Name the compound of calcium used for disinfecting water. Give its chemical formula.​

In the cathode ray tube experiment, j. j. thomson passed an electric current through different gases inside a cathode ray tube in the presence of an electric field. in which two ways did this experiment change scientists’ understanding of the atom?

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

The diagram below shows the different phase transitions that occur in matter. which arrow represents the transition in which dew is formed?