Barbara completed an assignment for extra credit in science class. she used a ph meter to find the ph of different substances. after she finished measuring the phs, she created a diagram that showed the substances arranged in order from the most acidic to the most basic if barbara added lemon juice ph 2.2 to her investigation, where should it appear in her diagram

In france, grapes are 1.95 euros per kilogram. what is the cost of grapes, in dollars per pound, if the exchange rate is 1.14 dollars/euro? (2.6)

An alloy contains 66 g of pure zinc. what is the percentage of zinc in the alloy? express your answer to two significant figures and include the appropriate units.

You exhale co2 which is produced during cellular respiration.  co2 combines with the water in your blood's plasma to make up one half of the body's most important buffer pair, carbonic acid.  the more physical activity you engage in, the more co2 your body is producing.  you can see this by putting some of the cabbage indicator in a glass and then blowing bubbles into it through a straw.  can you see a change in the color of the indicator?