What is the ph value of lemon juice? can any one me

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In this chemical reaction, 325 grams of barium (ba) react completely. how many moles of lithium (li) are produced?

Hydrogenation reactions, in which h2 and an "unsaturated" organic compound combine, are used in the food, fuel, and polymer industries. in the simplest case, ethene (c2h4) and h2 form ethane (c2h6). if 140 kj is given off per mole of c2h4 reacting, how much heat (in mj) is released when 12 kg of c2h6 forms?