If the soil at a construction site contained lead at a concentration of 5.0 ppm, what mass lead would be present in a 500-g sample of this soil

After cloud droplets form, what must happen to them for precipitation to occur?

When 225mg of anthracene, c14h10(s), was burned in a bomb calorimeter the temperature rose by 1.75k. calculate the calorimeter constant. by how much will the temperature rise when 125mg of phenol, c6h5oh(s), is burned in the calorimeter under the same conditions? (δch< (c14h10,s)=–7061 kj mol−1.)

What is the overall order of reaction for rate = k[no]2[o2]