A gas mixture being used to simulate the at- mosphere of another planet consists of 311 mg of methane, 216 mg of argon, and 212 mg of nitrogen. The partial pressure of nitrogen at 293 K is 16 kPa. Calculate the total pressure of the mixture.

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

Asolution contains 180 g of glucose (c6h12o6) and 162 g of water. what is the mole fraction of glucose?

Determine the empirical formula for succinic acid that is composed of 40.60% carbon, 5.18% hydrogen, and 54.22% oxygen.