Pause Like all of the planets in the solar system, Earth orbits
around the Sun. The picture shows the Earth's orbit.
144
10
Which factor controls the motion of a planet's orbit in
the solar system?
O A. the gravitational pull of the Sun
15
6%
O B. the speed of the planet's rotation
OC. the revolution of the planet on an axis
en 2
164
79
O D. the amount of gases in the planet's atmosphere

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explanation:

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answer:

technetium is the most reactive. this is followed by silver. the least reactive out of these three elements is strontium.

a. the law of proportion states the combination of 2 atoms in a specific ratio to produce multiple compounds such as the given statement of question ‘1st compound contains 88.8 % cu ’ indicates 88.8 g of cu is present along with 11.2 g oxygen in 100 g of compound whereas the statement ‘2st compound contains 79.9 % cu ’ indicates 79.9 g of cu is present along with 20.1 g oxygen in 100 g of compound

1st compound contains 88.8 g cu

for cu

m = 63 g /mol

atomic % = 88.8 /63 = 1.42

for o

m = 16 g /mol

atomic % = 11.2 /16 = 0.7

b. the emperical formula of 1st compound is

cu1.4o0.7

cu2o