02/12/18

Explain on the basis of electronic configuration:
The electron affinity of S is +200kJxmol-1 and of Cl is +348kJxmol-1    
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02/12/18

A sample of an ideal gas has a volume of 2.21 L at 279 K and 1.01 atm. Calculate the pressure when the volume is 1.23 L and the temperature is 299 K.
i need help with my chemistry sapling,so i can pass.
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02/12/18

If a 5.0 mL test tube has a concentration of 0.051 M iron, what is the mass of iron (in mg) in the test tube
please help!!!
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02/11/18

Order of Reaction and rate constant
The total pressure in atmospheres was recorded during the decomposition of acetaldehyde (CH3CHO(g)) at 701K for certain time intervals shown in the chart. Use the information to answer the... more
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02/11/18

How do I solve this problem on Idomethane?
Iodomethane (CH3I) is a commonly used reagent in organic chemistry. When used properly, this reagent allows chemists to introduce methyl groups in many different useful applications. The chemical... more
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02/11/18

sample of isopentyl acetate weighing 3.75 * 10^-3 g was burned in excess oxyf isgen to produce 8.87mg of carbon dioxide and 3.63 mg of water. empherical formula
emphericak formula of isophenyl acetate  
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02/11/18

How do I solve this AP Chemistry problem on an antidote for cobra venom
You and a co-worker have developed a molecule that has shown potential as cobra antivenom  (AV). This antivenom works by binding to the venom  (V), thereby rendering it nontoxic. This reaction can... more
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02/11/18

How do I solve this Chemistry problem on cobra venom
Cobra venom helps the snake secure food by binding to acetylchlorine receptors on the diaphram of a bite victim, leading to the loss of function of the diaphragm muscle tissue and eventually death.... more
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02/10/18

how many H- ions can one molecule of NaOH produce?
How many H+ ions can one molecule of citric acid produce? How many does this affect the titration of citric acid with NaOH?
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02/10/18

How do I solve this AP Chemistry problem on biodiesel
In an effort to become more environmentally friendly, you have decided that your next vehicle will run on biodiesel that you will produce yourself. You have researched how to make the biodiesel in... more
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02/10/18

Does dissolved carbon dioxide in the water lead to increased water temperature?
I understand that carbon dioxide emissions have lead to increased atmospheric temperatures, but as more carbon dioxide dissolves into the ocean can that lead to increased water temperature?
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02/09/18

chemistry question
Ammonia (the stuff used in floor cleaners) is manufactured using the Haber process, a high temperature process where gaseous hydrogen and nitrogen react according to the equation below.N2 (g) + 3... more
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02/09/18

chem question
What mass (g) of K2SO4 is produced if 18.0 g of KOH completely reacts with H2SO4 in the following reaction?2 KOH (aq) + H2SO4 (aq) \longrightarrow ⟶ K2SO4 (aq) + 2 H2O (l)
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02/09/18

please help with chemistry question
What mass of aluminum metal reacts to give 1.00 g of iron? 3 FeO (l) + 2 Al (l)\longrightarrow ⟶ 3 Fe (l) + Al2O3 (l)
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02/09/18

scientists can always separate a mixture into its different parts
not sure if it is true or false
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02/09/18

A reaction of 44.3 g of Na and 52.3 g of Br2 yields 53.5 g of NaBr. What is the percent yield?
i need to find the percent yield of the above equation..
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02/09/18

If 18mgs is equal to 3000 hits or 200cigarettes 24mgs is equal to how many hits and cigarettes
If 18mg is equal to 3000 puffs and 200 cigarettes how many puffs and cigarettes is 24mg
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02/09/18

If l=0, the only possible value for ml would also be 0, right?
I have a question asking the number of electrons in an atom with the following quantum numbers:   n=2  l=0 ml=+1 ms= -1/2   since l=0 the only possible value for ml would also be 0, wouldn't... more
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02/09/18

Word problem
You need to make 1litter of 50% dextrose solution. The only dextrose solution you have in stoke is 70%. How much of the 70% solution so you need to add to sterile water to make 1 litter of 50%... more
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02/09/18

Significant figures
4650.00g is equivalent to?  This number has 6 significant figures  my responses options are :  465,000. mg  or  4.65000 kg  i think the last one is the correct answer. I am right?    Thank... more
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02/09/18

72 is equal to 80% of a number n . Write and solve an equation to find n . Write the percent as a decimal.
Ugh gf ugh ihB. Vugf gf ugh ugh
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02/09/18

The function of the small intestine is the uptake of nutrients
ANIAML SCIENCE 
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02/09/18

. How many grams of dextrose are needed
a pharmacy tech must prepare 250 mL 0f 2.5% dextrose solution
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02/09/18

Mixing Ratio Formula
Mixing Ratio problemI need to blend two different hardnesses of rubber together to get a certain hardness.One is 40 hard the other 60 HardExample 40 60 blended in 1:1 ratio is equal 50 hard40 60... more
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02/08/18

Which ionic compound has the smallest electronegativity difference?
Considering binary ionic compounds, which ionic compound contains two elements that are closest to each other in terms of electronegativity?
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