# Science quiz question??Watch

Thread starter 10 years ago
#1
You're supposed to use the periodic table for this quiz i think (:

A Roman City - 50 plus oxygen(16), neodymium(144), indium(115), iodine(127), uranium(238) added to a 1 moldm-3 solution.

I put the mass number (atomic mass) of each element in brackets to save you looking them up (: its the bit about the moldm-3 solution that is bugging me. i haven't really learnt about that before :/

thanks everyone, its probably dead easy but i'm just not getting it! :/
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10 years ago
#2
N.B - the atomic number and mass number are different things.

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Thread starter 10 years ago
#3
N.B - the atomic number and mass number are different things.
thanks, i changed it (: xx
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10 years ago
#4
(Original post by lola1993)
You're supposed to use the periodic table for this quiz i think (:

A Roman City - 50 plus oxygen(16), neodymium(144), indium(115), iodine(127), uranium(238) added to a 1 moldm-3 solution.

I put the mass number (atomic mass) of each element in brackets to save you looking them up (: its the bit about the moldm-3 solution that is bugging me. i haven't really learnt about that before :/

thanks everyone, its probably dead easy but i'm just not getting it! :/
I'm not even sure about what the question is asking

But mol dm^-3 is a unit of concentration. If it is 1 mol dm^-3, then there is 1 mole for every dm. There are 1000cm^-3 in 1dm^-3.

If you already knew that and are asking a different question, then that must've sounded very patronising
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Thread starter 10 years ago
#5
If you already knew that and are asking a different question, then that must've sounded very patronising
I didn't so thanks (: Umm we're supposed to use the clues to find the name of a roman city. :/
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10 years ago
#6
not a ******* clue its pissing me off.
i havent got a clue

(at first i thought due to different densities you might get like a greasey stuff, like oil in water or whatever - greasey - Greece. Thats how bad i am - i havent got a clue not even close)
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10 years ago
#7
Is that all the information you were given?
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10 years ago
#8
ahh this is annoying me now. has anyone got any ideas?
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10 years ago
#9
(Original post by lola1993)
A Roman City - 50 plus oxygen(16), neodymium(144), indium(115), iodine(127), uranium(238) added to a 1 moldm-3 solution.
Please type the question EXACTLY as it is. A 1M solution of WHAT, btw? And what is '50 plus'? g, g/mol, mol....
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10 years ago
#10
Type the question exactly as you see it, perhaps then I could make sense of it

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Thread starter 10 years ago
#11
Is that all the information you were given?
Yep, just that and that we're supposed to use the periodic table to help us.
Please type the question EXACTLY as it is. A 1M solution of WHAT, btw? And what is '50 plus'? g, g/mol, mol....
Type the question exactly as you see it, perhaps then I could make sense of it
The exact question is:

A Roman City - 50 plus oxygen, neodymium, indium, iodine, uranium added to a 1 moldm-3 solution.

With most of the other questions, you use the elements symbol or mass number to help you figure out the answer, but this one baffles me! I'm not sure what the '1 moldm-3 solution' thing means at all - the quiz is for the whole school so I guess we haven't covered it yet.

(:
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10 years ago
#12
This sounds like some obscure crossword clue...
Could the 1 mol dm-3 equal M? Could 50 be Sn (which has atomic number 50)? Atomic mass 50 lies between Ti and V...
Sn, O, Nd, In, I, U, M.
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10 years ago
#13
(Original post by michaelyus)
This sounds like some obscure crossword clue...
Could the 1 mol dm-3 equal M? Could 50 be Sn (which has atomic number 50)? Atomic mass 50 lies between Ti and V...
Sn, O, Nd, In, I, U, M.
So the answer would be "S n M"
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10 years ago
#14
Londinium.
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10 years ago
#15
what 50 in roman numerals??
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10 years ago
#16
(Original post by eulerwaswrong)
what 50 in roman numerals??
Apparently that's what the 50 referred to.

L; O, Nd, In, I, U; M
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10 years ago
#17
Londinium
i thought that too
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10 years ago
#18
(Original post by Jelly_Beans_=])
i thought that too
Probably because it's the answer.
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10 years ago
#19
(Original post by Jelly_Beans_=])
could mol/dm3 be m/l (as in litre), so that'd be where the extra m and l come from
L comes from the Roman numeral for 50. M comes from mol dm-3.
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10 years ago
#20
don't worry about the atomic masses.

Think, about the chemical symbols element, and the roman numeral for 50?

got it?
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