Using values from the table of standard reduction potentials, calculate the cell potential (in V) of the following cells. 3+ 2+ (a) Cr(s) | Cr" (aq) || Pd´" (aq) | Pd(s) 2+ 2+ (b) Zn(s) | Zn (ag) || Ni^™ (ag) | Ni(s) 2+ (c) Zn(s), ZnS(s) | S´ (aq) || Sn" (ag) | Sn(s)

Calculate the amount of heat needed to boil 189. g of water (H₂O), beginning from a temperature of 52.0 °C. Round your answer to 3 significant digits. Also, be sure your answer contains a unit symbol. 0 x10 X 3

Calculate the amount of heat needed to boil 126. g of water (H₂O), beginning from a temperature of 99.3 °C. Round your answer to 3 significant digits. Also, be sure your answer contains a unit symbol. Ú ☐ x10 X

Pheromones are compounds secreted by females of many insect species to attract mates. Typically, 1.00 × 10−8 g of a pheromone is sufficient to reach all targeted males within a radius of 0.500 mi. Calculate the density of the pheromone (in grams per liter) in a cylindrical air space having a radius of 0.500 mi and a height of 46.0 ft (volume of a cylinder of radius r and height h is πr2h). Enter your answer in scientific notation.

A 145.3 mL sample of carbon dioxide was heated to 301 K. If the volume of the carbon dioxide sample at 301 K is 394.6 mL, what was its temperature at 145.3 mL?

The world's oceans have a combined volume of 3.204 x 108 miles3. (b) The Atlantic Ocean has a volume of 3.1 x 108 km3, and the Pacific Ocean has a volume of 6.6 x 108 km3. What percentage of the world's ocean volume is occupied by bodies of water OTHER THAN the Atlantic and Pacific Oceans?

the carat(ct) is a unit of mass used for measuring gemstones and pearls. it is believed that the word comes from Greek for carob seed, because carbo seeds were used to measured jewelry throughout history. in modern times it has been using jewerly measurment, which of the following set up will give the correct converstion for 1.00 troy ounce (t oz) of gold to carat (ct) 24 (g)=1 (dwt) 20(dwt)=1 troy ounce(t oz) 12 (t oz) = 1 troy pound (lb t) 1 (g) =0.0648 (g) 1 carat (ct) =0.200 (g) a) 1.00 t oz=1lb t=12 toz=20dwt=24g=1ct b) 1 toz=1dwt=24g=1gr=20dwt=1lbt=1lb t=1ct c)1.00 t oz=20dwt=24g=1/0.200 ct c)1.00 toz=24g=1gr=1ct

A student calibrated a 10-mL graduated cylinder using water. The empty graduated cylinder weighed 24.378 grams. When it was filled with 9.89 mL of deionized water, it weighed 33.826 grams. The temperature of the water was 21.8oC. What is the density of water, based on these measurements?

A 395.9 mL sample of carbon dioxide was heated to 323 K. If the volume of the carbon dioxide sample at 323 K is 645.2 mL, what was its temperature at 395.9 mL?                    K

When performing the calculation 34.530 g + 12.1 g + 1 222.34 g, the final answer must have