Question

a sample of sodium hydroxide contain 2.5 ×10^10 molecules. what is the mass of this sample?
plz solve it fast ​

Answer 1

Answer:

Worked Example: mass = moles × molar mass (m=n×M)

Extract the data from the question: moles = n = 0.25 mol. ...

Check the data for consistency: ...

Write the mathematical equation (mathematical formula): mass = moles × molar mass. ...

Substitute the values into the equation and solve for mass (g): mass = m = 0.25 × 18.016 = 4.504 g.