07/26/18

Chemistry chemical reaction rate questions
For the reaction 4NH3 + 7O2 --> 4NO2 + 6H2O.   a.) Provide a valid expression for the reaction rate   b.) How is the rate at which O2 disappears related to the rate at which NO2 appears in... more
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07/26/18

Chemistry 2 rate of reaction homework help
The decomposition of nitramide, NH2NO, is a first-order reaction.   a.) Write the rate law formula. b.) When starting with 0.105 M NH2NO2, with rate constant k = 5.2 x 10^-2 s^-1 at 15Celsius,... more
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07/26/18

If an employee earns $638. In 88 hours, how much does he earn in 40 hours?
How much does he earn in 40 hours?
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07/26/18

the sum of two numbers is 50. the greater number is 38. find the difference between the two numbers
the sum of two numbers is 50. the greater number is 38. find the difference between the two numbers  
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07/26/18

what medal has Its mass is 13.5 grams, and its volume is 5 cm3.
what medal has Its mass is 13.5 grams, and its volume is 5 cm3.
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07/26/18

what is a system in chemistry
 i would like to know how a chemistry student can define a system  
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07/26/18

find number of molecules
calculate number of molecules in 9g of CO2
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07/25/18

What is the percent abundance of the heaviest isotope?
A newly discovered element has an average atomic mass of 552.6209 amu. The element is found to have three isotopes. The first isotope has a mass of 551.1 amu and an abundance of 37.55 %. The second... more
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07/25/18

where can i mix oxalic acid with, that will still remain its ability to remove rust?
i need to mix oxalic acid with something what will still remain its ability to remove rust. (something that is not hard to get)
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07/24/18

how Many grams of element z
137.34 grams of element X reacts with 67.41 grams of element Z to form a compound. How many grams of the same compound could be produced using 55.1 grams of element X with excess element Z?
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07/24/18

0.5lb, 42kg dog, 2mg/ml
at 0.5 MG/LB, how much Azium would you give a 42KG dog? Azium comes as 2mg/ml:
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07/24/18

What would be the total weight, in kilograms, of exactly 0.3 mole of people if the average weight of a person is 73,000 grams?
Weight problem
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07/23/18

How many moles of ammonium ions are in 51 grams of ammonium carbonate?
Moles problem
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07/23/18

if a substance is made naturally in the human body, can it be considered "natural" and used in a multi surface home cleaner?
the substance is hypoclorous acid, and it is found places other than the human body. i was wondering if this was able to be considered a natural substance
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07/23/18

find no. of atoms present in 120amu of Ca
Amu topic of some basic concepts of chemistry 
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07/23/18

explain about amu or unified mass for solving questions.
Mass concept of elements and their unified mass
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07/22/18

Describe h2o electron pair geometry
Include the shape of the molecule taking into account all electron pairs.
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07/22/18

Hb(aq) + O 2(g) ↔ HbO 2(aq)
I am asked to write an equilibrium expression, and to include the term pO2 for the oxygen gas term. 
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07/22/18

Find the no of carbon atom in a 60 gram pencil containing 60%graphite
I want to learn chemistry bcz i am a medical student
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07/21/18

How do you create serial dilutions of a pure compound while maintaining a 0.1% DMSO concentration in each solution?
I need to test various concentrations of a compound however it is only soluble in DMSO. My compound is in pure powder form (I only have 900mg available, and it will be dissolved in 100% DMSO... more
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07/20/18

hoe much 250mg/ml Amikacin would a 143 lb Alligator receive, at a dosage of 2.25mg/kg?
250 mg/ml Amikacin  143 lb Alligator  2.25 mg/kg 
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07/20/18

Ivomec, when used in birds, is dosed at a rate of 0.2mg/kg. How many mms would a 657gm bird get if the strength of the Ivomec is 10mg/ml?
Rate of 0.2mg/kg  657gm bird 10mg/ml 
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07/20/18

Cefa tabs (250mg/tab) are dosed 10mg/ib BID for 7 days. How many tablets would it take to fill a prescription for a 12kg dog?
250mg/tab 10mg/lb for 7days for a 12kg dog. 
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07/20/18

crystalline solid do not have definite melting point ?
crystalline solid do not have definite melting point ?  
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07/20/18

Question about how significant digits work in chemistry.
I'm doing my online chemistry summer class and significant digits are included, of course. But I'm confused about them because everything I believe is being contradicted. Here's what I... more
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