11) How many significant figures would be in your correctly rounded 230 x 4.88 X.0643*
Is it 1,2,3,4?

If the mass of the products measured 120g what would the mass of the reactants a. 30g b. 60g c. 120g d. 240g

Ican determine the molar mass of an element by looking on the under the atomic mass for the element. for example the molar mass of phosphorus is 30.974 grams/mole. avogadro’s number tells me the amount of representative particles in 1 mole of any substance. this means 12.011 gram sample of carbon and a 32.0 gram sample of sulfur have the same number of atoms.

650.j is the same amount of energy as? 2720cal1550cal650.cal2.72cal