Which of the following solutions have the same number of hydrogen ions as in 50 cm3 of 0.1 mol dm-3 sulphuric acid?

I 100 cm3 of 0.1 mol dm-3 hydrochloric acid
II 50 cm3 of 0.2 mol dm-3 nitric acid
III 100 cm3 of 0.2 mol dm-3 sulphuric acid
IV 50 cm3 of 0.1 mol dm-3 phosphoric acid

City a and city b had two different temperatures on a particular day. on that day, four times the temperature of city a was 8â° c more than 3 times the temperature of city b. the temperature of city a minus twice the temperature of city b was â’3â° c. what was the temperature of city a and city b on that day? city a was 5â° c, and city b was 4â° c. city a was 3â° c, and city b was â’1â° c. city a was 8â° c, and city b was â’3â° c. city a was 5â° c, and city b was â’5â° c.

Why are people not able to scuba dive in the deep part of the ocean

According to periodic trend, which of the following most likely has the highest ionization energy? kr be ni sc