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dombi chem 103 exam 1 with correct answers
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dombi chem 103 exam 1 with correct answers
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dombi chem 103 exam 1 with correctanswers
A piece of shiny metal was found pm the edge of the road. The metal was put on a
balance and had a mass of 1.325g. The volume was determined by difference when
the metal was placed into a 20.00 ml column of oil, which was displaced to 34.97ml.
- correct answers✔✔a) volume=14.97ml
b) 0.08851
possible metal density: aluminum, zinc, lead, uranium - correct answers✔✔unknown
light chocolate melts at 88.2 degrees f. What would this temperature be if reported
on both the Celsius scale and the Kelvin scale? - correct answers✔✔31.2c
304.4 k
Cysteine, C3H7NO2S is a sulfur containing amino acid often found in the active site
of protein enzymes. Given a 45.0g sample of cysteine, how many atoms of o can be
isolated?
a) write avocadros statement
b) number of moles of cysteine in 45 grams of cysteine
c) number of o atoms in 45 g cysteine - correct answers✔✔a) 1 mole
cysteine=6.022x10^23 molecules=121.156g
b) 0.371
c) 4.47x10^23
each gold buffalo coin weighs 1.00 oz and has face =value of $50. The price of gold
is $41.65 per gram. How much would it cost to buy 15 gold buffalo coins? 1g=0.035
oz - correct answers✔✔17,850
At its closest approach to each, the planet mars in 33.9 million miles away. What is
the correct way to express that in scientific notation? - correct
answers✔✔3.39x10^7 miles away
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