Chemistry
(a) State whether the following statements are True or False. Justify your answer.
(1) Fluorine is most electronegative element.
(2) The size of potassium atom is greater than the size of sodium atom.
(b) Calculate the number of moles in 9 grams of water.
Related Questions
Identify the anion present in each of the following compounds.
(a) Barium chloride on reacting with compound Z will form a white precipitate.
(b) Compound Y on reaction with sulphuric acid will liberate carbon dioxide along with sodium sulphate and water.
Identify the reactant and write the balanced equation for the following.
Calcium nitrate reacts with compound Q to give calcium hydroxide and sodium nitrate.
Fill in the blanks selecting the appropriate word from the given choice.
(a) Formation of …………… (NH4+, NH3) involves ammonia molecule and hydrogen ion.
(b) Hydroxyl ion or hydroxide ion is formed when one …………… [H+, OH-] ion is removed from water molecule.
(c) Hydrogen needs one electron to complete its …………… [singlet, duplet].
An organic compound containing C, H and O has 49.3% carbon, 6.84% hydrogen, 43.86% oxygen and its vapour density is 73. What will be the molecular formula of the compound?