How many phosphorus atoms are contained in 158 kg of phosphorus? 3.07 x 1027 phosphorus atoms 2.95 x 1027 phosphorus atoms 3.25 x 1028 phosphorus atoms 1.18 x 1024 phosphorus atoms 8.47 x 1024 phosphorus atoms

a sample of male testosterone C19H28O2 contains 3.88*10^21 hydrogen atoms. How many atoms of carbon does it contain? How many molecules of testosterone does it contain? How many moles of testosterone does it contain? What is the mass of the sample in grams?

The stable isotopes of iron are $4Fe, Fe, $7Fe, and 5"Fe. The mass spectrum of iron looks like the following: 100 91.75 80 60 40 20 5.85 2.12 0.28 54 56 57 58 Mass number Use the data on the mass spectrum to estimate the average atomic mass of iron. Relative number of atoms

How many atoms (total) are present in a 3.45 x10-2 m3 sample of Al2O3, which has a density of 3.95 g/cm3?

3.97 x 10^24 molecules of NO has what mass

White sand is made of silica (silicon dioxide, or SiO2), which has a density of 2.20 g/cm3. How many silicon atoms are in a spherical grain of sand 0.385 mm in diameter?

On another planet, the isotopes of titanium have the given natural abundances. Abundance Mass (u) 74.200% 45.95263 15.100% 47.94795 10.700% 49.94479 Isotope 46 Ti 48 Ti 50 Ti What is the average atomic mass of titanium on that planet? average atomic mass= x10 TOOLS u

How many atoms of lithium are in 18.7 g? O none of the above O 2.70 x 1024 O 3.11 x 1024 O 2.14 x 1024 O 1.62 x 1024

Calculate the number of grams of lead contain 1.2 x 1024 atoms of lead.

Certain antacids are composed of calcium carbonate, CaCO3. How many grams of calcium are present in a 400 g bottle of CaCO3 ? 235 g 160 g 0.160 g 9.99 g