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Exam (elaborations)

CHEM 101 Final Ivy Tech Questions And Answers

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  • Course
  • CHEM 101
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  • CHEM 101

Suppose a vodka martini contains 30% alcohol with the remaining portion of the drink composed of water. What is the solute in this type of martini? ~ alcohol You need to prepare 2.00 L of 0.100 M Na2CO3 solution. The best procedure is to weigh out: ~ 21.2 g Na2CO3 and add water until the f...

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  • August 8, 2024
  • 27
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • CHEM 101
  • CHEM 101
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CHEM 101 Final Ivy Tech
Questions And Answers

What is the definition of a scientific theory?


✓~ a model that explains the underlying reasons for observations and laws




What term best describes a brief statement that summarizes many past

observations and predicts new ones?


✓~ scientific law




Which of the following is an example of a scientific law?


✓~ In a chemical reaction, matter is neither created nor destroyed.




Which of the following would be considered a theory?


✓~ Helium balloons float because helium is less dense than air.




The key to success in chemistry is:

,✓~ all of the above




A plastic block has dimensions of 2.2 cm x 3.0 cm x 1.5 cm and a mass of 12.4

grams. Will the block float in water and why?


✓~ No, because the density of the block is 1.3 g/mL which is greater than the

density of water.




Given the density of Au is 19.3 g/cm3, determine the mass of gold (in grams) in

an ingot with the dimensions of 10.0 in x 4.00 in x 3.00 in.


✓~ 3.80 x 104




The distance between the two hydrogen atoms in a molecule of water is

0.000000000172 m. Express this distance in scientific notation.


✓~ 1.72 x 10-10 m




How many grams are in 1.48 x 107 μg?


✓~ 14.8




The correct decimal representation of 6.453 x 103 is:

, ✓~ 6,453




How many significant digits should be reported in the answer to the following

question?


(4.3-3.7) x 12.3=


✓~ 1




The correct scientific notation for the number 0.00050210 is:


✓~ 5.0210 x 10-4




Which measurement below represents the heaviest mass?


✓~ 1 Mg




Determine the answer to the following equation with correct number of

significant figures:


2.02+8.102-0.0297=


✓~ 10.09

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