1. A gas was qualitatively analyzed and found to contain only the elements nitrogen and oxygen. The compound was further analyzed and it was determined the gas was
composed of 30.43% nitrogen and 69.57% oxygen. Calculate the empirical formula of
the gas. (3 Points).

Iknow the answer is a but i don't know why

During trial 2, what allowed you to determine that aluminum was the limiting reactant? check all that apply. all of the copper dissolved. all of the aluminum dissolved. the solution turned clear. the number of grams of copper(ii) chloride used in the reaction was greater than the number of grams of aluminum. the molar ratio of copper(ii) chloride to aluminum was greater than 3: 2, the equation’s molar ratio.

How many moles are in 7.2 x 10^23 carbon molecules? (*round to the nearest hundredth and include the unit "mol c" after your number) question 6 options: