In the combustion of hydrogen gas, hydrogen reacts with oxygen from the air to form water vapor.
hydrogen+oxygen-> water
if you burn 39.7 g of hydrogen and produce 355g of water, how much oxygen reacted?

Predict whether the changes in enthalpy, entropy, and free energy will be positive or negative for the boiling of water, and explain your predictions. how does temperature affect the spontaneity of this process?

Miner's coal distributors does not mine coal itself, nor does it even store or handle the coal. instead, miner's solicits orders for low sulfur coal from other firms, then purchases the required amount from suppliers and directs them to ship the coal to its customers. what is miner's

May someone me with these science questions