Question 1
Blackboard chalk is a mixture of limestone and gypsum. A piece of blackboard chalk weighing 5.42g was immersed in HCl. The CO2 produced weighed 1.11g. What is the percentage of limestone in the calk?
Objective
Question details
- Exam body
- OAU
- Subject
- Chemistry
- Year
- 2017/2018
- Question no.
- #1
- Type
- Objective
More from this paper
- Q3Given the half-cell reaction, 2Br → Br 2 , how many moles of electron will…
- Q4One mole of an alkanol and one mole of an alkanal, each containing n moles of…
- Q5The basic tenet of valence bond electron pair repulsion theory is that the pairs…
- Q6The equilibrium constant at constant pressure, Kp for the reaction, 2NO(g) + Cl…
- Q7How many sigma (σ) bonds are there in the molecule below:
- Q8The enthalpy changes for the atomization of methane and ethane are 1648 and…