Aunt Julie went to the jewelry store to buy a gift for her amiga. As an aunt from Poveda, she knows that the karat scale is based on mass percentages. She was also informed by Uncle Bruno that pure gold is equivalent to 24 karats. If she bought a bracelet made of gold alloy that is 50 mol % silver and 50 mol % gold, what is the karat number of the bracelet?

Aunt Julie went to the jewelry store to buy a gift for her amiga. As an aunt from Poveda, she knows that the karat scale is based on mass percentages. She was also informed by Uncle Bruno that pure gold is equivalent to 24 karats. If she bought a bracelet made of gold alloy that is 50 mol % silver and 50 mol % gold, what is the karat number of the bracelet?

Chemistry: Matter and Change

1st Edition

ISBN:9780078746376

Author:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom

Publisher:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom

Chapter7: Ionic Compounds And Metals

Section: Chapter Questions

Problem 96A

See similar textbooks

Similar questions

Silicon crystallizes in a cubic structure. If the edge length of the unit cell is 543 pm and the density of the crystal is 2.33 g/cm3, how many Si atoms are in one unit cell?
Determinate the molar mass of C6H12O6 ?
Define the term Interconverting Masses?
Describe the PHYSICAL PROPERTIES of the following Specifically, what type of matter is this? (e.g. halogen) substances (a) Potassium dichromate (Б) Glucose (C6H12O6) (c) Magnesium (d) Bromine, Br2 (e) NISO4-6H2O (f) Sulfur (g) lodine, I2 (h) Pbl2 (i) Copper () Stainless steel (k) Ethanol, C2H5OH (1) Zinc (m) |Hydrochloric acid (n) Aluminum (0) Ice
Phosphorus trichloride is important in the manufacture of insecticides, fuel additives, and flame retardants. Phosphorushas only one naturally occurring isotope, ³¹P, whereas chlorinehas two, ³⁵Cl (75%) and ³⁷Cl (25%). (a) What different molecu-lar masses (amu) can be found for PCl₃? (b) Which is the mostabundant? (c) What is the ratio of the effusion rates of the heavi-est and the lightest PCl₃ molecules?
1- Alum used in cooking is potassium aluminum sulfate hydrate, KAl(SO4)2. XH2O. To find thevalue of X, you can heat the sample of compound. Assume you heat 4.74 g of the hydratedcompound and that sample loses 2.16 g of water. What is the value of X?
There are three isotopes of Silicon. They have mass number of si^28 (27.976927) relative abundance of 92.2297; Si^29 (28.976495) relative abundance of 4.6832 ; Si^30 (29.973770) relative abundance of 3.0872. Given: Formula: Unknown: Solution:
Kk.288.
student found a bottle of unknown origin in the basement of an "CAUTION—contains С₁H₁O.” No other A old house. The bottle was labelled information was given, but inside the bottle were some white crystals. The student took the bottle to a chemistry laboratory, where she analyzed the crystals with the help of the laboratory staff. C₁2H₁6O reacted with Br₂ in CCl4 adding one mole of Br, and forming C₁₂H₁OB2₂. When a sample of C₁₂H₂O was reacted with O3 followed by Zn/H₂O, two different samples, J and K, were obtained. Compound J had a molecular formula of C.HgO₂, and its NMR is shown below. Compound K had a molecular formula of C₂H₂O, and it could be oxidized to compound L, with a molecular formula of C₂H₂O₂. The IR spectrum of L showed a very wide, strong band centred around 3000 cm*¹. The NMR spectrum of L showed only two different absorptions: a doublet (6H) at 0.9 ppm and a septet (1H) at 3.6 ppm. There was also a singlet (1H) off the scale at 11.8 ppm. students, deduce possible…
I3 l'and Fe", Fe
1PrqdNDx-hBYyzKo-xfiM9-Jlq7EAaWe3GBt t3U3jDo/edit ulator O A Land of Permane... it was seconds ago - UA E- EE 2 Al + 3 H,SO, 6. How many grams of hydrogen gas are produced with 0.S8 moles of aluminum sulfate? 3 H, + Al,(SO); 0.88 moles Al (SO), 3 moles H. 6 g H. 0.88 moles Al (SO), 1 mole H.
What is the composition, in atom percent, of an alloy that contains a) 35 g copper and b) 49 g zinc? The atomic weights for zinc and copper are 65.41 and 63.55 g/mol, respectively.