If there are 6.73 x 1027 atoms of iron, how many moles of iron

are present?

State the meaning of the term redox. Can't find the perfect answer.

The burning of natural gas in a gas stove is an example of a combustion reaction. natural gas is mostly methane, ch4. the o2 gas comes from the air. which of these is the correct chemical reaction for this?

Which type of chemical reaction does this word equation exemplify: calcium oxide combines with silicon dioxide to form a single product, calcium silicate?

What does the force of gravity on an object depend on A: Molecules B: The objects mass C: compounds D: charged particles

Nitrogen can ionically bond with an unknown element X from group 2. How many ions of element X are required to create a stable ionic compound with nitrogen? A) 2 B) 3 C) 4 D) There is not enough information.

What is the basic building block of matter to a chemist

Between magnesium and calcium, which has the highest ionization energy, and why?

approximately how many different cells can be found in a human cell? A. less than one hundred B. less than 10 C. more than a million D. more than one thousand

If I have a 200 L container filled with nitrogen at a pressure of 1.0 atm, how many moles of nitrogen are present at 25 degrees C?

In the periodic table, a set of properties repeats from