The Sun<span> is a main-sequence star, and thus generates its energy by </span>nuclear fusion<span> of hydrogen nuclei into helium. In its core, the </span>Sun<span> fuses 620 million metric tons of hydrogen each second.</span>
A calorimeter experiment is a set-up that provides insulation so that no heat escapes to the surroundings and all energy can be accounted for. It can be done at either constant volume or constant pressure. So, the answer to this is knowing the mass of water, the specific heat which is an empirical data, and the change in temperature which can be measured using a thermometer. This experiment could measure the mass of an unknown substance added or the specific heat of the substance or the calorimeter. <em>The answer is D.</em>
We need to get the mole ratio between the elements. To do this, we will divide by the the smallest number of moles given as follows:
0.5 mole of Na / 0.5 = 1
0.5 mole of S / 0.5 = 1
0.75 mole of O / 0.5 = 3/2
Now, we need to get rid of the fractions. To do this, we will multiply all the ratios by 2:
Na = 1 x 2 = 2
S = 1 x 2 = 2
O = 3/2 x 2 = 3
So, in the simplest formula, the ratio Na:S:O is 2:2:3
This can be written as: Na2S2O3 which is known as sodium thiosulphate.
P=m/V
m=40.24 g
V=50.0 mL=50.0 cm³
p=40.24/50.0=0.8048 g/cm³
