Nikela

A compound of B and H is found to have a mass percent composition of 81.1% Boron. Its empirical formula is B2H5. A mass spectrometry experiment tells us that the molecular mass is 53.3 g/mol. What is its molecular formula? So I feel like this is a trick q...

You dissolve 6g of Co(ClO4)2 (molar mass: 257.83) in 1 liter of water. Assuming the entire sample dissolves, how many individual perchlorate ions are present in this solution? I'm so lost where to start.

Okay so when I reworked with your help: 10000/(14.5*14.5)=47.56cm

Okay so moles= .0233 0.0233*6.022*10^23=1.403*10^23 1.403*10^23*2=2.806*10^22 Did I get it?