If the.pressure exerted by a gas at [math]25^{\circ} \mathrm{C}[/math] in a volume of 0.044 L is 3.81 atm, how many moles of gas are present
To get a result with the best degree of precision, the
number of significant figures should be equal to the smallest number of
significant figures of the given numbers. In this case, the smallest is 3 as
given by the number 9.03 mL.
Therefore density is:
<span>11.50 g / 9.03 mL = 1.27 g/mL</span>
Well its something that is physically happening you could watch it happen and it doesnt require other chemicals for a chemical change.
To get the number of dozens, we will first calculate the number of particles in 2.45 grams and the divide the number of particles by 12 (as one dozen contains 12 particles).
We know that one particle has a mass of 2.51 x 10^-4 grams and we want to know the number of particles in 2.45 grams. We can simply use cross multiplication to calculate this as follows:
number of particle = (2.45 x 1) / (2.51 x 10^-4) = 9760.95 particles which will be considered as 9760 particles only (we count whole particles)
number of dozens = 9760 / 12 = 813 dozens
