Mass does not change during a chemical change. is the same true for physical change?

Given w = 0, an endothermic reaction has the following.

Which of the following would you predict to have a positive value for º? AgCl (s) → Ag + (aq) + Cl - (aq) H2O (g) → H2O (l) 2 Na (s) + Cl2 (g) → 2NaCl (s) Br2 (l) → Br2 (s)

Consider the cells of a plant. Discuss at least two chemical processes that occur due to the various functions carried out by different plant cells.

What is the mol of 8.50g of nh3

I don't know how to find area

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.