07/23/20
Compute the root-mean-square speed of He molecules in a sample of helium gas at a temperature of 105°C.
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07/22/20
A commercial refrigeration unit accidentally releases (7.39*10^1) mL of ammonia gas at SATP. Determine the mass and number of molecules of ammonia gas released.
Please show all the work, because I am getting 2 different answers.Note: Your answer is assumed to be reduced to the highest power possible.
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07/22/20
Calculate the heat energy released when 14.0 g of liquid mercury at 25.00 °C is converted to solid mercury at its melting point.
constants for mercury at 1 atm:heat capacity of Hg(l) is 28.0 J/mol*Kmelting point is 234.32 Kenthalpy of fusion is 2.29 kJ/mol
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07/21/20
In the laboratory you dilute 5.09 mL of a concentrated 12.0 M perchloric acid solution to a total volume of 150 mL. What is the concentration of the dilute solution?
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07/20/20
What volume of a 0.352 M hydrobromic acid solution is required to neutralize 24.1 mL of a 0.119 M barium hydroxide solution?
mL hydrobromic acid
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07/20/20
How many text messages before they are the same
Ciera pays $15 a month plus .15 a text message for her cell phone. Alexis pays $20 a month plus .05 a text message. After how many text messages will the cost be the same for both companies?
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07/19/20
Using this equation, find out what price the widgets should be sold for, to the nearest cent, for the company to make the maximum profit. y=−x 2 +89x−747
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07/19/20
Which of the following factor does not affect an enzyme's activity and why?
a. colorb. temperaturec. concentrationd. pH
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07/17/20
2. What color would a Gram-negative cell be if we skipped the alcohol step? What color would a Gram-positive cell be if we skipped the same step? Why?
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07/16/20
what is the new volume, , of the gas?
A sample of gas in a balloon has an initial temperature of 21 and a volume of 1890 . If the temperature changes to 93 , and there is no change of pressure or amount of gas.
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07/16/20
What is an equation of the line paraellel to the line on the graph that passes through (4,15)? (APEX) (I need this answered now)
Ishwar pours sand into bucket at a constant rate. The graph shows the total weight of the bucket and the sand over time. After 10 seconds, the total weight is 50 ounces.What is an equation of the...
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06/27/20
A perfect cube of a gold metal was found to have a mass of 45.85 g. The density of the gold is 19.3 g/cm3 . Calculate the dimensions of the cube
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06/25/20
A sample of helium (He) effuses 2.0 times faster than another gas. What is the molar mass of the other gas?
the correct answer is 16g/mol. I just need an explanation. Thank you!
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06/20/20
How cell phones affect children’s cognitive development
Knowing that we as adults are increasingly fixated on our phones and other electronic devices, how will this impact children's cognitive development? Have you seen infants with phones in their...
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06/18/20
Inequality Based Word Problem
To rent a certain meeting room, a college charges a reservation fee of $32 and an additional fee of $9.40 per hour. The chemistry club wants to spend at most $107.20 on renting the meeting...
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06/17/20
The interation of living organisms
The interaction of living organisms and the physical environment in a defined boundary is the definition of:A. ecology B. community C. population D. ecosystem
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06/04/20
Gytis Enzymes
Enzymes are very specific for the reactions they can catalyse, explain why this is important.
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Need help with this algebra question
A company purchased a new piece of machinery for 60,000 and wants to resell it after 11 years. If the machine loses 9% of its value every year, Write an explicit equation to find out what it will...
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05/21/20
seven subtracted from y is greater than 22
seven subtracted from y is greater than 22
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05/21/20
Big ideas chapter 8 algebra 2
After each charging, a battery is able to hold only 98% of the charge from the previous charging. The battery was used for 20 hours on its first charge before it had to be recharged. What is the...
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05/20/20
A father and his son can clean the house together in 9 hours. When the son works alone, it takes him an hour longer to clean than it takes his dad alone. Find how long it takes the son to clean alone
can Someone please answer
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