Question

Question 18 1 pts Which sample contains the greatest number of molecules? O 60.0g C4H10 O 100.0g C4H. O 45.0g C2H6 O 35.0g CH2

Answer 1

1.

Mass of C4H10 = 60.0 g Molar Mass of C4H10 Moles of C4H10 58.12 g/mol Mass of C4H10 Molar Mass 60.00 g 58.12 g/mol 1.032 mol One mole so molecules in C4H10 = 1.032 mol 6.022E+23 molecules C4H10 1.032 mol * _6.02E+23 atoms 1.00 mol 6.22E+23 molecules

2.

Mass of C6H6 100.0 g Molar Mass of C6H6 Moles of C6H6 78 g/mol Mass of C6H6 Molar Mass 100.00 g 78 g/mol 1.282 mol One mole so molecules in C6H6 1.282 mol 6.022E+23 molecules С6Н6 1.282 mol * _6.02E+23 atoms 1.00 mol 7.72E+23 molecules

3.

Mass of C2H6 45. 08 Molar Mass of C2H6 Moles of C2H6 32 g/mol Mass of C2H6 Molar Mass 45.00 g 32 g/mol 1.406 mol One mole so molecules in C2H6 1.406 mol 6.022E+23 molecules С2Н6 1.406 mol* 6.02E+23 atoms 1.00 mol 8.47E+23 molecules

4.

Mass of C2H2 35.0 8 Molar Mass of C2H2 Moles of C2H2 26 g/mol Mass of C2H2 Molar Mass 35.00 g 26 g/mol 1.346 mol One mole so molecules in C2H2 1.346 mol 6.022E+23 molecules C2H2 1.346 mol* mol* 6.02E+23 atoms 1.00 mol 8.11E+23 molecules

C2H6 has greater number of molecules