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Simplify (8x2 − 1 + 2x3) − (7x3 − 3x2 + 1).−5x3 + 11x2 − 2 5x3 − 11x2 + 2 x3 + 2x2 + x3 x3 − 2x2 − x3
1. 1 answer
2. 69 views
Choose the correct product of (5x − 11)2.25x2 − 110x + 121 25x2 − 121 25x2 + 121 25x2 + 110x + 121
1. 1 answer
2. 55 views
Choose the correct simplification of the expression −4x2(6x − 5x2 − 5).20x4 + 24x3 + 20x2 −9x4 + 2x3 − 9x2 20x4 −
1. 1 answer
2. 87 views
The three sides of a triangular fence have lengths 3x + 4, y − 5, and 7x − 1. What is the total perimeter?10x + y − 2 10x
1. 1 answer
2. 45 views
Choose the correct simplification of the expression 8 times b all over a to the power of negative 5.a to the 5th power times b
1. 1 answer
2. 58 views
Divide 15a6b4 by 5a2b.3a8b5 3a4b4 3a4b3 3a3b4
1. 1 answer
2. 36 views
Which expression is the result of the perimeter of rectangle A and demonstrates the closure property?10x + 4; the answer is a
1. 1 answer
2. 57 views
Divide 12x3 − 6x2 − 3x by −3x.−4x3 − 2x2 − x −4x2 + 2x −4x2 + 2x − 1 −4x2 + 2x + 1
1. 1 answer
2. 75 views
Which expression represents the amount of money the friends still need to collect to meet their goal?4x2 + 2xy + 7 5x2 − 6xy
1. 1 answer
2. 74 views
Choose the correct sum of the polynomials (3x3 − 5x − 8) + (5x3 + 7x + 3).8x3 + 2x + 5 2x3 − 12x − 11 2x3 + 12x − 5
1. 1 answer
2. 68 views
Choose the correct simplification of the expression (7x − 3)(4x2 − 3x − 6).28x3 − 33x2 − 33x − 18 28x3 + 33x2 −
1. 1 answer
2. 61 views
Simplify (2x5y2)(3x3y).5x8y3 6x8y3 6x8y2 6x2y
1. 1 answer
2. 41 views
Choose the correct simplification of the expression (3xy4)2(y2)3.6x2y14 9x2y14 9x3y11 6x3y11
1. 1 answer
2. 74 views
A city plans to plant grass seed in a public playground that has the shape of a triangle with a height of H = 50 m and a base of
1. 3 answers
2. 2,682 views
How would I calculate the number of moles of AgNO3?I have .0025L but don't I need the Molarity? I have no idea how to find that.
1. 2 answers
2. 529 views
what else could you use the Volhard method in Chemistry for? like is it used in a certain context?
1. 1 answer
2. 455 views
Version A formular:3Zn(OH)2 + 2Zn(CO)3(s)----------------------------->5ZnO(s)+2CO2(g) +3H2O(g) 105.4mL of Co2(g) was generated
1. 1 answer
2. 554 views
I have to calculate the ΔV= final volume-initial volumeFor the first trial the final volume was .005mL the initial volume was
1. 0 answers
2. 590 views
I have to calculate the ΔV= final volume-initial volumeFor the first trial the final volume was .005mL the initial volume was
1. 0 answers
2. 681 views
4.) 105.4mL of Co2(g) was generated with a pressure of 765.5mm Hg for the gas. The temperature of the apparatus was 25.0C. How
1. 1 answer
2. 465 views
1.) 1.25 moles of an ideal gas are contained in 8.0L. If the temperature is 33K, what is the volume at STP?
1. 1 answer
2. 476 views
2.) An ideal gas in a 6.30L container at 3.50 atm and at 273K is heated to 435.0K. What is the new pressure?
1. 1 answer
2. 467 views
2.) An ideal gas in a 6.30L container at 3.50 atm and at 273K is heated to 435.0K. What is the new pressure?
1. 1 answer
2. 458 views
3.) Co2(g) is collected over water at 20 degrees Celsius. The pressure in the bottle is equalized with the atmospheric pressure,
1. 1 answer
2. 633 views
1.) 105.4mL of Co2(g) was generated with a pressure of 765.5mm Hg for the gas. The temperature of the apparatus was 25.0C. How
1. 1 answer
2. 420 views
1.) 1.25 moles of an ideal gas are contained in 8.0L. If the temperature is 33K, what is the volume at STP?
1. 1 answer
2. 472 views
Exactly .203g of zinc metal is dissolved in dilute HCl(aq) in an ice calorimeter. The heat released melts enough ice to produce
1. 2 answers
2. 625 views
1. In an ice calorimeter experiment, what is the relationship between joules and volume change expressed in joules/mL of volume
1. 0 answers
2. 977 views
addition of 1.280g of zinc metal to 100mL of 0.3917 M HCl in a coffee-cup calorimeter causes the temperature to increase from 1
1. 5 answers
2. 1,623 views
Calculate the volume of concentrated NaOH solution (which contains 500.00g of NaOH per liter of solution) that you will need to
1. 2 answers
2. 1,273 views
Calculate the mass of KHP which will result in an endpoint of 20.00mL when titrated against 0.097M NaOH
1. 1 answer
2. 545 views
Calculate the volume of 0.102M NaOH necessary to react with 22.00mL of 0.10M HCl.
1. 1 answer
2. 496 views
A titration of 15.75mL HCL of an unknown molarity requires 20.35mL of 0.0903M NaOH solution. What is the molarity of the HCl
1. 2 answers
2. 670 views
A student adds 25.00mL of distilled water to a 10.00mL sample of HCl of an unknown molarity and titrates this against a 0.085M
1. 1 answer
2. 669 views
2.) If you pass 10.0mL of a 50.0mL solution of [Co(en)2Cl2]Cl that has been reduced with Zn through a cation exchange column,
1. 0 answers
2. 701 views
If you pass 10.0mL of a 50.0mL solution of [Co(en)2Cl2]Cl that has been reduced with Zn through a cation exchange column, you
1. 0 answers
2. 613 views
2.) If you pass 10.0mL of a 50.0mL solution of [Co(en)2Cl2]Cl that has been reduced with Zn through a cation exchange column,
1. 1 answer
2. 740 views
If you pass 10.0mL of a 50.0mL solution of [Co(en)2Cl2]Cl that has been reduced with Zn through a cation exchange column, you
1. 1 answer
2. 738 views
If you pass 10.0mL of a 50.0mL solution of [Co(en)2Cl2]Cl that has been reduced with Zn through a cation exchange column, you
1. 1 answer
2. 786 views
2.) If you pass 10.0mL of a 50.0mL solution of [Co(en)2Cl2]Cl that has been reduced with Zn through a cation exchange column,
1. 1 answer
2. 682 views
How is the nervous system used when you eat
1. 1 answer
2. 535 views
The following equilibrium concentrations were observed for the Haber process at 127 oC:[NH3] = 3.1 x 10-2 mol L-1 [N2] = 8.5 x
1. 3 answers
2. 946 views

Answers (17)

help
1:100 One square = 30cm 100 squares = 3,000cm 100cm = 1m Therefore the answer is 30m^2
it 100
Thanks !
which one
connexus user 6th G Is right THX
yuyu
@Quit Cheating sorry but.. you* your*
-1.8375
0.047
Yes okay thank you! I figured it out.
So I did: 100 x 4.18 x (21.11-15)=2553.98 then I divided it by 1.28=1995.29 and I multiply it by 65.28/1mol=12969. Divide it by 1000 to get 130kJ/mol but its still not the right answer =(
I am trying to find Kj/mol in reaction
wxw
Is 8.35 x 10^9mPa the right answer?
I meant mol/L^-1 or whatever the unit is. That's what the question had. Umm can you please help me with this question?
for the concentrations I meant [NH3] = 3.1 x 10^-2 mol [N2] = 8.5 x 10^-1 mol [H2] = 3.1 x 10^-3 mol

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