Red gold is a gold-copper alloy used to make jewelry. A piece of jewelry made of red gold weighs 7.05 g and has a volume of 0.504 cm. Gold has a density of 19.3 g/cm and copper has a density of 8.96 g/cm. Calculate the percentage by mass of each metal in the jewelry. Assume the total volume of the jewelry is the sum of the volumes of the two metals it contains. gold: copper: Pure gold is defined as having 24 carats. When mixed in an alloy, the carats of gold are given as a percentage of this value. For example, a piece of jewelry made with 50% gold has 12 carats. State the purity of this piece of red gold jewelry in carats. purity: carats

Q: It has been estimated that 8.0 × 104 tons of gold (Au)have been mined. Assume gold costs $1350 per…

A: Given that : Mass of gold = 8.0×104 tons Cost of gold = $1350 per troy ounce Worth of gold =? (1…

Q: A student measures the mass of a piece of aluminum, and finds it to be 8.945 g. She finds that the…

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Q: eral contains 5.032 % of a precious metal, by mass. The precious metal as a density of 3.681 g/cm°.…

A: Density = 3.681 g/cm3  Mass % of metal mineral = 5.032%  Density = mass/volume

Q: A chemist must prepare  550.mL  of  60.0mM aqueous potassium dichromate  K2Cr2O7 working…

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Q: A homogeneous mixture was prepared by mixing 0.90 g A, 105.7 g B and 48.17 g C. The volume is found…

A: Given, Volume of mixture = 56.6 cm3 Mass of A = 0.90 g Mass of B = 105 .7 g Mass of C = 48.17 g

Q: Suppose you were given a piece of unknown metal, with a mass of 22.580 g, and a 50-mL graduated…

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Q: Calculate the length in meters of a piece of sheet metal that is 1.50 mm thick and 2.01 meters wide…

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Q: A rectangular block of copper alloy has a mass of 1896 g. The dimensions of the block are 8.4 cm by…

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Q: he level of water in a graduated cylinder measured 48.8 mL. An irregularly-shaped piece of metal was…

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Q: A chemist must prepare 775. mL of 715. mM aqueous barium chloride (BaCl₂) working solution. She'll…

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Q: A chemist must prepare 550. mL of 45.0 mM aqueous copper(II) sulfate (CuSO4) working solution. He'll…

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Q: You have weighed out 24.5685 g irregular solid chips on an aluminum foil and transferred those chips…

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Q: The average density of blood is 1.060 kg/L. The average human body contains 5.00 L of blood. What is…

A: average density of blood = 1.060 kg/Laverage volume of blood = 5.00 Laverage mass of blood = ?

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Q: Gaseous butane (CH3(CH2)2CH3) will react with gaseous oxygen O2 to produce gaseous carbon dioxide…

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Q: A 100.0 mL graduated cylinder was used to measure the volume of water. The initial volume of the…

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Q: An antacid tablet weighing 0.938 g contained calcium carbonate as the active ingredient, in addition…

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Q: A bar of gold with a mass of 2060.5 g has the following dimensions: 7.30 cm by 3.25 cm by 4.50 cm.…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: mass of the necklace

A: This is simply a question of density. As we know that by using concept of density, we can calculate…

Q: Super fine 40-gauge copper wire has a diameter of only 0.080 mm and weighs only 44.5 g/km, Suppose a…

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Q: A stack of paper has a volume of 187 cube inches Now all the sheets are laid out on the floor,…

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Q: 1. A 25 mL flask is known to hold a total volume of 27.64 mL when completely filled. The empty flask…

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Q: Super fine 40-gauge copper wire has a diameter of only 0.080 mm and weighs only 44.5 g/km. Suppose a…

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Q: A piece of metal ore weighs 9.00 g. When a student places it into a graduated cylinder containing…

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Matter and Measurement

In the universe, there is matter, energy, and void space. The universe contains energy and void space. The definition of matter can be considered as something which possesses mass and consumes space. Chemistry is that branch of science which deals with the study of matter. Under chemistry, nature, composition, and the changes occurring to matter are discussed.