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8 Cards in this Set
- Front
- Back
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Formation
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The reactants are in their standard state. Carbon is a solid.
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The following unbalanced equation shows ther eaction of ammonia with cupric oxide. if the coefficient in front of the NH3 is one, what is the coefficient in front of Cu?
NH3 + CuO --> Cu + N2 + H20 a) 3 b) 3/2 c) 1 d) 1/2 |
The coefficient in front of cu is 3/2 choice b
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How many atoms are in 36.4 g sample of SF6 gas?
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1.06 x 10^24 because 7 atoms in each molecule.
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BrO3- + Br- + H+ --> Br2 (l) + H20
ratio of bromate to bromide? |
The ratio of bromate to bromide is 1 to five, because Br5+ gets these electrons from Br- requiring five of them.
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What is the most likely reason for the apparent stability of Cu2I2
a) the copper is actually in the +2 oxidation state b) Cu2I2 contains copper in both the 0 and +2 oxidation states. c) the potassium from the KI keeps it from being oxidized d) it does not react because it is insoluble |
d) Cu+ is unstable in aqueous solution. CuI is precipitated out of solution, means it is insoluble.
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In the reaction Cu+2 (aq) + I-(aq) --> I2 + Cu2I2 (s) the precipitating reagent, iodide acts as a:
I. Oxidizing agent II. Reducing agent III. Complexing agent |
Reducer- Oxidation state of iodine in iodide is -1 oxidation state of iodine elemental is 0.
IOdide is losing electrons and becoming oxidized- its the reducing agent. A) |
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Avogadro's number is not equal to:
a) the number of atoms in 11.2 L of 02 at STP b) number of atoms in 1 mole of He at STP c) the number of electrons in 96,500 coulombs. d) the number of SO4^2- ions in 1 L of 1 N sulfuric acid. |
Number of sulfate ions in 1 L of 1 N sulfuric acid solution, is not a mole. The reason is that there are two equivalents of hydrogen in each mole of sulfuric acid. A 1 N solution contains one mole of hydrogen ions, but only half a mole of sulfate ions. 2 N of sulfuric acid means 1 mole of sulfate ions D
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Which of the following statements about molecular and empirical formula is false?
I. a given compound can have the same molecular formula and empirical formula II. the empirical formula is a whole number multiple of a molecular formula III. the H202 represents the empirical formula of hydrogen peroxide. |
II and III
Water's empirical formula is the same as the molecular formula H20 Glucose and hydrogen peroxide its CH20 HO answer is c |
