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OpenStudy (anonymous):

what is the molecular weight (molar mass) of Rb2B4O7?

OpenStudy (anonymous):

326.18g

OpenStudy (anonymous):

how?

OpenStudy (anonymous):

Add the mass of all the different atoms. For example O = 7*16, B = 4x 10...., and Rb= 2*...

OpenStudy (anonymous):

Then it's that number that will equal 1 mole of the substance in this case it's 326.18g equals 1 mole of rb2b4o7

OpenStudy (anonymous):

thank you

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