11/02/20

How much nitrogen is needed to produce 51 tonnes of ammonia?
N2+3H2 ---------> 2NH3
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11/02/20

Help please with this problem?
A rod of length 20.00 cm has linear density (mass per length) given byλ = 50.0 + 20.5xwhere x is the distance from one end, and λ is measured in grams/meter.(a) What is its mass? _____g(b) How far... more
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11/02/20

how would you do this equation?
The half-life of polonium-218 is 3.0 minutes. If you start with 10.0 g, how long will it be before only 2.8 g remains?
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11/02/20

moles calculations

How many moles of tin atoms are in a pure tin cup with a mass of 31.5 gg 
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11/02/20

How many moles of Fe2O3 are in 205 g of the compound?
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11/01/20

A certain mass of nitrogen gas occupies a volume of 3.23 L at a pressure of 9.32 atm. At what pressure will the volume of this sample be 5.61 L?
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11/01/20

Trigninmetry Question ,please help!
2. A hot air balloon is to be attached to the grond using two support ropes. One support is attached on one side of the balloon at an angle of elevation of 42 degrees. Another support is attached... more
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11/01/20

In a titration of 0.368 L of 1.222 M B solution, how many liters of 1.088 M A solution are required to reach the end-point. A + 2B → 2C + D
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10/31/20

The average kinetic energy of the molecules in a gas sample depends only on the temperature, 𝑇.

However, given the same kinetic energies, a lighter molecule will move faster than a heavier molecule, as shown in the equation for rms = square root 3RT/ℳwhere 𝑅=8.314 J/(mol⋅K) and ℳ is molar... more
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10/30/20

What is the equation in slope-intercept form for the line parallel to y=-2x+10 that contains J(6,8)?
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10/30/20

which group contain and element that is liquid stp
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10/29/20

Write system of equation from context
Write System of Equations from ContextA paper company needs to ship paper to a large printing business. The paper will be shipped in small boxes and large boxes. The volume of each small box is 6... more
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10/29/20

Chemistry Question
What is the nuclear symbol for a radioactive isotope of copper with a mass number of 60?38.91cm *( 6.81cm-6.730cm)The student places 30.0 grams of sample (d=3.0g/cm^3) into a cylinder containing... more
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10/29/20

What is the frequency (in Hz) of its oscillation?
A hypnotist's watch hanging from a chain swings back and forth every 0.68 s. What is the frequency (in Hz) of its oscillation?
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10/29/20

Multi step equation
Dennis bought a variety pack of delicious donuts from Dunkin Donuts from his girlfriend Liz's store for his friends Bubba and Hooch. Bubba ate two-thirds of the pack and Hooch devoured one-fourth... more
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10/29/20

%yield and limiting reagents (pls show work on all probelms)
2. Fe 3 O 4 + 4 H 2 → 3Fe + 4H 2 Oa. If you start with 0.122 g of H 2 , how much H 2 O do you theoreticallymake?b. You make 0.745 g of H 2 O in the lab, what is your percent yield?3. 2Al+ 3Cl 2 →... more
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10/29/20

Which Line is perpendicular to 4y + 3x =12?
I need help someone please help quickly
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10/29/20

Write the standard form of the equation of the line described. Through: (-3,1), perpendicular to y=3/4x-1y= 4 3 ​ x−1
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10/29/20

Write the standard form of the equation of the line described. Through: (1,5), parallel to y=x+5y=x+5
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10/29/20

If you have a temperature of 29.6 C, what is the value in K? (follow sig figs and only enter numbers).

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10/29/20

A gas system has initial pressure and volume of 2790 torr and 14.32 L. If the volume changes to 16200 mL, what will the new pressure be in atm? (1 atm=760 torr)
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10/29/20

A closed gas system initially has volume and temperature of 5.43 L and 831 K with the pressure unknown. If the same closed system has values of 0.811 atm, 7.31 L and 501 K,

what was the initial pressure in atm rounded to the nearest hundredths place.
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10/29/20

A gas system has an initial temperature of 392 K with the volume unknown. When the temperature changes to 298 K the volume is found to be 4.77 L
What was the initial volume in L rounded to the hundredths place?
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10/29/20

A gas system has pressure, volume and moles of 2652 torr, 1670mL and 0.684moles, respectively. What is the temperature in C rounded to the singles place. (1 atm=760 torr; R = 0.08206 L atm/mol K )
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10/28/20

If Brittney drives to work, from home, at 50 mph, she’d arrive 1 minute late. If she drove at 60 mph, she’d arrive 5 minutes early.
How far from work does Brittney live?
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