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Chemistry

10th Edition
Steven S. Zumdahl + 2 others
ISBN: 9781305957404

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BuyFindarrow_forward

Chemistry

10th Edition
Steven S. Zumdahl + 2 others
ISBN: 9781305957404
Textbook Problem

A 2.25-g sample of scandium metal is reacted with excess hydrochloric acid to produce 0.1502 g hydrogen gas. What is the formula of the scandium chloride produced in the reaction?

Interpretation Introduction

Interpretation: The mass of scandium metal is given. The mass of hydrogen gas that is produced due to reaction of scandium and hydrochloric acid is given. The formula of scandium chloride is to be calculated.

Concept introduction: The binary compounds are those compounds that are composed of two different elements.

The number of moles is the ratio of mass of compound to its molar mass.

To determine: The formula of scandium chloride.

Explanation

Given

The mass of scandium metal is 2.25g.

The mass of hydrogen gas  is 0.1502g.

The atomic mass of scandium is 44.95 g/mol.

Formula

The number of moles is calculated by using the formula,

Numberofmoles=GivenmassAtomicmass (1)

Substitute the values of mass and molar mass of hydrogen in equation (1).

NumberofmolesHGivenmassof HAtomicmass=0.1502g0.15mol= 0.15mol

Since, one mole of hydrochloric acid gives one mole of hydrogen and one mole of chlorine

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