Chemistry, 03.03.2021 21:30 tjahaheuuwu
A hydrogen atom has a diameter of 5.3 x 10^-11 m. Express this diameter in nanometers and picometers (pico = 10^-12)
Answers: 2
Chemistry, 22.06.2019 11:40, Wemaybewrong
Modern pennies are composed of zinc coated with copper. a student determines the mass of a penny to be 2.482 g and then makes several scratches in the copper coaling (to expose the underlying zinc). the student puts the scratched penny in hydrochloric acid, where the following reaction occurs between the zinc and the hcl (the copper remains undissolved): zn(s) + 2 hcl(aq) → h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 °c. the collected gas occupies a volume of 0.899 l at a total pressure of 79 j mmhg. calculate the percent zinc (by mass) in the penny. (assume that all the zn in the penny dissolves.)
Answers: 1
Chemistry, 22.06.2019 23:00, jolainjoseph01998
What element has similar physical and chemical properties as boron.
Answers: 1
Chemistry, 23.06.2019 04:50, mia36492
The diagin dilutepage 6 of 12a6a5(a)fluorine, chlorine, bromine and iodine are placed in the same group of theperiodic table. state the common name used to describe elements in this group.(i)state the group in which the elements are placed and explain whythey are placed in that group.(ii)which of the above named elements is a solid at roomtemperature and pressure?
Answers: 2
Chemistry, 23.06.2019 07:00, jennnifercrd59jc
Choose the correct statement about licensed veterinarians in the united states. a. they must be certified by the avma. b. they can treat all nonhuman animals. c. they can can treat only animals specified on the license. d. they must choose a specialty.
Answers: 2
A hydrogen atom has a diameter of 5.3 x 10^-11 m. Express this diameter in nanometers and picometers...
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