an unknown gas composed of a diatomic molecule effuses at a rate that is only 0.355 times that of O2 at the same temperature. calculate the molar mass of the unknown and the identity of

Which of the following is not true about the atomic model of substances?

Liquid from a brewery fermentation contains 10% ethanol and 90% water. part of the fermentation product (50,000 kg/h) is pumped to a distillation column on the factory site. under current operating conditions, a distillate of 45% ethanol and 55% water is produced from the top of the column at a rate of one-tenth that of the feed. what is the composition of the waste "bottoms" from the still?

Why are enzymes important to cells? they bring about chemical reactions. they provide structural support. they form the two layers of membranes. they store large quantities of energy.