What affect does attendance have on students' grades in science class? Write the independent variable, the dependent variable, and the hypothesis.

Ifa dozen nails weighs 1 pound, how many nails are in 7.6 pounds?

Which is an example of a heterogeneous mixture? Coffee, soil, gelatin or air

A pelican is born with a larger bill than other pelicans of the same species. When this pelican breeds, some of its offspring also have larger bills.

What are insulated foam cups most likely made out of? polyethylene polystyrene nylon thread vulcanized rubber

Which of the following would increase the rate of a chemical reaction between hydrochloric acid (HCl) and solid zinc metal (Zn) ? A. Decreasing the amount of Zn B. Performing the reaction at a lower temperature C.

How would each of the following procedural errors affect the results to be expected in this experiment? Give your reasoning in each case. (A) Not all of the liquid was vaporized when the flask was removed from the water bath.

What volume of 2.00 m must be added to 150.0 ml of 1.00 m chloroacetic acid to produce a buffer solution having a ph of 3.30?

What is the mass (g) of 500. ml water if the density is 0.9901 g/ml?

Predict what the population of the United States will be in the year 2010

Assume we could alter the conditions in the duodenum. Which of the following would be consistent with inserting a large volume of highly acidic chyme which contained a large amount of fat?