Is baking soda a element, compound or a mixture?

Covalent network solids typically have melting points and boiling points. the chemical formula of a network solid indicates in the molecule.

How many moles of air are there in a human lung with a volume of 2.4 l at stp? explain your answer

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?