A necklace is 16 % silver by mass. If the necklace weighs 0.05 pounds, how many grams of silver does it contain?
A necklace is 16 % silver by mass. If the necklace weighs 0.05 pounds, how many...
2) A gold necklace contains 0.54 mol of gold. What is its mass in grams? 3) A helium balloon contains 0.56g of He. How many moles of He does it contain? 4) How many Na atoms in 255 g of Na3PO4? 5) Calculate the mass in grams of 6.4 x 102 NO: molecules 6) Determine the number of atoms of O in 84.0 g of CsH1005
There is a 10.0 grams necklace made of 18K gold. K, karat, is a measurement of the fineness (or purity) of gold by Jeweler and gold dealers. Compared with 24K (pure gold), 18K means that the mass percent of gold is = 0.75 (or 75 wt%, we treat it as an exact number here). In another word, that necklace contain 75% gold by mass. If the international gold price today is $1323 (US) per troy ounce, and one troy ounce...
Hi! i think this question is super hard and i cant understand it. it goes like this A goldsmith has a bracelet that weighs 20 grams. Of the weight of the bracelet 60% is gold and 40% silver. a) How many grams of silver does the bracelet contain? The goldsmith will now make a new bracelet with a halved portion of silver, ie a bracelet where the proportion of silver is half as large. The goldsmith will now make a...
If pete (mass =90.00kg) weighs himself and finds that he weighs 30.0 pounds, how far away from the earth is he?
) Tom is a healthy 25-year-old male who weighs 166 pounds, approximately how many grams of protein per day should he have to promote protein equilibrium and meet the RDA for protein for a healthy adult? (show your work)
Profit/bracelet Profit/necklace A 44 66 Saleem B 32 16 A jeweler can make necklaces and bracelets from C 42 19 gold and silver. Demand for bracelets is no more D 81 81 than four. Available ounces of gold are 36 E 16 32 Available ounces of silver are 10 Each bracelet takes 4 oz. of gold and 2 oz. of silver. Each necklace takes 6 oz. of gold and 1 oz. of silver. Bracelets Gold in Silver in Bracelets Necklaces...
(a) An ordinary flea has a mass of 210 ?g. How many Newton’s does it weigh? (b) The mass of a typical froghopper is 12.3 mg. How many newtons does it weigh? (c) A house cat typically weighs 45 N. How many pounds does it weigh and what is its mass in kilograms?
The patient weighs 145 pounds. The doctor orders 8 mg/kg. of Rifampin. How many mg will the nurse give?
. Hannah is 21 years old and pregnant. She is 5’4” and weighs 150 lb. How many grams of protein does Marie need according to her weight? Show your calculations. Grams of protein for Hannah according to weight? Remember to convert her pounds into kilograms (kg): pounds/ 2.2 = kg
how many grams of silver and sulfer are needed to produce 150.0g of silver sulfide?