Gold is alloyed with other metals to increase its hardness in making jewelry. You have a piece of jewelry containing only gold and silver, which have pure densities of 19.3 g/cm³ and 10.5 g/cm³ respectively. You measure the piece of jewelry's volume to be 1.25 cm³ and its mass to be 19.9 g. Assuming the total volume of the jewelry is the sum of the volumes of the gold and silver it contains, what is the mass percent of gold in the piece?

Q: A student is determining the density of an unknown metal with a mass of 256.0 g. The student…

A: First, the volume of unknown metal is determined as follows,

Q: A general chemistry student found a chunk of metal in the basement of a friends house. She measured…

A: Density of a metal is specific and constant. Density = mass/volume  1 mL = 1 cm3 Given that: Mass of…

Q: What is the density, in g/mL, of the metal?

A:

Q: Assume a certain adult requires 274 mL of pure oxygen per minute and assume inhaled air contains…

A: Given, A certain adult requires------- 274mL of pure oxygen per minute. The inhaled air…

Q: A citrus dealer in Florida sells boxes of 100 oranges at a roadside stand. The boxes routinelyare…

A: Given data contains, The average weight of orange is 7.2 ounces. Average weight of the boxes is 3.2…

Q: A brick of a certain metal has area on top of 2.15 cm x 5.24 cm. It has mass 1,036 g. How high is…

A: Given that:  Metal area = 2.15cm×5.24cm  Mass = 1.036g  Density = 2.7g/cm3 Density formula : mass ÷…

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: a small block of a metal with a mass of 223.1g when submerged in a beaker containing water, the…

A: Mass of metal = 223.1 g Density of metal = 7.41 g/cm3 = 7.41 g/mL

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

A:

Q: A 330 mg piece of gold (density = 19.3 g/cm3) is hammered into a sheet of gold leaf that has a…

A: Please see the attached image for the solution.  If there are queries or if the image is not…

Q: Beer is often sold by the keg, which has a volume of 15.5 gallons.  How many liters is in a keg?…

A:

Q: the us national institute of standards and technology used mercury gauge as a primary standard for…

A: given, mass of mercury = 225 kilogram = 225000 grams density of mercury = 13.6 g/mL

Q: Gold is alloyed with other metals to increase its hardness in making jewelry. You have a piece of…

A: Given : mass of jewellery = 20.5 g Volume of jewellery = 1.25 cm3 Density of gold = 19.3 g/cm3  And…

Q: What is the volume, in L, of a room that is 8.00 ft x 10.00 ft x 10.0 ft?

A: The volume in liters has to be determined. Some of the common conversion factors that will be useful…

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

A:

Q: A student is determining the density of unknown metal with a mass of 627.0 g. The student partially…

A:

Q: A chemistry student needs 45.0 mL of diethmylamine for an experiment. By consulting  the CRC…

A: Given,Volume of diethylamine = 45.0 mL = 45.0 cm3         (1mL = 1cm3)Density of diethylamine =…

Q: A cylindrical glass tube 20.0 cm in length is filled with acetone. The mass of the acetone to fill…

A: Given that, Cylindrical glass tube, Length (H) = 20.0 cm Radius (R) = ? Mass of acetone (M) = 21.53…

Q: A student performs an experiment to determine the density of a sugar solution. The student obtains…

A: Accuracy is an analytical technique which tells us how close the observed value is to the true…

Q: what mass (in g) of solid lead would displace exactly 234.6 liters of water? The density of the lead…

A: Given : density of lead = 11.4 g/cm3                                                 Volume of water…

Q: Gold is alloyed with other metals to increase its hardness in making jewelery. You have a piece of…

A: Given:Density of pure gold = 19.3 g/cm3Density of pure silver = 10.5 g/cm3Volume of piece of…

Q: Glycerol is a syrupy liquid often used in cosmetics and soaps. A 3.25L sample of pure glycerol has a…

A:

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

A: Given:Mass of coin = 96.51 g.Volume of coin = final volume – initial volumeVolume of coin = 56.0 mL…

Q: The solubility of potassium chromate is 66.9 g per 100 g of water. In an experiment, a student had…

A: The question is based on the concept of solubility. We have to calculate how much solute can be…

Q: A chemistry student needs  10.0g  of methyl acetate for an experiment. By consulting the CRC…

A: Density is a mass per volume ratio. The average density is similar to the total volume of an object.…

Q: The density of aluminum is 2.702 g/cm3. If an aluminum cylinder with a mass of 32.154 g is dropped…

A: SOLUTION Given values, Mass of cylinder = 32.154g Initial volume of water  = 15.9 mL Density of…

Q: A student is determining the density of an unknown metal with a mass of 232.0 g. The student…

A: Given, the mass of unknown metal = 232.0 g Now calculate the volume of unknown metal is determined…

Q: You have three objects of varying shapes and sizes: Object 1 is a rectangular block of tin. Object 2…

A: Given: Volume of aluminum = 436 in3  And density of aluminum i.e. object 2 = 2.70 g/cm3.

Q: One carat is equivalent to a mass of 0.200 g. Use the fact that 1 kg (1000 g) has a weight of 2.205…

A: Given,  The weight of a diamond is 1414 carat.  The weight of a diamond in pounds is:

Q: The mass of a piece of metal is 28.3055 grams. When the piece of metal was dropped into a graduated…

A: Given information: Mass of metal piece = 28.3055 g Initial volume = 7.34 cm3 Final volume = 9.84 cm3

Q: A student wants to determine the density of a metal object. They weigh it and find that its mass is…

A:

Q: In the movie The Italian Job, thieves steal gold bullion. One plan is to carry the ingots of gold…

A: Given : Volume of suitcase = 4.36 x 104 cm3 approx. Density of gold = 19.3 g/cm3  And weight of…

Q: A chemist mixes two liquids, A and B, to form a homogeneous mixture. The densities of the liquids…

A: The density of the metal object can be obtained by using the formula for the mixtures for densities…

Q: Lead metal can be extracted from a mineral called galena, which contains  6.6% lead by mass. A…

A:

Q: A student wishes to determine the density of a solution of lithium hydroxide. He finds the mass of…

A: Interpretation: The mass of the flask is 27.532 g. The flask with water at 22°C ( d = 1.00 g/mL),…

Q: Beer is often sold by the pony keg, which has a volume of 7.75 gallons.  How many liters is this?…

A:

Q: A student is given the following question: "What is the mass of a gold bar that is 7.379 × 10–4 m3…

A: We know,Mass = Density x Volume

Q: Gold is alloyed with other metals to increase its hardness in making jewelry. You have a piece of…

A:

Q: A cylindrical glass tube of length 25.75 cm and radius 2 cm is filled with argon gas. The Empty tube…

A: Given: Length is 25.75 cm. Radius is 2 cm. Weight of empty tube is 186.25 g. Weight of tube with Ar…

Q: Lead metal can be extracted from a mineral called galena, which contains 86.6% lead by mass. A…

A: The volume needed for the sphere is = 4/3*π*(r)3= 4/3*π*(3.0)3= 4/3  * π * ( 27)= 4/3  * 22/7    *…

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.