Which pair of species have the most nearly identical atomic and molecular properties? 1. 35/17cl and 80/35br 2. 7/3li and 9/4be 3. 23/11na and 23/11na+ 4. 19/9f and 19/9f− 5. 12/6c and 13/6c

Two metal blocks that have slightly different temperatures are placed next to one another. after five minutes, they both have lower but equal temperatures. according to the law of conservation of energy, what  most likelyhappened? energy was created inside the blocks. energy was destroyed inside the blocks. energy was absorbed into the blocks from outside the system. energy was transferred from the warmer block to the cooler block.

If 16.00g of hydrogen gas reacts with 126.73g of oxygen, how many grams of water are yielded? (both reactants are completely consumed in the reaction.)

Why is the bottom layer of a trophic pyrimid the