.2 mole of oxygen atoms? (b) 0.5 mole of water molecules? By Trisha Dave, 5 years ago replies 1 0 1 129 Convert into mole. (a) 12 g of oxygen gas (b) 20 g of water (c) 22 g of carbon dioxide By Trisha Dave, 5 years ago replies 1 0 1 183 What is the mass of (a) 1 mole of nitrogen atoms? (b) 4 moles of aluminium atoms (atomic m... By Trisha Dave, 5 years ago replies 1 0 1 158 Calculate the molar mass of the following substances: (a) Ethyne, C2H2 (b) Sulphur molecul... By Trisha Dave, 5 years ago replies 1 0 1 151 Give the names of the elements present in the following compounds: (a) Quicklime (b) Hydro... By Trisha Dave, 5 years ago replies 1 Page 13 / 15 Prev 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Next Share: Super Globals Requests: Server: Options and Features route: community use_home_url: url: https://eanshub.com/community/ pageid:187 default_groupid: 3 2022 How Can We Help? Δ Home About Us Contact Us Privacy Policy Term of Use Copyright © 2020 Eanshub All Rights Reserved
