08/27/18

Consider the equation shown below which is of the form y = mx + b.
Consider the equation shown below which is of the form y = mx + b. When a graph of ln(k) vs (1/T) was plotted for R = 8.314 J mol^-1 K^-1, a slope equal to -5.46 x 104^4 K was extracted from the... more
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08/27/18

General Chemistry HW
Solve for k2 in the equation below given the following data: k1 = 8.6 x 10^-2 M^-1s^-1, T1 = 523 K, T2 = 298 K, Ea = 100 x 10^3 J mol^-1, R = 8.314 J mol^-1 K^-1. You may round your answer to a... more
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08/27/18

The second of two numbers is 4 times the first. Their sum is 50.
I am struggling on these problems and I have no one to help me. Please help
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08/27/18

Enter the molecular formula for butane
Express your answer as a chemical formula 
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08/26/18

What are the answers to these Enthalpy questions? I need to check my them homework please
1.H2O(l) H2O(g)2.2 SO2 (g) + O2 (g) 2 SO3 (g)3.SO3 (g) + H2O(l) H2SO4 (l)4.2 HI(g) H2 (g) + I2 (s)5.4 NH3 (g) + 5 O2 (g) 4 NO(g) + 6 H2O(l)6.CH4 (g) + 2 O2 (g) CO2 (g) + 2 H2O(g)7.CH4 (g) + 2 O2... more
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08/26/18

An orange has 20 fewer calories than a banana. If 7 bananas have the same number of calories as 9 oranges, how many calories are in a banana?
I think it's confusing so I need help for it to make the equation so I can solve it.
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08/26/18

help me with this
Two numbers total 20, and their difference is 50. Find the smaller of the two numbers.The smaller number is  
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08/26/18

the sum of two consecutive integers is equal to the first number multiplied by three. what is the first number?
i need help with this question 
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08/26/18

3 times the square of a number X
How do I write 3 times the square of a number x  
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08/26/18

Carole is 25 years older than her cousin Amanda. Cousin Bill is 3 times as old Amanda. The sum of their ages is 90. What are each of their ages?
Carole is 25 years older than her cousin Amanda. Bill is 3 times as old as Amanda. Altogether their ages are 90.    
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08/26/18

Preparation of alkanes
Which of the following might be produced by the reaction of C2H5Cl and C3H7Cl with Na? I. CH4 II. C4H10 III. C5H12 A) I only B)IIandIII C)IandIII D) I and II E) I, II and III
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08/26/18

Ideal Gas Equation
When an evacuated glass vessel weighing 134.74g was filled with an unknown gas Y the pressure was found to be 99.3kNm-2 at 31•C, while the mass was 137.28 g. The glass vessel was then filled... more
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08/26/18

Preparation of alkanes
What are the name of the compounds which are formed by the reaction of 2-bromopentane and 2-methyl 3-chlorobutane with sufficient amount of Na?
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08/24/18

(Down in description)
You are researching the price of MP3 players. You found an average price of $58.80. One MP3 player costs $56 and another costs $62. Find the price of the third MP3 player.
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08/24/18

Buffers are weak acids or bases that can react with strong acids or bases to prevent sudden changes in pH
I need to know the answer so please tell me
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08/24/18

give solution
The population of a town was 50000 initially .It increased at 5% for a year and then decreased by 4% the next year.What is the population at the end of the two years?
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08/24/18

SOLUTION PLZ
selena bought shares for 25000.The investment increased at the rate of 4% the first year ,then decreased at 5% in the second year and during the third year again increased by 8%.Find the amount at... more
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08/24/18

2+x=2467 find the missing value of x
Please let this question
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08/24/18

joey bought a 72 ounce box of dog biscuits.How many pounds did he bye
how much did he bye
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08/23/18

Chemistry HW
Suppose that you wish to make a very dilute solution of lemonade. If you take a lemonade mixture that is half of the concentration recommended on the package (call it 0.5x) and mix 10 mLs of it... more
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08/23/18

How many mols of hexane are there in 5 mL if the density, d, of hexane is 0.655 g/mL and the molecular weight is 86.18 g/mol?
How many mols of hexane are there in 5 mL if the density, d, of hexane is 0.655 g/mL and the molecular weight is 86.18 g/mol?
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08/22/18

chemistry question??
Why is  Iron (lll) and copper (ll) sulfate a single double replacement when they react with one another?
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08/22/18

What is the mass of dry precipitate actually collected?
Excess sodium Phosphate is mixed with 543.3moL of Strontium Chloride at a concentration of 0.728 mol/L. If the reactions has a 49.36% yield, what is the mass of dry precipitate actually collected?
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08/21/18

[Math] Finding density of the object
Approximate the volume of each object whose mass is given. Then find the mass per unit of volume, or density, of each object.   The problem is, I don't know where to... more
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08/21/18

Check for my answers for me thank you
A 250 mL sample of gas was initially at a pressure of 101 kPa at 80°C. If the volume decreases to 100 mL at 50°C, how would you calculate the new pressure?I would calculate it by doing this:101 kPa... more
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