What is the number of Cl atoms in a 784 gram pure sample of NC13?

If two atoms are bonded to a central atom with no lone pairs,how will they be arranged

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.

Which of the following are correct values for the ideal gas laws constant r