Draw a model with shapes to represent C3H8+5O2 4H2O+ 3CO2

If a polyatomic ionic compound has gained two hydrogen ions, then how does its name begin?

Calculate the mass of carbon in 97.0 g of sucrose c12h22o11

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.