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Thanks for answering that but I had one more question as in my first post Lastly, more importantly any good sites to teach how to draw Lewis structure I know that there are many sites from google but i somehow don't find it easy to understand thereby any other good sites

So the answer is 16000 g /18.75g And what will the unit for volume be

Thanks but then what is all the decreased mass and all those And they are asking the 'smaller' mass

A uranium alloy has density of 18.75 g/cm3. Find the volume if occupied by a critical mass of 49 kg of this alloy? The critical mass itself can be decreased to 16 kg if the alloy is surrounded by a layer of natural uranium ( neutron reflector). What is the volume of the smaller mass? I am...

Please help urgent Please help, I have few questions 1.Natural gas burns with a yellow flame, a chemical or physical properties? 2.An egg is fried in a skillet, a chemical or physical properties? 3. When iron is dissovled into a acid. Has the iron atoms destroyed? Give answers with...