01/31/22

Point charges HELP PLEASE
Two point charges lie on the x axis. A charge of 6.5 uC is at the origin, and a charge of -9.5 uC is at x=10 cm. a. What is the net electric field at x= -4.0 cm?b. What is the net electric field at... more
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01/31/22

If 8.52g are actually formed, what is percentage yield of NH3? N2 + 3H2 = 2NH3
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01/31/22

can anyone please help me with this question? i already try for part a but i dont have any idea for part b..i need to submit the answer before wednesday.. thank you in advance

2. An object of mass 5 kg travels in a straight line at 4 ms-1. It collides with an object of mass    7 kg traveling in the same direction at 2 ms-1. Calculate thea)   Total momentum... more
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01/31/22

Does gravitational acceleration affect an object standing on the ground, or moving in a vehicle or when a person in standing on top of a building??
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01/31/22

Probablity: A pinochle deck consists of 48 card, 2 of each of the 9 through the ace in 4 suits. If 2 cards are drawn at random, what is the probability that both will be black or both will be kings?
Schoolwork, I can't figure this out, but I'd like to know how I could solve it
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01/30/22

 A positively charged particle Q1 = +35 nC is held at fixed position
 A positively charged particle Q1 = +35 nC is held at fixed position. A second charge Q2 of mass m = 3.5 μg is located a distance d = 25 cm directly above charge Q1. The net force on Q2 is equal to... more
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01/30/22

What is the solubility of PbF₂ in a solution that contains 0.0550 M F⁻ ions? (Ksp of PbF₂ is 3.60 × 10⁻⁸)
What is the solubility of PbF₂ in a solution that contains 0.0550 M F⁻ ions? (Ksp of PbF₂ is 3.60 × 10⁻⁸)
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01/30/22

2CO 2(g) ↔ 2CO (g) + O 2(g)

0.30 mol of CO 2 is placed in 2.3L reaction vessel and is heated to 2500 ̊C. What would you expect the equilibrium concentration of each entity to be if K for the above reaction is 8.30 x 10 -7 at... more
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01/30/22

Step by step process of the problem.
A patient is to receive an intravenous injection of medication. In order to work properly, the pressure of fluid containing the medication must be 109 kPa at the injection point. If the fluid has a... more
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01/30/22

As the work done by the Sun on Earth is 0, so is this the reason for earth not falling into the sun?
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01/30/22

Find the area of the surface generated by revolving the given curve about the x-axis . Y=√x,0 ≤x≤2
I am having trouble using the u substitution to solve the problem. First, I used the s=integral 2pi√1+(dx/dy)^2 dx formula but got stuck on the u substitution section.
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01/29/22

CO (g) + Cl 2(g) ↔ COCl 2(g) K = 8.2 x 10^-2 at 626 ̊C
If 2.5 mol of carbonyl chloride gas, COCl 2 is initially introduced into a 10.0 L reaction vessel at 626 ̊C, calculate the equilibrium concentrations of carbon monoxide and chlorine.
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01/29/22

Consider these changes. (In notes) At constant pressure, in which of the reactions is work done by the system on the surroundings? By the surroundings on the system? In which of them is no work done?
(a) Hg(l) --> Hg(g) (b) 3O2(g) --> 2O3(g) (c) CuSO4 · 5H2O(s) --> CuSO4(s) + 5H2O(g) (d) H2(g) + F2(g) --> 2HF(g)
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01/27/22

Given the following unbalanced equation, calculate the liters of water produced in this combustion reaction if you react 1 mole of CasH3o with enough oxygen. The density of water is 1.0g / mL.
Given the following unbalanced equation, calculate the liters of waterproduced in this combustion reaction if you react 1 mole of CasH3o withenough oxygen. The density of water is 1.0g / mL. ... more
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01/27/22

organic chemistry
Hg + H2 → 2H + Hg k1 H + C2H4 → C2H5 k2 C2H5 + H2 → C2H6 + H k3 H + H → H2 k4 Assuming that the intermediates H and C2H5 attain a steady state, determine the rate of... more
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01/27/22

how are moles solely related to atoms, molecules and particles of elements and compounds?
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01/26/22

A 47 kg person walking 5.4 km/hr requires 838 kJ of energy per hour.

A 47 kg person walking 5.4 km/hr requires 838 kJ of energy per hour. How much further does he have to walk to consume the additional energy contained in 300 g of ground beef relative to 300 g of... more
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01/26/22

an object moves in simple harmonic motion with period 8 seconds and amplitude 5 cm. at time t=0 seconds, it's displacement d from rest is 0 cm , initially it moves in a negative direction
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01/25/22

Physics 2. I'd really appreciate any help.
Three blocks move on a surface with μs = 0.6 and μk = 0.4 as shown below. Jennifer, anotherhonor chemistry student, applied 34 N of force to move the system of three blocks, but shefailed. Assume... more
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01/25/22

Grade 11 Physics

An egg was dropped in a container and we need to find the force of air resistance acting on it.Mass is 0.259kg distance is 4.57mtime is 0.890s
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01/24/22

Find the volume V of a regular tetrahedron whose face is an equilateral triangle of side s. The tetrahedron has height h = squareroot(2/3)*s
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01/24/22

A 79.0 kg person uses 248 kJ of energy to walk 1.00 km
A 79.0 kg person uses 248 kJ of energy to walk 1.00 km. This energy comes from “burning” glucose (Burning 1.00 g of glucose produces 15.7 kJ of heat.), but only about 30.0% of the heat of... more
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01/24/22

How to find the area of the region bounded by the graphs y = x^3 + 2x^2 and the line y=x+1
1) Define the intersection points. (Show how you get the points).2) Shaded the region bounded.3) Evaluate the area (show the calculations).
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01/24/22

The height of a falling object (subject to air resistance) is given by h(t) = 400 − 39t − 157e−t/4
The height of a falling object (subject to air resistance) is given byh(t) = 400 − 39t − 157e−t/4with h in meters and t in seconds. Write a formula for the average velocity on the interval[2, a].... more
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01/23/22

I need help with this
1.) What is the mechanical advantage of an inclined plane if its runs is 7.8 m and its rise is 3.0 m?2.) What force is would be required to roll a barrel weighing 300 newtons up the inclined plane... more
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