Select the correct answer. How does an atom become a positively charged ion? A. By gaining one or more electrons B. By gaining one or more neutrons C. By losing one or more electrons D. By losing one or more neutrons

What are homogeneous mixtures of metals commonly called? alloys colloids compounds suspensions

Why does oil and water doesn't get along?

Which list contains all pure substance

A food chain is a. All the biotic interactions b. All the feeding relationships in the ecosystem c. The link between abiotic and biotic factors D. The single sequence of organisms feeding TWO examples of abiotic factors needed in an ecosystem are a.

During the GFP purification experiment, the instructor will have to make breaking buffer for the students to use. This buffer contains 150mM NaCl. Given a bottle of crystalline NaCl (M. W. = 40g/mol), describe how you would make 500ml of 150mM NaCl.

Penny bought a club moss plant for her water garden. She needs to know how tall the plant will grow so she knows how much space it will need.

Which of the following is not a producer? Mushroom Tulip Grass Pine Tree

Phosphorus forms a number of oxohalides, x3po, in which x may be a f, cl, or br atom. the most common of these, phosphoryl chloride, is obtained as follows:

Which statement is true about the speed of light waves in a medium? a. Depends on the temperature of the light wave b. Decreases with a decrease in density of medium c. Decreases with an increase in density of medium d.

What's a certain indicator that a molecule is polar? the molecule has a nonpolar covalent bond and the dipole is cancelled due to symmetrical arrangement of atoms the molecule has a polar covalent bond and the dipole is cancelled due to symmetrical