1. Which of the following are properties of non-metals? A. mostly solids, dull, brittle, reactive, conductors
B. mostly solids, luster, high density, conductors
C. mostly gases, brittle, dull, low density, insulators
D. solids, luster, brittle, conductors, medium density

Given sno2 + 2h2 - sn + 2h20 tin oxide reacts with hydrogen to produce tin and water. how many moles of sno2 are needed to produce 500.0 grams of sn?

What is true for a substance that releases energy

2. what two items do autotrophs take from the environment to produce their food? 3. what are the two items that are released during transpiration from leaves? 4. what are the two membranes of the system? a. what are the two stages of photosynthesis? what are the two parts of photosynthesis?