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Shoe makers use the standard unit pair to group shoes. DOZEN = 12. PAIR = 2. MOLE = 6.022 X 1023. The numerical value of the mole is constant, just as ...
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OF ATOMS IN A SAMPLE. Bakers use the standard unit dozen to count baked goods. Shoe makers use the standard unit pair to group shoes. DOZEN = 12 PAIR = 2 MOLE = 6.022 X 10^23 The numerical value of the mole is constant, just as the numerical value of dozen is constant. USE AVOGARDO’S NUMBER TO CONVERT BETWEEN MOLES TO MOLECULES USE AVOGADRO’S NUMBER TO CONVERT BETWEEN MOLES & ATOMS
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unit want answer to be in 5.79 mole CuCl 2 x 6.022 x 10 23 molecules CuCl 2 = 3.49 x 10 24 molecule CuCl 2 1mole CuCl 2 unit given in problem Multiply all numbers in numerator , divide by all numbers in denominator. (5.79 mole CuCl 2 )(6.022 x 10^23 molecules CuCl 2 )= 3.49 x 10^24 molecule CuCl 2 1 mole CuCl 2 When dividing, cancel out units
What amount in moles is equivalent to 4.24 x 10 25 molecules of C 6 H 12 O 6? 4.24 x 10^25 molecules C 6 H 12 O 6 x 1 mole C 6 H 12 O 6 = 6.022 x 10^23 molecules C 6 H 12 O 6 (4.24 x 10^25 molecules C 6 H 12 O 6 )(1 mole C 6 H 12 O 6 ) = 70.41 moles C 6 H 12 O 6 6.022 x 10^23 molecules C 6 H 12 O 6 Mole is like dozen, it doesn’t matter if you are counting eggs or donuts, dozen is always 12. Doesn’t matter what the chemical is, mole always means 6.022 x 10^23.
How many atoms of copper are in 2.5 moles of copper? A sample of NaCl contains 4.5 x 10 22 molecules. How many moles of NaCl are in the sample?
How many atoms of copper are in 2.5 moles of copper? 2.5 moles Cu x 6.022 x 10^23 atoms Cu = 1.51 x 10^24 atoms Cu 1 mole Cu A sample of NaCl contains 4.5 x 10^24 molecules. How many moles of NaCl are in the sample? 4.5 x 1024 molecules NaCl x 1 mole NaCl = 7.5 moles NaCl 6.022 x 10 23 molecules NaCl