What is an atomic number, and why is it so useful in identifying elements?

Aluminum metal reacts with aqueous cobalt (II) nitrate to form aqueous aluminum nitrate and cobalt metal.

How many molecules are contained in 0.500 moles of hydrogen gas? A. 1.20 x 1024 molecules B. 6.02 x 10-23 molecules C. 3.01 x 10-23 molecules D. 3.01 x 1023 molecules

This is the chemical formula for nickel tetracarbonyl (a powerfully poisonous liquid used in nickel refining) : Ni (CO4) A chemical engineer has determined by measurements that there are 9.6 moles of nickel in a sample of nickel tetracarbonyl.

Table sugar is not a mineral because: Select one: a. it is in crystal form. b. it is made of more than one element. c. it is not made by a geologic process. d. Its chemical composition is always changing.

Discuss how to separate a mixture of iron filings salt sand and wood chips

What is true of an acidic solution at room temperature?

Why does a higher concentration make a reaction faster? There are more collisions per second and the collisions are of greater energy. Collisions occur with greater energy. There are more collisions per second.

A property of metals is high thermal conductivity which is

Do exorthermic reactions make surrounding hotter?

What's a certain indicator that a molecule is polar?