Select the correct answer.

The presence of which phenomenon proved the predictability of the big bang theory?

O A.

death of large, ancient stars

B.

cosmic microwave background (CMB)

O c. formation of the Orion nebula

D. formation of new stars

Racet

N

.

How many grams are in 23.0 moles of carbon (C) ?

How much energy is added to change 180g of liquid water to gas at 100 degrees Celsius

The order of elements in the periodic table is based on a. the number of protons in the nucleus. c. the number of neutrons in the nucleus. b. the electric charge of the nucleus. d. atomic mass.

4 molecules of glucose has how many carbon hydrogen and oxygen

Which statement about gases is true? They are made up of particles that always move very slowly. They are made up of particles that travel in a curved path when in motion. They are made up of hard spheres that vibrate quickly in stationary positions.

Calculate the vapor pressure lowering on an aqueous solution of glycerin that contains 180g of glycerin and 1000g of water at 25c. The vapor pressure of water at this temperature is 23.8torr.

Why does one Oxygen atom bond with two Hydrogen atoms to form water? Why don't they bond in a different ratio?

A fossilized bone contains about 65% of its original carbon-14. to the nearest hundred years, how old is the bone

Calculate the mass of 1.25 moles of Al2 (SO4) 3

which of Nature's erosions message do you think wears down a mountain or part 2 faster when water or ice why