According to the octet rule most elements need_valence electrons.

The chemical equation below shows the burning of magnesium with oxygen to form magnesium oxide 2Mg + 02 - - > 2MgO the molar mass of O2 is 32.0g/mol. what mass, in grams, of O2, is required to react completely with 4.00 mol of Mg? a. 2.00 b. 64.0 c.

The majority of the elements on the periodic table are classified as this type and are good conductors of heat and electricity.

Four competitors raced their bicycles in a 1000-meter race. During the last 300 meters, each bicycle was moving with the same speed. Using the graph, determine which competitor was riding the lightest bicycle.

The amount of energy needed to remove an electron from a neutral atom is known as

Clare is a 14-year-old female who lives with her 29-year-old mother and three younger siblings in a two-bedroom apartment in a housing project. At school, Clare has acted out in class and has twice been held back a grade-level.

Co (g) + h2o (g) ⇌co2 (g) + h2 (g) kp=0.0611 at 2000 k a reaction mixture initially contains a co partial pressure of 1320 torr and a h2o partial pressure of 1760 torr at 2000 k. calculate the equilibrium partial pressure of co2.

Why does water dissolve sugar? Explain your answer!

A solution is prepared by mixing 20.0 g of NaNO3 with 100. mL of water. What is the percentage mass of the solution?

As streams flow through Stone Mountain, layers of sand build up. Over time, the sand particles form a sedimentary rock called sandstone.

Q. who developed orbit model of the atom? A. Neils Bohr