Converting using molar mass

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Presentation transcript:

Converting using molar mass Because the molar mass of a substance is equal to one mole, we can use it to convert between grams and moles. To do this we are going to use a t chart

Ex. A sample of sodium chloride has a mass of 125 g Ex. A sample of sodium chloride has a mass of 125 g. How many moles is this?

Ex. 2 If I have 14.3 mol of barium sulfate, how many grams is this?

Ex. 3 An sample of an unknown compound has a mass of 432. 5 g Ex. 3 An sample of an unknown compound has a mass of 432.5 g. This is known to be 5.8 mol of the substance. What is its molar mass?

Mole-Mass Conversions How many moles are there in 768 grams of iron (III) sulfate? How many moles are there in 120 g of potassium dichromate I have 13.2 moles of lead (II) nitrate. How many grams is this? How many grams would 5.75 moles of magnesium hydroxide weigh? How many moles are there in 78 grams of nitrogen? How many grams would 12.30 moles of sulfur hexafluoride weigh? I have 511.01 grams of an unknown compound, and it is known this amount represents 4.50 moles of this compound. What is the molar mass of the compound? I have 7.60 moles of chlorine gas. Would this amount weigh more than a pound? Prove your answer. (1 lb = 454 g) What is the molar mass of a compound if it is known that 658 grams of this compound represent 6.89 moles? How many moles are there in 34.5 grams of strontium chloride?