10/23/23

Use implicit differentiation
9. y' of sec²(x) + csc²(y) = 9ans. y'= tan(x) sec²(x) / cot(y) csc²(y)
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10/22/23

Calculate the solubility at 25°C of CuBr in pure water and in 0.30M NaCN .

Calculate the solubility at 25°C of CuBr in pure water and in 0.30M NaCN . You'll probably find some useful data in the ALEKS Data resource. Round your answer to 2 significant digits.Calculate the... more
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10/21/23

What's the answer?
Michael is putting 11 colored light bulbs into a string of lights. There are 3 pink light bulbs, 4 orange light bulbs, and 4 green light bulbs. How many distinct orders of light bulbs are there if... more
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10/21/23

How do you find the enthalpy for the overall reaction?
Given Fe2O3+3CO—> 2Fe+3CO2 ΔH=-23.44 kJFe3O4+CO—> 3FeO+CO2 ΔH=21.79 kJFe+CO2–>FeO+CO ΔH=-10.94 kJHow do you find the enthalpy for the overall reaction:3Fe2O3+CO—>2Fe3CO4+CO2?
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10/12/23

Need help with a Conservation of Energy and Momentum problem

A spring with a 850 N/m spring constant is compressed 20 cm between a 0.5 kg box and a 2.6 kg box. The spring and boxes are initially at rest on a frictionless floor. The spring is then allowed to... more
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10/11/23

chemistry law gas
How many grams of Ag 2 O Ag 2 ​ O Subscript 2 Baseline upper O are required to produce 1.15 L oxygen gas via decomposition at 102.3 kPa and 175°C? Use the ideal gas law to calculate moles of O₂.... more
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10/10/23

Second Order Harmonic Motion Help

A 1kg mass is attached to a spring (k=4kg.s^2) and the system is allowed to come to rest. The spring mass system is attached to come to res.t The spring mass system is attached to a machine that... more
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10/08/23

How much heat was released by the solution? & What is the enthalpy of the reaction?
Potassium nitrate, KNO3, has a molar mass of 101.1 g/mol. In a constant-pressure calorimeter, 34.1 g of KNO3 is dissolved in 279 g of water at 23.00 °C.KNO3(s)−→−−H2OK+(aq)+NO−3(aq)The temperature... more
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10/07/23

Measurements and Error. Density, Absolute Error (precision) of Volume, Relate Error of Average Volume, Absolute error if only trial 2 was performed
A professor determined the mass of 3 pennies using a balance. He suspected that some of the pennies were made of pure copper. He decided to determine the density of a penny by measuring the mass... more
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10/06/23

Based on the histogram, what is the sample size?
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10/06/23

Weak buffer solution titrated with a strong base
A 50.0 mL sample of buffer solution contains 0.120 M acetic acid and 0.150 M sodium acetate.If 5.55 mL of 0.092 M NaOH is added to this solution, identify the resulting number of moles of acetic... more
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10/06/23

Use implicit differentiation to find the derivative y' of the following: Wrote the solution of each number

6.y2e2x + xy3 - 1=0ans. y' =y2 + 2ye2x/ 2e2x + 3xy
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10/05/23

For the balanced chemical reaction 2H2 + O2 → 2H2O how many grams of water can be made by reacting 3.41 g of O2?

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10/03/23

Derivatives Question
Explain how you estimate the derivative in each of the following ways: As an average rate of change. As an instantaneous rate of change.
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09/24/23

The area of a sector of a circle with a central angle of 5𝜋/12 rad is 19 m2. Find the radius of the circle.

This exercise involves the formula for the area of a circular sector.The area of a sector of a circle with a central angle of 5𝜋/12 rad is 19 m2. Find the radius of the circle. (Round your answer... more
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09/22/23

Find the perimeter of the following points A (-4, -1), B (4, 5), C (4, -2), D (-4, -2)
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09/17/23

Finding the unit vector perpedicular to a surface
The question asks to find a unit vector perpendicular to the surface z^2+2xy=y+x^4 at point (x0,y0)=(1, 1). How should I do this?
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09/10/23

Air hockey si a game playedon a table. A puck slides freely on a cushion of air.
Air hockey si a game playedon a table. A puck slides freely on a cushion of air. opposing players strike the puck with a hand held round paddle. in one case while playing air hockey the puck comes... more
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09/10/23

A rectangular container measuring 16 Cm X 35 cm X 56 cm is filled with water. What is the mass of this volume of water in kilograms and grams

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09/10/23

Average velocity for both a & b and steps involved
A race car travels northward on a straight, level track at a constant speed travels 0.756 km in 23.0 s. The return trip over the same track is made in 28.0 s. (a) What is the average velocity of... more
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09/09/23

Help with last part of the calculus question for integration formulas and the net change theorems
My daughter is having a problem getting the last part of her calculus problem. The problem is listed as:A particle moves along a straight line and its position at time t is given by... more
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09/08/23

Model this note with the sine function, assuming that the amplitude is 1 and the phase shift is 0. Write the function in terms of x.
Sounds are how we perceive pressure waves in the air. The note F-sharp, directly below the note 'middle C', is a sound wave with an ordinary frequency* f=220 Hertz or cycles/sec. Model this note... more
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09/07/23

Can you answers these questions? Topic: Diffusion
A student placed some crystals of potassium manganate(VII) at the bottom of a beaker of distilled water. She left the contents of the beaker to stand for one hour. After one hour, the student... more
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09/04/23

Phsyics - Rotational Motion with a Pulley
Two masses (m1 = 5.0 kg and m2 = 2.8 kg) on opposite sides of pulley are released from rest, with m1 at a height of 0.76 m above the floor and m2 on the floor. The system then rotates without... more
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09/04/23

Tutors are catfishing
I messaged one tutor and asked about the services and after awhile I agree to get tutoring. Then I get redirected to some other guy who has different reviews and is charging more for the service.... more
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