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G10 Physical Sciences 2025-01
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Calculate the concentation of in 20 dm3 of HCl if 8 dm3 of H2 (gas) of was formed at STP in the reaction below:
Zn + 2HCl ZnCl2 + H2
You will require a periodic table for this.
Match the following concepts and questions with the correct answer. Some questions are calculation based and you will require a calculator. You may also require the use of a periodic table.
Figure 1: Diagram of the periodic table.
Choose the correct term for each of the following. Ensure that you have your periodic table available.
A compound with an empirical formula of C2OH4 and a molar mass of 88 grams per mole. What is the molecular formula of this compound?
What is the mass of 0,5 moles of Ca(OH)2?
Here is a periodic table to assist.
What is the mass of 0,5 moles of CH3COOH?
Here is a periodic table to assist.
Calculate the molar mass (in g.mol-1) of CaCO3.2H2O.
Here is a periodic table to assist.
A compound with an empirical formula of C2H8N and a molar mass of 46 grams per mole. What is the molecular formula of this compound?
You will require a periodic table for this question.