04/02/21

Does a reaction happen when combining H2SO4 and ammonium sulphate?
this one is stumping me. This is the net ionic equation I have so far but I’m not confident in it.2H+(aq) + 2SO4^2-(aq)—-> (NH4)2S2O8 (s) + H2 (g) Is there even a reaction between the two? If... more
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03/24/21

Find the resultant (magnitude and directional angle
The three displacement vectors in the drawing have magnitudes of A = 5.15 m, B = 5.40 m, and C = 4.20 m. Find the resultant (magnitude and directional angle) of the three vectors by means of the... more
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03/17/21

I need help writing a rate law
(H2O2) decomposes into water and oxygen gas in the presence of light. [H2O2] was monitored in the data shown in the graph. What is the rate law for the decomposition of hydrogen peroxide?
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03/17/21

Differential Equations Application (Newton's law of cooling)
Let T (t) denote the temperature of an object after t minutes and let Ts denote the temperature of its surroundings. Newton’s Law of Cooling states that dT/dt = k (T − Ts), where k is a constant.... more
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03/17/21

Two ships leave a port at the same time. The first ship sails on a bearing of 40° at 18 knots and the second at a bearing of 130° at 24 knots. How far apart are they after 2 hours?
Two ships leave a port at the same time. The first ship sails on a bearing of N15°W at 24 knots and the second at a bearing of N36°E at 19 knots. How far apart are they after 2 hours? (One knot is... more
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03/07/21

Find the sum, if it exists, of the infinite geometric series, 3 minus 3 over 5 plus 3 over 25 minus 3 over 125 plus etc

Find the sum, if it exists, of the infinite geometric series,   A 1 B C D Sum does not exist
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03/07/21

pH of a solution from M and Ka
What is the pH of a 0.320 M solution of Ca(NO₂)₂ (Ka of HNO₂ is 4.5 × 10⁻⁴)?What I did :0.320 x 4.5x2= 1.44x 10-4x = 0.037947-log (0.037947)pH = 1.42The software says that is incorrect, so I'm not... more
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03/02/21

what is the volume? How many cans of paint will the farmer need to buy in order to paint the entire silo.
what is its volume. A typical can of paint covers 400 squared meters. How many cans of paint will the farmer need to buy in order to paint the entire silo.
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03/01/21

A company rents water tanks shaped like cylinders. Each tank has a radius of 4 feet and a height of 3 feet. The cost is $5 per cubic foot. How much does it cost to rent one water tank?

Use 3.14 for π, and do not round your answer.
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02/28/21

Find the exact location of all the relative and absolute extrema of the function.

h(x) = 3(x − 1)2⁄3 with domain [0, 2]
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02/25/21

get the number of molecules within Benzoyl Peroxide
This is what I have so far but I don't know how to get the number of molecules within Benzoyl Peroxide?Benzoyl Peroxide aqueous Base, Acne Treatment Gel contains 10% of benzoyl peroxide... more
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02/25/21

Find the inverse function of f. f(x)= x-2/x+2
Find the inverse function of ff(x)= x-2/x+2Thank you
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02/24/21

If f(1) = 9 and f '(x) ≥ 3 for 1 ≤ x ≤ 6, how small can f(6) possibly be?
If f(1) = 9 and f '(x) ≥ 3 for 1 ≤ x ≤ 6, how small can f(6) possibly be?
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02/22/21

Whispering Gallery Word Problem
In a whispering gallery, any sound at one focus of an ellipse reflects off the elliptical roof directly to the other focus. If the center of the whispering gallery is x, find the distance that... more
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02/21/21

what is the exact value of sin(u/2) given the angle 112.5 degrees?
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02/21/21

anti-derivative help please!
the limit below represents the derivative of some function in the number a:lim h-->0 = 4(3+h)^5 - 972 ----------------------- hI need the original... more
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02/21/21

planet chacha has an elliptical orbit around the sun. Data indicates that the planet has a speed of 30 km/s during perihelion with a distance of 1.52 E 8 km from the center of the planet to its sun.

planet chacha has an elliptical orbit around the sun. Data indicates that the planet has a speed of 30 km/s during perihelion with a distance of 1.52 E 8 km from the center of the planet to its... more
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02/18/21

GRAVIMETRIC DETERMINATION OF THE WATER OF HYDRATION OF EPSOM SALTS

How do I find mass of water (g) lost during heating of an epsom salt sample?
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02/17/21

Find a + b, a − b, 4a + 5b, 4a − 5b, and ||a||.
a=-(5,-6), b=3(0,-6) a + b  =    a − b  =    4a + 5b  =    4a − 5b =    ||a|| =  
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02/17/21

Thermodynamics (physical chemistry)
An ideal atom is 2 moles of gas at 0 C at 45 dm3. The gas is allowed to expand in an adiabatic, quasi-stationary process until its temperature drops to -50 ° C. What is the pressure in the initial... more
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02/16/21

For the given function find the average rate of change over each specified interval.
For the given function find the average rate of change over each specified interval. f(x) = x2 + x − 12[-1 , 10]
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02/16/21

calculus homework help please
A radar gun was used to record the speed of a swimmer (in meters per second) during selected times in the first 2 seconds of a race. Use a trapezoidal sum with 4 intervals to estimate the distance... more
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02/12/21

You tie a 0.0750kg rock to a string
and swing it like a conical pendulum. The radius of the circle is 25.00cm. When you measure the time it takes the stone to make one orbit, you find its 1.45s.How fast is the rock moving? Assume the... more
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02/12/21

How do I solve this
A mortar is like a small cannon that launches shells at steep angles. A mortar crew is positioned near the top of a steep hill. Enemy forces are charging up the hill and it is necessary for the... more
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02/12/21

Stats Help Please!!!
Consider two boxes, first one (B1) contains 6 green (G) and 5 red (R) balls, the second box (B2) contains 4 green (G) and 7 red (R) balls. We toss a fair coin and select one of the boxes from which... more
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