Explanation:
A mole of carbon has a mass of 12.011⋅g . A mole of chlorine gas has a mass of 71.0⋅g . You do the math. The molar mass of carbon tetrachloride is 153.8 g/mol.
The wavelength of a photon that has an energy of 5.25 × 10⁻⁻¹⁹ J is
3.79 × 10⁵ cm
I attached the working and the answer to both questions below.
Please note that E= Energy C = speed of light, h = Plank's Constant, λ= wavelength
Answer: 12.92g of CoSO4
Explanation:
Molar Mass of CoSO4 = 59 + 32 + (16x4) = 59 + 32 +64 = 155g/mol
Molarity of CoSO4 = 0.303mol/L
Mass conc. In g/L = Molarity x molar Mass
= 0.303x155 = 46.965g/L
275 grams of water = 0.275L of water
46.965g of CoSO4 dissolves in 1L
Therefore Xg of CoSO4 will dissolve in 0.275L i.e
Xg of CoSO4 = 46.965x0.275 = 12.92g
Therefore 12.92g of CoSO4 is needed