28 which compound yields h + ions as the only positive ions in an aqueous solution?
(1) koh (3) ch3oh(2) naoh (4) ch3cooh

(4)

Explanation:-

According to Arrhenius concept, a base is defined as a substance which donates hydroxide ions when dissolved in water and an acid is defined as a substance which donates hydronium ions in water.

1. is a strong electrolyte and thus dissociate in water.

2. is a non electrolyte and thus do no dissociate in water.

3. is a strong electrolyte and thus dissociate in water.

4. is a weak electrolyte and thus partially dissociate in water.

the child will have heterozygous dominant chromosomes as characters of his father are dominant over the characters of his mother.

the child is heterozygous

im not exactly sure but i think its b!