Adistributor of ball bearings sells packages of "remnant" ball bearings that contain a mixture of copper bearings and titanium bearingsâalong with bearings made of a proprietary alloy of several different metals. although the bearings all have the same diameter, 4.175 mm, the metals from which they are made all have different densities. the density of the proprietary alloy is 5.659 g/cm^3.packages of the remnant bearings are, on average, 30.4 percent copper bearings and 51.2 percent titanium bearings, the remainder being proprietary alloy. using the formula for the volume of a sphere, v = 4/5ïr^3, and the densities of the metals. determine the average mass of a ball bearing in one of the packages.

Nanotechnology, the field of trying to build ultrasmall structures one atom at a time, has progressed in recent years. one potential application of nanotechnology is the construction of artificial cells. the simplest cells would probably mimic red blood cells, the body's oxygen transporters. for example, nanocontainers, perhaps constructed of carbon, could be pumped full of oxygen and injected into a person's bloodstream. if the person needed additional oxygen-due to a heart attack perhaps, or for the purpose of space travel-these containers could slowly release oxygen into the blood, allowing tissues that would otherwise die to remain alive. suppose that the nanocontainers were cubic and had an edge length of 24 nanometers. part a part complete what is the volume of one nanocontainer? (ignore the thickness of the nanocontainer's wall.) express your answer using two significant figures. v v = 1.4ă—10â’20 l previous answers correct significant figures feedback: your answer 1.3824â‹…10â’20 = 1.382ă—10â’20 l was either rounded differently or used a different number of significant figures than required for this part. if you need this result for any later calculation in this item, keep all the digits and round as the final step before submitting your answer. part b suppose that each nanocontainer could contain pure oxygen pressurized to a density of 81 g/l . how many grams of oxygen could be contained by each nanocontainer?

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Which element has the lowest electronegativity? calcium(ca) gallium(ga) selenium(se) bromine(br)