Which is a drawback of agricultural technology?

A. More food is produced

B. Some dangerous chemicals are used.

C. Some pests are used

D. People can communicate better.

What are the two causes of density in deep current waters? a. Salinity (how much salt) of the water and high temperatures c. Oxygen content of the water and high temperatures. b. Salinity (how much salt) of the water and low temperatures d.

Which forms of energy are used when: (a) you ride in an automobile? (b) you bounce a basketball? (c) you boil water to make hot chocolate?

Calculate the ph of a solution containing 0.0451 m potassium hydrogen tartrate and 0.028 m dipotassium tartrate. The ka values for tartaric acid are 9.20 * 10-4 (ka1) and 4.31 * 10-5 (ka2).

Which change in oxidation number indicates oxidation

What is the pH of an acidic solution? A. Between 0 and 7 B. 7 C. Above 14 D. Between 7 and 14

What is the molarity of a solution that has 548 grams of HCl dissolved in 1.50 l water?

Steve puts some cheddar cheese in a pan on the stove and starts to melt it. After a little while, there is a layer of oil floating on top of the cheese. From the way the cheese melted, Steve knows it is a A Element B Solid C Mixture D Pure Substance.

Which experimental feature of the MALDI-MS technique allows the separation of ions formed after the adduction of tissue molecules? A) Distance travelled by ions depends on the ion charge. B) Velocity of ions depends on the ion mass-to-charge ratio.

Which temperature is required for the cell potential to be the standard cell potential? A) - 273°C B) 100°C C) 25°C D) 0°C

1. the purpose of the aqueous solutions in a galvanic cell is to? a. provide ions to be oxidized and reduced b. provide a path for the free flow of electrons c. maintain charge balance in the cell d. correct any volume changes in the cell 2.