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How many of the following metals is/are type II metal(s)? (a)  Au             (b)   Mg               (c)  Zn                   (d)  Co                (e)  Na

What is the percent composition of O (% O) in C7H12O20? Atomic weights of C = 12.0, H = 1.0, O = 16.0 A)  20.2 B)  2.88 C) 76.9 D)  no correct answer given

Which of the following is the the correct Lewis structure for SiS2, silicon disulfide? 1           2        3

The state of matter with a indefinite shape.  

If you have 8.36 x 1026 molecules of H2O.  How many moles of H2O do you have? A)  13.9 mole B) 1390 mole C) 5.03 x 1050 moles D) 0.000720 moles

What is the volume of 0.255 mole of helium with a pressure of 74.8 atm at 280. K. (R= 0.0821 L ∙ atm / mol ∙ K) A) 0.155 L B) 0.784 L C) 0.0842 L D) none of the above

The total number of nonmetallic atoms in Mn2(C2O5)4 is  

How many molecules of acetone in 11.0 moles of C3H6O?  

Calculate the number of grams of CO produced when13.0 g of C (carbon) reacts completely in the following reaction? Atomic weights of C = 12.0, O = 16.0                                     2  Ca3(PO4)2  +  6 SiO2   +   10 C     —–>   P4   +  6  CaSiO3   +  10 CO    

The empirical formula of a compound is CH.  If the molar mass of this compound is 78.0 g, then the molecular formula is (Note: all the numbers in the answers are subscripts)