15.998 grams

Hydrogen gas is diatomic and has a molar mass of 2.0 grams while the inert helium has only one atom which has an atomic molar mass of 4.0 grams, so this would make helium 2x heavier than hydrogen molecules.

Does a mole of hydrogen have the same mass as a mole of oxygen? Explain your answer. No, a mole of oxygen atoms will have a larger molar mass than a mole of hydrogen atoms, simply because oxygen atoms are more massive.

One MOLE of hydrogen atoms contains the same number of atoms as the number of hydrogen molecules in one MOLE of hydrogen molecules, i.e., Avagadros number. However, one mole of hydrogen atoms has a mass of 1 gram while one MOLE of hydrogen molecules has a mass of 2 grams.

2 grams

118 grams

Step by step solution by experts to help you in doubt clearance & scoring excellent marks in exams. It has the minimum number of moles, and hence, the number of atoms. One gram atoms means 1 mol of atoms, thus 0.5 gram atoms Cu means 0.5 mol Cu.

25 atoms

Answers and Solutions ∴36 g of water has highest number of molecules. Answer: NA is the Avogadro number. Hence, 36 g of water contain the larges (2N A) number of molecule.

4 g of hydrogen contains the largest number of atoms.

1. (A) 4 g of hydrogen (molar mass 2) corresponds to 2 moles of molecules or 4N number of atoms where N is the Avogadro’s number (6.
2. (B) 16 g of oxygen (molar mass 32) corresponds to 0.5 moles of molecules or N number of atoms where N is the Avogadro’s number (6.

There are two oxygen atoms in a single oxygen molecule and this number of atoms is multiplied with the number of molecules. ⇒na=6.023×1023, hence the number of atoms present in 16g of oxygen molecule is 6.023×1023.

One atomic mass unit is equal to one gram per mole. When you add these together for a compound, you get the molar mass of that compound. For example, silicon dioxide consists of one silicon atom and two oxygen atoms. The atomic mass of silicon is 28 grams and the atomic mass of oxygen is 16 grams.