Given the following densities at 25C. magnesium:1.7g/cm3 graphite: 1.8g/cm3 iron: 7.9g/cm3
A block of iron has a mass of 826 g. What is the mass of a block of magnesium that has the same volume as the block of iron?
My answer is 178 g Mg. Is this correct?
2007-09-04 02:14:21 · 4 answers · asked by Dan 2 in Science & Mathematics ➔ Chemistry
first let's get the volume of the iron:
826g x 1cc/7.9g = 104.57cc
so the volume of you magnesium which is equal to that of the iron sample would be 104.57cc.
using your given density will get the mass of the magnesium sample:
1.7g/cc x 104.57 = 177.77g or simply 178g.
so yes! your answer is correct! congrats! lol!
2007-09-04 02:28:00 · answer #1 · answered by hennet 2 · 1⤊ 0⤋
one million. A student will develop the temperature of a three hundred cm3 balloon from 30°C to 60°C. what's going to the hot volume of the balloon be? (you would be wanting to be careful with the gadgets.) A. 273 cm3 B. 3 hundred cm3 C. 600 cm3 D. 329 cm3 *I chosen D.* 333/303 * 3 hundred =329.7 2. A field holds a pattern of hydrogen gas at 3 hundred ok. while the temperature decreased to a hundred ok and the rigidity remained consistent, the quantity replaced to one million.0 L. What replaced into the unique volume? A. 3.0 L 3 hundred / a hundred * one million = 3 L B. one million.0 L *I chosen B.* C. 0.3 L D. 0.one million L 3. ***This one I have not any clue*** You learn the gas generated from a reaction utilizing 2 antacid pills with the gas generated from a reaction utilizing 4 antacid pills (evaluate the antacid to be the proscribing reagent). At consistent rigidity and temperature, how do the volumes of the gases learn? A. The gas generated via 4 antacid pills has a greater robust volume. 4 pills factors 2 * as lots CaCO3 as 2 pills to react with HCL generating 2 situations as lots CO2. B. The gas generated via 2 antacid pills has a greater robust volume. C. the two reactions produce the comparable volume of gas. 4. right here question looks on a quiz: "You fill a tank with gas at 60°C to a hundred kPa and seal it. You shrink the temperature to 10°C yet save the quantity consistent. What happens to the rigidity?" A student solutions that the hot rigidity would be 17 kPa. Which of right here motives is authentic? A. the student did no longer remedy for the excellent parameter, and the respond could be 600 kPa. B. the student did no longer artwork with absolute temperatures, and the respond could be 80 5 kPa. *I chosen B. 283/333 * a hundred = 80 5 ok C. the student did no longer remedy for the excellent parameter, and the respond could be 50 kPa. D. the student did no longer artwork with absolute temperatures, and the respond could be 888 kPa. 5. In a situation, you're given 2 pressures and one temperature at consistent volume and volume of gas. you're asked to discover a 2d temperature. What regulation ought to you utilize? A. gay-Lussac's regulation *I chosen A.* B. Boyle's regulation C. Charles's regulation Charles' regulation describes the direct relationship of temperature and volume of a gas. Assuming that rigidity does not substitute, D. Avogadro's regulation
2016-10-09 22:28:01 · answer #2 · answered by conkling 3 · 0⤊ 0⤋
Yes.
2007-09-04 02:23:02 · answer #3 · answered by ag_iitkgp 7 · 0⤊ 0⤋
yup your answer is correct.
2007-09-04 02:21:50 · answer #4 · answered by Anonymous · 1⤊ 0⤋