6questions for 100 points
which group of people considered objects in the sky "gods" and crea...
Chemistry, 19.01.2020 08:31 SavgeKid7578
6questions for 100 points
which group of people considered objects in the sky "gods" and created giant towers to record the rising and setting of the sun, moon, and stars?
question 1 options:
christians
mesopotamians
some silly people a long time ago
americans
in 1609, galileo converted a toy into the telescope and discovered four moving stars were actually what?
question 2 options:
actually stars that were in orbit
moons of earth
constellations
moons of jupiter
halley predicted that some comets are in orbit and follow the same path in a cyclical pattern over a period of time.
question 3 options:
true
false
how was einstein's theory proven by scientists?
question 4 options:
they traveled to space
they didn't prove it
they used a trampoline, bowling ball, and marble
they took pictures of an eclipse
what does einstein's theory of general relativity state?
question 5 options:
eclipses are real
the earth is flat
space is relatively general
space has a curve
which scientist figured out that the planets move in the shape of an ellipse?
question 6 options:
galileo
bill nye
kepler
einstein
Answers: 1
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Asample of radium-226 will decay 1/4 of its original amount after 3200years. what is the half-life of radium-226?
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Which is a difference between molecular compounds and ionic compounds? select the correct answer below: question 5 options: molecular compounds typically form between a metal and a nonmetal, while ionic compounds typically form between nonmetals. molecular compounds result from the transfer of electrons between atoms to form ions, while ionic compounds result from the sharing of electrons between neutral atoms. molecular compounds are formed of discrete, neutral molecules, while ionic compounds are formed of large repeating arrays of opposite charges. molecular compounds have high melting points and high boiling points, while ionic
Answers: 3
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How is the atomic number of a nucleus changed by alpha decay
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Given the following at 25c calculate delta hf for hcn (g) at 25c. 2nh3 (g) +3o2 (g) + 2ch4 (g) > 2hcn (g) + 6h2o (g) delta h rxn= -870.8 kj. delta hf=-80.3 kj/mol for nh3 (g), -74.6 kj/mol for ch4, and -241.8 kj/mol for h2o (g)
Answers: 1
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