Home / Questions / The limiting reactant in a chemical reaction is always the reactant which is present in th...
The limiting reactant in a chemical reaction is always the reactant which is present in the least amount in terms of mass.
112. When calculating the percent yield of a reaction, the only information necessary is the mass of the starting materials.
113. A calorie used by nutritionists is equal to 1000 cal or 1 kcal used by chemists.
114. One calorie is the amount of heat energy required to raise the temperature of 10.0 g of water by 1oC.
115. When a substance cools from a high temperature to a low temperature, its heat change will have a negative sign.
116. The heat capacity of a substance is the amount of heat energy that is needed to cause the substance to melt.
117. In a bomb calorimeter, the bomb itself, the water surrounding it, and the thermometer would be considered part of the “system.”
118. When fats or other foods are burned in a bomb calorimeter, the system absorbs heat, so the reaction is endothermic.
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