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chemistry

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63 questions


An alkanol containing 60% carbon by mass would have a molecu...
An alkanol containing 60% carbon by mass would have a molecular formula.
4 months ago 1 answer(s) 2 votes


1.0g of CaCO3 was treated with excess 0.1M HCl. At the end o...
1.0g of CaCO3 was treated with excess 0.1M HCl. At the end of the reaction, the acid still left unreacted required 25cm³ of 0.1M Na2CO3 to neutralise it...
4 months ago 1 answer(s) 4 votes


Which processes are exothermic?      I. Ice ...
Which processes are exothermic?      I. Ice melting      II. Neutralization      III. Co...
5 months ago 1 answer(s) 2 votes


Which statements about bonding is correct? A. Bond breaking...
Which statements about bonding is correct? A. Bond breaking is endothermic and requires energy B. Bond breaking is endothermic and releases e...
5 months ago 1 answer(s) 3 votes


The specific heat of iron is 0.450Jg-1K-1. What is the energ...
The specific heat of iron is 0.450Jg-1K-1. What is the energy, in J required to increase the temperature of 50.0g of iron by 20.0K?...
5 months ago 1 answer(s) 3 votes


An example of biodegradable pollutant is A. plastic B. sew...
An example of biodegradable pollutant is A. plastic B. sewage C. carbon (II) oxide D. hydrogen sulphide
5 months ago 1 answer(s) 3 votes


Calcium chloride is an ionic compound. Which of the followin...
Calcium chloride is an ionic compound. Which of the following statements account for its ionic character? I. Calcium has high ionization energy ...
5 months ago 1 answer(s) 4 votes


Dilution factor is the A. amount of distilled water that is...
Dilution factor is the A. amount of distilled water that is added to the concentrated solution to dilute it B. quantity of distilled water ad...
5 months ago 1 answer(s) 2 votes


Which of the following quantities is a molar quantity? A. M...
Which of the following quantities is a molar quantity? A. Molarity B. Molar mass C. Mass concentration D. Molality
5 months ago 1 answer(s) 2 votes