A new penny has a mass of 2.49 g and a volume of 0.349 cm3. Is the penny made of pure copper?

Metamorphic rock that does not separate into layers when broken is called

Limestone is used to make cement and mortar. a. True b. False

4. Calculation of theoretical yield and percent yield You balanced this reaction earlier: Mg (s) + HCl (aq) H2 (g) + MgCl2 (aq) You used an excess amount of HCl (aq) for the reaction, therefore Mg is your limiting reactant.

What did Dimitri meandered discover

Whenever matter undergoes a physical or chemical change no atom are created or destroyed

Where should you keep your glass of soda if you want it to remain fizzy

Why do the atoms in a piece of copper metal have no net charge? -The charges of the positive and negative copper ions cancel each other out. -The number of electrons surrounding each copper nucleus doesn't change.

In a closed system, the total heat given off by warmer substances equals the total heat energy gained by cooler substances (qwater = - qliquid).

What compound will not give oxygen on heating

Choose one property of water that makes it unique. Describe the property and explain the chemical or physical?