Consider the equations below.
H2 → 2H
C2H2 + H → C2H5
C2H5 + H → C2H6

Will mark brainliest how many electrons can be held in the energy level n = 4?

When the chemicals iron sulfide (fes) and hydrochloric acid (hcl) are combined, bubbles appear from the mixture. 1. does the appearance of bubbles indicate a physical or chemical change? 2. why do the bubbles indicate this change? 3. what property is this?

In an experiment, 45g of silicon tetrachloride are treated with 45ml of water. what is the theoretical yield in grams of hcl