Questions Answered

Ipferrara7:
Group Title
What is the new oxidation number for the atom that is oxidized in the following redox reaction?
Cr2O72 + 8H+ + 3SO32 2Cr3+ + 3SO42 + 4…
 updated one year ago
 18 replies
 4 Medals

Ipferrara7:
Group Title
At equilibrium, what is the hydrogenion concentration if the acid dissociation constant is 0.000 001 and the acid concentration is 0.01M?
 updated one year ago
 18 replies
 1 Medal

Ipferrara7:
Group Title
HELP!
What is the mole fraction of KCl in a 0.20 molal solution of KCl? (molar mass of KCl = 75 g; molar mass of water = 18 g)
 updated one year ago
 14 replies
 3 Medals

Ipferrara7:
Group Title
what is it asking for?? help!
Colloidal particles spread throughout a suspension.
…
 updated one year ago
 10 replies
 2 Medals

Ipferrara7:
Group Title
Reactivity?
What determines whether one metal will replace another metal from a compound in a singlereplacement reaction?
 updated one year ago
 2 replies
 1 Medal

Ipferrara7:
Group Title
SHOULD I SAY ADD WATER?? LOL
You notice that a lawn looks unhealthy and that, perhaps, the grass is dying. Undertake a scientific project t…
 updated 2 months ago
 4 replies
 2 Medals

Ipferrara7:
Group Title
HELP
Which of the following is true about oxidation reactions?
A. Oxidation reactions are the principal source of energy on Earth.
…
 updated one year ago
 3 replies
 No Medals Yet

Ipferrara7:
Group Title
is it b?
Which of the following is an oxidation reaction?
A. Co3+ → Co2+
…
 updated one year ago
 1 reply
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Ipferrara7:
Group Title
A(n) _____ reaction is a reaction in which an acid and a base react in an aqueous solution to produce a salt and water.
A. BronstedLowry…
 updated one year ago
 2 replies
 1 Medal

Ipferrara7:
Group Title
B??
What is the Lewis acid in the following reaction?
…
 updated one year ago
 2 replies
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Ipferrara7:
Group Title
is it acid?? help
A(n) _____ is a compound that produces hydroxide ions when dissolved in water.
A. buffer
…
 updated one year ago
 3 replies
 2 Medals

Ipferrara7:
Group Title
Which of the following is true about indicators?
A. They are weak acids or bases.
…
 updated one year ago
 2 replies
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Ipferrara7:
Group Title
Which of the following is true about acids?
A. Acids give foods a bitter taste.
…
 updated one year ago
 2 replies
 1 Medal

Ipferrara7:
Group Title
HELP! B is wrong.
Two opposing reactions (A + B C + D) occurring simultaneously at the same rate is an example of:
A. reversibility. …
 updated one year ago
 1 reply
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Ipferrara7:
Group Title
Help!!
In comparison with liquids and gases, solids are
A. more dense
…
 updated one year ago
 17 replies
 2 Medals

Ipferrara7:
Group Title
help please. let me attach the question!
 updated one year ago
 5 replies
 No Medals Yet

Ipferrara7:
Group Title
help! last question. let me attach the question
 updated one year ago
 23 replies
 2 Medals

Ipferrara7:
Group Title
Solve the equation. Check the solution.
let me draw the equation
 updated one year ago
 15 replies
 1 Medal

Ipferrara7:
Group Title
help please. let me attach the question.
 updated one year ago
 44 replies
 1 Medal

Ipferrara7:
Group Title
What are the values that satisfy the trigonometric equation for: 0 < q < 2?
…
 updated one year ago
 179 replies
 2 Medals

Ipferrara7:
Group Title
Graph the function in the interval from 0 to 2p:
y=4cos1/2q
 updated one year ago
 1 reply
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Ipferrara7:
Group Title
Use the graph of the sine function  shown below.
a. How many cycles occur in the graph?
b. Find the period of the graph.
…
 updated one year ago
 2 replies
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Ipferrara7:
Group Title
The equation models the height h in centimeters after t seconds of a weight attached to the end of a spring that has been stretched …
 updated one year ago
 5 replies
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Ipferrara7:
Group Title
Verify the identity
cot(theft pi/2) = tantheft
 updated one year ago
 1 reply
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Ipferrara7:
Group Title
Five weeks after the introduction of a new toy, the manufacturer found that the demand for the toy was modeled by f(x)= x^2+5x+4 / x^2+6x7 …
 updated one year ago
 1 reply
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Ipferrara7:
Group Title
Suppose you cut a small square from a square of fabric as shown in the diagram. Write an expression for the remaining shaded area. Factor t…
 updated one year ago
 14 replies
 2 Medals

Ipferrara7:
Group Title
Verify that the matrix has no inverse. Type your answer below.
[1 2 0
0 0 0
…
 updated one year ago
 6 replies
 3 Medals

Ipferrara7:
Group Title
Simplify.
 updated one year ago
 6 replies
 1 Medal

Ipferrara7:
Group Title
Graph y=log8x and its inverse.
 updated one year ago
 26 replies
 3 Medals

Ipferrara7:
Group Title
Graph the function.
y = 7(6)x+2 + 1
…
 updated one year ago
 11 replies
 3 Medals
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