Which of the following has a positive enthalpy without a temperature change?

condensing gas

evaporating a liquid

cooling a solid

cooling a liquid

Which of these is an example of a hydrosphere-cryosphere interaction? A. precipitation falling on rocks B. water vapor escaping into space C. water transporting seeds down river D. water currents melting the glaciers in Antarctica

Which characteristic is a property of water? A. densest as a solid B. low surface tension C. nonpolar molecules D. strong cohesion E. weak adhesion

If 224 g of iron reacts with oxygen, forming 320 g of iron oxide, how much iron oxide would 112 g of iron produce?

Two friend on roller skate are standing 5m apart facing each other. one of them throw a ball of 2 kg toward the other, who catches it, how will this activity affect the position of the two? explain your answer

Is supports combustion a chemical or physical property

What is the pressure, in mm Hg, of 2.50 moles of an ideal gas if it has a volume of 50.0 liters when the temperature is 27.0° C?

What element has the same valence electrons as carbon A) N B) AI C) Si or D) Be

What element is represented by the following electron configuration: 1s22s22p63s23p64s23d4 Question 2 options: Cr Ca Ge Ar

He substance, cocl2, is useful as a humidity indicator because it changes from pale blue to pink as it gains water from moist air. What is its name?

The weighted average atomic mass of an element depends upon the a. relative abundance of protons in the element b. mass and relative abundance of each isotope of that element c. mass and relative abundance of each neutron of that element d.