06/02/24

Conservation of Energy
In order for Jane to return to base camp, she needs to swing across a river of width D that is filled with alligators. She must swing into a wind exerting constant horizontal force F, on a vine... more
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02/20/24

Pressure at Equilibrium
For the reaction 2 SO₃(g) ⇌ 2 SO₂(g) + O₂(g) Kp = 2.62 × 10⁻⁶ at 400 °C. A 1.50 L vessel at 400 °C is filled with SO₃(g) at an initial pressure of 4.75 atm and allowed to come to equilibrium. What... more
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07/31/23

Concentration using activity coefficients
Find the concentration of I− in 0.010 M AgNO3 saturated with AgI. Include activity coefficients in the solubility-product expression. The 𝐾sp of AgI is 8.3×10^−17what is the concentration of I?
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07/15/23

newton's law of motion
A person is sliding a 12.0 kg block across ice that has a coefficient of kinetic friction of 0.100. How much force does the person need to apply to keep the block moving at a constant rate?
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10/11/22

At what speed does the dish move? (momentum: inelastic collision)
In a restaurant, one cook slides a 245-g delicious pizza down the counter from left to right at 1.63 m/s. At nearly the exact same time, another cook launches a 349-g cheeseburger along the same... more
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06/13/22

VII. Finding Similarities and Differences: CCI4 and CH3CI
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02/02/22

What is the correct set up for this problem?
1 Fe2O3 (s) + 6 HCl (g) --> 2 FeCl3 (s) + 3 H2O (g)How many grams of HCl are needed to react with 27.62 g of Fe2O3?-----------------------------------------------------= 37.29 g HCl
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12/12/21

Acid and Base Question

Which of the following is true about the theories that govern acid and base?A. P‎Cl3 ca‎n be class‎ified as a Lewi‎s a‎cid.B. Wa‎ter can be clas‎sified as a Bron‎sted-Lo‎wry aci‎d.C. All... more
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08/04/21

Alkanes are hydrocarbons containing only single bonds. Answer please
How many hydrogen atoms are in an acyclic alkane with 7 carbon atoms? H atoms : How many hydrogen atoms are in an acyclic alkane with 12 carbon atoms? H atoms :
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08/03/21

Write an equation in slope-intercept form of the line that passes through (-4,-1) and (8,-4).

kinda stuck need help on this problem
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07/27/21

The radial component of acceleration of a particle in circular motion is given by v2r (in magnitude) even when the speed v is not constant
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07/13/21

I do not understand

Dinitrogen oxide (N2O) which is used in dentistry, is an anesthetic also called "laughing gas." What is the pressure in atm of a 0.47 mol sample of N2O at 26 degrees Celsius in an 4 L... more
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07/06/21

A 25.0 mL solution of HNO₃ is neutralized with 10.3 mL of 0.250 M Ba(OH)₂. What is the concentration of the original HNO₃ solution?
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05/05/21

What mass of phosphorus is needed to make 35 moles of P2O5?

The equation is: 4P+5O2=2P2O5
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01/26/21

You have been tasked with determining whether a granulated, shiny metal is ahearnium or zinc.

You have been tasked with determining whether a granulated, shiny metal is ahearnium or zinc. A known mass of the unknown metal is reacted with hydrochloric acid to produce a dissolved ionic... more
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01/19/21

Calculate the elastic potential energy added to a spring with k = 20 N/m when the spring is stretched
Calculate the elastic potential energy added to a spring with k = 20 N/m when the spring is stretcheda) 0.30mb) an additional 0.30 mExplain.
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01/19/21

How many grams of Li3N are produced when 25 grams of N2 react with excess Li?
Balanced form: 6 Li + N2 = 2 Li3N
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01/15/21

a baseball is a solid sphere of radius 0.0372 m and mass 0.150 kg. a pitcher exerts a force tangent to the edge of the ball and causes an angular acceleration of 2380 rad/s^2.
how much force did he exert?
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01/15/21

Question of Physics
Two identical blocks of mass m are connected by a massless rope over a pulley of mass M with radius R and moment of inertia I =2/3MR2 about its center of mass. The rope does not slip on the pulley.... more
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01/14/21

need help with this

 On your cousin’s quinceañera day you leave for the church 30.0 min before the quince is to begin, which should leave plenty of time since the church is only 17.0 km away. On the way. However, you... more
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01/14/21

help me solve this

 Walking is difficult, especially on just two legs. Think of how long it takes for a human baby to “graduate” from crawling on all fours to standing upright and walking. Engineers working to... more
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01/14/21

Your value probably does not match the actual value for the hydrate. Use the following formula to calculate the percent error for the experiment. Remember to report an absolute value. [2]
Use your data to calculate the number of water molecules to two decimal places. [4]Moles of water H2O 11.38- 7.28 = 4.1g Moles of anyhydrate ( CuSO4)= 7.28/159.62 = 0.0456 moles of copper sulfaten... more
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01/14/21

Write an equation of the line that passes through (7,10) and is perpendicular to the line y=1/2x-9
Write an equation of the line that passes through (7,10) and is perpendicular to the line y=1/2x-9
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01/14/21

 In 1979, the estimated elephant population was 1.3 million and in 2007 it was 640,000. By approximately what percentage did the elephant population decline over this time period?
 In 1979, the estimated elephant population was 1.3 million and in 2007 it was 640,000. By approximately what percentage did the elephant population decline over this time period? (Show your work.)... more
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01/14/21

What is 6 more y than x as an equation?
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