5. Imagine that you have been given an unknown substance and you want to find its density. You measure its mass as 78,8 g and its volume as 8 cm? What is the density of the substance?
A.0.102 g/cm
B. 0.98 g/cm
C. 9.85 g/cm
D. 630.4 g/cm

Ase your answer to this question on the information below. hydrocarbons and fissionable nuclei are among the sources used for the production of energy in the united states. a chemical reaction produces much less energy than a nuclear reaction per mole of reactant. the balanced chemical equation below represents the reaction of one molecule of a hydrocarbon with two molecules of oxygen. chemical equation: ch4 + 2o2 → co2 + 2h2o + 1.48 × 10−18 jthe nuclear equation below represents one of the many possible reactions for one fissionable nucleus. in this equation, x represents a missing product. nuclear equation: write an isotopic notation for the missing product represented by x in the nuclear equation.

What is a possible quantum number set for an electron in the 3s orbital of a magnesium atom

Ineed this asap part i: scientific method what is the difference between science and pseudoscience? what is the scientific method?