I Would think it would be C Since Humans can't live 500 years but then yet again it is light years not regular years i think if you find how man years is 500 light years the that could help you in finding the answer
Answer:
3
Explanation:
C3H8. + 5O2. ::: 3CO2. + 4H2O
139.850 there ya go hope u ace it
The most common isotope of hydrogen is H¹ and this isotope has 0 neutrons
Answer:
memory cells
Explanation:
The unscrambled words are white blood cells, memory cells, and antibodies. Memory cells is the correct answer, so that's what you'd write.
