Please I need a note on Matter, it's types, properties, examples

What type of solution is formed if 10 g of kclo3 are dissolved in 100g of water at 30

If you have 5.25 grams of methane (ch4), how many grams of co2 will you produce ?

Which of the following ocean acidification? are the most likely side effects of a ph less than 7.0 in the ocean b. more metal salts altering the ocean chemistry c. dissolution of the shells of marine organisms d. both a & b e. all of the above.