A 10.0-gram sample of H2O (l) at 23.0°C absorbs 209 joules of heat. What is the final temperature of the H2O (l) sample? (1) 5.0°C (3) 28.0°C (2) 18.0°C (4) 50.0°C

Joseph drives 25miles North in 15 minutes then he drives 40 miles east in 30 minutes, then he uses cruise control option for 1 hour and covers 70 miles on the highway and finally drives 15 miles in 15 minutes. What was his average speed?

If there is 0.2 M glucose along with 0.15 M NaCl in solution, what is the osmolarity of this solution? If there is 0.2 M glucose along with 0.15 M NaCl in solution, what is the osmolarity of this solution? 1. 500 mOsm 2. 2.15 Osm 3. 350 mOsm 4. 2.

Which rock is most likely to be to be damaged by acid rain

Sudden heavy rains cause what kind of conditions that can then cause flooding

There are gps satellities orbiting the earth a) 28 b) 24 c) 42 d) 10

Caffeine is about 10 times as soluble in hot water as in cold water. A chemist puts a hot-water extract of caffeine into an ice bath, and some caffeine crystallizes. Is the remaining solution saturated, unsaturated, or supersaturated and why?

Students in a science class learn that groundwater is an important source of drinking water for many communities. They construct a model to study how leaking chemicals from a landfill can affect groundwater.

Given the energy levels of electrons in a hydrogen atom (table), rank the photons emitted by the following electron transitions from longest to shortest wavelength. n=4 to n=3 n=4 to n=2 n=2 to n=1 n=3 to n=1

Define/differentiate a. enzyme b. active site c. substrate d. enzyme vs Isoenzyme e. Cofactor vs Covalent Modulators vs Coenzyme e. allosteric inhibition vs allosteric activation

A solution has a hydrogen ion (or hydronium ion) concentration of 1.00 * 10-9 M. What is the pH of the solution? 7.5 8.0 9.0 8.5