10 Questions
What is the ratio in which O combines with H to form water (H2O)?
1:2
How many molecules of H2O are formed when 4 atoms of H combine with 2 atoms of O?
3 molecules
What is the term for the simple numerical ratios in which atoms combine to form molecules?
Stoichiometry
In stoichiometry, what does the term 'mole' represent?
Amount of substance
Which concept helps in understanding the quantities of reactants and products in a chemical reaction?
Stoichiometry
What is the definition of mole?
The sum of atomic weights of a molecule
What is the ratio of carbon moles to chlorine moles needed for the preparation of C2Cl6 (hexachloroethane)?
1:3
How many moles of carbon are required to combine with 4.87 moles of Cl to form C2Cl6 (hexachloroethane)?
1.29 moles
What is the molar mass of Si (Silicon) if 30.5g of Si corresponds to 2.65 moles?
28.1g/mol
What is the formula weight of Na2CO3 (sodium carbonate) if the molecular weight is 106.0g?
132g
Learn about chemical calculations, including the concept of mole and the formation of molecules based on simple numerical ratios. This quiz is suitable for second-year students of analytical chemistry.
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