What do nucleus act as

Air is 21% oxygen by volume. Oxygen has a density of 1.31 g/L. What is the volume in liters of a room that holds enough air to contain 55kg of oxygen?

A mixture of table salt and ice is used to chill the contents of hand-operated ice-cream makers. what is the molality of salt in a mixture of 2.00 lb of nacl and 12.

Which pair of molecules is not a polar bond? OA. N-O OO B. C-O C. O-H OD. 0-0

You have a hard glass flask that you plug up with a stopper at room temperature (25 C) and an internal pressure of 1 atm. If you decrease the temperature inside the flask to 5 C, what will the pressure be inside the flask?

A reaction between an acid and a base is called a

A water molecule consists of an oxygen atom and two hydrogen atoms covalently bonded in a bent shape. Oxygen however, attracts the shared electrons more strongly than the hydrogen atoms. This structure leads to which important property of water? a.

How much ko2 is needed to react with 75.0 l of carbon dioxide at - 25˚c and 215 kpa?

Is limestone a mixture or a pure substance

What is the number of electrons in the outermost energy level of an oxygen atom

Click the button that shows the correct relationship of the electron affinities of the elements sodium and phosphorus.