03/14/18

How do I solve this equilibrium problem on the reaction HCO3-+H3O+<==>H2CO3+H2O
Consider the following equilibrium:   HCO3- + H3O+ <==> H2CO3+ H2O   Which of the following statements is true?     A. Products are favored because H2O is a stronger acid than... more
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03/14/18

How many pounds of hydrogen are left in the tank?
temperature is 268.5 kelvin A sample of hydrogen gas in a 1,000 gallon tank  inside pressure is 32.6
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03/14/18

What is the value of x in the equation 2.5x+10 = x-0.5?
Need help with homework.
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03/14/18

Which of the following solutions has the lowest electrical conductivity?
A. 1.0 M HI B. 1.0M NaOH C. 1.0M H2S D. 1.0M NaNO3
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03/14/18

Which of the following salts will produce a solution with the highest pH?
A. 1.0M NaNO3 B. 1.0M H2SO4 C. 1.0M NaHCO3 D. 1.0M NaH2PO4
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03/14/18

What is the value of Oh for H2PO4-
A. 1.3×10^-12 B. 6.2×10^-8 C. 1.6×10^-7 D. 7.5×10^-3
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03/14/18

Which of the following is true for a neutral solution?
A. [H3O+]=0.0M B.[H3O+]=[OH-] C. [H3O+]>[OH-] D. [H3O+]<[OH-]
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03/14/18

Use this information to calculate the molecule formula for the compound
Nicotine is composed of carbon, hydrogen and nitrogen and its molar mass is about 160g/mol. When 4.38mg of the compound burns completely in oxygen, the reaction produces 11.9mg of gaseous... more
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03/14/18

How many grams of oxygen gas are in the tire?
pressure is 40.0lbs/in2 temperature 22.5 celcius  volume 10.5 gallons
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03/14/18

you have 3.00 grams of Nitrgen gas in a 2.00 liter container. The pressure is measured in 450.5 mmHg. What is the temperature in Celsius of the gas?
3.00 grams of Nitrogen gas 2.00 liters  450.5 mmHg
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03/14/18

the mass of copper metal is 6.342g and the density of copper is 7.6g per cm/cube what is its volume
nsjassh  
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03/14/18

dosage calculation
give gentamicin to a 2900 gm newborn ivp over 20 minutes. Dosage for newborn is 0.3 mg/kg/dose. Gentamicin Is available in 1 mg/ml vial. How many Ml will you give
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03/14/18

if 20 mL of a 0.5 M sodium hydroxide solution is necessary to neutralize 40 mL of an acid solution , what is the concentration of the acid
 asking for help
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03/14/18

How many atoms are in two moles of carbon?
6.02×1023 atoms B. 6 atoms C. 1.20×1024 atoms D. 12.011 atoms
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03/14/18

Which element has properties similar to bromine
argon, selenium, florine, or krypton
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03/14/18

Express the density
Anna, Anh and Amir are each given a sample of an unknown polymer and asked to calculate the density of their sample to determine if it could be polyaniline. They find a published value for the... more
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03/13/18

What weight in grams would you need of Tris....
What weight in grams would you need of Tris (MWT 121 g/mol) to prepare 250 ml of a 10% w/v solution?
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03/13/18

What volume in ml would you need to prepare 500 ml of a...
What volume in ml would you need to prepare 500 ml of a 50 mM solution of Tris (MWT 121 g/mol) from 1L of a 1M stock?
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03/13/18

You counted 100 colonies of bacteria on a LB plate....
You counted 100 colonies of bacteria on a LB plate. The plate was created using 100 ul of a 1:100000 dilution. What was the number of bacteria in the original stock?
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03/13/18

How many ml of 4.1 mEq/mL magnesium sulfate solution are needed to prepare 16 mmol of magnesium sulfate in 100 mL of water
tried using a an equation that involved multiplying the 4.1 mEq/mL by the formula weight (246) and dividing by 2, the valence. I ended up with 504 mg/ml. I'm stuck after that.  
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03/13/18

how much pure alcohol is in 2L of 20% alcohol solution
this is a word problem.
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03/13/18

Chemistry help
A sample of gas at STP occupies 1.64 L. What volume would the gas occupy at 3.4 atm of pressure and -78 ⁰C?
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03/13/18

What is the size of the proton, neutron, and electrons of aluminum?
I have a project to due on aluminum and i need to know the size of the neutron cloud, size of the proton, neutron, and electron of aluminum; also a 3D model scale to size😳
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03/13/18

How many grams to make 1 liter of a 2.0 x 10-5 M crystal violet solution
How many grams to make 1 liter of a 2.0 x 10-5M crystal violet solution
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03/13/18

Write the basic differences between electronegativity and electron gain enthalpy
Write any two differences
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