40. 14 An energy pyramid shows the amount of
available at each feeding level in an ecosystem.

What does x represent in the formula for the compound xcl4?

For the reaction c6h14(g) & longrightarrow; c6h6(g) + 4h2(g), δp(h2)/δt was found to be 2.5 x 10-2 atm/s, where δp(h2) is the change in pressure of hydrogen. determine δp(c6h14)/δt for this reaction at the same time.

The half-life of a certain element is 100 days. how many half-lives will it be before only one eighth of this elementremains?