Its Long so look below:?
A spy informed me that the goldsmith substituted 100 mg of lead [Pb] for 100 mg of the gold [Au]. he sold the 100 mg of gold for 1000 drachmas. (thats not important lol)
A. If the crown weighs 1.0 kg, what other dimension might have changed?
C. Calculate the density of the king's new crown...
Thanks sooo much if u can helppp!!
also.
How many oxygen molecules are there in a liter of oxygen?
What is the specific heat capacity of water? ice? steam? iron?
Answer:
Density = masss/volume
If the mass changed, then the volume would also.
If the crown is 90% gold at 19.3 g/ml and 10% lead at 11.3g/ml
18.5g/ml
1 mole of any gas occupies 22.4 liters. You have 1/22.4 of a mole. 6.02 x 10^23 molecules per mole.
specific heat of water is 1cal/g
I think ice and steam are .5cal/g
iron .11 cal/g
A. Well since lead is more desnse than gold the volume of the crown will be less than it would have been had it been 100% gold.
C. Add the dencity of 900mg of gold and 100mg of lead together.
A. Volume changed
C. it would be the .9 times the density of gold plus .1 times the density of lead
Molecules of Oxygen: (6.02 * 10^23 molecules per mole) * (1 mole per 22.4 liters) at STP
Heat capacity of water 1.859 kJ/kg*K for ice and water
1.89 for steam, heat capacity is based upon temperature so they would vary if the steam is hotter than 100degrees Centigrade
.450kJ/kg*K for iron
A. lead is less dense so it now occupies more total volume
C. lead density =11.34 g/cm^3
gold density is 19.3 g/cm^3
so (900g/19.3g/cm^3) + (100g / 11.34 g/cm^3) = 55.4 cm^3
1000g/ 55.4cm^3 = new density of 18.05 g/cm^3
at stp 1L is 1/22.4 moles so 6.02E23 * (1/22.4) =0.268E23
omg you need everything handed to you? go look them up online
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