BEST ANSWER! ^_^
1) What measure of the quantity of a chemical species ("how much") is not reflected by a counting unit? Explain your answer.
---I was thinking mass? I'm not sure...
2) Consider samples of 2 different elements known to contain their molar mass. What is the same about those samples? Without weighing them, how would you know the molar mass of each?
---I THINK... what is the same about them is... they both are equal to 1 mole? And as for the 2nd part, i could find out the molar mass by looking at the periodic table (the atomic mass) ?
3. Given the "not-a-mole" samples of 2 different compounds, each with the same mass, what will determine the number of moles, and thus and number of molecules of each? What will determine the relative number of each?
PLEASE HELP!!!
1) What measure of the quantity of a chemical species ("how much") is not reflected by a counting unit? Explain your answer.
---I was thinking mass? I'm not sure...
2) Consider samples of 2 different elements known to contain their molar mass. What is the same about those samples? Without weighing them, how would you know the molar mass of each?
---I THINK... what is the same about them is... they both are equal to 1 mole? And as for the 2nd part, i could find out the molar mass by looking at the periodic table (the atomic mass) ?
3. Given the "not-a-mole" samples of 2 different compounds, each with the same mass, what will determine the number of moles, and thus and number of molecules of each? What will determine the relative number of each?
PLEASE HELP!!!
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1) It's asking, I suppose, what portion of the quantity is not shown by the unit (mass, length, etc.). A quantity of a chemical species must be a numerical quantity followed by a counting unit, or the counting unit takes no meaning. However, a number alone also means nothing in chemistry, for we don't know of what. So, it is everything at the same time that it is nothing.
2) The other answer didn't read this right, I believe. The two samples each are matter, take up space and have mass. That's about all that can be deduced as the same. Every element has molar mass. You would know the molar mass of each by knowing its place on the periodic table for one thing, for knowing what element they were. Molar mass is constant to each element, and it IS a quantity. Molar mass is not in moles, it is in g/mol.
3) The number of moles in the samples will depend upon what compound they actually are, because the respective molar mass will be used in calculating their mass (grams) in moles. Moles are determined by knowing how many grams are in a mole of a substance, and the number of molecules requires Avogadro's number (6.022*10^23). To find the number of particles, multiply the number of moles by Avogadro's; particles-->moles you divide by Avogadro's.
Hope this helps!
2) The other answer didn't read this right, I believe. The two samples each are matter, take up space and have mass. That's about all that can be deduced as the same. Every element has molar mass. You would know the molar mass of each by knowing its place on the periodic table for one thing, for knowing what element they were. Molar mass is constant to each element, and it IS a quantity. Molar mass is not in moles, it is in g/mol.
3) The number of moles in the samples will depend upon what compound they actually are, because the respective molar mass will be used in calculating their mass (grams) in moles. Moles are determined by knowing how many grams are in a mole of a substance, and the number of molecules requires Avogadro's number (6.022*10^23). To find the number of particles, multiply the number of moles by Avogadro's; particles-->moles you divide by Avogadro's.
Hope this helps!
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mass is counting atoms, idk the answer to 1
if they contain their molar mass, they contain 1mole of atoms. 1 mole of atoms is the same for any element. 1 mole atoms has a molar mass = protons + neutrons = atomic mass
if you have 2 samples of 2 different compounds but they have the same mass, the number of moles is determined by the mass / molar mass and then multiply by avagadro's number.
if they contain their molar mass, they contain 1mole of atoms. 1 mole of atoms is the same for any element. 1 mole atoms has a molar mass = protons + neutrons = atomic mass
if you have 2 samples of 2 different compounds but they have the same mass, the number of moles is determined by the mass / molar mass and then multiply by avagadro's number.