Answer:
CH4 + 2 O2 → CO2 + 2 H2O
Explanation:
There are one mole of O2 on the left side and on the right side there are three moles of O2. And to fix it you would need to make it two moles of O2 to have four molecules of O2 on the left side. Then you would make two moles of H2O to have a total of four moles of O2 on the right. Therefore, CH4 + 2 O2 → CO2 + 2 H2O is the answer.
Answer:
D. atomic mass unit
Explanation:
A unified atomic mass unit is used for measuring atomic mass.
Balanced equation is
2NaOH + H2SO4 ---> Na2SO4 + 2H2O
(the last compound is H2O NOT H2)
Not sure about the ionic equation
Answer:
Plasma
Explanation:
Estimated to be 99.999% of the visible universe, cosmic plasma may be considered to be the first state of matter, that preceded the other states of matter in the history of the evolution of the Universe.