Answer to Question #283559 in Chemistry for Lana

Question

1.What is the mass in grams of three atoms of sodium?  23Na. Molar mass = A in g/mol

Answer 1

n = m / M

m = n x M

M (Na) = 23 g/mol

1 mole of matter contains 6.022 × 10²³ elementary entities of the substance.

n (Na) = (1 x 3) / 6.022×10²³ = 0.5 x 10^-23 mol

m (Na) = 0.5 x 10^-23 x 23 = 11.5 x 10^-23 g