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lara31 [8.8K]
2 years ago
8

29. Spongebob loves to garden and wants to grow lots of pink flowers for his pal Sandy. He bought a special Flower Power fertili

zer to see if it will help his plants produce more flowers. He plants three plants of the same size in separate containers with he same amount and type of potting soil. He places one plant in a sunny window and waters it every day with fertilized water. He places the second plant in a more shady window and waters it every other day with fertilized water. He places the third plant in a dark closet and waters it every day with plain water. What did Spongebob do wrong in this experiment?
he has too many independent variables
he has no controlled variables
he has no control group
he has too many dependent variables
Chemistry
1 answer:
iVinArrow [24]2 years ago
5 0
A) he has too many independent variables

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At 1173 K, Keq = 0.0108 for the following reaction: CaCO3(s) ⇄ CaO(s) + CO2(g) The reaction takes place in a 10.0 L vessel at 11
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Answer:

The amount of calcium carbonate will increase.

Explanation:

K is the constant of a certain reaction when it is in equilibrium, while Q is the quotient of activities of products and reactants at any stage other than equilibrium of a reaction.

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CaCO_3(s)\rightleftharpoons CaO(s) + CO_2(g)

Equilibrium constant of the reaction = K_{eq}=0.0108

Concentration of CaO=\frac{15.0 g}{56 g/mol\times 10.0L}=0.027 M

Concentration of CO_2=\frac{4.25 g}{44 g/mol\times 10.0L}=0.0096 M

Concentration of CaCO_3=\frac{15.0 g}{100 g/mol\times 10.0L}=0.015 M

Q=\frac{[CaO][CO_2]}{[CaCO_3]}

=\frac{0.027 mol/L\times 0.0096 mol/L}{0.015 mol/L}=0.0174

K_{eq}

This means that equilibrium will move in backward direction by which amount of calcium carbonate will increase.

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