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asked by @jeremyb10 • about 19 hours ago • Chemistry • 5 pts

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Popular Chemistry Practice Problems

Titanium metal, density of 4.54 g/cm3, is used to make golf clubs. A rectangular bar of titanium which weighs 45.7 g measures 1.84 cm in length and 2.24 cm in width. What is the height of the bar?

A) 50.3 cm

B) 2.44 cm

C) 252 cm

D) 12.3 cm

E) 4.09 cm

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A known amount of gaseous ammonia and gaseous oxygen were mixed in a closed container according to the following reaction:

   4NH3 (g) + 5O2 (g) → 4NO (g) + 6H2(g)

It was experimentally determined that oxygen was the limiting reagent and was completely used up during the course of the reaction. If you started the process with 45.37 grams of ammonia (NH3) and you have 19.27 grams of ammonia left over at the end of the reaction, how much gaseous oxygen was actually consumed during the experiment?

A) 34.50 g

B) 61.27 g

C) 45.23 g

D) 106.5 g

E) 39.21 g

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Which of the following statement(s) is/are correct:

   i. The correct name for Ga(NO3)3 ia gallium (III) nitrate

   ii. The correct name for Co(CrO4)3 is cobalt (VI) chromate

   iii. The correct name for AlCl3 is aluminum trichloride

A) i only

B) ii only

C) iii only

D) i and ii

E) i and iii

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Which of the following statement(s) is/are correct:

   i. The correct formula for carbonic acid is HCO 3-

   ii. The correct name for HBrOis perbromic acid

   iii. The correct formula for hydrosulfuric acid is H2SO4

A) i only

B) ii only

C) iii only

D) i and ii

E) i and iii

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A compound containing only carbon, hydrogen, and nitrogen is analyzed and found to contain 54.48% carbon and 13.74% hydrogen. What is the correct empirical formula for the compound?

A) C4H12N2

B) C2H8N

C) C2H7N2

D) C2H6N

E) C3H12N2

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