Number of results: 49,090
science
Pure gold has a density of 19.32 g/cm3. How large would a piece of gold be if it had a mass of 483 g?
Wednesday, September 21, 2011 at 11:55pm by Chris
chemistry
assume the volume of an idol is 1.0L, if it were solid gold, what mass would the idol have? is playing catch with the idol plausable? Density of the gold is 19.32 g/cm3
Sunday, April 22, 2012 at 4:47pm by akboyer31
Math
use a plain ol' ratio 241.5/12.5 = x/1 x = 19.32 so gold has a density of 19.32 g/cm^3
Tuesday, January 8, 2013 at 7:50pm by Reiny
physics
Show that for 1 kg of pure gold the volume of water displaced is 51.8 cm^3 I know that the density of pure gold is 19.32 gm/cm^3 so 1 kg/19.32 gm/cm^3= 0.05175 ? I have come along way with this problem and feel like I am close, but now I need help. How do I get kg and gm to ...
Friday, November 21, 2008 at 4:49pm by randy
Chemistry
The density of pure gold is 19.3 g/centimeter cube. A quantity of what appears to be gold has a mass of 465 grams and a volume of 26.5 mL. Is the substance likely to be pure gold? please tell me how you got your answer. Thanks! density = mass/volume You know mass is 465 grams...
Thursday, February 15, 2007 at 6:02pm by Sarah
Physics
A king's crown is said to be solid gold but may be made of lead and covered with gold. when it is weighed in air, the scale reads 0.475 kg. when it is submerged in water the scale reads 0.437 kg.is it solid gold? if not, what percent is mass is gold? (density of gold= 19....
Sunday, May 6, 2012 at 10:07pm by Sarah
Chemistry
Relative atomic mass of F2 = 19 RAM of Sulphur = 32 Mass of fluorine required to form SF6 = 19.9*(6*19)/32 = 70.9 g
Monday, October 26, 2009 at 1:58pm by MathMate
physics
n alloy of copper and gold displaces 1.935 cm^3 of water. It has a mass of 33.44g. If gold has a density of 19.3g/cm^3 and copper has a density of 8.9g/cm^3, what is the percent of gold by mass in the objec
Tuesday, December 11, 2007 at 8:15pm by Anonymous
Physics
An alloy of copper and gold displaces 1.935 cm^3 of water. It has a mass of 33.44g. If gold has a density of 19.3g/cm^3 and copper has a density of 8.9g/cm^3, what is the percent of gold by mass in the object?
Tuesday, December 11, 2007 at 8:15pm by Anonymous
physics
Twenty dollars will buy you 20/36 = 0.556 grams of gold at that price. Calculate the volume that has that mass, buy dividing the mass by the density. It will be easier if you convert the density to 19.32 g/cm^3
Thursday, January 20, 2011 at 10:29pm by drwls
physics
A gold prospector finds a solid rock that is composed solely of quartz and gold. The mass and volume of the rock are, respectively, 13.3 kg and 3.56 × 10-3 m3. The density of gold is 19 300 kg/m3, and the density of quartz is 2660 kg/m3. Find the mass of the gold in the ...
Sunday, March 10, 2013 at 9:08pm by chel
Physics
A gold prospector finds a solid rock that is composed solely of quartz and gold. The mass and volume of the rock are, respectively, 14.8 kg and 1.89 × 10-3 m3. The density of gold is 19 300 kg/m3, and the density of quartz is 2660 kg/m3. Find the mass of the gold in the ...
Monday, November 22, 2010 at 3:33pm by Mike
physics
Gold, which has a density of 19.32 g/cm^3, is the most ductile metal and can be pressed into a thin leaf or drawn out into a long fiber. (a) If a sample of gold with a mass of 6.710 g, is pressed into a leaf of 1.661 μm thickness, what is the area (in m^2) of the leaf...
Wednesday, January 26, 2011 at 7:04pm by sagara
physics
Gold, which has a density of 19.32 g/cm3, is the most ductile metal and can be pressed into a thin leaf or drawn out into a long fiber. (a) If a sample of gold with a mass of 8.464 g, is pressed into a leaf of 5.036 ìm thickness, what is the area (in m2) of the leaf? (b...
Thursday, September 1, 2011 at 8:35pm by jessica
physics
The British Sovereign coin is an alloy of gold and copper having a total mass of 7.988 g and is 22-karat gold. (a) Find the mass of gold in kg using that # of karats = 24 x (mass of gold)/(total mass). (b) Calculate the volumes of gold and copper used to manufacture the coin...
Monday, February 4, 2013 at 11:05am by anon
Algebra
The purity of gold is measured in karats. Twenty-four karat gold is pure gold and k karat gold is k/24 gold by mass. One piece of 16-karat gold jewelry has a mass of 30 grams and another piece of 10-karat gold jewelry has a mass of 40 grams. Find the number of grams in the ...
Wednesday, January 26, 2011 at 10:18pm by Laur
Sorry, Here's another question plus work
1. Gold, has a mass of 19.32g for wach cubic centimeter of volume, is most ductile metal and can be pressed into a thin leaf or drawn out into long fiber. -If a sample of gold, with a mass of 27.63g is pressed into a leaf of 1.000micometers thickness, what is the area of the ...
Thursday, August 31, 2006 at 3:47pm by krystal
chemistry
total mass 9.85 grms and total volume 0.65 cm ^3 . The jewlry contain only gold and silver which has densities 19.3 g/cm^3 amd 10.5 g/cm^3.calculate the % of mass of gold in jewellery
Saturday, February 12, 2011 at 9:00pm by manisha
math
The amount of gold jewelry and other products is measured in karats (K), where 24K represents pure gold. The mark 14K on a chain indicates that the ratio between the mass of the gold in the chain and the mass of the chain is . If a gold ring is marked 18K and it weighs 0.4 oz...
Wednesday, March 17, 2010 at 10:14am by kirk
Chemistry
Calculate the mass of a sample of gold that ocupies 5.0x 10 negative 3 power cm3. the density of gold is 19.3 g/cm3
Tuesday, August 26, 2008 at 5:51pm by Kiersten
Algebra 2
The purity of gold is measured in karats. Twenty-four karat gold is pure gold and k karat gold is k/24 gold by mass. One piece of 16-karat gld jewelry has a mass of 30 grams and another piece of 10-karat gold jewelry has a mass of 40 grams. Find the number of grams in the ...
Sunday, January 30, 2011 at 4:39pm by Jay
Adut education
The amount of gold jewelry and other products is measured in karats (K), where 24K represents pure gold. The mark 14K on a chain indicates that the ratio between the mass of the gold in the chain and the mass of the chain is 14:24 If a gold ring is marked 18K and it weighs 0.4...
Sunday, October 18, 2009 at 7:09pm by debbie
Physics
Add the vectors. Break them up into components. 32.5km @45deg= 32.5*sin45 N + 32.5*cos 45 E add that to 19.5E 32.5*sin45N + (32.5*.707+19.5)E I assume you can take if from here.
Tuesday, September 28, 2010 at 8:42pm by bobpursley
Chemistry
A thief uses a bag of sand to replace a gold statue that sits on a weight sensitive alarmed pedestal. The bag of sand and the statue have exactly the same volume 1.75 L. Assume that the mass of the bag is negligible. A) calculate the mass. ( density of gold = 19.3 g/cm3
Sunday, October 9, 2011 at 3:52pm by Monique
Thank you Ann (kinematics)
Thank you Ann! I had the equations and really was closing in on the answer... (stopping for 23 s is what really got me confused) in either case, the displacement for a) is 888 m ! Now I'll try to calculate (b). Thank you much! P.S. This is in response to my earlier physics...
Wednesday, January 31, 2007 at 10:11pm by eric (new chem or physics prob. in)
physics
A 19.3- gmass of gold in the form of a cube is 1.00 cmlong on each side (somewhat smaller than a sugar cube).What would be the length of the sides of a cube having four times this mass of gold?
Saturday, March 24, 2012 at 3:31pm by jim
physics
A 19.3- gmass of gold in the form of a cube is 1.00 cmlong on each side (somewhat smaller than a sugar cube).What would be the length of the sides of a cube having four times this mass of gold?
Thursday, March 22, 2012 at 7:08pm by jim
physics
gold and silver have densities of 19.3 and 10.5 grams per cubic centimer, respectively. If you have eual volumes of each, which one will have the larger mass? I am thinking the gold. how do i prove it? Thank you
Sunday, April 24, 2011 at 6:28pm by Loui
Chemistry
The density of gold is 19.3 g/cc (g/ml). If a gold rod has a diameter of 4.20cm and 8.0 cm long. What is the mass? I just need to know if I did this right... r= 2.1 3.14 x 2.1^2 x 8.0 = 110.835g 19.3 g/cc x 110.835g = 2139.12 g/ml m = 2139.12
Sunday, February 3, 2008 at 6:59pm by j
physics
Buoyant force = (Water density) x (gold volume)x g The volume of the gold is (mass)/(gold density)= 3.11*10^-5 m^3 The density of water is 1000 kg/m^3 The answer will be in Newtons after multiplying by g. This is obviously not a tooth crown - At 0.6 kg, it would weigh 19 oz. ...
Friday, April 8, 2011 at 12:46pm by drwls
principles of physics
A 19.3- gmass of gold in the form of a cube is 1.00 cmlong on each side (somewhat smaller than a sugar cube).What would be the length of the sides of a cube having four times this mass of gold?
Wednesday, March 21, 2012 at 7:37pm by Christie
8th Grade Science
If we say that gold has a density of 19.32 g/ml, at what temperature is this substance?
Wednesday, April 1, 2009 at 6:50pm by Mark
chem
How many gold atoms are in an 0.408 ounce, 18 gold bracelet? (18 gold is 75% gold by mass.)
Monday, September 19, 2011 at 6:00am by tiffany
Chemistry
Gold is alloyed with other metals to increase its hardness in making jewelry. Consider a piece of gold jewelry that weighs 9.85 g and has a colume of 0.675 cm cubed. The jewelry contains only gold and silver, which have densities of 19.3 g/cm cubed and 10.5 g/cm cubed, ...
Monday, July 25, 2005 at 12:38pm by william
College Chemistry/Lab Math
This is good, but mass/volume %= (g/mL)*100 So, (0.10 % w/v)/100 = 0.001 g gold (in 1 ml) And so, (0.001g gold)/(1 ml + 9 ml) = 0.0001g of gold/mL ****Don't worry about mass/volume % at this point. But now you have a solution that is 0.0001g of gold/mL You remove 0.5mL of ...
Sunday, March 17, 2013 at 1:46pm by Devron
physics
a piece of gold aluminuim alloy weighs 100g in air and 80g in water.what is the weight of the gold in the alloy if the relative density of gold is 19.3 and that of aluminium is 2.5
Friday, May 21, 2010 at 12:51am by onda
Chemistry
A chemist wants to extract the gold from 15.0g of gold(II) chloride dihydrate, AuCl3 x 2H20, What mass of gold could be obtained from this sample? Also how would you find the molar mass of of 2H20 with the coefficient 2 in front?
Tuesday, April 5, 2011 at 11:54pm by Anonymous
Physiology
Pure gold has a density of 19 g/ml. If you bought a gold ring and found it had a volume of 0.3 ml and it weighed 5.7 grams, is it real gold? Show me your calculation
Thursday, January 27, 2011 at 2:45am by Jerome
Physics, Desperate Need of help!
Gold, has a mass of 19.32g for wach cubic centimeter of volume, is most ductile metal and can be pressed into a thin leaf or drawn out into long fiber. -If a sample of gold, with a mass of 27.63g is pressed into a leaf of 1.000micometers thickness, what is the area of the leaf...
Thursday, August 31, 2006 at 3:22pm by krystal
Chemistry
Easier example is HF. H atomic mass = 1 F atom mass = 19 HF molar mass = 20 %Hydrogen = (1/20)*100 = 5% %Fluorine = (19/20)*100 = 95% Note that 5% + 95% = 100% H2SO4: H = 1 and 2*1 = 2 S = 32 O = 16 and 4*16 = 64 molar mass = 2+32+64 = 98 %hydrogen = (2/98)*100 = 2.04% %sulfur...
Wednesday, March 27, 2013 at 11:16pm by DrBob222
beginning chemistry
750.0g Au (cm^3/19.3 g)= ? the value you multiply the grams of gold with is the density of gold which is (19.3g/cm^3). Remember that when finding the volume, you can use density to find it.
Tuesday, March 11, 2008 at 10:16pm by ~christina~
Physics
The "karat" is a dimensionless unit that is used to indicate the proportion of gold in a gold-containing alloy. An alloy that is one karat gold contains a weight of pure gold that is one part in twenty-four. What is the volume of gold in a 20.0 karat gold necklace ...
Thursday, April 5, 2007 at 11:06pm by Mary
Physics. Need urgent help.
A scuba diver searches for treasure at a depth of 20.0m below the surface of the sea. at what pressure must the scuba device deliver air to the diver? (density of sea water= 1030kg/m^3;atmospheric pressure= 1.013x10^5 pa) another one A king's crown is said to be solid gold...
Sunday, May 6, 2012 at 11:05pm by Dan
Chemistry
oh...sorry a)Determine the mass of gold that can be extracted if 27.1 g sodium cyanide is used. and b)If the mass of the ore from which the gold was extracted is 126.5 g, what percentage of the ore is gold?
Tuesday, February 9, 2010 at 6:42pm by Amy
Physics, still don't get it!
The "karat" is a dimensionless unit that is used to indicate the proportion of gold in a gold-containing alloy. An alloy that is one karat gold contains a weight of pure gold that is one part in twenty-four. What is the volume of gold in a 20.0 karat gold necklace ...
Monday, April 9, 2007 at 12:33am by Mary
Chemistry
A chemist wants to extract the gold from 15.0g of gold(II) chloride dihydrate, AuCl3 • 2H20, What mass of gold could be obtained from this sample?
Tuesday, April 5, 2011 at 11:18pm by Anonymous
chemistry
silver has density of 10.5 g/cm3 and gold has a density of 193.g/cm3 which liquid is denser silver and gold are liquids? That's news to me. You're given the ratios for density, which ratio is greater 10.5gm/cm^3 or 193gm/cm^3? It appears gold is over 18 times as dense ...
Sunday, September 10, 2006 at 5:57pm by delonte
physics
According to legend, to determine whether the king's crown was made of pure gold, Archimedes measured the crown's volume by determining how much water it displaced. The density of gold is 19.3 g/cm^3. If the crown's mass was 6.00 * 10^2g, what volume of water would...
Monday, February 16, 2009 at 10:38am by y912f
physics
mass gold+mass quartz=13.3 massgold/densitygold+massquartz/densityquartz=3.56E-3 you have two equations, two unknowns, solve for mass gold
Sunday, March 10, 2013 at 9:08pm by bobpursley
Chemistry
well my question is the same as amy's but mine says: Determine the mass of gold that can be extracted if 24.7 g sodium cyanide is used. and If the mass of the ore from which the gold was extracted is 129.5 g, what percentage of the ore is gold? but i tried her numbers. ...
Tuesday, February 9, 2010 at 6:42pm by c
chem
Steps are 0.408 oz x 0.75 give masss of gold convert the mass in oz to mass in g (say =X) Look up molar mass for gold (say =M) number of moles of gold is then X/M If Avogadro's Number =N (number of atoms per mole) then the number of atoms is XN/M
Monday, September 19, 2011 at 6:00am by Dr Russ
physics
1 kg = 1,000 grams so 1,000 grams (1 cm^3/19.32 grams) = 51.8 cm^3 always multiply by a ratio that is the same top and bottom but in different units so that the units cancel for example if I were given this the other way as 51.8 cm^3 of gold, then 51.8 cm^3 (19.32 grams/1cm^3...
Friday, November 21, 2008 at 4:49pm by Damon
Physics
how do i write an equation showing that mass as a function of volume for gold? table shows volume (cm^3) 1.0 2.0 3.0 4.0 5.0 mass(g) 19.4 38.6 58.1 77.4 96.5
Monday, October 12, 2009 at 9:35am by MacKenzie
CHEMISTRYYYY HELP
A sample of gold ore contains 22.0 g of gold metal per 100kg of ore. If gold has a market value of $350.00 per oz., what mass of ore, in tons, must be refined to get one million dollars worth of pure gold?
Monday, September 26, 2011 at 6:56pm by Andrea
Chemistry
Silver has a density of 10.5 g/cm3 and gold has a density of 19.3 g/cm3. Which would have a greater mass, 5 cm3 of silver or 5 cm3 of gold
Thursday, September 1, 2011 at 10:21pm by Monique
Chemistry
To extract gold from its ore, the ore is treated with sodium cyanide solution in the presence of oxygen and water. 4 Au(s) + 8 NaCN(aq) + O2(g) + 2 H2O(l) 4 NaAu(CN)2(aq) + 4 NaOH(aq) (a) Determine the mass of gold that can be extracted if 21.4 g sodium cyanide is used. If the...
Saturday, February 19, 2011 at 3:37pm by Dovahkiin
Chemistry
To extract gold from its ore, the ore is treated with sodium cyanide solution in the presence of oxygen and water. 4 Au(s) + 8 NaCN(aq) + O2(g) + 2 H2O(l) 4 NaAu(CN)2(aq) + 4 NaOH(aq) Determine the mass of gold that can be extracted if 27.4 g sodium cyanide is used. If the ...
Tuesday, February 9, 2010 at 2:44pm by tdb
chemistry
To extract gold from its ore, the ore is treated with sodium cyanide solution in the presence of oxygen and water. 4 Au(s) + 8 NaCN(aq) + O2(g) + 2 H2O(l) 4 NaAu(CN)2(aq) + 4 NaOH(aq) Determine the mass of gold that can be extracted if 27.4 g sodium cyanide is used. If the ...
Sunday, February 7, 2010 at 5:38pm by tg
Chemestry
To extract gold from its ore, the ore is treated with sodium cyanide solution in the presence of oxygen and water. 4 Au(s) + 8 NaCN(aq) + O2(g) + 2 H2O(l) 4 NaAu(CN)2(aq) + 4 NaOH(aq) (a) Determine the mass of gold that can be extracted if 29.3 g sodium cyanide is used. (b) If...
Wednesday, February 6, 2013 at 9:09pm by Kenah Smith
Chemestry
To extract gold from its ore, the ore is treated with sodium cyanide solution in the presence of oxygen and water. 4 Au(s) + 8 NaCN(aq) + O2(g) + 2 H2O(l) 4 NaAu(CN)2(aq) + 4 NaOH(aq) (a) Determine the mass of gold that can be extracted if 29.3 g sodium cyanide is used. (b) If...
Wednesday, February 6, 2013 at 8:54pm by Kenah Smith
Chemestry
To extract gold from its ore, the ore is treated with sodium cyanide solution in the presence of oxygen and water. 4 Au(s) + 8 NaCN(aq) + O2(g) + 2 H2O(l) 4 NaAu(CN)2(aq) + 4 NaOH(aq) (a) Determine the mass of gold that can be extracted if 29.3 g sodium cyanide is used. (b) If...
Wednesday, February 6, 2013 at 7:49pm by Kenah Smith
physics
On your wedding day your lover gives you a gold ring of mass 3.68 g. 54 years later its mass is 3.28 g. On the average how many atoms were abrated from the ring during each second of your marriage? The atomic mass of gold is 197 u.
Saturday, August 25, 2012 at 12:58pm by Simone
Physics
On your wedding day your lover gives you a gold ring of mass 3.78 g. 50 years later its mass is 3.16 g. On the average how many atoms were abrated from the ring during each second of your marriage? The atomic mass of gold is 197 u
Thursday, August 23, 2012 at 7:10am by Sara
math
18K gold is 18/24 = 75% gold, by mass. A 0.4 oz 18K ring therefore contains 0.3 oz of gold. Multiply 0.3 oz by $300/oz for the gold value in the ring. The other 0.1 oz is probably copper of negligible value. That is a rather outdated question. Gold is worth $1100/oz these days.
Wednesday, March 17, 2010 at 10:14am by drwls
physics
the density of gold is 19.3 x 10^3, what buoyant force does a .60-kg gold crown experience when it is immersed in water?
Sunday, April 10, 2011 at 10:36pm by lame
chemistry
zinc displaces gold in seawater present int he form of gold (III) hydroxide. What mass of gold can be recovered if 20 moles of zinc are available?
Monday, July 25, 2011 at 8:52pm by luz
chemistry
If a 190 mg piece of gold (density =19.32 g/cm^3) is hammered into a sheet measuring 2.3 x 1.0 ft, what is the average thickness of the sheet in meters?
Wednesday, March 2, 2011 at 2:00am by Jen
chemistry
Archimedes used density along with mass and volume of alloys (mixtures) of gold and silver to determine the percent of gold (and also silver) in these alloys by simple, non-destructive measurements. Prove that the mass of gold in a given mass of silver alloy is given by the ...
Monday, September 26, 2011 at 2:11am by mitchell
geometry
PLEASE HELP ME! i have this homework due tomorrow and i only have 1 question left and am sooo desperate for an answer: The diameter of the Dome of the Rock in Jerusalem is 20m. If it is plated with gold that is 5cm thick, find the cost of plating the dome in gold given that ...
Thursday, January 27, 2011 at 7:17am by CJ
physical science
mass = volume x density. mass = 1000 g density of gold is 19.3 g/cc Solve for volume.
Sunday, February 24, 2008 at 5:53pm by DrBob222
Chemistry
1 mol F has a mass of 19.00 g and there are 6.02 x 10^23 atoms in that mass. Therefore, 19.00 x (3.011 x 10^12/6.02 x 10^23)= ?? The second one is done the same way. Look up the mass of Mg in the periodic table. I think it is 24.32 g/mol.
Tuesday, October 2, 2007 at 10:21pm by DrBob222
Math
a. (13-2)/32 = b. @1000 it had 11/32. @20000 it had 5/32. So after 19,000 it lost 6/32. It needs to lose another 3/32 to be "worn out". You should be able to see the number of miles from that.
Tuesday, October 13, 2009 at 10:57pm by jim
chemistry
At 25 degrees celsius, the dimensions of a rectangular block of gold are 4.42 cm by 3.07 cm by 2.63 cm. The mass of the gold is 689g. I found that the density is 19.3g/cm^3 at 25 degrees but how will the density change if the temperature is increased to 125 degrees?
Thursday, September 30, 2010 at 7:31pm by kate
chemistry
what would be the mass of an Au sample whose volume is 2.85mL?( the density of gold is 19.3g/mL)
Sunday, October 3, 2010 at 12:01am by Jazz
chemistry
what would be the mass of an Au sample whose volume is 2.85mL?( the density of gold is 19.3g/mL)
Sunday, October 3, 2010 at 12:00am by Jazz
Physics - Center of Mass
A 32-cm-by-32-cm checkerboard has a mass of 120 g. There are four 19-g checkers located on the checkerboard, as shown in the figure. Relative to the origin located at the bottom left corner of the checkerboard, where is the center of mass of the checkerboard-checkers system?
Saturday, June 16, 2012 at 7:41pm by Newman
chemistry
Treatment of gold metal with BrF3 and KF produces Br2 and KAuF4, a salt of gold. Find the mass of the gold salt that forms when a 73.0 -g mixture of equal masses of all three reactants is prepared.
Tuesday, November 2, 2010 at 8:22pm by john
physical science
A 50.g bracelet is suspected pf being gold plated lead instead of pure gold. It was dropped into a full to the rim glass of water and 4cm to the third power overflowed. Is the the bracelet pure gold. Explain. (Density of gold=19 g/cm to the third power and lead=11 g/cm to the ...
Tuesday, July 8, 2008 at 7:03pm by sayra
chemistry - synthesis of aspirin
This is an experiment for a synthesis of aspirin lab mass of salicylic acid = 2.005 g mass of acetic acid = ? moles of acetic acid = ? volume of acetic anhydride = 4 ml mass of acetic anhydride (Use 1.08 g/ml for the liquid density) = (1.08 g/ml) (4 ml) = 4.32 g moles of ...
Saturday, April 7, 2012 at 8:32pm by Priscilla
Math
Before 1986, a gold bullion in the Federal Reserve Bank was rectangular and had a volume of approximately 727.7 cm3. The density of gold is 19.3 g/cm3. A pound is approximately 454 g. Find the weight of one gold bullion to the nearest tenth of a pound.
Wednesday, January 9, 2013 at 8:31pm by Bob
science
density: Tungsten: 19.25 g/cm^3 Gold: 19.282 g/cm^3 Platinum: 21.46 g/cm^3 So, for example, to produce exactly the same density as a pure gold coin, one would just need to create an alloy consisting of 98.55% tungsten and 1.45% platinum.
Monday, July 9, 2012 at 10:57am by Steve
physics
The density of gold is 19.3 x 10^3 kg/m^3. What buoyant force does a .6 kg gold crown experience when it is immersed in water?
Friday, April 8, 2011 at 12:46pm by vicki
math
a n = - 2 ( n - 3 ) n = 19 a 19 = - 2 ( 19 - 3 ) a 19 = - 2 * 16 a 19 = - 32
Thursday, March 1, 2012 at 11:37pm by Bosnian
Intro to chem
You used the atomic weight of Oxygen and not the molar mass (molecular weight). 19.7/32 = 0.6156 moles V = 0.6156*0.08206*273/ = 13.79L which rounds to 13.8L. There is another way to do this which is a little easier if you remember that a mole of any gas occupies 22.4L at STP...
Thursday, April 14, 2011 at 1:15pm by DrBob222
College Chemistry/Lab Math
Thank you for catching that. 0.0001g of gold/mL *(0.50mL)=0.00005g of gold Your new concentration will be 0.00005g of gold/total volume=0.00005g of gold/0.60mL=8.33 x 10^-5 g of gold/mL or 8.33 x 10^-5 g of gold/mL*(100)=8.33 x 10^-3 % m/v So, each test uses 0.00005g of gold 0...
Sunday, March 17, 2013 at 1:46pm by Devron
refining
If I have a solution of gold chloride, is there a was I can grow metalic gold crystals to recover the gold instead of using sulfer dioxide to drop the gold as poeder?
Sunday, February 12, 2012 at 8:52am by art
chem
gold hasa density of 19 g/cm^3 if an 18 inch necklace is made of pure gold how much would it weigh in grams if it is 1 cm wide and 1 mm thick
Wednesday, March 16, 2011 at 9:09pm by hillary
Physics
Rutherford, Geiger, and Marsden (his students) fired a beam of alpha particles at a gold foil. The alpha particles had an energy of about 3.6 million electron volts, a charge of +2e, and a mass of about four AMU (one Atomic Mass Unit is 1.66 x 10-27 kg. Gold has atomic number ...
Sunday, February 10, 2013 at 8:43pm by Youssef
Chemistry
Calculate the mass in grams for a gold sample that absorbs 245J to change its temperature from 19 degrees to 49 degrees
Saturday, March 5, 2011 at 6:20pm by Wendy
physics
A prospector finds a solid rock composed of granite ( = 2650 kg/m3) and gold. The volume of the rock is 3.05 10-4 m3 and its mass is 3.57 kg. What mass of gold is contained in the rock? I thought that I could used some ratio, but I have no idea how. Our teacher hasn't even...
Tuesday, June 19, 2007 at 11:41am by JJ14
Physics
KE = 1.72 eV =1.72•1.6•10^-19 =2.76•10^-19 J. ε = h•c/λ = =6.63•10^-34•3•10^8 /391•10^-9 = =5.08•10^-19 J Einstein's photoelectric equation: ε =W + KE, Work function is W = ε – KE = = 5....
Friday, May 11, 2012 at 10:02pm by Elena
science
I am wondering what you mean by "extract"? Aluminum is cheaper than gold becuause Bauxite is plentiful, and gold ore is rare. In the best gold ores, there is only 3 percent gold.
Monday, September 27, 2010 at 12:18pm by bobpursley
math
original vote: kate ---- x lee ------x+32 new vote: number of swing votes --- y kate --- x+y lee -----x+32 - y kate - lee = 6 x+y - (x+32-y) = 6 x+y-x-32x+xy = 6 2y = 38 y = 19 19 voters switched
Sunday, October 21, 2012 at 9:12pm by Reiny
math
An arcade uses 3 different colored tokens for their game machines. For $20 you can purchase any of the following mixtures of tokens: 14 gold, 20 silver, and 24 bronze; OR, 20 gold, 15 silver, and 19 bronze; OR, 30 gold, 5 silver, and 13 bronze. What is the monetary value of ...
Friday, October 28, 2011 at 10:41am by laurie
Beginning Chemistry
Multiply the volume (which you already know is 500 cm^3) by the density or specific gravity of gold. The density of solid gold is 19.3 g/cm^3.
Tuesday, March 11, 2008 at 8:23pm by drwls
college physics
If I travel to Mexico and buy a 55g gold braclet for 20 dollars and take the braclet and submerge it in water starting out with 50cc and after it is submerged in the water it is 52.8cc. What is the buoyant force on the braclet? I also need to know if the braclet is real gold. ...
Monday, March 18, 2013 at 1:07pm by patti
Probability Distribution
Prob red = 15/34 prob white = 19/34 when picking three: prob(0 red) = C(3,0) (19/34)(18/33)(17/32) = 57/352 prob(1 red) = C(3,1) (15/34)(19/33)(18/32) = 2565/5984 prob(2red) = C(3,2) (15/34)(14/33)(19/32) = 1998/5984 prob (3red) = C(3,3)(15/34)(14/33)(13/32) = 455/5984 notice ...
Saturday, April 7, 2012 at 1:59pm by Reiny
chemistry
Calculate the total mass of gold needed to react with 4200g of chlorine to make 7112g of gold(iii) chloride?
Monday, January 17, 2011 at 2:20pm by naseeb
Physics
The karat is a dimensionless unit that is used to indicate the proportion of gold in a gold-containing alloy. An alloy that is one karat gold contains a weight of pure gold that is one part in twenty-four. What is the volume of gold in a 20.0-karat gold necklace whose weight ...
Monday, November 8, 2010 at 8:48pm by Sarah
science
The addition of copper to gold is a way to decrease the amount of gold in an object (actually it decreases the percent gold in the product). 24-k gold is pure gold (100%) so 14-k, a popular gold content, is a little more than 50% gold so the object can be sold for less than if...
Saturday, November 7, 2009 at 4:02pm by DrBob222
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