mamta

an experiment to test the effect of zinc tablets on plant growth

CaCO3 + H2 SO4 ------> CaSO4 + CO2 + H2 O 200 g of calcium carbonate are added to 4 L of water. a. What is the molarity of the calcium carbonate solution? b. How many moles of hydrogen sulfate would be needed to react with a 25 mL sample of the calcium ca...

H2 S + HNO3 --------> NO + H2 O + S 150 g of hydrogen sulfide are dissolved in 3500 mL of water. a. What is the molarity of the hydrogen sulfide solution? b. How many grams of sulfur can be produced from 50 mL of this solution? c. 22.4 L of nitrogen monox...

20 children go for a picnic in a bus. They are to sit 2 or 3 to a seat. There are 7 seats. How many seats will have 3 children seated on them?

If one is added to both numenator ans denominator fraction become 3/4 however 3 is subtracted from both the fraction become 1/2.fnd the fraction.

NaHCO3 + HCl ----> NaCl + CO2 + H2 O 150 g of sodium bicarbonate are added to 2 L of water. a. What is the molarity of the sodium bicarbonate solution? b. How many moles of hydrogen chloride would be needed to react with a 35 mL sample of the sodium bicar...