06/10/23

Calculate the standard enthalpy change
calculate the standard enthalpy change for 2LiOH(s) + CO2 (g) -> Li2CO3(s) + H2O (g)
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06/09/23

should a polar or nonpolar solvent be used to dissolve solid NH4OH? Why?
I tried drawing the lewis structures of NH4 and OH. Does Nh4 have an expanded octet and if it does what will the drawing look like? Would it be polar ( one extra electron) or non polar (... more
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06/02/23

A solid metal sphere of radius 2.50 m carries a total charge of -2.20 μC...
A solid metal sphere of radius 2.50 m carries a total charge of -2.20 μC. (a)What is the magnitude of the electric field at a distance from the sphere's center of 2.60 mm ? (b)What is the magnitude... more
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06/01/23

physics Homework question
Question: The edges of a shoebox are measured to be 12.3 cm, 18.8 cm, and 29 cm. V= 12.3 x18.8x 29= 6705.96 cm***Determine the volume of the box retaining the proper number of significant figures... more
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06/01/23

Speed of the stun gun projectile compared to a 90mph fastball. Same nearly flat trajectory…
How fast projectile from stun gun?…compared to 90mph fastball
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05/25/23

Integration by substitution
What u expression can be used to complete the following integrals by substitution? (i.e. u = ?)integral of x^2*(e^x)^3
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05/21/23

Confusing function problem

Let ƒ(x) be defined for all x > 0 such that 11ƒ(x+1) + 5f((1/x)+1) = log xFind the value of ƒ(6) + ƒ(17) + ƒ(126)
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05/13/23

Electric field physic 2 please show all the steps
The electric field between the plates of a paper-separated (K=3.75) capacitor is 8.21×104 V/m . The plates are 1.75 mm apart, and the charge on each plate is 0.690 μC .Determine the area of... more
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05/13/23

K2SO4(aq) + FeCl3(aq) =
Complete the balanced molecular chemical equation for the reaction below. If no reaction occurs, write NR after the reaction arrow. Be sure to include the proper phases for all species within the... more
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05/07/23

Find the net rate of radiation 𝐻net by a pot at 34.9 ∘C that has been placed in a −19.5 ∘C freezer. The pot's surface area is 0.107 m2 and its emissivity is 0.569.
Find the net rate of radiation 𝐻net by a pot at 34.9 ∘C that has been placed in a −19.5 ∘C freezer. The pot's surface area is 0.107 m2 and its emissivity is 0.569.
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05/07/23

whats the difference between the projection of a vector on another vector and vector along direction of another vector?
thankyou
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05/07/23

A cable that weighs 2 lb/ft is used to lift 800 lb of coal up a mine shaft 500 ft deep. Find the total work done.
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05/05/23

Nernst Equation
What is the value of n in the Nernst equation for the reaction Al(s) + 3 Ag⁺(aq) ⟶ 3 Ag(s) + Al³⁺(aq).
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05/04/23

What is the energy of the air resistance exerted on his parachute?
A parachuter jumped from the top of a building 850 m high with a velocity of 5 m/s. He landed with a velocity pf 2 m/s. What is the energy of the air resistance exerted on his parachute?
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05/04/23

using trig substitution evaluate the integral [x^3*square root(100+x^2)]dx
[x^3•√(100+x^2)]dx
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05/01/23

37–43 The region bounded by the given
37–43 The region bounded by the given curves is rotated about the specified axis. Find the volume of the resulting solid by any method. 43.x=(y-1)^2,x-y=1 about x=-1
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04/16/23

A 21.0-liter gas cylinder contains 7.6 moles of nitrogen gas and 3.4 moles of oxygen gas. If the temperature of inside the cylinder is 0 °C, what is the total pressure inside the cylinder?
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04/16/23

angular velocity
The hammer throwers arm is 0.8m long and the hammer extends an additional 1.2m. It takes 0.75 seconds to complete 1 revolution (angular displacement of 6.28 rad) before the thrower releases the... more
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04/16/23

A 7.50 cm pencil is placed upright at a distance 53.0 cm away from the center of a convex mirror. The mirror's radius of curvature is 45.0 cm.
a) Calculate the image distanceb) What is the magnification?
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04/14/23

100 g of ice at -5.0 C is added to 30 g of steam at 100 C. Find the final temperature of the resulting water.

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04/14/23

How do I solve this?
A V-6 internal combustion engine burns fuel at the rate of 4.3 gallons per hour. The fuel has a heating value of 54.6 kJ/mL. Calculate the useful output power (in kilowatts) to the power train... more
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04/13/23

Rotation physics

A student sits on a freely rotating stool holding two weights, each of mass 3.09 kg. When his arms are extended horizontally, the weights are 1.08 m from the axis of rotation and he rotates with an... more
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04/13/23

Calculate and determine.
Nitogen dioxide, NO2​, is a red-brown gas that is considered an air pollutant. When heated, nitogen dioxide gas decomposes into nitrogen monoxide and oxygen gas, according to the following... more
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04/07/23

Calculate the standard potential for this cell at 25 °C.
A galvanic (voltaic) cell consists of an electrode composed of magnesium in a 1.0 M magnesium ion solution and another electrode composed of copper in a 1.0 M copper(II) ion solution, connected by... more
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04/06/23

In Spring 1975, I scored 660 Verbal. What's my percentile?
At St Viator High School in Arlington Heights Illinois. I was born February 18 1959 at Chicago Masonic Hospital in Chicago Illinois. I was a very geeky fat unathletic but musical nerd and an... more
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