What charge do the halogen ions have? What change do the Alkali Metal ions have?

What charge do the Alkaline Earth Metal ions have?

What is the ratio of the Alkali Metals to oxygen when combined to form a compound?

What is the ratio of the Alkaline Earth Metals to the Oxygen when combined to form a compound ?

Achlorine atom has 17 protons and 18 neutrons. what is its mass number? what is its atomic number?

4r-134a enters the condenser of a residential heat pump at 800 kpa and 50°c at a rate of 0.022 kg/s and leaves at 750 kpa subcooled by 3°c. the refrigerant enters the compressor at 200 kpa superheated by 4°c determine (a) the isentropic efficiency of the compressor, (b) the rate of heat supplied to the heated room, and (c) the cop of the heat pump. also, determine (d) the cop and rate of heat supplied to the heated room if this heat pump operated on the ideal vapor-compression cycle between the pressure limits of 200 and 800 kpa. (0.757, 4.37 kw, 5.12, 6.18, 3.91 kw)

Select all the correct answers.which two statements are true? a moving magnetic field creates an electric field.a constant magnetic field creates an electric field.a constant electric field creates a magnetic field.a moving electric field creates a magnetic field.resetnext