Your grandfather is a farmer. you hear him complain about how his crops are not doing well. you know that we have the same amount of rainfall as last year. what might he need to do to improve the crops next year? explain & draw a picture.

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.

According to coulomb's law, how would the electrical force between particles change if the product of their electrical charge increased?

Chen drew a diagram to compare the ways in which different organisms obtain nitrogen. which label belongs to the area marked z?