Typically brass contains 67% (w/w) copper (Cu) and 33% (w/w) zinc (Zn). Find the number of moles of each component (Cu and Zn) contained in a 125 g sample of brass. (Cu = 63.55 g/mol, Zn = 65.38 g/mol)

they are made of gases.

they have a spherical shape.

they make energy through fusion.

yes

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the atomic number of carbon is six, which means that a carbon atom has six protons. carbon has three naturally occurring isotopes: carbon-12, carbon-13, and carbon-14. which of these statements are true about carbon and its isotopes? select all that appl

colorless gas, exhibiting a blue glow when placed in an electric field

b) solid

its a type of rock