Question
In: Chemistry
Give an example out of your kitchen of the following: Explain how your choice falls into...
Give an example out of your kitchen of the following: Explain how your choice falls into this category, and if there is a chemical name or symbol for it, please provide that as well.
a) a compound
b) a heterogeneous mixture
c) an element (symbol)
Moving to the Caves… Lechuguilla Caves specifically.
Check out this picture of crystals of gypsum left behind in Lechuguilla Cave. https://upload.wikimedia.org/wikipedia/commons/c/c1/Lechuguilla_Chandelier_Ballroom.jpg
2) Describe three physical properties of these crystals, explain how each may be measured
Describe a process that would cause a physical change to these crystals and explain how this describes a physical change. How would you cause it?
Research and find what the density of gypsum is. Using the density you find, and a given mass of 1.101 g, calculate the volume (in cm3) of the gypsum crystal shown below. Show all work.
Suppose you had a gypsum crystal with a mass of 25.320 g & volume was 10.96 ml. Put both of these numbers into scientific notation and indicate how many significant figures are in each number.
Calculate the density of the crystal sample using the mass of 25.320 g & volume of 10.96 ml, report your answer to the correct number of significant figures. Explain how you determined the number of significant digits to report in this calculation.
Suppose your crystal's density is 2.312 g/cm3. Use conversion factors to convert this to mg/ml
Show all your work and all your units throughout.
Solutions
Expert Solution
Answers:
a) a compound
Common Salt, NaCl (An Inorganic Compound)
b) a heterogeneous mixture
Tea Leaves in water
c) an element (symbol)
Aluminum (Al)
Moving to the Caves… Lechuguilla Caves specifically.
Check out this picture of crystals of gypsum left behind in Lechuguilla Cave. https://upload.wikimedia.org/wikipedia/commons/c/c1/Lechuguilla_Chandelier_Ballroom.jpg
2) Describe three physical properties of these crystals, explain how each may be measured
(I) Soluble in water
(II) Lose water and become powder up on heating producing paris .
(III) White in color
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