What is needed in order to determine a mole ratio?

1) which of the following is the best example of a physical change? a) sugar dissolving in tea b) firefly glowing 2) in the combustion of ethane, what is/are the reactants? c2h6 + o2 ==> co2 + h2o a) c2h6 and o2 b) co2 and c2h6

How is the shape of the poem “peer” connected to its meaning?

Which of the following substances is the most soluble in water? a. sodium chloride b. methane c. bromine d. carbon