01/29/18

When a student mixed 46.1 mL of 0.100 M NaOH with 50.0 mL of 0.100 M HCl, they found that 144.5 J of energy was produced.
Based on these results, what is the molar heat of reaction in kJ per mole?
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01/29/18

If you mix 45.4 mL of 1.000 M NaOH with 45.4 mL of 1.000 M HCl, what is the concentration of NaCl(aq) in the resulting solution? Report your answer to one deci
Help, I do not know where to even begin with this question! Due in less than 2 hours!
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01/28/18

Please help on this question
Nitrogen dioxide is used in the chamber process for manufacturing sulfuric acid. It is made by direct reaction of oxygen with nitric oxide: 2 NO(g)+O2(g)->2 NO2(g). How many liters of nitrogen... more
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01/28/18

Solve this question for me
Considering natural gas in a laboratory burner to be pure methane, CH4, calculate the number of grams of carbon dioxide that would result from the complete burning of 35.0L of methane, measured at... more
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01/28/18

0.710 grams of an unidentified gas is placed in a 390ml cylinder. At 52 degree C the gas yields a pressure of 520 torr. Find the molar mass of the gas.
Please solve this using gas law formulas
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01/28/18

A pressure of 850 torr is exerted by 28.6 grams of sulfur dioxide at a temperature of 40 degrees. Calculate the volume of the vessel holding the gas
Please solve this question
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01/28/18

How many metres
A snail crawls 93cm in 62 minutes it crawls another 19cm in 12 minutes how many metres does it crawl in total
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01/27/18

if i have a tube containing dna with the conc of 25 mg/ml and i remove 1ul from that tube into a new tube and add 999ul of dh20 into the new, how much dna do i
if i have a tube containing dna with the conc of 25 mg/ml and i remove 1ul from that tube into a new tube and add 999ul of dh20 into the new, how much dna do i have in my new tube?
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01/27/18

What Metal Carbonate and type of acid do you need to make Silver Chloride?
 silver + ? --> silver chloride
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01/26/18

Mg^2+ Is this saying that the magnesium has gained two electrons? How do I determine the amount of protons and neutrons?
I am reading chapter 2 of my textbook for the first time and it is talking about ions and how they either gain or lose an electron. What information am I supposed to take away or infere by the... more
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01/26/18

Textbook says only the noble gasses exist in nature as single atoms. It also says that monatomic ions contain only one atom. That seems contradictory
My textbook says the six noble gases are monatomic gases, and the only elements that exist in nature as a single atom. But on the next page it has a picture of the periodic table listing a bunch of... more
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01/26/18

electron configuration
P-323-
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01/26/18

How many grams of potassium chlorate is required to yield 3 L of oxygen at STP?
i am a student seeking for a answer in my question and i hope you cal help me with my problem
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01/25/18

how to calculate the percentage change say control blood glucose was 160 mg/dl and treatment blood glucose was 90 mg/dl
Control group = 160 mg/dl Treatment group = 90 mg/dl How to calculate percentage change from control
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01/24/18

A alloy has 58g of pure silver and 22g of pure copper what percentage of silver does the alloy have
What is the value and units
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01/24/18

How do I solve this problem on the freezing and boiling point of ethylene glycol?
What volume of ethylene glycol, C2H6O2, a nonelectrolyte, must be added to 15.0 L of water to produce an antifreeze solution with a freezing point of -25*C? What is the boiling point of the... more
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01/24/18

You have a prescription that calls for 1 cap by mouth three times a day for 10 days. How many capsules are needed?
Can you solve this problem for me?
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01/24/18

How to get the absolute zero from the graph for Charles law in Celsius?
I plotted the data points, and I got this for Charles law: y = 1.1906x + 279.18 R² = 0.9619 I don't understand how I'm supposed to get the absolute zero I know that y=mx+c will be V=mT+c for... more
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01/23/18

Which statement about water as a solvent is true?
A. Some solids, liquids, and gases can dissolve in water. B. Only solids and gases can dissolve in water. C. Only solids can dissolve in water. D. Only solids and liquids can dissolve in water.
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01/23/18

Calculating constant equilibrium
how do you calculate the constant equilibrium if what's known is ONLY the initial concentration of cC and dD aka the products.    Using the ice table how do you determine what the Keq if the... more
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01/22/18

A 5 mL sample of an unknown liquid is placed into a 250 mL flask that has had all of the air removed.
The pressure measured in the flask is found to be 35.6kPa. In a seperate trial the student puts 214 mL of the same liquid into the same flask at the same conditions. What will the pressure measure... more
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01/22/18

Calculate the volume of 3.62 mol methane (CH4) gas?
Calculate the volume of 3.62 mol methane (CH4) gas?
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01/21/18

A standard solution contained 0.8 mg/mL. A student took 2mL of the standard solution and added 10mL of water. What is the new/final concentration?
I am taking BIOCH 265ZA: Introduction to Organic and Biochemistry. I took Chemistry approximately 8 years ago and I am just lost. Could you please explain the solution in basic terms. I would... more
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01/21/18

When 7.00 g of sulfur are combined with 7.00 g of oxygen, 14.00 g of sulfur dioxide (SO2) are formed. What mass of oxygen would be required to convert 4.00 g of
What mass of oxygen would be required to convert 4.00 g of sulfur into sulfur trioxide (SO3)
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01/21/18

Organic chemistry on osmosis
Your penguin would like to know if his cells (isotonic .9 osM) would swell, remain the same size, or shrink when placed in each of the following solutions: A.) Distilled water B.) .9 M NaCl C.) 3 M... more
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