If a chemical reaction uses up energy the reaction is

Which phases describe air density?

Which statement best describes an ionic bond? A. An ionic bond involves a metal that transfers one or more electrons to a nonmetal B. An ionic bond involves two metals that exchange electrons C.

Calculate the average atomic mass of carbon if 98.90% of the atoms are C-12 (12.000000 amu) and 1.100% are C-13 atoms (13.003354 amu). Give your answer to the correct number of significant figures.

What is the mass in grams of 9.76 Ã 1012 atoms of naturally occurring lithium?

If water were a linear (not bent) molecule like co2, electrostatic interactions between water molecules would be much weaker. why?

Was the relationship among temperature, heat, and thermal energy?

What will most likely happen when a warmer air mass exists above a polar ice sheet? The temperature of the ice sheet will be lowered. Heat will be transferred from the air mass to the ice. The air mass will exert high pressure and rise upwards.

A 2.00 L sample of gas at 35 C is to be heated at constant pressure until it reaches a volume of 5.25 L. To what Kelvin temperature must this sample be heated?

Of the following reactions, which one produces oxygen gas? Fermentation Anaerobic respiration Aerobic respiration Photosynthesis

Describe the electrodes in this iron-copper galvanic cell.