Verified answer

Yellow Bass is 33% zinc and 67% copper

Cu2(Zn)

(2)63.55 x 65.39 = 192.49 amu

(zinc) 33 / 65.39 amu = .505/ .505 = 1

(copper) 67 / 63.55 amu = 1.054 / .505 = 2

Cu2(Zn)

Wikipedia states:

Yellow brass is an American term for 33% zinc brass.

Molar Mass Of Brass

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RE:

What is the atomic mass or Molar mass of Yellow Brass?

Doing chemistry homework and I cannot find yellow brass MM or At.Mass. If found I'm supposed to put a source does anyone know it?

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I'm afraid my reaction to the command 'calculate the molar mass of the following amount(s) in order to determine which has the greater mass' was one of incredulity. Why on earth would I want to do a stupid thing like that? I know that the atomic weight of sodium is 22.99 on a particular scale for comparing the relative weights of atoms and molecules. On the same scale, the molecular weight of propane (C3H8) is 3*12.01 + 8*1.008 = 44.09 ie about twice that of sodium. Since the number of each is about the same, the sample of propane will clearly be the heavier. That's it, job done. I'm sorry, I'm afraid I despair at times about the lack of clarity in the thinking of those entrusted with the education of our younger generation. I will try to answer the question in the way that was intended. First, the number of moles is a measure of the amount of a sustance, in the sense that one mole of any atomic or molecular substance contains the same number of atoms or molecules. This number is known as Avogadro's constant, and is approximately 6.022 x 10^23. So if you happen to know the number of atoms or molecules in a particular sample, then dividing that figure by Avogadro's constant gives you the number of moles present. Hence 4.02 x 10^30 atoms of sodium are equivalent to 4.02 x 10^30/6.022 x 10^23 = 6.676 x 10^6 moles, and 3.90 x 10^30 molecules of propane are equivalent to 3.90 x 10^30/(6.022 x 10^23) = 6.476 x 10^6 moles. Note that the number of moles does not give you the weight of the sample, because some atoms and molecules are heavier than others, and the mole reflects the number of atomic or molecular particles present. However, Avogadro's constant is determined in such a way that if you multiply the number of moles by the atomic or molecular weight of the substance, you obtain the weight of the sample in grams. So 6.676 x 10^6 moles of sodium will weigh 6.676 x 10^6 x 22.99 = 1.535 x 10^8 g or 1.535 x 10^5 kg. Equally, 6.476 x 10^6 moles of propane will weigh 6.476 x 10^6 x 44.09 = 2.855 x 10^8 g or 2.855 x 10^5 kg. So you can see that the propane weighs about twice as much as the sodium - and you should be aware of the methods you need to convert between these different measures. As an afterthought I should also say that molecular weights are now generally referred to as 'molar masses' with units of grams. If you need one, look up the compound in Wikipedia, and you'll generally find it in the little table on the right at the top of the page. I hope that helps; if you have any questions, feel free to e-mail me.

Yellow brass isn't an element...it is an alloy of copper (MM 63.546) and zinc (MM 65.38). As the zinc content increases, the reddish color becomes yellow. Most suppliers of yellow brass list the copper content in the general range of 55 - 70%.

You need to convert each from atoms/molecules to moles, then from moles to grams. Once you do that, you will see that 3.90X10^30 has the greater mass. You can't tell by just looking at the numbers given to you; you need to convert both to grams first.