As a scientist in a lab, you are handed an unknown a solid cylinder. The first thing you do is attempt to determine the density of material. You weigh the cylinder and find that it has a mass of 52 grams. You then place the cylinder into a graduated cylinder and it displaces 25 mL of water. What is the density of the unknown materials? * a. 0.481 g/ml
b. 0.481 G/ML
c. 2.08 g/mL
d. 1.300 g/ml

Imagine that you have produced several versions of lactase, each of which differs from normal lactase by a single amino acid. describe a test that could indirectly determine which of the versions significantly alters the three-dimensional shape of the lactase protein.

Sodium nitrite (nano2) reacted with 2−iodooctane to give a mixture of two constitutionally isomeric compounds of molecular formula c8h17no2 in a combined yield of 88%. draw reasonable structures for these two isomers. click the "draw structure" button to launch the drawing utility. place the two compounds in the appropriate boxes below.

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?