convert from atoms >> to number of moles by Avogadro's number>> to mass by molar massmolar mass of platinum = 195.084 g \/moleAvogadro's number =6.0221409 \u00d7 10^23\nmass of platinum = (4.91 \u00d7 10^21 atoms) \u00d7 ( 1 mole \/ 6.0221409 \u00d7 10^23 \u00a0atoms) \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00d7 ( 195.084 g \/mole)**mass of platinum = 1.593807412 g "},{"id":1144103,"content":"Good Day...Problem:What is the mass of 4.91\u00d71021 platinum atoms?4.91\u00d71021 platinum atoms = ______________mass of PlatinumGiven: Platinum (Pt) molar mass = 195.084 g\/mol or some teachers tries to round it off to 195 g\/mol.Note: 1 mole of Pt have 6.022 x 10^23 \u00a0number of atoms and 1 mole of Pt = 195.084 g. We could also say that 195.084 grams of Pt have 6.022 x 10^23 number of atoms.Solution:We will be using the conversion factor 195.084 grams \/ 6.022 x 10^23 atoms since we are looking for the mass of Platinum with the number of atoms given.Mass of Pt = 4.91\u00d710^21 atoms \u00d7 195.084 gram \/ 6.022 x 10^23 atoms \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0= 957.86244 \u00d7 10^21 grams \/ 6.022 x 10^23 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0= 159.0605 \u00d7 10^-2 grams or 1.59 \u00d7 10^0 gramsMass of Platinum = 1.59 \u00a0gramsAnswer:Mass of Platinum = 1.59 \u00a0gramsHope it helps....=)"}>" data-test="answer-box-list">**

What is the mass of 4.91 × 10^21 platinum atoms?

What is the mass of 4.91 × 10^21 platinum atoms?

convert from atoms >> to number of moles by Avogadro"s number>> to mass by molar mass

molar mass of platinum = 195.084 g /mole

Avogadro"s number =6.0221409 × 10^23

mass of platinum = (4.91 × 10^21 atoms) × ( 1 mole / 6.0221409 × 10^23 atoms)

× ( 195.084 g /mole)

**mass of platinum = 1.593807412 g **

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You are watching: What is the mass of 4.91×1021 platinum atoms?

**Problem:**

What is the mass of 4.91×1021 platinum atoms?

4.91×1021 platinum atoms = ______________mass of Platinum

**Given:**

** Platinum **(Pt) molar mass = **195.084 g/mol **or some teachers tries to round it off to 195 g/mol.

**Note:** 1 mole of Pt have 6.022 x 10^23 number of atoms and 1 mole of Pt = 195.084 g. We could also say that **195.084 grams of Pt have 6.022 x 10^23** number of atoms.

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**Solution:**

We will be using the conversion factor **195.084 grams / 6.022 x 10^23 atoms ** since we are looking for the mass of Platinum with the number of atoms given.