Which type of reaction has an element and a compound as both the reactasnt and the product?

What is the ph of a 4.8 m pyridine solution that has kb = 1.9 * 10-9? the equation for the dissociation of pyridine is?

If a bond is currently trading at its face (par) value, then it must be the case that: A. the bond's yield to maturity is equal to its coupon rate. B. the bond's yield to maturity is greater than its coupon rate. C.

an inflatable toy has a volume of 310 mL. when a child takes it aboard an airliner the atmospheric pressure is 0.995 atm. as the airliner climbs, the cabin pressure drops, the toy expands to a volume of 440 mL.

Give one chemical and physical property of wood.

Which of the following is the best explanation for why finches on one of the islands in the Galapagos have large beaks while finches on another island have small beaks? a.

The relationship between pressure and temperature of a gas, when volume and moles of a gas are held constant, is: P*T = k. TRUE FALSE

The system is said to be in dynamic equilibrium when: Select one: a. there is no longer any net change in the concentrations of products or reactants. b. the forward and reverse reactions come to a halt. c. None of these d.

You have a 1 L container of a gas at 20 C and 1 atm. Without opening the container, how could you tell whether the gas is chlorine or fluorine? a. measure the mass of the gas b. measure the speed of the gas molecules c.

A 1.268 g sample of a metal carbonate, MCO3, was treated 100.00 mL of 0.1083 M H2SO4, yielding CO2 gas and an aqueous solution of the metal sulfate. The solution was boiled to remove all of the dissolved CO2 and then was titrated with 0.1241 M NaOH.

1. According to the article, which country may have a greater population than China by the year 2050? A. China B. Kenya C. India D. Germany 2. What does the article list as one reason that drives couples in India to have more children? A.