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VICChemistryQuick questions

Unit 1: How can the diversity of materials be explained?

Quick questions on Mole concept and stoichiometry (VCE Chemistry Unit 1)

5short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.

What are concentration of solutions?
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c=n/Vc = n/V where VV is volume in litres. Units: mol L−1^{-1} (M).
What is wrong molar mass?
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Always include all atoms; check water vs methane vs ammonia carefully.
What is q1?
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Calculate the number of molecules in 5.00 g5.00 \, \text{g} of glucose, C6H12O6\text{C}_6 \text{H}_{12} \text{O}_6. [2 marks]
What is q2?
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Magnesium reacts with hydrochloric acid: Mg+2HCl→MgCl2+H2\text{Mg} + 2 \text{HCl} \to \text{MgCl}_2 + \text{H}_2. If 2.43 g2.43 \, \text{g} of Mg is added to 100 mL100 \, \text{mL} of 1.50 mol/L1.50 \, \text{mol/L} HCl, determine the limiting reagent and the mass of MgCl2\text{MgCl}_2 formed. [4 marks]
What is q3?
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N2+3H2→2NH3\text{N}_2 + 3 \text{H}_2 \to 2 \text{NH}_3. (a) Calculate the mass of ammonia formed from 14.0 g14.0 \, \text{g} of N2\text{N}_2 assuming complete reaction. (b) State the moles of H2\text{H}_2 consumed.

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