Determine the heat energy released when a 4.30 gram piece of aluminum foil from the oven cools from 191oC) to 24oC.  The specific heat of Al is 0.897 J/goC. Please show your work with your answer.  You can use the equation editor   above if needed.

Which symbol represents the atom containing 41 electrons and 52 neutrons?  

Write the formula for carbonic acid. NOTE: Since entering answers does not allow for subscripts, the formula Cs2S is written as Cs2S.  

An unknown gas has a density of 5.86 g/L at STP.  What is the molar mass of the gas? Please show your work with your answer.  You can use the equation editor   above if needed.

Which of the following statements is true regarding fiber?

What is the formula for sodium sulfate? NOTE: Since entering answers does not allow for subscripts, the formula Cs2S is written as Cs2S.  

Which one of the following series contain a transuranium, a gas, and a rare earth, IN THAT ORDER?

Select ALL of the following that exist as a gas at room conditions:

Balance the following equation by selecting the correct coefficient in front of each formula. ___Ba(OH)2 + ___H3PO4

Which one of the following is the smallest atom size?