06/29/22

Help me solve this problem??
You have prepared a solution by dissolving 232.29mg of copper(II) nitrate pentahydrate in 1.45kg of water. What is this solution's Cu+2 concentration in parts per million, ppm? (show steps)
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06/28/22

On average your refrigerator is on the cooling feature for a total of 9 hours per day and it takes 725 watts to run it . The total cost of running your refrigerator for one day is $0.45

Use the equation c= t x r x w/1000 to find the rate rewrite the equation to solve for r r =what are c,t and w c= $t= Hours w= watts.
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06/28/22

How many ATOMS of carbon are present in 1.59 moles of carbon monoxide? How many MOLES of oxygen are present in 9.31×1022 molecules of carbon monoxide?
How many ATOMS of carbon are present in 1.59 moles of carbon monoxide? ______ atoms of carbon. How many MOLES of oxygen are present in 9.31×1022 molecules of carbon monoxide? _____ moles... more
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06/28/22

Can I get help with this.
Calculate the vapor pressure of octane  (b.p. 126.0 ∘C126.0⁢ ∘C) at the gas chromatography column temperature of 83.0 ∘C83.0⁢ ∘C using the form of the Clausius–Clapeyron equation shown... more
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06/28/22

Mathematics question
Daud want to paint some faces of a cube with green paint. At least one face must be painted. How many ways are there for him to paint the cube? Note: Two colorings are considered the same if one... more
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06/28/22

A car is waiting at a stoplight. The car has a mass of 1200 kg. What is the force (magnitude and direction) that the road puts on the wheels?

2) The same car accelerates out of the stoplight at 1.5 m/s2. find the force of friction (magnitude and direction) that the road puts on the wheels.
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06/28/22

Separable Differential Equations
A 55 "-gallon" tank is filled with brine (water nearly saturated with salt; used as a preservative) holding 12 ⁢ lb of salt in solution. A salt solution containing 0.4lb of salt per gallon is added... more
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06/27/22

Help me solve this
The enthalpy of fusion for ethane (C2H6) is 2.85kJ/mol. How much heat is required to melt 36.33g of solid ethane at its melting point? Report your answer in units of kJ. (Show your steps).
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06/26/22

A serving of soup contains 2.0 g of fat, 13.0 g of carbohydrates, and 2.0 g of protein. Determine how many kilocalories (kcal) are contained in this serving.
number of kilocalories:question 2.) Type of biomolecule Representative foods Calorie content (Cal/g) Calorie Content and Examples of Carbohydrates, Proteins and Fats... more
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06/26/22

reaction product of chemical equation
Consider the reaction: 2 Al + 3Br2 → 2 AlBr3Suppose a reaction vessel initially contains 5.0 mole Al and 6.0 mole Br2. What is in the reaction vessel once the reaction has occurred to the fullest... more
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06/26/22

In a large population, 53% of the people have been vaccinated. If 3people at random are selected, what is the probability that at least one of them has been vaccinated If

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06/26/22

If 0.123 L of h2o2 are completely decomposed, how many moles of oxygen gas will be produced? The density of hydrogen peroxide is 1.45 g/ml
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06/26/22

Water is leaking out of the bottom of an inverted conical tank at the rate of 1/10 m^3/min, and at the same time is being pumped in the top at a constant rate of k m^3/min.
Water is leaking out of the bottom of an inverted conical tank at the rate of 1/10 m^3/min, and at the same time is being pumped in the top at a constant rate of k m^3/min. The tank has a height of... more
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06/26/22

Normal and Tangential Components
Find the tangential and normal components of the acceleration vector for the curve →r(t)= ⟨4t,3t^2,4t^4⟩ at the point t=2Answer format: a(2) = (Decimal #) T + (Decimal #) N(Give your answer to... more
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06/25/22

a car drives at a constant speed of 23 m/s it is subject to a drag force of 500 N what power output is required from the car's engine to drive the car on level ground
a car drives at a constant speed of 23 m/s it is subject to a drag force of 500 N, what power output is required from the car's engine to drive the car on level ground?
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06/25/22

Polar area help
Find the area that it encloses.(a) r = 1 − sin 𝜃Find the area that it encloses.(b) r = 7 + 2 cos 𝜃
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06/24/22

Find the area of the region that lies inside the first curve and outside the second curve.
r = 14 cos 𝜃,    r = 7
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06/24/22

How long will the catalyzed reaction take?
The activation energy for a reaction is changed from 169 kJ/mol to 62.1 kJ/mol at 605 K by the introduction of a catalyst. If the uncatalyzed reaction takes about 2870 years to occur, about how... more
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06/24/22

If f(×)=5×-3 which expression represents its inverse

If f(×)=5×-3 which expression represents its inverse
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06/24/22

Revenue function, profit function, and drawing a signs diagram.
This is the question:Suppose the demand price for selling for selling out a production run of x DVDs is given by p(x) = -0.0005x2 +60 dollars per DVDFurther suppose the weekly cost oof producing... more
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06/24/22

Acid Base Titration Question
Why must I consider the amount (volume) of the titrant added to determine the pH at any given point along a titration?
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06/24/22

Light Relationship

What is the energy of 2.24 x 10–3 moles of 2.13 nm X-ray photons? in kj *two experts have got this wrong its tricky
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06/24/22

Arc Length Calculus III
For the curve defined by→r(t)=5cos(t)→i+5sin(t)→j+2t→kevaluates=∫(upper limit =t and lower limit =0) ||→r'(u)||duI found the arc length function which was rad 29 t I also found the arc length... more
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06/23/22

Word Problem Please need help with this asap
Consider the following equations, where 𝑞 denotes quantity in thousands and 𝑝 denotes price in dollars:0.6𝑞 − 𝑝 − 20 = 0 60𝑝 + 𝑞 − 940 = 0 Express 𝑝 as a function of 𝑞 in each of the above... more
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06/23/22

probability of m&ms
According to Masterfoods, the company that manufactures M&M’s, 12% of peanut M&M’s are brown, 15% are yellow, 12% are red, 23% are blue, 23% are orange and 15% are green. (Round your... more
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