Which pollution effects the environment the most? A. air pollution
B. water pollution
C. land pollution (ex. throwing trash in nature)
D. Noise pollution ​

Given sno2 + 2h2 - sn + 2h20 tin oxide reacts with hydrogen to produce tin and water. how many moles of sno2 are needed to produce 500.0 grams of sn?

Can someone me with 6 to 10 plz this is for masteries test.

If 15 drops of ethanol from a medical dropper weight 0.60g, how many drops does it takes from a dropper to dispense 1.0ml of ethanol? the density of ethanol is 0.80g/ml