The triple-beam balance is a first-class lever; the fulcrum is between the two weights. As the liquid in the Petri dish evaporates, which way do you think that the balance pointer will move? o up
o down
o no movement

The table lists pressure and volume values for a particular gas. which is the best estimate for the value of v at p = 7.0 × 103 pascals?

What reaction is taking place? 02 + c3h8 = h20 + co2

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?