Arock is weighing 15.0 grams is placed in a graduated cylinder, displacing the volume from 25.0 ml to 36.2 ml what is the density of the rock in gram/cubic centimeter ?

Read the chemical equation. 2c2h2 + 5o2 → 4co2 + 2h2o which of the following statements would be correct if one mole of c2h2 was used in this reaction? one mole of oxygen was used in this reaction. five moles of oxygen were used in this reaction. four moles of carbon dioxide were produced from this reaction. two moles of carbon dioxide were produced from this reaction.

Arectangle has a diagonal 20 inches long that forms angles of 60 and 30 with the sides. find the perimeter of the rectangle. for geometry

Which compound should undergo substitution of the bromine by phenolate anion? draw the structure of the organic product?