Which substance is a compund a.) li b.) n2 c.) h2 d.) co2atoms of what two elemts are in a every organic compound  a.) calicum and heliumb.) carbon and oxygenc.) cobalt and hydrogen   d.) carbon and hydrogen

Un cierto gas tiene un volumen de 800ml a 80°c y 600ml a 80°c y 600mmhg de presión. ¿cual será el volumen del gas a condiciones normales? sí el gas es oxígeno, ¿cuál será su peso? y ¿cuántas moléculas están presentes en el sistema?

Use the periodic table and your knowledge of isotopes to complete these statements. when polonium-210 emits an alpha particle, the child isotope has an atomic mass of 1-131 undergoes beta-minus decay. the chemical symbol for the new element is fluorine-18 undergoes beta-plus decay. the child isotope has an atomic mass of done intro donne

Which of the following is the best name for a compound made from calcium and bromine? (cabr2) calcium bromide calcium dibromide monocalcium dibromide calcium bromine ii