03/25/20

How many moles of SO2 are present in a 2.22 L cylinder if the temperature is 150.0oC and the pressure is 5.53 atm?
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03/25/20

Potential Diagram

how make a diagram for N2(g) +O2(g)🡪2NO(g) △H=+182.6kJ
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03/23/20

Use the van der Waals equation of state to calculate the pressure of 3.80 mol of NH 3 at 465 K in a 5.20 L vessel. Use this list of van der Waals constants.
Use the ideal gas equation to calculate the pressure under the same conditions.
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03/22/20

A helium balloon, which originally contained 0.40 moles of helium, lost 10.
A helium balloon, which originally contained 0.40 moles of helium, lost 10. percent of its volume. Assume that the temperature and pressure stay constant. How many grams of helium escaped from the... more
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03/22/20

The propeller of a 90-horsepower outboard motor rotates at exactly 2000revolutions per min. Find the angular speed of the propeller in radians per sec.
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03/21/20

A gaseous compound has a density of 1.89 g/L at 27.4 °C and 1.80 atm. What is the molar mass of the compound?
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03/21/20

Use the van der Waals equation of state to calculate the pressure of 3.80 mol of NH 3 at 465 K in a 5.20 L vessel. Use this list of van der Waals constants.
P= ?atmUse the ideal gas equation to calculate the pressure under the same conditions.P=?atm
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03/21/20

Calculus Question
Find the absolute maximum and absolute minimum values of f on the given interval.f(x) = x4 − 8x2 + 6,    [−3, 4] absolute minimum: absolute maximum:
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03/21/20

F1 is a force of 5 N pulling an object south and F2 is a force of 3 N pulling an object in the compass direction of N 40 degrees E. Find the magnitude of the resultant vector.
Extra note: I'm having some trouble when it comes to modeling what's going on in the question. Will F2 approach F1 as F1 heads south and F2 heads N 40 E (so each object starts at a different... more
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03/19/20

What is the area of a sector that has a radius of 25 mm and has an angle measure of 50°?
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03/18/20

Periodic table/electron configuration/ion help
Electron configuration of the element: 1s22s22p63s23p64s21s22s22p63s23p4Cation formed?Anion formed?Formula of ionic compound formed?
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03/18/20

A ladder 10 ft long rests against a wall. If the bottom of the ladder slides away at a rate of 0.9 ft/s, how fast is the angle changing when the bottom of the ladder is 6 ft from the wall?

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03/18/20

A buffer that contains 0.35 M of acid, HY and 0.3 M of its conjugate base Y-
A buffer that contains 0.35 M of acid, HY and 0.3 M of its conjugate base Y-, has a pH of 4.8. What is the pH after 0.018 mol of Ba(OH)2 are added to 0.82 L of the solution?The answer is 4.92
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03/18/20

Which equation would be parallel to the line y=6
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03/18/20

Finding horizontal tangent.
YouThe question is to find all values of x for which the curve y = ((x^2)/4)^x has horizontal tangents.The curve lies above the X axis and is defined for only x greater than or equal to 0.
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03/18/20

25 g of Mercury is heated from 25 C to 155C, and it absorbs 455J of energy. Calculate the specific heat /C ?
Measuring Heat Q=mc∆T
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03/13/20

writing liner equation given point slope
write the equation of the line
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03/13/20

Find the inflection point, if any, for the function f(x) = x^3 + 3x^2 + 1
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03/13/20

Trigonometry Question
If sin θ = 12/13, and cos θ > 0, find tan θa. 12/5b. -12/5c. 5/12d. -5/12I got answer A.
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03/13/20

A student nicely places a piece of metal into a cup with 36.00g of 33.0°C water. The hot metal caused the water temperature in the cup to go up to 37.8°C.

How much heat did the water absorb from the metal?i just need to know how to set it up.
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03/11/20

A small tank of propane is opened and releases 30.0 L of gas at STP. What mass of gas was released?
How do I go about to solve this kind of question?
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03/11/20

Algebraic Word Problem
The volume, V, of a certain gas varies inversely with the amount of pressure, P, placed on it. The volume of this gas is 175 cm^3 when 3.2 kg/cm^2 of pressure is placed on it. What amount of... more
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03/10/20

chem homework please help
A 7.75 L container holds a mixture of two gases at 45 °C. The partial pressures of gas A and gas B, respectively, are 0.295 atm and 0.776 atm. If 0.190 mol of a third gas is added with no change in... more
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03/10/20

Find the position function, s(t), describing the motion of the object. 
An object has a constant acceleration of 40 ft/sec2, an initial velocity of -20 ft/sec, and an initial position of 10 ft. Find the position function, s(t), describing the motion of the object. 
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03/10/20

Separations part 3
If a sample contained 11.647 g of sand, 0.975 g of sodium chloride and 8.824 g of tin shot, what is the percentage of each component in the mixture?
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