10/12/18

How many full vials of a drug needed to make sure there is enough drug for the first four hours?
I know that the drug is available as 1 mg/mL in 5 mL vials.I know the drug is delivered at a rate of 3.6 mg/kg/hr.Am I supposed to multiply 3.6 * 4= 14.4 because it’s asking about 4 hours? If if so... more
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10/12/18

chemistry solutions
A chemist needs to create a series of standard Cu2 (aq) solutions for an absorbance experiment. For the first standard, he uses a pipet to transfer 5.00 mL of a 2.93 M Cu2 (aq) stock solution to a... more
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10/11/18

The fastest a human has ever run is 27 miles oer hour. How many miles per minite did the human run?
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10/11/18

Better way to say "a phenomenon with which I'm all too familiar"?
Sounds cliche, and "something I've experienced a lot" doesn't cut it. Need something better but can't think of it right now.
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10/11/18

Ramesh buys 13 registers for $169.find the cost of 27 such registers
It can be direct or indirect variation
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10/11/18

Please help with chem homework!!??
 A 155.0 mL solution of 2.996 M strontium nitrate is mixed with 220.0 mL of a 2.924 M sodium fluoride solution. Calculate the mass of the resulting strontium fluoride precipitate. Assuming complete... more
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10/10/18

o2SbO+ + 2Cd2++ 3H2OSb2O5 + 2Cd+ 6H+ In the above redox reaction, use oxidation numbers to identify the element oxidized, the element reduced, the oxidizing agent and the reducing agent.
2SbO+ + 2Cd2++ 3H2OSb2O5 + 2Cd+ 6H+ In the above redox reaction, use oxidation numbers to identify the element oxidized, the element reduced, the oxidizing agent and the reducing agent. name of... more
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10/10/18

An unknown substance has a volume of 6.7 cm3 and a mass of 75.7 g .
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10/10/18

NEED HELP WITH CHEMISTRY EQUILIBRIUM PROBLEM
a. Vanillic acid reacts in water as follows: HC8H7O4(aq) + H2O (l) -----> H3O+(aq) + C8H7O4^–(aq) Kc= 3.1 x 10^-5 Determine the equilibrium concentrations of HC8H7O4, H3O+ and C8H7O4^–. Start by... more
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10/09/18

Need help with this chemistry question
a. Consider the following equilibrium: PCl3 (g) + Cl2 (g) ----> PCl5 (g) ∆H= –92kJ Suppose this reaction is at equilibrium. Identify all possible disturbances (external stresses) that would... more
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10/08/18

How many tablets should a 34 kg patient take every four hours?
A doctor administers a drug to a 34 kg patient, using a dosage formula of 50 mg/kg/day. Assume that the drug is available in a 300 mg per 5 mL suspension or in 400 mg tablets.
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10/08/18

consider the the molecular formula CH5N. Would you expect this compound to contain any double or triple bonds?
with your knowledge of typical bonding patterns too fully support your answer
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10/08/18

The process of tanning as a result of UV exposure is due to what cell type?
 anatomy & physiology 10th edition 
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10/07/18

Which of the following functional groups acts most like an acid in water? A) carboxyl B) amino C) carbonyl D) hydroxyl
I got answer D wrong on my homework and would like to know why and could you please explain briefly why the correct answer is right. 
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10/07/18

Buffers on a System
What are the effects on pH by addinga. 0.0060 mol of HCl b. 0.0060 mol of NaOH to 0.300L of a buffer system that is 0.250M acetic acid and 0.560M sodium acetate? First find the pH of the buffer... more
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10/07/18

Magnesium Isotopes
If magnesium has two isotopes, one that weighs 24 amu and another that weighs 25, and one out of every three atoms of magnesium has a mass of 25, then what is the atomic mass for naturally... more
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10/06/18

rate reactions - what will adding more reactants do to the reaction
 hey, so there is a question i'd like to know. What will adding more reactants do to the rate reaction? Like for example, CH4+O2 -> CO2 + H2O like what happens if i add more methane?
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10/06/18

how is Fe{3+} affected when you ADD HPO4{2+}?
Solution: Fe{3+}(aq) + SCN{-}(aq) —> Fe(SCN){2+}(aq)I know that the color gets clear when you add HPO4{2+}, but I don’t know why.
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10/06/18

why is adding first electron favorable and adding 2nd electron unfavorable?
Electron Affinity 
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10/06/18

Reaction of alcohols with alkali metals
When 106 grams of a mixture of cyclopentanol and water reacts with excess Na, 44.8 L of H2is produced atSTP. Find the mole percentage of cyclopentanol in the mixture?
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10/06/18

What is the standard entropy of Ca(s) + MgSO4(s) → Mg(s) + CaSO4(s)?
Standard entropy values:Ca(s): 41.6MgSO4(s): 91.6Mg(s): 32.7CaSO4(s): 106.5
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10/06/18

I do not know how energy released from an atom can be used to explain ionic bonding or covenant bonding. Pleas help!!
I don't know how electron affinity is related to bondings
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10/05/18

What it the pH of 0.37M KC6H7O2(aq)? Given pKa of 4.77.
Sorbic acid HC6H7O2 (pka = 4.77), is widely used in the food industry as a preservative. For example it's potassium salt, (potassium sorbate) is added to cheese to inhibit the formation of mold.... more
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10/05/18

very confusing chem question
he following reaction illustrates the decomposition of hydrogen peroxide (H2O2) to form water and oxygen gas:2 H2O2 (l) → 2 H2O (l) + O2 (g)When this reaction is carried out, 0.50 L of O2 gas is... more
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10/05/18

chemistry question
A flask contains a mixture of nitrous oxide (N2O) and oxygen (O2) with partial pressures of 425 torr and 786 torr respectively.What is the ratio of the number of moles of N2O to the number of moles... more
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