What is the percentage by mass of copper in copper in copper (l) oxide (CU2O)? [O = 16; CU =64]

Assessment: WAEC SSCE - Chemistry - 1995 (Objective) Subject: Chemistry

Question 1 Report

What is the percentage by mass of copper in copper in copper (l) oxide (CU2O)? [O = 16; CU =64]
Answer Details
To determine the percentage by mass of copper in copper (I) oxide (Cu2O), we need to calculate the molar mass of Cu2O, which is the sum of the atomic masses of the elements in the compound. Molar mass of Cu2O = 2Cu + O = (2 x 64) + 16 = 144 g/mol The molar mass of copper in Cu2O is 2 x 64 = 128 g/mol The percentage by mass of copper in Cu2O is: (128 g Cu / 144 g Cu2O) x 100% = 88.9% Therefore, the correct answer is 88.9%.
Read lesson note on Stoichiometry And Chemical Reactions (WAEC)
View Answer

Related Questions

1

Consider the reaction represented by the equation below: XO + YO → X + YO2 In the reaction, YO acts as
2

Which of the following species is always present in acidified water?
3

Which of the following cannot be deduced from the electronic configuration of a transition metal?
4

A positive brown ring test indicates the presence of
5

If a solid has a low melting point and dissolves readily in benzene, it would probably
6

Which of the following molecules is linear in shape?
7

A WEAK ACID IS ONE WHICH
8

The most suitable method for preparing lead (ll) chloride is by

Download The App On Google Playstore

Everything you need to excel in your exams

Green Bridge CBT Mobile App
Personalized AI Learning Chat Assistant
200,000+ Exam Questions Across IGCSE, JAMB, WAEC & NECO
Over 3,900 Lesson Notes
Offline Support - Learn Anytime, Anywhere
Green Bridge Timetable
Literature Summaries & Potential Questions
Track Your Performance & Progress
In-depth Explanations for Comprehensive Learning