NAME Answer all five questions. Please follow the rules for significant figures.
ID: 552026 • Letter: N
Question
NAME Answer all five questions. Please follow the rules for significant figures. Show all calculations Conversion factor for SI units not provided. Value of . 3.14 1.) A star is estimated to have a mass of 3.50 10kg. Assuming it to be a sphere of average radius 7.50x 10' km, calculate the average density of the star in units of grams per cubie centimeter. 1.5 points) 2.) Refer to Exsperiment 2: "Introduction to gravimctric analysis" and specify whether the calculated mass percent of water would be too high, too low, or unchanged as a result of each of the following (1.5 points) experimental condition. Justify your answers. a) The heating was insufficient to remove all of the water from hydrated salt b) Some of the sample spattered out of the crucible onto the laboratory bench during the heating. TO P2Explanation / Answer
1) to find the volume of star formula V = (4/3)()(r^3)
volume of star = (4/3)()(7.50*10^5)^3
= 5.625 *10^17
converting to cubic centimeter
V = 5.625 * 10^32 cm^3
we divide mass by its volume
density of star = (3.50*10^36 kg) / (5.625*10^32 cm^3)
= 6222.22 kg / cm^3
converting to g/cm^3
6.2*10^6 g / cm^3
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