The complete combustion of methane can be seen in the equation: CH4 + 2O2 → CO2 + 2H2O

If 50 g of methane are reacted completely, which statement describes the reaction? Choose the correct answer.

The total mass of reactants is 50 g.

The total mass of reactants is greater than 50 g.

The total mass of products is 50 g.

The total mass of products is less than 50 g.

PLEASE

Calculate the expected ph values of the buffer systems from the experiments (a,b,c,d), using the henderson- hasselbalch equation, ph-pka+log[a-]/[ha]. use for pka values carbonic acid= 6.37, and acetic acid= 4.75.

In which reaction is precipitation occurring?

The characteristics of two different types of reactions are shown below: reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of an element. which statement is true about the atoms of the elements that participate in the two reactions? their identity changes in both reaction a and reaction b. their identity changes in reaction a but not in reaction b. their identity changes in reaction b but not in reaction a. their identity remains the same in both reaction a and reaction b.