The numbers represent the change in energy for a chemical reaction. They are calculated by subtracting the energy of products from the energy of reactants. Which number would result from an endothermic reaction?

Fill in the coefficients that will balance the following reaction: a0cr2(so4)3 + a1agno3

The chart shows the bid provided by four contractors to complete a job. which contractor is the most cost-effective?

Precision can be defined as the o exact center of a data set. o reproducibility of a measured value. o correlation between two variables that are measured in a data set agreement between a measured value and an accepted value.