1. Does the law of conservation of mass apply to the burning of wood?
O
A. Yes, because the energy produced is also considered while balancing
mass.
B. Yes, because the mass of all the products of burning is equal to the mass
of the reactants (wood and oxygen gas).
C. No, because the mass of the ashes is less than that of the original wood.
D. No, because the energy that is created while burning results in a loss of
mass.

B. Yes, because the mass of all the products of burning is equal to the mass

of the reactants (wood and oxygen gas).

Explanation:

good luck

the ideal gas law equation is as follows

pv = nrt

where p - pressure

v - volume

n - number of moles

r - universal gas constant

t - temperature

so if the pressure, volume and temperature are already known

we are left with n and r

since r is the universal gas constant that has a known fixed value then r too is known

so we are left with 'n'

once we know temperature volume and pressure

we can find the number of moles of gas present using the ideal gas law equation

this is not my own answer, this is an answer for the same question by the user blahblahmali. i do not claim ownership of this account.

answers: to make sure that all of the broken pieces of tablet were added to the water, to allow for fair comparison of all three trials, with different particle sizes to avoid experimental error