If 12 mol of lithium were reacted with excess nitrogen gas, how many moles of lithium nitride would be produced?

4 moles

Explanation:

From the balanced chemical equation, it can be seen that 6 moles of lithium react with 1 mole of nitrogen to give 2 moles of lithium nitride.

Now as nitrogen is in excess, lithium is the limiting reagent as it limits the formation of products.

As 6 moles of lithium produce 2 moles of lithium nitride.

12 moles of lithium will produce= of lithium nitride.

we can conclude that the melting point of table salt is above room temperature (it's actually 801 deg c). the melting point of mercury must be below room temperature (- 39 deg c).

while cooking a piece of 1/2 pound beef steak, a cast iron pan (2.4kg in weight) was heated 260 celsius.