A plastic 100-L flexible bottle has an initial volume of 62.13 L contains 12.51
mol of gas. More gas is then added to the container until it reaches a final
volume of 83.5 L. Assuming the pressure and temperature of the gas
remain constant, calculate the number of moles of gas added to the
container. *

1. calculate the approximate enthalpy of the reaction in joules. estimate that 1.0 ml of vinegar has the same thermal mass as 1.0 ml of water. iqnore the thermal mass of th sodium bicarbonate. note: it takes about 4.2 joules () to change 1.0 gram (1.0ml) of water 1.0 c

Avariable that is not being directly tested during an experiment should be

Pegmatites are igneous rocks in which the individual minerals are very large. typically, the minerals are all light-colored quartz, feldspar and muscovite. if you were given a black and white photograph of a pegmatite in a quarry (where the rock has been blasted and broken), what physical properties could you use to identify those three minerals in this hypothetical photo? describe each mineral and the specific diagnostic properties. be specific.