### Chemistry Exercise: Nickel Calculations**12 (a)** Calculate the number of moles of the element present in 99.9 g of nickel.**(b)** Calculate the mass in grams of a sample containing 0.251 mole of nickel.**(c)** Calculate the number of atoms in a sample containing 0.251 mole of nickel.### Explanation:- **Moles Calculation:** Use the formula: \[ \text{Moles} = \frac{\text{mass (g)}}{\text{molar mass (g/mol)}} \]- **Mass Calculation:** Multiply moles by the molar mass.- **Atoms Calculation:** Use Avogadro's number (6.022 x 10²³ atoms/mol) to find the number of atoms from moles.

Given a) Mass of Ni = 99.9 g b) No.of moles of Ni = 0.251 mol c) No.of moles of Ni =…

12 (a) Calculate the # of moles of the alement present in 99.9 g of nickel (b) Calcolate the mass in grams of a Sample Containing O.251 mole of nickel. (c) Calculate the # of atoms centaining a sample 0.251 mole of nickel

12 (a) Calculate the # of moles of the alement present in 99.9 g of nickel (b) Calcolate the mass in grams of a Sample Containing O.251 mole of nickel. (c) Calculate the # of atoms centaining a sample 0.251 mole of nickel

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

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Concept explainers

Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".

Question

### Chemistry Exercise: Nickel Calculations

**12 (a)** Calculate the number of moles of the element present in 99.9 g of nickel.

**(b)** Calculate the mass in grams of a sample containing 0.251 mole of nickel.

**(c)** Calculate the number of atoms in a sample containing 0.251 mole of nickel.

### Explanation:
- **Moles Calculation:** Use the formula:
\[
\text{Moles} = \frac{\text{mass (g)}}{\text{molar mass (g/mol)}}
\]
- **Mass Calculation:** Multiply moles by the molar mass.
- **Atoms Calculation:** Use Avogadro's number (6.022 x 10²³ atoms/mol) to find the number of atoms from moles.

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