Which of the following is a problem caused by acid rain? 1 -is a factor in global warming
2-causes depletion of the ozone layer
3-respiratory problems in humans
4-makes lakes and streams unsuitable aquatic life

An atom of which element reacts with an atom of hydrogen to form a bond with the greatest degree of polarity ?

1) which of the following is the best example of a physical change? a) sugar dissolving in tea b) firefly glowing 2) in the combustion of ethane, what is/are the reactants? c2h6 + o2 ==> co2 + h2o a) c2h6 and o2 b) co2 and c2h6

What is the atomic number of an atom that has 6 protons