A group of atoms held together by covalent bonds is called

A student described two properties of a substance as shown. Properties of Substance Property Description C - A known mass of the substance gives off heat when it is burned. D - A substance can be stretched out to become a long wire.

How are the empirical and molecular formula related answers. coim?

When did Pangaea begin to break apart? a. 20 million years ago c. 250 million years ago b. 100 million years ago d. 2 billion years ago.

When the [H+] in a solution is 1.7x 10^-9 M, what is the pOH? A) 8.80 B) 5.20 C) 14 D) 8.60

Why is a dentist chair is used on a pneumatics system and not a hydraulic system? Explain?

Water is known as the 'universal solvent' because: Water is capable of dissolving every substance. Water can dissolve many ionic and covalent compounds. Water can dissolve many substances, but often requires large amounts of heat to be added.

Which of the following would be expected to form hydrogen bonds with water? Choose all that apply. (A) methylamine (B) N-methylpropanamide (C) acetaldehyde (D) cyclopentane (E) None of the Above

How does a lava plateau form?

A sphere has a mass of 64 g, and a density of 2.0 g/cm3. what is the radius of the sphere

Why is the sun so hot what is the sun made up of