Chemistry, 27.10.2020 01:00 brandyrushing3
12. A 100.00-gram sample of naturally occurring boron
contains 19.78 grams of boron-10 (atomic mass =
10.01 atomic mass units) and 80.22 grams of
boron-11 (atomic mass = 11.01 atomic mass units).
Which numerical setup can be used to determine the
atomic mass of naturally occurring boron?
A) (0.1978)(10.01) + (0.8022)(11.01)
B) (0.8022)(10.01) + (0.1978)(11.01)
C) (0.1978)(10.01)/(0.8022)(11.01)
D) (0.8022)(10.01)/(0.1978)(11.01)
Answers: 2
Chemistry, 21.06.2019 16:00
Select the correct answer. you have a nightlight plugged into an outlet in the hallway, which uses 3.5 watts when plugged in. if the house circuit provides 120.0 volts, what is the current through this bulb?
Answers: 1
Chemistry, 22.06.2019 04:30
In which phase(s) do the molecules take the shape of the container?
Answers: 1
Chemistry, 22.06.2019 05:50
What happens when the temperature of a solution increases?
Answers: 2
Chemistry, 22.06.2019 10:30
Aglow stick contains a glass vial with chemicals. when the glow stick is bent, the vial breaks and the chemicals react to produce a glow. a science student observes that a glow stick kept in the freezer glows for a longer duration than a glow stick kept at room temperature. what conclusion can be drawn based on the observation? be sure to note the outcome and test variables in the conclusion.
Answers: 1
12. A 100.00-gram sample of naturally occurring boron
contains 19.78 grams of boron-10 (atomic mass...
Mathematics, 15.10.2019 03:30
Mathematics, 15.10.2019 03:30
Computers and Technology, 15.10.2019 03:30
Computers and Technology, 15.10.2019 03:30
History, 15.10.2019 03:30
Chemistry, 15.10.2019 03:30