Why do cells have a plasma membrane?

A. to separate protein from the nucleus

B. to distinguish plants from animals

C. to define the size of the cell

D. to separate the inside of the cell from its enviroment

Students in a chemistry class added 5 g of Zinc to 50 g of hydrochloric acid. A chemical reaction occurred that produced zinc chloride and 6 g of hydrogen gas. What is the mass of the zinc chloride?

Describe how urine is removed from the blood and then eliminated from the body

Five years ago, my grandfather was five times as old as I was. Three years from now, my grandfather will be three times as old as I will be. how old am I now?

A current carrying wire wrapped around an iron ore is called a (n)

What phase transitions occur as you uniformly increase the pressure on a gaseous sample of iodine from 0.010 atm at 185 ∘c to 100 atm at 185 ∘c?

How many moles of hydrogen would be required to produce 5.0 mol of water?

What is the biggest difference between an exothermic and endothermic process? A. The direction of energy flow. B. The amount of energy transferred. C. The type of energy being transferred. D. The speed with which energy is transferred.

The mass of 1 mol of chromium (atomic mass 51.996 amu) is

Which of the following elements will tend to form a cation? A. Oxygen B. Nitrogen C. Sulfur D. Lead E. All of the Above

Is pure orange juice a solution or a suspension