Homework Help: chemistry please help me

Posted by cathy on Thursday, November 17, 2011 at 8:46pm.

ComPLETE THE FOLLOWING EQUALITIES

1molBa(OH)2FU=____g Ba(OH)2=____Ba(OH)2FU

1Na atom=______amu Na

i don't understand how to do this ????

chemistry please help me - DrBob222, Thursday, November 17, 2011 at 11:03pm
If FU stands for formula unit, then take the atomic masses from the periodic table and add them.
Ba = 137. something
2*Oxygen = 2*16 = 32
2*hydrogen = 2*1= 2
Then add 137.something + 32 + 2 = ?

For the second one, 1 atom is the atomic mass found on the periodic table in amu. So 22.998 amu is the mass of 1 Na atom.

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