Which balanced equation represents a redox

reaction?

(1) CuCO3 (s) = = > CuO (s) + CO2 (g)

(2) 2KClO3 (s) = = >2KCl (s) + 3O2 (g)

(3) AgNO3 (aq) + KCl (aq) = = >AgCl (s) + KNO3 (aq)

(4) H2SO4 (aq) + 2KOH (aq) = = > K2SO4 (aq) + 2H2O (l)

How many atoms are in each of the following? a) 1.0g of hydrogen atoms, each of mass 1.0u b) 12.0g of carbon atoms, each of mass 12.0u c) 23.0g of sodium atoms, each of mass 23.0u

Consider the chemical equation for the production of water: 2 H2+O2>2 H2O. If 100 grams of oxygen gas are used, what would the percent yield be if 75 g of H2O was produced?

Which transverse wave has the shortest wavelength?

When examining features on the ocean floor, like a volcano, how would it appear? severely eroded not eroded at all only somewhat eroded barely eroded compared to land volcanoes Approximately what percentage of the world's rock record is attributed

There (is) are___ compound (s) in the glucose formula

Why did most scientists reject Wegner's theory for nearly a half century?

Define prediction and explain how it is used to formulate a hypothesis.

A group of organisms that breed and produce offspring that can breed. A. Species B. ecosystem C. Biodiversity

What is the molality of a solution containing 100 grams of glucose (C6H12O6, molar mass = 180 g/mol) dissolved in 2.5 kg of water? 0.22 m 72 m 7200 m 40 m

A battery is constructed based on the oxidation of magnesium and the reduction of cu2+. the initial concentrations of mg2 + and cu2 + are 1.2*10-4 m and 1.44 m, respectively, in 1.0-liter half-cells. how long can the battery deliver 5.