The Lewis dot formula for formaldehyde, H2CO shows I. three single covalent bonds II. one unshared pair of electrons III. one double covalent bond IV. two unshared pair of electrons V. two single covalent bonds

The presence of SO2 in the atmosphere and the sulfuric acid it produces result in the phenomenon is …….. 2SO2 + O2  →  2SO3 SO3  +  H2O  →  H2SO4

The highest temperature ever recorded in the US is 134 Fahrenheit. Express this temperature in Celsius.

The volume of a 10.00% glucose solution is 8.25 mL. Its density is 1.039 g/mL. What mass does this solution have? Hint: Density = mass / volume

Balance the chemical equation: As2O5  +  Ca(OH)2   →  Ca3(AsO4)2  +  H2O The sum of all the coefficients in the balanced equation is: (don’t forget to count coefficients of 1)

Which response lists all of the following properties of sulfur that are chemical properties and no physical properties?  I. It is a solid at room temperature and atmospheric pressure II. It undergoes combustion to produce carbon dioxide and water III. It boils at 4200 Celsius IV. Its density is 2.25 g/mL V. It is not attracted strongly by a magnet

Will PbI2 precipitate when the Mixture 2 solutions (10 mL 0.01 M Pb2+  + 5 mL 0.01 M I- in 35 mL water) are combined? Ksp for PbI2 is about 10-8                                              PbI2(s)  ↔  Pb2+(aq)  +  2I-(aq) Choose (A) or (B)

To determine the solubility of a solute in water, one must be prepare a solution that is:

Which of the following statement best represents gamma radiation?

Write the molecular formula for an alkane with 4 carbons.  What is this hydrocarbon called?