The family of elements that has a 2 - oxidation number is the:

What mass of Cu (s) would be produced if 0.40 mol of Cu2O (s) was reduced completely with excess H2 (g) ?

Which biomolecule contains hydrogen, oxygen, nitrogen, carbon and phosphorus?

Why does acids that has been accidentally spilled on a book cause the colour of the book cover and the ink to change?

Why don't we notice changes in the elevation of the land due to the moons pull?

What is the reaction between aspirin and hydrochloric acid

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.