Question

4. Atoms of the most reactive elements tend to have: (1 point)
One or Seven valence electrons
Eight valence electrons
Four or Five valence electrons
No valence electrons

Answer 1

PLEASE HELP! i give medals

Answer 2

One or Seven Electrons, definitely.

Answer 3

thanks

Answer 4

could you help me out with more?

Answer 5

Maybe/

Answer 6

ok 16. Use the H-R diagram again to answer this question: Most known stars fall into the Main
Sequence band. If a star with a luminosity value of 1 was a Main Sequence star, which of the following
could be its temperature? (1 point)
50,000 K
30,000 K
6,000 K
1,000 K

Answer 7

...Really. The Temperature scale only goes from 3000 K to 25000 K. Which one do you think it is? Don't be lazy.

Answer 8

ok ya ik that was a easy one i just really need help on sum i think this one is 30,000

Answer 9

18. A car with a mass of 1200 kg is traveling 5 m/s. Calculate the car’s kinetic energy. Show your work
and include the proper unit with your answer. (2 points) how about this one

Answer 10

Try again.
\[K = \frac{1}{2}mv^2\]

Answer 11

Where K, kinetic energy, is in Joules.

Answer 12

so what would be mv^2

Answer 13

oh ut talking about the other problem arent u ?

Answer 14

3000kg

Answer 15

No...The mass is 1200kg, the velocity is 25 m/s. What's the kinetic energy?

Answer 16

15000kg

Answer 17

oh i forgot too multiply 5 by it self

Answer 18

The units aren't kilograms, they're Joules...

Answer 19

oh....ya sorry slow!! i have alot on my plate but thank you for having patience with me!

Answer 20

7. Which of the following statements is true about what happens during a chemical reaction?
(1 point)
Bonds of the reactants are broken, and bonds of the products are formed.
Bonds of the reactants are formed, and bonds of the products are broken.
The bonds of both the reactants and the products are broken.
The bonds of both the reactants and the products are formed.

Answer 21

I'm going with A, pretty sure.

Answer 22

thanks sorry i have a interview but ill finish my test later thanks again!

Answer 23

Ok.

Answer 24

8. A log is burning in a fireplace. If the amount of oxygen reaching the log is decreased, which of the
following statements is true? (1 point)
The reaction rate increases.
The reaction rate decreases.
The reaction rate remains the same.
The reaction rate only depends on the temperature.
9. Carbon-14 has a half-life of 5,730 years. If the age of an object older than 50,000 years cannot
be determined by radiocarbon dating, then: (1 point)
Carbon-14 levels in a sample are undetectable after approximately 11 half-lives.
Carbon-14 levels in a sample are undetectable after approximately 9 half-lives.
The half-life of Carbon-14 is too long to accurately date the object.
A radioisotope with a shorter half-life should be used.

Answer 25

@ipwnbunnies help please