A 2.5 mg sample of magnesium powder is ignited with 2 mg oxygen in a sealed container. All of the magnesium is consumed and 4.15 mg of white solid magnesium oxide is formed.

Find the mass of the unreacted oxygen

Volume is a measurement of how fast particles of a substance are moving. true or false.

Why is the atomic radius of sodium much smaller than the atomic radius of potassium

Ice cream in a bowl with whipped cream and sprinkles is best describe as

If an atom of polonium-218 were to undergo alpha emission, followed by two beta emissions, which nuclide would result?

Which will provide the most direct measure of pH by measuring the hydrogen ion concentration of a solution? A. pH meter B. litmus paper C. phenolphthalein D. bromthymol blue

What property do most metals share

Express this amount in dozens. (Use decimal form.) 75 pies

A series circuit has two 5.0-ohm resistors and a power source of 9.0 volts. How will the current be affected and what will it be if another resistor (with a resistance of 7.5 ohms) is added to the circuit? A. increase; 0.51 amps B. increase; 0.

Which type of reaction will occur when equal volumes of 0.1 M HCl and 0.1 M NaOH are mixed 1. Neutralization 2. Ionization 3. Electrolysis 4. Hydrolysis

What is molarity of heavy water?