What would be the effect (increase, decrease, or no change) on the calculated value of R of each of the following experimental errors? Explain each answer. a) The balance used to weigh the magnesium gives a mass that is higher that actual. b) Some H2 escapes into the beaker during the reaction. c) The liquid level in the eudiometer tube is lower than that in the beaker, but this is not taken into consideration in the calculation.