Consider the diagram below. What does D represent?

A. energy of the products

B. energy of the reactants

C. reactants, Q + R

D. products, N + M

At which temperature and pressure would a sample of helium behave most like an ideal gas?

Which pure substance can be classified as an element? -H2 -NO3 -NaCl -H2SO4

Why don't all the group 1 metal carbonates decompose in the lab?

How many moles of co are contained in a 5.00 l tank at 155°c and 2.80 atm?

What is the main reason a substance changes from one state of matter to another? A. The substance's color changes. B. The substance's temperature changes. C. The substance's size changes. D. The substance's shape changes.

When is the Sun directly overhead in the continental United States? A. always B. in the summer C. never D. at noon

Predict whether or not a precipitate forms upon mixing 175.0 ml of a 0.0055 mkcl solution with 145.0 ml of a 0.0015 m agno3 solution. identify the precipitate, if any.

The nucleus of one boron atom has 5 protons and 4 neutrons wjat is the total number of electrons in a boron atom

Pure sodium metal explodes when it makes contact with water, and chlorine, in its natural state, is a deadly, poisonous gas. When these two chemicals combine, they form a harmless, white powder known as sodium chloride or table salt.

Why reducing power of elements increase, on moving down a group?