07/24/25

Find the perimeter and surface area
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07/23/25

How do you predict products for reactions with acid and base reactants (beyond neutralization reactions), and how do acid base reactions relate to redox reactions?
I'm so sorry--this is such a vague and annoying question. Essentially, as I saw more and more reactions in chemistry, all of the reactions with acids and bases and anhydride acids and bases and... more
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05/23/25

find surface area of composite shapes
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03/16/25

General Chemistry 2
The pH of an aqueous solution of 0.248 M sodiumcyanide, NaCN, is (answer). (Assume that Ka (HCN) = 4.00 x 10^-10).This solution is _____ (acidic, neutral, basic).
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03/09/25

Can somebody please help me with these physics questions?

1.) A bug from South America known as Rhodnius prolixus extracts the blood of animals. Suppose Rhodnius prolixus extracts 0.300 cm3 of blood in 25.0 min from a human arm through its feeding tube of... more
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02/19/25

Could somebody please help me with this physics question?

  The pulse travels to the right on a string whose ends at x = 0 and x = 4.60 m are both fixed in place. Imagine a reflected pulse that begins to move onto the string at an endpoint at the same... more
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06/08/24

If a mine pony had to perform a task where they had to lift a bucket of ore 20 m from the bottom of
If a mine pony had to perform a task where they had to lift abucket of ore 20 m from the bottom of the shaft to the top of the shaft, what would thereduction in force be if a ramp was used that is... more
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06/07/24

What is the refractive index of a solution that has a critical angle of 40.8° with respect to air? The refracting index of air is 1.00.
Options: A. 1.17  B. 1.25 C. 1.53 D. 1.65Please explain in detail the step-by-step process. Thank you.
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05/20/24

teresa invested $7600 in two different accounts. the first account paid 6% the second account paid 2% interest. At the end of the first year she had $360 in interest. How much was in each account?
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05/20/24

This question concerns stoichiometry.

Salicylic acid, C7H6O3, is reacted with acetic anhydride, C4H6O3, to produce aspirin, C9H8O4, and acetic acid in this reaction:C7H6O3(s) + C4H6O3(l) yields C9H8O4(s) + CH3COOH(l). If 125.0 mol... more
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05/13/24

Can a tutor teach a child in Singapore?
We live in Singapore . But your form does not allow us to put a zip code outside USA. We are US citizens. But my child goes to an American school in Singapore. please let me know how can request a... more
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05/12/24

My question concerns the stoichiometry of gases.
Solid aluminum reacts with an aqueous solution of HCl to produce an aqueous solution of AlCl3 and hydrogen gas. If 110.0 g HCl are in the solution and 25.00 g Al are added, determine the... more
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05/11/24

fluids buoyant force ap physics 2 question!!! help
2) The students were discussing future lab work after completing a lab to determine the density of an irregularly shaped object using spring elongation. Student A said they could try submerging the... more
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05/08/24

Gas Pressure and PV diagram
A gas undergoes two processes. In the first the volume remains constant at 0.3m3 and the pressure decreases from 5.00 × 105 Pa to 1.00 × 105 Pa. The second process is an expansion to a volume of... more
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04/17/24

Find the amount of work (in Joules) required to empty the trough by pumping the water over the top.
A trough is 2 meters long, 3 meters wide, and 3 meters deep. The vertical cross-section of the trough parallel to an end is shaped like an isosceles triangle (with height 3 meters, and base, on... more
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04/16/24

Need help with Euler's method
Use Euler's method with step size 0.5 to compute the approximate y=values y1,y2,y3, and y4 of the solution of the initial-value problem y'=y-2x, y(1)=0
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04/16/24

21. Answer in units of W/m · °C.
A box with a total surface area of 1.66 m^2 and a wall thickness of 6.23 cm is made of an insulating material. A 11 W electric heater inside the box maintains the inside temperature at 22.3 °C... more
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04/16/24

Phyisics Primary Power Supply

An ideal transformer has 50 turns in its primary and 400 turns in its secondary. 14-VV ac is connected to the primary. What is the power supplied to the primary? Not sure how to do this problem.
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03/28/24

Can you explain (in short) how S + P = 2SP, S + 2P = 3SP2 and S + 3P = 4SP3
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03/28/24

Find the future value, using the future value formula and a calculator. (Round your answer to the nearest cent.) $45.67 at 5.5% compounded daily for 3 years
Find the future value, using the future value formula and a calculator. (Round your answer to the nearest cent.)$45.67 at 5.5% compounded daily for 3 years
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03/08/24

derivative and antiderivative of ln(2x)
Alright, if I were to find dy/dx of ln(2x) I'd get 1/2x.2, so 2/2x and that can be simplified as 1/x.However, if I were to integrate 1/x to attempt to infer my original function, I'd get ln(x) +... more
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03/08/24

The Ka of a monoprotic weak acid is 0.00361. what is the precent ionization of a 0.155 M solution of this acid

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03/08/24

Using the ideal equation of state
A chemical engineer must calculate the maximum safe operating temperature of a high-pressure gas reaction vessel. The vessel is a stainless-steel cylinder that measures 12.0cm wide and 14.4cm high.... more
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03/08/24

Using relative effusion rates to find an unknown molar mass
A gas made up of atoms escapes through a pinhole 0.839 times as fast as N2 gas. Write the chemical formula of the gas.
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03/08/24

max and min help?
Within the interval (-0.93,4.77), for what value of x does f(x) take on a minimum iff(x)=3.2sin(1.1x)+5.3cos(1.1x)Minimum value of f(x) occurs at x=What is the value of f(x) at this value of x... more
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