The law of conservation of mass<span> states that </span>mass<span> in an isolated system is neither created nor destroyed by chemical reactions or physical transformations.
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Two types of stoichiometry are; molar mass and coefficients from balanced equation.
Methane.
Water - H2O
Methane - CH4
Methane has 2 more hydrogens than water.
Answer:
B
Explanation:
the group number is=valence electrons. element 1 is in group 1 element 18 is in group 8. 1<8
Well if the change is reversible then it is a physical change, but if not then it is a chemical change.
