Chemistry, 13.12.2019 02:31 Xavierayala2003
Using the following thermochemical data, what is the change in enthalpy for the following reaction?
a.
120.9 kj
b.
-251.1 kj
c.
251.1 kj
d.
-120.9 kj
Answers: 3
Chemistry, 21.06.2019 21:00
The earth's moon is unusually large. two popular theories of the moon's origin include the "sister world" hypothesis, which states that the moon formed from the same materials as the earth, near enough to the earth that they fell into orbit around each other. a second theory is the "capture" hypothesis, in which the moon formed elsewhere in the solar system, and the earth's gravity pulled it into its orbit. studies of what the moon is made of indicate that some of its materials had to come from the earth or from the same area of the solar system where the earth had formed. at the same time, the moon does not contain much of the material that makes up the earth's core, so the moon could not have formed from the same materials as the earth. how do the two facts above affect the described theories of the moon's origin? a. they show that scientists will never agree on where the moon came from. b. they show that more experiments on moon formation need to be done. c. they show that no theory accounts for the existence of the moon. d. they show that neither theory is complete and entirely correct.
Answers: 1
Chemistry, 23.06.2019 07:00
The image compares the arrangement of electrons in two different neutral atoms. a figure labeled atom q has a shaded sphere at the center of three concentric circles. the innermost circle has two black spheres. the middle circle has six black spheres. to the left of this figure is another figure labeled atom p. atom p has a shaded sphere at the center of three concentric circles. the innermost circle has two black spheres. the middle circle has seven black spheres. which of the following best explains the position of the two atoms in the periodic table?
Answers: 2
Chemistry, 23.06.2019 09:10
Complete the following radioactive decay problem. tan+on-? c+th
Answers: 1
Chemistry, 23.06.2019 12:30
0.070g of hydride of carbon occupies 56cm^3 at s.t.p when vaporized and contained 14.29% by mass of hydrogen.what is the formula for the hydrocarbon
Answers: 1
Using the following thermochemical data, what is the change in enthalpy for the following reaction?...
Social Studies, 07.01.2021 18:00
Computers and Technology, 07.01.2021 18:00
Physics, 07.01.2021 18:00
English, 07.01.2021 18:00
Social Studies, 07.01.2021 18:00
Mathematics, 07.01.2021 18:00
Arts, 07.01.2021 18:00
Mathematics, 07.01.2021 18:00