Given this information above, how do you solve number 1: give a reason why (other calculations) your percentage of sand might be lower than the correct value.

COMPOSITION OF A MIXTURE CALCULATIONS: Show all set-ups. 1. Calculate the mass of unknown sample. 58. 37 - 48. 38 = 9. 99 grams Answer 9:39 g sample 2. Calculate the mass of sand. 51. 20 - 48. 38 = 2.82 grams Answer 2.82 g Sand 3. Calculate the mass of copper (II) sulfate , Cus04. 9.99 9 - 2. 82 9 = 7. 17 grams Answer . 17 g salt 4. Calculate the percentage (by weight) of sand in the sample. mass of sand = 2- 82 g mass of sample : 9.9 9 9 78.23 1. Sand = _2 . 82 9 . 100 = 28. 23 Answer_ 9.97 9 Correct % Sand 30 1 (From Instructor) 5. Ask your instructor for the correct percent sand (take your report sheet). Calculate the percent error. error '1. = 28. 23 - 30 100 30 % Error 5 .9 1 . 6. Calculate the percentage (by weight) of copper (II) sulfate , Cus04, in the sample. 1001 - 28. 23 = 71.77'1. Answer_1. 17 1. QUESTIONS AND PROBLEMS 1. Give a reason why (other than calculations) your percentage of sand might be lower than the correct value. 1/9/2018