If 0.025 gram of pb(no3)2 is dissolved in 100. grams of h2o, what is the concentration of the resulting solution, in parts per million?
(1) 2.5 × 10–4 ppm (3) 250 ppm
(2) 2.5 ppm (4) 4.0 × 103 ppm

Look at the reaction below: ca(hco3)2 --> caco3 + co2 + h2o first, balance the reaction. once balanced, use dimensional analysis or another method to find out how many moles of carbon dioxide will be produced if we start with 16.5 moles of calcium bicarbonate (calcium hydrogen carbonate). = mol of co2 number needs to be reported to three significant figures.

Which best describes how johannes kepler developed his laws of planetary motion

What is the ima of the 1 st class lever in the graphic given? 2 3 0.5