What is the coefficient in a chemical equation

A student is running an experiment in which 74.8 grams of bai2 is needed, but the only jar of reagent in the lab is labelled barium iodide dihydrate.

You leave a piece of bread outside for a few days. It forms green and blue mold. It smells awful. A chemical change has occurred - True or False? Explain with facts

The principle of conservationof mass states that in achemical reaction, the totalmass of the reactants is

Based on the balanced equation, the molar ratio of CuCl2 to Al should be

90.0 g of Ca (NO3) 2 was used to create a 2.6 M solution. What is the volume of the solution? (Ca (NO3) 2 = 164.0878 g/mol)

Name two ways that living things use proteins

Solid lithium metal and diatomic fluorine gas react spontaneously to form a solid product. give the balanced chemical equation (including phases) that describes this reaction.

What is the best way to transform a chemical potential energy into internal kinetic energy?

A reaction starts with 20.0 grams of lithium hydroxide (LiOH) and produces 31.0 grams of lithium chloride (LiCl), what is the percent yield of lithium chloride (LiCl) ? * LiOH + KCl - LiCl + KOH A) 64.5% B) 88.6% C) 81.5% D) 92.8%

You aren't sure if your pH meter needs to be calibrated, so you put it in a buffer solution that has a known pH of 7. You take four separate readings of the solution with the pH meter. The meter reports the pH as 5.5, 8.6, 6.3, and 9.4.