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A 1.00 carat pure diamond has a mass of 0.2 grams. How many carbon atoms are there within this diamond?
In this example you have 0.2 grams of carbon atoms. The first step is to find out how many moles this is. The molar mass of carbon is 12.01 g/mol,...
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The density of pure gold is $19.3$ $g$$/$$cm^3$. What is the mass of a nugget that has a volume of $1.47$ $cm^3$?
$19.3 g/cancel(cm^3)*1.47cancel(cm^3)~~28.4g$
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What is the volume of 25g of water?
Under normal conditions, $rho_"water"=1.0*g*mL^-1$... And to get the volume of the water we take the quotient... $"Volume of water"=(25.0*cancelg)/(1.0*cancelg*mL^-1)=25.0/(1.0*1/(mL))=??*mL$. Had this question asked ............. $"what is the volume of an...
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Diamonds are measured in carats, and 1 carat = 0.200 g. The density of diamond is 3.51 g /cm, what are the volume and density of the block? The sample is 4.5 carats
$"Mass"$ $=$ $4.5" carat"xx0.200*g*"carat"^-1$ $=$ $0.9*g$. And $"Volume"$ $=$ $"Mass"/rho$ $=$ $(0.9*g)/(3.51*g*cm^-3)$ $=$ $0.26*cm^3$.
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CsBr crystallises in a body-centred cubic (bcc) lattice. The unit cell lengt is 436.6pm. Given that the atomic mass of Cs= 133u and that of Br=80u. What will be the density of CsBr?
a) 0.425g/cm^3
b) 8.25g/cm^3
c) 42.5g/cm^3
d) 4.25g/cm^3
Calculate the mass of one atom of CsBr from the atomic masses of Cs and Br 133u + 80u = 213u 213 g/mol first convert pm to cm. $1"pm" =...
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Diamond has a density of 3.52 g/mL. What is the volume in cubic centimeters of a diamond with a mass of 15.1 g?
$rho,"density"="Mass"/"Volume"$, and thus typically has units of $g*mL^-1, g*cm^-3,$ etc. Here we have $rho=3.52*g*mL^-1$, and the mass, $15.1*g$, and so we take the quotient............... $"Volume"="Mass"/rho=(15.1*g)/(rho_"diamond")=(15.1*g)/(3.52*g*mL^-1)$ $~=4*1/(mL^-1)=4*1/(1/(mL))=4*mL............$ So how much do...
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Calculate the density of a diamond that has a volume of 0.50 cubic centimetres and a mass of 1.75 g?
$"density" = "mass"/"volume"$ so $"density" = "1.75 g"/"0.50 cm"^3$ $"density" = "3.5 g/cm"^3$
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The weight of a diamond is given in carats. One carat is equivalent to 200 mg. A pure diamond is made up entirely of carbon atoms. How many carbon atoms make up a 1.00 carat diamond?
Convert 200 mg to g. $"1000 mg=1 g"$ $200cancel"mg"xx(1"g")/(1000cancel"mg")="0.2 g"$ Convert carats to grams to moles. $"1.00 ct=0.2 g"$ $1"mol C=12.0107 g C"$ $1.00cancel"ct C"xx(0.2cancel"g C")/(1cancel"ct C")xx(1"mol C")/(12.0107cancel"g C")="0.02 mol...
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How do you convert 25g $Fe_2O_3$ to moles?
$(25*g)/(159.69*g*mol^-1)=??mol$
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A 5.0 g sample of a pure compound containing H, C, and N contains .19 g of H and 2.22 g of C. Another smaller sample of this pure compound is analyzed. How many grams of N should be found in the new 2.0 g pure sample?
The idea here is that you need to use the amount of hydrogen and the amount of carbon found in the $"5.0-g"$ sample of this unknown compound to determine the...
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