In a 4.29E+1 g sample of NaHCO_3, how many grams of sodium are present? Use two decimal places in atomic masses. Only give the numeric value of your answer. Don’t include the units.

Significant figures are digits read directly from the measuring instrument plus one more digit, which is __ by the observer.

How do you convert celsius to kelvins

What kind of intermolecular forces act between a hydrogen fluoride molecule and a hydrogen peroxide molecule? note: if there is more than one type of intermolecular force that acts, be sure to list them all, with a comma between the name of each force.