Suppose you wanted to make 100 grams of water. What is the molar mass of water (H2O)? How many moles of water are in 100 grams? How many moles of hydrogen will you need? How many moles of oxygen will you need? How many grams of hydrogen and oxygen will you need? Hydrogen: Oxygen:

astronomers such as edwin hubble.

the number of protons in the nucleus of a given element. has slight luster and conducts electricity at high temperatures like metal.but like a nonmetal,boron is brittle and does not conduct electricity well at low temperatures. in graphite, carbon is a soft,brittle solid.it is reflective,ductile,or malleable.

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