Question

CHM-120 Lab 7 Percent Composition of KCIO, Rev2-17 Page 1 of 10 Laboratory 7: Percent Composition of Potassium Chlorate Pre-Laboratory Questions 1. Answer the following (each one!) if you have three nickels, one quarter and one dime. a) How many coins do you have? b) What is the value of the coins? c) What is the value of the coins remaining if you give someone the three nickels? d) Do you have more or less than half of the value you started with? e) Do you have more or less than half of the number of coins you started with? 2. If you have coins of different masses, three which weigh 16 grams, one which weighs 35 grams and one which weighs 39 grams answer the following questions (all of them!). a) How many coins do you have? b) What is the sum of the mass of all of the coins? c) How much mass remains if you remove the three smallest mass coins (the 16 gram coins)? d) Do you have more or less than half of the mass you started with? e) Do you have more or less than half of the number of coins you started with?

Answer 1

This given problem includes basic understanding and some knowledge about currencies conversion .

Aeo) Given we haue 3 nickels, 1quarter drme అల ఉe eb nickel 1 dime 5 cents Lo cenla 11 4quanter = 25 Cerb i dallar= o cents a) Norw 5 Loins haue we Conb 3x 5+ 1x10+ x25 Cont 50 cents Value nickelb th 3 Sammeane then we aue ftem aininglens are rero 35 cents x 25 + 1x10 1 tarled oith 50 Cento or Since cwe 5 coins haue Coins lept which the frcuisus Now we ia lens thanhay of fantily

16 gras 3 Loins haue mans new We haue 35 39 5 Coins we haue b Sum all coins as: mam 48+35+39 16x3+ 35+ 39 j2grac i2agra net Hence mam (y then 3 Smalleat we remore mans tens aight! emaiig Coins 6x.3) Hne neaining 크녀9- 122-48- 122 - hane more than hay g the mas we stardted oith we we haue dles than rnzamber e Coins we larted Loith Rasianly 15 ecenlly 2

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