Wave speed = frequency x wavelength
= 100 x 0.3
= 30 m/s.
Hope this helps!
Sodium , bromine zinc magnesium sulphur nitrogen potassium oxygen lead
Answer:
b. 6.02 x 1023 molecules
Explanation:
The formula mass of ammonia is 14 + 1 × 3 = 17.
The number of moles in 27.6g ammonia is 27.6 ÷ 17 = 1.62 mol.
A mole is 6.02 × 10²³, so the number of hydrogen atoms in a 1.62 moles of ammonia is 1.62 × 6.02 × 10²³ × 3 = 2.93 × 10² atoms.
He used prisms to demonstrate how white light is in fact made
