The molecular formula shows the actual number of each of the different atoms present in a molecule. The molecular formula is more useful than the empirical formula. We use the molecular formula to write balanced equations and to calculate molar masses. The molecular formula is always a multiple ...
Atoms of different elements have different masses. When we perform chemical calculations, we need to know how heavy one atom is compared with another. The mass of a single atom is so small that it is impossible to weigh it directly. To overcome this problem, we have to weigh a lot of a...
ChemistryCalculate the number of molecules of O2 when given the number of moles Homework Statement After balancing an equation, there are 1.82 moles of O2. Calculate the number of molecules of O2. given moles. Homework EquationsThe Attempt at a Solution in every O2 molecule, there are 2 moles...
In chemistry, a mole is a quantity used relate reactants to products in stoichiometric equations. A mole of any substance is equal to 6.02 x 10^23 particles -- usually atoms or molecules -- of that substance. For a given element, the mass (in grams) of o
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0步进电机:理论和实践指南Stepping Motors A Guide to Theory and Practice 热度: GuidetoChapter3.Formulas,EquationsandMoles Wewillspendthreelecturedaysonthischapterandonereviewday.Inthischapterwewilllearntobalancechemicalequationsanddothearithmeticofchemistry:molecalculations.Thesetwoconceptsformanimportantpartofthefou...
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b)construct redox equations using the relevant half-equations c)perform calculations, using the mole concept, involving redox reactions d)deduce stoichiometric relationships from calculations such as those in (c)References ∙Chemistry for advanced level, Peter Cann and Peter Hughes.Chemistry: The ...
Balanced equations are about molar relationships! 3rd – Bring on the Stoich 0.028206 mol Cl- 1 mol Fe(NO3)3 = 9.40x10-3 mol Fe(NO3)3 3 mol Cl- 4th – Moles is best, but grams is easier (to measure) 9.40x10-3 mol Fe(NO3)3 ...
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