Two students in a chemistry lab start a particular lab with 1.23 g of aluminum. They react it with excess sulfuric acid to produce aluminum sulfate. If they produce 3.00 g of aluminum sulfate what is their percent yield

If a 12-v battery is connected to a circuit that has a current of 3.0 a, what is the total resistance in the circuit? 36 ohms 4 ohms 0.25 ohms

The famous scientist galileo galilei did several experiments with sloping planes, which he rolled metal balls down so that he could study motion. by changing the slope, he could study how the speed at which the ball rolled was affected. what was the independent variable in galileo's experiment? a. the speed of the ball b. the slope of the plane c. whether the ball moved d. what the ball was made of

Δu of , in kj/kg, as it isto k, (a)as a of , (b) at , (c) at .