How I do this? What is the molar concentration of a 50% NaOH solution? The density of
solution is 1.525 g/mL and
Mr(NaOH) = 40 g/mol.

A) 30.50 mol/L
B) 9531 mmol/L
C) 38.13 mol/L
D 19.06 mol/L
E) no answer is correct

Three alkali metals in group 1 are a. calcium, strontium, barium b. boron, aluminum, gallium c. sodium, potassium, rubidium d. fluorine, iodine, chlorine

The human eye contains a molecule called 11-cis-retinal that changes shape when struck with light of sufficient energy. the change in shape triggers a series of events that results in an electrical signal being sent to the brain that results in vision. the minimum energy required to change the conformation of 11-cis-retinal within the eye is about 164 kj/mol.

Akno3 solution containing 51 g of kno3 per 100.0 g of water is cooled from 40 ∘c to 0 ∘c. what will happen during cooling?