Answer:
A
Explanation:
BECAUSE LOOK AT THE PEDIGREE. IT SHOWS U
We can say they're the ISOTOPES of an element.
Isotopes of an element means the atoms of the same element has the same number of protons but different number of neutrons. They're still the same element because their number of proton is the same, which is like an ID card number, each element has a specific number of protons.
Each element has different amount of Isotopes. Some may have a lot, probably up to twenty, and some only have one stable isotope. For example, in hydrogen, there's the hydrogen atom with 0 neutrons, 1 neutron and 2 neutrons. They're the Isotopes of hydrogen.
Different isotopes of an element has a different atomic mass, as the number of neutron is different. Additionally, they also have different abundance in the environment. Maybe certain Isotopes can be found more in the earth.
38*10^(-4)=0.0038
This means you move the decimal to the left (divided by 10) four times.
4.0*10^(-2)=0.04
This means you move the decimal to the left two times. Now add the two.
0.0038+0.04
Always line up decimals when adding them!
The final answer is 0.0438
If i am not mistaken , the answer is C
Answer:
C. How much greenhouse gas does your fuel produce compared with current fuel sources?
Explanation:
Answer A asks whether vehicles need to be changed to use the fuel.
Answer B asks whether the vehicles will get better mileage.
Answer C asks whether emissions will be better or worse than current emissions.
Answer D asks whether it will be more expensive than current fuel.
Hope this helps!