Acolumn is filled with four different liquids of different densities. a red liquid, a blue liquid, a green liquid, and a purple liquid are all added into the column. this chart shows the densities of the liquids. in what order would the liquids would arrange themselves, from top to bottom? blue, red, purple, green. purple, green, red, blue. purple, green, blue, red. blue, red, green, purple.

Acompound has a molar mass of 92.02 grams/mole, and its percent composition is 30.4% nitrogen (n) and 69.6% oxygen (o). what is its molecular formula? a. n2o4 b. no2 c. n2o d. n4o2

For a research project, a student decided to test the effect of the lead(ii) ion (pb2+) on the ability of salmon eggs to hatch. this ion was obtainable from the water‐soluble salt, lead(ii) nitrate, which the student decided to make by the following reaction. pbo(s) + 2 hno3(aq) → pb(no3)2(aq) + h2o losses of product for various reasons were expected, and a yield of 86.0% was expected. in order to have 5.00 g of product at this yield, how many grams of pbo should be reacted? (assume that sufficient nitric acid, hno3, would be used.)

I’m an electrically neutral atomic any element, there are equal numbers of