During titration of 10ml Ba(OH)2 50ml of 0,4n HNO2 solution were used. What amount of Ba(OH)2 (in grams) is present in 100ml of Ba(OH)2 solution?

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.

For ai it's atomic number is 13 and it's mass number is 27 how many neutrons does it have

How many moles of magnesium is 3.01 x10^22 atoms of magnesium?