1.Nitric oxide is made from the oxidation of ammonia. What mass of nitric oxide can be made from the reaction of 7.202 g NH 3 with 15.51 g O 2 ? 2.4
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1.Nitric oxide is made from the oxidation of ammonia. What mass of nitric oxide can be made from the reaction of 

7.202 g NH3 with 15.51 g O2?


    2.4 NH3(g) + 5 O2(g) → 4 NO(g) + 6 H2O(g)????


3.You need to make an aqueous solution of 0.164 M iron(II) nitrate for an experiment in lab, using a 250 mL volumetric flask. How much solid iron(II) nitrate should you add?


4.The element Erbium, Er, has five abundant isotopes 164Er, 166Er, 167Er, 168Er, and 170Er. The difference among these five isotopes is the ______. which one?

a. number of electrons

b.number of protons

c.charge on their most commonly formed ion.

d.number of neutrons

e. number of atoms in one mole


5.The oxidation state of boron in boron oxide B2O3 is?

6.The oxidation state of oxygen in oxygen gas O2 is ?

7.The oxidation state of chromium in dichromate ion Cr2O72- is ?


8.Write the net ionic equation for the precipitation of silver chloride from aqueous solution:_________+__________---->___________


9.The reaction of tetraphosphorus decaoxide with water produces phosphoric acid.


    __ P4O10 + __ H2O → __ H3PO4


What are the respective coefficients when the equation is balanced with the smallest integer values?


10.The hydronium ion concentration in an aqueous solution at 25°C is 3.3×10-2 M.

The hydroxide ion concentration is_____

The pH of this solution is______

The pOH is ________

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Subject: Chemistry, Science
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