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ChemistryChemistry
Antoine
If a reaction has an equilibrium constant just greater than 1, what type of reaction is it?
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ChemistryChemistry
Toni
What will happen if the concentration of water inside a cell is higher than the concentration of water outside a cell?
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ChemistryChemistry
Bullock
The balanced chemical equation for the combustion of propane is

C3H8 (g) + 5O2 (g) →3CO2 (g) + 4H2O (g)

C3 H 8 (g) + 5O2 (g) → 3CO2 (g) + 4H2O (g)

Which statement is correct about the complete combustion of 3.00 mole of propane, C3H8?

a. 12.00 mol H2O are produced.

b. 3.00 g CO2 are produced.

c. 3.00 mol CO2 are produced.

d. 12.00 g H2O are produced.
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ChemistryChemistry
Tobias Mejia
Selena is growing geraniums outdoors in a pot. During the day, the temperature in her

area averages 22°C (72°F). At night, the temperature has been dropping to around 13°C

(55°F). What advice would you give to Selena and why?
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ChemistryChemistry
Casey Waller
How many carbons are in a molecule of hexane?
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ChemistryChemistry
Andres Flores
How does th composition of a mixture of hydrogen and oxygen differ from the composition of a compound containing hydrogen and oxygen?
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ChemistryChemistry
Mateo
You are asked to prepare 500 mL 0.250 M acetate buffer at pH 5.00 using only pure acetic acid (MW=60.05 g/mol, pKa=4.76), 3.00 M NaOH, and water. Answer the questions regarding the preparation of the buffer.

1. How many grams of acetic acid will be needed to prepare the 500 mL buffer?

Note that the given concentration of acetate refers to the concentration of all acetate species in solution.
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ChemistryChemistry
Muhammad Neal
Which direction do electrons move in when metals react with non-metals?
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ChemistryChemistry
Saige Mack
Hen an electric current passes through liquid water, hydrogen gas passes accumulates at one electrode and oxygen accumulates at the other. Which of the following is true?

A) A physical change has occurred, with energy is being absorbed.

B) A chemical change has occurred, with energy being given off.

C) A physical change has occurred, with energy being given off.

D) A chemical change has occurred, with energy being absorbed.
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ChemistryChemistry
Boyer
Explain what happens to water when heat energy is absorbed

a. Ice melts

b. Liquid water freezes

c. Water vapor condenses
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ChemistryChemistry
Joanna Roy
Will fluorine form an anion or a cation? Why?
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ChemistryChemistry
Koen Mahoney
An atom of argon in the ground state tends not to bond with an atom of a different element because the argon atom has 1). More protons than neutrons 2). More neutrons than protons. 3) a total of 2 valence electrons. 4). A total of 8? valence electrons
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Simone Meyer
When bases dissolve in water they release what type of negative ion?
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ChemistryChemistry
Lang
An acid is added to water, and a new equilibrium is established. What is the system after the acid is added?
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ChemistryChemistry
Isabelle Ferguson
The hydrogen spectrum has a red line at 656 nm, and a blue line at 434 nm. What is the first order angular separation between the two spectral lines obtained with a diffraction grating with 5000 rulings/cm?

A. 7.7 degrees

B. 16.6 degrees

C. 6.6 degrees

D. 3.2 degrees

E. 19.2 degrees
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