A balloon has been filled to a volume of 1.90 L with 0.2 mol of helium gas. If I add helium until 0.6 mol of helium is in the balloon, what is the new volume of the balloon?
0.63 L
5.7 L
15.8 L
0.06 L

150.0 grams of asf3 were reacted with 180.0 g of ccl4 to produce ascl3 and ccl2f2. if the actual yield of ccl2f2 was 127 g, what is the percent yield?

Zoe is investigating the composition of substance a, an unknown substance. using chemical processes, she analyzes substance a and determines it is composed of sodium, oxygen, and hydrogen atoms in a ratio of 1 : 1 : 1. what is substance a? a. a compound b. an element c. a heterogeneous mixture d. a homogeneous mixture

What is the ima of the 1 st class lever in the graphic given? 2 3 0.5