20 answer with an explanation.
when 4.0 l of he (g), 8.0 l of n2 (g), and 2.0 l of ar (g) all at 0°c and 1.0 atm, are pumped into an evacuated 8.0 l rigid container, the final pressure in the container at 0c is?
a. 0.5 atm
b. 1.0 atm
c. 2.5 atm
d. 4.0 atm
e. 3.5 atm

under a microscope, cancer cells may look very different from normal cells. they often have different sizes and some may be larger than normal while others are smaller. cancer cells are often abnormally shaped and the control centre of the cell (the nucleus) may have an abnormal appearance.

i think? ?

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

o conteúdo de calor de um sistema é igual à entalpia apenas para um sistema que é constante