If the molar heat of vaporization for water is 40.7 kJ/mol. What is the molar heat of condensation?

What are the percent by mass of copper in penny lab

What is the ima of the 1 st class lever in the graphic given? 2 3 0.5

Great amounts of electromagnetic energy from our sun and other bodies in space travel through space. which is a logical conclusion about these electromagnetic waves? their energy must be very their frequency must be very low these waves can travel without a medium they only travel through a vacuum of space