The mass of a proton is about 1.007276 . Convert this number into grams and picograms. The radius of a proton is about 1 fm. Calculate the density of the proton in g/cm3.

Using your measured density (8.81g/cm3), and the knowledge that %Zn + %Sn = 5.00%, calculate the %Sn in these pennies. copper= 95% ,density = 8.96zinc = 5%, density = 7.13tin = density 7.31

CHEMISTRY Calculating Density Density is the compactness of matter. Density describes the quantity of matter (mass) per unit of volume (3-dimensional space). Density is calculated as the mass of the matter divided by volume. The symbol for density is Greek letter rho (p). The units for mass are in grams (g) and the units for volume is cubic centimeter (cm³). It should be noted that 1 cm³ is equal to 1 ml of volume. 1 cm³= 1 ml. The units for density are g/cm³. Part 1 Determine the density of the new liquid materials created in the Secret Density Research Laboratory. Type the value (no units) of the density into the boxes in the density column. Report density to the 2nd number after the decimal. Use a zero to the lef of the decimal for values less than 1.00. Examples: 2.35, 0.75, 1.90 Material name Harrisonite Waltonium Kellese Wheelernone Osborneum Popebrillium Mass (g) 430 590 260 m P=V 620 380 510 Volume (cm³) 537 454 236 364 633 340 Density (g/cm³) SAMSUNG

Consider a sample containing 8.398x10-18 grams of Fe3O4. How many oxygen atoms are in the sample? Express your answer using at least three significant digits. Do NOT use scientific notation to express your answer.