Which organelle do you think is the most important and why

Which of the following changes are not reversible Select one: a. Dehydration b. Melting c. Decomposition d. Hydration

What is the basic unit of energy?

If an atom with a mass of 47 amu has 22 neutrons, what atom is it?

How many grams of water can be produced when 8.73 moles of benzene react with excess oxygen?

Hydrazine, N2H4, is a corrosive liquid used in rocket and jet fuels. Ammonia, NH3, is a gas that dissolves in water to form a solution that can be used as a cleaning agent.

Organic compounds ALL contain the element carbon. Which organic compound, used for stored chemical energy, contains carbon, hydrogen, oxygen, and often phosphorous?

In a polar molecule, which atom will have the greatest partial negative charge? A) the smallest atom B) the least electronegative atom C) the largest atom D) the most electronegative atom

Why is portion control important

Which ionic compound is the most likely to dissolve in water? CaSO4 Na2SO4 BaSO4 SrSO4

Calcium (atomic number 20) has electron configuration 1s2,2s2,2p6,3s2,3p6,4s2. The atomic number of scandium is 21. Which orbital does the 21st electron enter? a. 3d b. 4p c. 4d d. 4f