Which part of the experiment is not touched by the independent variable or is the normal/comparison

In numbering carbon atoms in the parent chain of a hydrocarbon, why would you number from right to left, rather than left to right

Asample of ammonia reacts with oxygen as shown. 4nh3(g) + 5o2(g) 4no(g) + 6h2o(g) what is the limiting reactant if 4.0 g of nh3 react with 8.0 g of oxygen? o2 because it produces only 0.20 mol of no. nh3 because it produces only 0.20 mol of no. o2 because it produces two times less no than nh3. nh3 because it produces three times more no than o2.

Predict the products butane (c4h10) + oxygen —>