Chemistry, 14.07.2019 02:50 mlarsen5000
The average atomic masses of some elements may vary, depending upon the sources of their ores. naturally occurring boron consists of two isotopes with accurately known masses (10b, 10.0129 amu and 11b, 11.0931 amu). the actual atomic mass of boron can vary from 10.807 to 10.819, depending on whether the mineral source is from turkey or the united states. calculate the percent abundances leading to the two values of the average atomic masses of boron from these two countries.
Answers: 1
Chemistry, 23.06.2019 06:40
15. what volume of cci, (d = 1.6 g/cc) contain6.02 x 1025 cci, molecules (ci = 35.5)(1) 10.5 l(2) 250 ml(3) 9.625 l(4) 1.712 lplz answer with step by step explanation
Answers: 1
Chemistry, 23.06.2019 07:30
Which of the following statements best explains why chemistry is testable a) it can measure data by experiments b) it cannot add new evidence c) it cannot be verified d) it is biased
Answers: 1
Chemistry, 23.06.2019 17:00
Select all that apply. when the products of a reaction have less energy than the reactants: the reaction is exothermic. the reaction is endothermic. the reactants lost internal energy. the change in enthalpy is positive.
Answers: 3
The average atomic masses of some elements may vary, depending upon the sources of their ores. natur...
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