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Finding mass , moles and atoms, chemistry homework help

### Question Description

I don’t understand this Chemistry question and need help to study.  Student has agreed that all tutoring, explanations, and answers provided by the tutor will be used to help in the learning process and in accordance with Studypool's honor code & terms of service. 1)  Cu , moles = 2.00

Mass in grams = moles * molar mass Cu = 2 moles * 63.546 g /mol = 127.092 g

# atoms = (6.022 *10^23 atoms / 1mole ) *2mole = 12.044 *10^23 atoms

2 )  S  , moles = mass in g /molar mass S = 64.24 /32.065 = 2.00 moles

# atoms = (6.022 *10^23 atoms / 1mole ) *2mole = 12.044 *10^23 atoms = 1.2044 *10^24 atoms

3) CaF2 ,  Mass in grams = moles * molar mass Cu = 1moles * 78.07g /mol = 78.07 g

# atoms = (6.022 *10^23 atoms / 1mole ) *1mole =6.022 *10^23 atoms

4) Be , moles = mass in g /molar mass Be = 44.00 /9.01= 5 moles

# atoms = (6.022 *10^23 atoms / 1mole ) *5mole= 30.11 *10^23 = 3.011 *10^24 atoms

5) CO2 ,  , moles = mass in g /molar mass Be =100.00 /12.010 = 8.3 moles

# atoms = (6.022 *10^23 atoms / 1mole ) *8.3 mole= 49.9*10^23 = 4.99 *10^24 atoms= 5.0*10^24atoms

6) H2O2 no values given ???

6) RbCl

# atoms = (6.022 *10^23 atoms / 1mole ) *2.20mole = 13.24*10^23 atoms = 1.324 *10^24atoms

7) BaCl2 , moles = mass in g /molar mass Be =200/ 208.3 = = 0.96moles

# atoms = (6.022 *10^23 atoms / 1mole ) *0.96= 5.78 *10^23 atoms sumitsans (23)
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