236 Answered Questions for the topic College
College Chemistry
05/04/20
Chemistry Help please
What is the mass number of Vanadium with 30 neutrons?
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04/30/20
Should I Drop Out of High School and Get My GED Instead?
I am a 17 year old junior in high school. For most of the first semester of this academic school year, I decided to take online classes due to recovery of personal matters. I found out during that...
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College Chemistry
04/22/20
chemistry help please
Phosphoric acid is an example for _______ acid.
A) monoprotic
B) diprotic
C) triprotic
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College Chemistry
04/22/20
chemistry help please
Which compound acts as both acid and base?
A) HNO3
B) H2O
C) HCl
D) H3PO4
E) H2S
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College Chemistry
04/22/20
Chemistry help please
For the given reaction, identify the conjugate pair for water: NH3 + H2O ------ NH4+ + OH-
A) ammonia
B) ammonium ion
C) hydroxide ion
D) hydronium ion
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College Chemistry
04/22/20
Chemistry help please
If pH of orange is 3.5, calculate the corresponding pOH.
A.
0.54
B.
2.9 * 10^ -15
C.
10.5
D.
11.5
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College Chemistry
04/22/20
Chemistry Help please
Which of the following is NOT a base?
A) bile salts
B) NaOH
C) vinegar
D) soap
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College Chemistry
04/22/20
Chemistry help please
NH4OH is a base because it has _________ ions.
A) hydrogen
B) hydronium
C) hydroxide
D) hydride
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College Chemistry
04/22/20
Chemistry help please
In a sulfuric acid solution, where [ H3O+] is 0.01 M, what is the pH value?
A) pH = 12.0
B) pH = 2.0
C) pH = 3.0
D) pH = 11.0
E) pH = 5.0
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College Chemistry
04/21/20
college chemistry
H2PO4- + H2O --> H3PO4 + OH-the acid is the base is the conjugate acid is the conjugate base is
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College Chemistry
04/21/20
College chemistry
What is the equation for expressing pH? pOH?
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College Chemistry
04/21/20
College Chemistry
What is the pH of 0.75 M hydrochloric acid solution?
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Equation of Hyperbola — Help!!
Hi! please help me!Question:A light on a wall produces a shadow in the shape of a hyperbola. If the distance between the two vertices of the hyperbola is 10 inches and the distance between the two...
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04/14/20
Series & Minimum/Maximum
Let Vr = (Ur+1)^2 - (Ur)^2 , where Ur+1 & Ur denote the r+1th and rth term of a sequence where Ur>0It is given that Sigma(from r=1 to n) Vr = [ (n-2)((2n-3)]/ (n^2 + 1) , where n>= 1 and...
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College Chemistry
04/13/20
Chemistry help please
What is the molarity of a solution that contains 5 moles of NaNO3 in 550. mL of solution?
A) 0.01 M
B) 9.1 M
C) 2.75 M
D) 13.0 M
E) 2750 M
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College Chemistry
04/13/20
Chemistry Help Please
A tank contains a mixture of H2, N2 and O2 gases. If the total pressure in the tank is 586 kPa and the partial pressures of H2 and O2 are 215 mmHg and 2 atm, respectively, what is the partial...
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04/10/20
College algebra Compound Question
My math teacher only showed us how to do this problem with a ti 85 graphing calculator. thats great and all but i don't own that kind of calculator so how do i go about this question with working...
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College Chemistry
04/06/20
Chemistry solution
What mass, in grams, of sodium sulfate (Na2SO4) is needed to make 275 g of a 1.5% (m/m) aqueous solution of sodium sulfate?
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A particle is moving with the given data. Find position of the particles
A particle is moving with the given data. Find position of the particlesa(t) = 13sin(t)+7cos(t), s(0) = 0, s(2pi) = 10i got s(t) = -13sin(t) -7cos(t)+5pi+7 but it was wrongthabk you for help
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04/02/20
Functions with Asymptotes and their applications
For the function f(x)=2-x calculate the following function values:f(1) =f(2) =
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04/01/20
College Algebra Linear functions Help Please
A farmer is going to divide her 60 acre farm between two crops. Seed for crop A costs $25 per acre. Seed for crop B costs $50 per acre. The farmer can spend at most $2750 on seed. If crop B brings...
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College Chemistry
03/31/20
College Chemistry
An airtight container with a volume of 4.25 x 104 L, an internal pressure of 1.00 atm, and an internal temperature of 15.00 C is washed off the deck of a ship and sinks to a depth where...
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College Chemistry
03/31/20
College chemistry Question
How many moles of gas does it take to occupy 120 liters at a pressure of2.3 atmospheres and a temperature of 340 K?How do i work out this problem?
College Chemistry Pv=nRT
What is the pressure in atm exerted by 2.48 moles of a gas in a 250.0 mL container at 58 C?I'm so lost with this problem. can someone give me a step by step to getting the answeri always get lost...
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03/28/20
Statistics question: Probability (College level)
The percentage of people who buy lottery ticket at least once a year is 92% on average. If 6 people are randomly selected, what is the probability that at least 5 of them buy a lottery ticket at...
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