Answer:
B
Explanation:
A chemical change occurred, and this caused the liquid’s physical properties to change.
when we read her experiment we can see that color changed to blue, it is because new products are formed. And the temperature cause this.
Answer:
i am new but I haven't reached this level yet
The southern pacific ocean has a similar symmetric pattern to the seafloor ages of the Atlantic ocean. In the Pacific, the seafloor on one side of the youngest crust gets very old but the seafloor on the other side is much younger.
The reason nonmetals are electrical insulator is since
valence shells in nonmetal atoms are almost full, the atoms attract electrons
and hold them tightly to fill their valence. The reason why it acts as an
insulator is the high ionization energy it has. It prevents any electron from
leaving an atom easily even when an electric field is applied.
When a half-life passes, only half of the mass of the sample stays. So to get to 25 g from 200, let's see how much half-lives will pass.
200÷2=100
100÷2=50
50÷2=25
The answer to that is 3 half-lives, or
3 × 5730 = 17190 years
