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Check off each one that shows a correct conversion. Example: 1 mol Al= 6.022 x 10^23 atoms Al would be checked off.

A. 2.5 mol CaCO3 = 1.51 x 10^24 molecules CaCO3

B. 2 mol Al2O3 = 101.96 g Al2O3

C. 1 mol Be3N2 = 55.06 g

Check off each one that shows a correct conversion Example 1 mol Al 6022 x 1023 atoms Al would be checked off A 25 mol CaCO3 151 x 1024 molecules CaCO3 B 2 mol class=

Respuesta :

Answer:

Explanation:

A. molecules of CaCO3 = number of moles x avogadros number

=  2.5 x 6.022 x 10^-23 =  1.5055 x 10^-22

B. the mass of 2 moles of Al2O3 is = molar mass of Al2O3 x number of moles

the molar mass of Al2O3 = 2 x molar mass of Al + 3 x molar mass of O

= 2 x 27 + 3 x 16 = 102 g/mol

the mass of Al2O3 = 102 x 2 = 204 g

C. 1 mol of Be3N2 = number of moles x molar mass of Be3N2

molar mass of Be3N2 = 3 x molar mass of Be + 2 x molar mass of N

= 3 x 9 + 2 x 14 = 55g/ mol

so the mass of 1 mol of Be3N2 is 55 g

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