An element has 9 protons, 10 neutrons, and 11 electrons. What is the name of the element?

The speed of light is around 6.706×10^8 miles per hour. what is the speed of light in units of miles per minute?

If i make a solution by adding 83grams of sodium hydroxide to 750ml i’d water what is the molarity of sodium hydroxide

3. how much energy in joules is required to evaporate .0005 kg of liquid ammonia to vapor at the same temperature? 4. how much energy ( in megajoules ) is given up by .75 kg of water at 0c when it freezes to form ice at 0c? 5. explain how heat works between and at critical temperatures?