How does a new hypothesis replace an order exclamation of something in the natural world

Sometimes when extraction a polar organic solute into anorganic solvent, brine (a saturated solution of sodium chloride) isused in place of water. What is the advantage of using brinerather than water?

The EA₂ of an oxygen atom is positive, even though its EA₁ is negative. Why does this change of sign occur? Which other elements exhibit a positive EA₂? Explain.

Atoms which have lost one electron from their outer shell are called what

Find the change in volume of the metal tank, δvt, and that of the ethanol in it, δve.

How many moles of CaO will be produced from 23.9 g of Ca? 2Ca (s) + O2 (g) - 20:0 (3) mol

14. Two or more substances that are together but do not combine to form a new, pure substance.

A solution of a compound with a known extinction coefficient of 23,100 M-1cm-1 has an absorbance of 0.735 in a 1.30cm path length, what is the concentration of the solution

Balance the following equation with the smallest whole number coefficients. Choose the answer that is the sum of the coefficients in the balanced equation. Do not forget coefficients of "one". RbOH + H3PO4 → Rb3PO4 + H2O

What is the temperature of 100 liter container having 1 mole of an ideal gas at a pressure of 20 kilopascals

5.2*10^26 molecules of ch4 in volume