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Worksheet 20 . Topic 6

Set D: Mole – Mass calculations Objective: To test your ability to do mole - mass calculations
Calculate the mass of the given number of moles of the substances.
Use the mole equation on Reference Table T to set up each problem, and then solve.
Write answers in the boxes below.

23. What is the mass of 0.5 mole of ammonia, NH3?

24. What is the mass of 2 moles of Ca(OH)2 ?

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25. What is the mass of 4.2 moles of H3PO4?

26. What is the mass of 0.75 mole of butane, C4H8 Need help? Study Book pg 125 - 126 Set 7 and 9

27. What is the mass of 2 moles of gypsum, CaCl2.2H2O ?

Calculate the number of moles in the given mass of the substances.
Use the mole equation on Reference Table T to set up each problem, and then solve.

28. How many moles of HCl are there in 108 grams of the substance?

29. What is the number of moles of Na2SO4 in 300 grams of the substance?

30. What is the total number of moles in 576 g of (NH4)2CO3 ?

31. How moles of MgSO4.7H2O are in 124 grams of the substance?

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