Achemical equation must always be balanced because matter?

a- keeps its original properties
b-it’s never lost or gained
c-cannot change to a different kind of matter
d-is either exothermic or endothermic

answer:

b- it’s never lost or gained

explanation:

atoms never appear or disappear during chemical reactions.

answer:

a

explanation:

a- keeps its original properties

water at room temperature is flowing through a pipe with pressure taps located 10 ft apart along one section of the pipe, which are connected to a mercury (s=13.6) manometer.

a gas, having a molecular weight of 13 kg/kmol and a kinematic viscosity of 0.25 cm2/s, flows through a pipe 0.25 m internal diameter and 5 km long at the rate of 0.4 m3/s and is delivered at atmospheric pressure.