A substance A decomposes in a first order reaction. The half-life for this reaction is 48 s. In an experiment, the initial amount of A is 1.00 mol. The amount, in moles, of A remaining at 144 s is A 0.500 B 0.333 C 0.250 D 0.125

2pos suppose an object in free fall is dropped from a building. its starting velocity is 0 m/s. ignoring the effects of air resistance, what is the speed (in m/s) of the object after falling 3 seconds? give your answer as a positive decimal without units. answer here

If the concentration of phosphate in the cytosol is 2.0 mm and the concentration of phosphate in the surrounding fluid is 0.1 mm, how could the cell increase the concentration of phosphate in the cytosol? a) passive transportb) diffusionc) active transportd) osmosise) facilitated diffusion

What is the work done by the electric force to move a 1 c charge from a to b?