B How Do You Calculate the Total Mass in Kilograms from Atomic Mass Units?

Nick Jarvis
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I have a complete brain freeze sorry, and cannot work this out.

I have a helium atom of 4.0 amu and there are 6.0 x 10^24 atoms. How do I calculate the total mass in kg please?

Thanks
 
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1 amu = 1.66053904 x 10-27 kg
 
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