If 50.0 g of H₂ and 132.5 g of O₂ react, how many moles of H₂O can be produced in the reaction below? 2 H₂(g) + O₂(g) → 2 H₂O(g)

What happened to the amount of carbon dioxide in the atmosphere from 2010–2017?

How many moles is 14.5 cm^3 of platinum? the density of platinum is 21.45 g/cm^3.

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.