In these chemical equations, the letters A through D represent different elements. Which equation is balanced? A. AB + C2D → AD + 2CB
B. 2AB + 3C2D → 3CB + A2D3
C. 3A2B + C2D3 → 3AD + C2B3
D. 2AB3 + 3C2D → 6CB + A2D3

Asolution has a ca2+ concentration of 0.049 m and an f- concentration is 0.147 m at equilibrium. the value of ksp for caf2 at 25°c is 4.0 x 10-11. will this solution form a precipitate? yes no

Different isotopes indicate that an element will have different numbers of

Hydrogenation reactions, in which h2 and an "unsaturated" organic compound combine, are used in the food, fuel, and polymer industries. in the simplest case, ethene (c2h4) and h2 form ethane (c2h6). if 140 kj is given off per mole of c2h4 reacting, how much heat (in mj) is released when 12 kg of c2h6 forms?