zacky

coleen hid a coin equivalent to a fraction of a dollar behind her back. She said the fraction is smaller than 1/2 and greater than 1/20. What is two possible coin could she have hidden. How do you know? Then she sid it was five time greater than 1/20. Sha...

Which of the following is a weak electrolyte in aqueous solution? a. acetic acid b. lithium acetate c. ammonium carbonate d. sulfuric acid e. calcium hydroxide

Which of the following is a weak electrolyte in aqueous solution? a. H2SO3 b. HNO3 c. HBr d. HClO4 e. NaOH

Which one of the following mixtures is suitable for making buffers? 1 H3PO4 and NaH2PO4 2 Na2CO3 and NaHCO3 3 NH4Cl and NH3 a. 1 only b. 2 only c. 3 only d. 1 and 2 only e. 1, 2, and 3

A 0.010 M solution of a weak monoprotic acid has a pH of 3.70. What is the acid-ionization constant, Ka, for this acid? a. 2.0 ´ 10-4 b. 2.0 ´ 10-5 c. 4.0 ´ 10-6 d. 4.0 ´ 10-7 e. 4.0 ´ 10-8

choose the one with the ions present cause Cu+2+2OH- and so on it gives you CuO(s) and H2O(L)

The answer is H2SO3 since it is formed from SO2 reacting with H2O