General Chemistry Answers

Hydrogen for use in production of ammonia is shown in the reaction,Hydrogen for use in production of ammonia is shown in the reaction:H2O (g) is removed? 

What is the insulator between the contacts of a bell push switch when it is off?

Ten milliliters of phenolphthalein was transferred in a burette. What is the measured volume of the substances in the burette if its computed percentage error is 0.82%?

A sample of magnesium is heated and the mass of magnesium oxide produced found to be 80g. Calculate the mass of decomposed magnesium carbonate if the yield of the reaction is 80%.

In which mixture is NaOH the limiting reagent?

A. 0.20mol NaOH + 0.10mol H₂SO₄

B. 0.10mol NaOH + 0.10mol H₂SO₄

C. 0.20mol NaOH + 0.10mol HNO₃

D. 0.10mol NaOH + 0.10mol HNO₃

1.0 dm3 of an ideal gas at 100 kPa and 25 °C is heated to 50 °C at constant pressure. What is the new volume in dm3?

What is the pH value of a solution of potassium hydroxide whose concentration of hydroxide ions is 0.001 mol dm^-3 ?