Chemistry, 19.10.2020 04:01 amandasantiago2001
An unknown element X has the following isotopes: 126X (22.00%
abundant), 128X (34.00% abundant), 130X (44.00% abundant). What is
the average atomic mass in amu of X?
Answers: 3
Chemistry, 22.06.2019 00:00
Alarge marble is dropped in a graduated cylinder with 35ml of water in it.the water level increases to 49ml.what is the volume of the marble
Answers: 1
Chemistry, 22.06.2019 11:00
When hydrochloric acid reacts with potassium hydroxide solution, the following reaction occurs. hcl (aq) + koh (aq) h2o (l) + kcl (aq) the reaction gives off heat energy, so it is an reaction.
Answers: 1
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
An unknown element X has the following isotopes: 126X (22.00%
abundant), 128X (34.00% abundant), 13...
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