How does the size of a magnesium ion with a 2 charge compare with that of a sodium ion with a single charge

The clouds are grey and ground is wet. a quantitative b qualitative

Estimate the molar mass of the gas that effuses at 1.6 times the effusion rate of carbon dioxide.

Apound is approximately 0.45 kilogram. a persons weighs 87 kilograms. what is the persons’s weight, in pounds, when expressed to the correct number of significant figures