Suresh wants to add a switch so that he can switch on and off both bulbs at the same time. at which position should the switch be placed? (science)

Calculate the mass of silver needed to react with chlorine to produce 126g if silver chloride?

What are the similarities of physical and chemical change ?

Achemist has dissolved a certain substance in water. the chemist knows that more of the substance could be dissolved into the water before it stops dissolving. therefore