an experiment is performed to measure the mass percent of caco3(s) in eggshells. five different samples of caco3(s) of known mass react with an excess of 2.0mhcl(aq) in identical sealed, rigid reaction vessels. the pressure of the gas produced is measured with a pressure gauge attached to the reaction vessel. since the reaction is exothermic, the reaction system is cooled to its original temperature before the pressure is recorded. the experimental data are used to create the calibration line below.

To the north of ginnungagap it was bitterly cold. (20) nothing was there but fields of snow and mountains made of ice. to the south of ginnungagap was a region where frost and snow were never seen. it was always bright, and was the home of light and heat. the sunshine from the south melted the ice mountains of the north so that they toppled over and fell into ginnungagap. there may be a mistake in the way the sentence is written. if you find a mistake, choose the answer that corrects the mistake. if there is no mistake, choose ‘correct as is.' a) correct as is. b) nothing was there but snow fields and mountains of ice. c) nothing was there but fields of snow and icey mountains. d) nothing was there but fields of snow and mountains of ice.