Aheat pump is used to heat a house in the winter and to cool it in the summer. during the winter, the outside air serves as a low-temperature heat source; during the summer, it acts as a high-temperature heat sink. the heat-transfer rate through the walls and roof of the house is 0.75 kj s—l for each c of temperature difference between the inside and outside of the house, summer and winter. the heat-pump motor is rated at 1.5 kw. determine the minimum outside temperature for which the house can be maintained at 200c during the winter and the maximum outside temperature for which the house can be maintained at 250c during the summer.

Which is a difference between molecular compounds and ionic compounds? select the correct answer below: question 5 options: molecular compounds typically form between a metal and a nonmetal, while ionic compounds typically form between nonmetals. molecular compounds result from the transfer of electrons between atoms to form ions, while ionic compounds result from the sharing of electrons between neutral atoms. molecular compounds are formed of discrete, neutral molecules, while ionic compounds are formed of large repeating arrays of opposite charges. molecular compounds have high melting points and high boiling points, while ionic

A50.0 ml sample of gas at 20.0 atm of pressure is compressed to 40.0 atm of pressure at constant temperature. what is the new volume? 0.0100 ml 0.325 ml 25.0 ml 100. ml

Choose all the answers that apply. fluorine (f) has an atomic number of 9 and an atomic weight of 18.99. fluorine has a. 9 protons b. 10 neutrons c. 18 electrons d. an atomic mass of 19 e. at least one isotope