Chemistry, 30.10.2020 03:30 KittyLoverCat
3. A substance which is made up of two are more different
elements chemically combined is known as *
A. an atom
B. a substance
C. a compound
D. a molecule
Answers: 2
Chemistry, 22.06.2019 12:00
Ican determine the molar mass of an element by looking on the under the atomic mass for the element. for example the molar mass of phosphorus is 30.974 grams/mole. avogadro’s number tells me the amount of representative particles in 1 mole of any substance. this means 12.011 gram sample of carbon and a 32.0 gram sample of sulfur have the same number of atoms.
Answers: 1
Chemistry, 23.06.2019 02:50
Dumbledore decides to gives a surprise demonstration. he starts with a hydrate of na2co3 which has a mass of 4.31 g before heating. after he heats it he finds the mass of the anhydrous compound is found to be 3.22 g. he asks everyone in class to determine the integer x in the hydrate: na2co3·xh2o; you should do this also. round your answer to the nearest integ
Answers: 2
Chemistry, 23.06.2019 15:00
What do we call the rows on the periodic table? a. periodb. familyc. groupd. metals
Answers: 1
3. A substance which is made up of two are more different
elements chemically combined is known as...
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