Homework Help

Question: Tums react in your stomach to produce a gas. The average adult stomach expand to one liter when full. Calculate the pressure in the average adult stomach after taking 2 Tums. I really have no idea where to start on this problem. I know that chemical formula for Tums is CaCO3 and that it reacts with hydrochloric acid in the stomach which is HCl. Since, this is a carbonate-acid reaction, carbon dioxide is the gas produced, correct? Also since I'm looking for pressure and I'm given volume should I use the equation PV=nRT? If so, what would the temperature be? If I don't seem to be headed in the right direction, please help out. Any suggestions would help. Thank…

A flask is closed tightly with a rubber stopper 3.00 cm in diameter. All the air in the flask is then removed. How much force is necessary to remove the stopper from the evacuated flask? (1 atm = 1.013 x 10^5 N/m^2) I have no idea how to do this problem. I think I'm supposed to use Bernoulli's equation, but I'm not sure how exactly to use it. I also tried using P = F/A So F = P*A = 1 x 10^5 x pi x (0.03)^2 = 283 But the answer is 71.6 N.

Hi, Can you assist with the following (refer to attachment). I've sketched out how I think the particles will behave, given a -2Q particle interacts with each of the +ve particles (in turn). But my problem is; if the particles of opposite charge are touching. The attractive force become infinite. F = k (q(1). q(2) )/ r^2 r --> 0, F --> inf. Do the particles move? the problem states that they're fixed(??) Your thoughts. Any assistance will me much appreciated. Just add to that. To calculate the applied charges, I'd have to use a field equ, F = E/q, where E is the electric field as a result of the other particles acting on +3Q, But how do I (or would you) for…

Is it possible to show that coriander has antioxidant properties in a lively manner (eg.like using RBCS) apart from standard assays like comet assay etc.,

My teacher has given this question that nobody in the class seems to understand. Can anybody point me in the right direction? Q. You wish to know whether the cDNA you have isolated and sequenced is the product of a unique gene or is made by a gene that is a member of a family of related genes. To address this questions, you digest cell DNA with a restriction nuclease that cleaves the genomic DNA but not the cDNA, separate the fragments by gel electrophoresis, and visualize bands using radioactive cDNA as a probe. The Southern blot shows two bands, one of which hybridizes more strongly to the probe substance than the other. You interpret the stronger hybridizi…

When tripling the volume of a given weight of gas at 27 C, keeping the pressure constant, the temperature must be raised to? I used V1/T1 = V2/T2 and set V1 to 1 L 1/27 = 3/T2 T2 = 81 C. But the answer says it's 627 C. Is it wrong?

arrachment? Answe to A is that it is dominant! But how do i do the rest?

The pairwise map distances for four linked genes are as follows: A-B = 14 m.u., B-C = 30 m.u., C-D = 34 m.u., B-D = 4 m.u., A-D = 18 m.u., A-C = 16 m.u. What is the order of these four genes? Choose one of the alternatives below. A) ABCD B) ADBC C) CBDA D) BADC E) CADB F) BACD G) DABC H) DBAC I) BDCA J) DBCA K) None of the above

does anyone know this?

please help with following that is in the attachment

The pairwise map distances for four linked genes are as follows: A-B = 14 m.u., B-C = 30 m.u., C-D = 34 m.u., B-D = 4 m.u., A-D = 18 m.u., A-C = 16 m.u. What is the order of these four genes? Choose one of the alternatives below. A) ABCD B) ADBC C) CBDA D) BADC E) CADB F) BACD G) DABC H) DBAC I) BDCA J) DBCA K) None of the above

A'B'C'+A'BC'+A'BC+ABC How to simplify the above expression.... Kindly help me...

When I substitute z=x+yi, I can't seem to work out the answer. Anyone knows how to solve this ? Thanks

Q1: If a person breathes at the rate of 15 respirations per minute, and each respiration involves 0.500 dm^3 of air, calculate the total mass of air breathed in one hour at 280K and 1 arm pressure. Average molar mass of air is 28.8g/mol. Q2: A 600cm^3 gas sample contains only methane, CH4, and ethane,H2C_CH2 . Half of the sample was burned in oxygen and found to produce 486.8cm^3 of dry carbon dioxide at 1atm, 300K. The water produced during combustion had been removed. The remainder of the sample was found to require 187.8cm^3 of hydrogen at 1 arm and 300K to convert the ethene to ethane C2H6. A) determine the molar fraction of methane in the orginal sa…

If anyone could just help point me in the right direction, I've been at this for many hours and I can't figure out how! Thank-you! Propose a mechanism for the synthesis of Phthalic acid. Taking into account that you have the following organic reactants and any inorganic reactants, gases and material that you need. We have only learned the following reactions so I think I'll have to stick to these for the midterm: Electrophilic addition reactions (hydrogen halides, hydrogen bromide in the presence of peroxide, addition of halogen-Cl2 or Br2, Acid catalyzed addition of h20 and alcohols, oxymercuration-reduction, alkoxymercuration-reduction, hydroboration-oxidation, an…

[MATH]\frac{3.87^3+20}{3.87^3-20}[/MATH] I want solve the above using logarithm. I don't know how to solve it using logarithm because I can't deal with this: [MATH]\frac{10^{(0.5877)3}+10^{1.3010}}{10^{(0.5877)3}-10^{1.3010}}[/MATH] If this is given: [MATH]\frac{3.87^3\times20}{3.87^3\times20}[/MATH] It would have been easiar for me to solve if I add and subtract all the powers that has base 10. Please I need help.

My assignment asks me to "Write the Boolean equations for an 3 to 8 decoder." Now from what I think I understand, you'll get something like this http://en.wikipedia.org/wiki/Decoder#mediaviewer/File:Decoder_Example.svg. Are the minterms just the boolean equations? Because I don't really see how else to make boolean equations.

Hi All, I found this problem, The sum of p, q, r terms of an Arithmetic Progression, are P, Q, R respectively: show that [latex] \frac{P (q - r )}{p} + \frac{Q (r - p )}{q} + \frac{R (p - q)}{r} = 0 [/latex] My thoughts on how to start the problem is; if [latex] S_{n} = \frac{a}{2} (n + (n-1)d ) [/latex] then the sum of say 'p' terms, would be [latex] P = S_{p} = \frac{a}{2} (p + (p-1)d ) [/latex] Therefore; [latex] Q = S_{q} = \frac{a}{2} (q + (q-1)d ) [/latex] [latex] R = S_{r} = \frac{a}{2} (r + (r-1)d ) [/latex] If I used the following series, to simplify the above P, Q & R series; [latex] S_{n} = 1 + 2 + 3 ... + n, [/latex] then [latex] …

I need help with a problem in my CS420 Data Mining course. The question asks to use the Relief Algorithm for feature selection. The algorithm is as follows: W(A­i)new = W(Ai)old – (diff(X[Ai], H[Ai])2 + diff(X[Ai], M[Ai])2)/m where W(Ai) is the quality score for all feature Ai, X is a randomly selected sample, H is nearest Hit, M is nearest Miss, and m is the number of randomly selected training samples. Any help with this problem would be greatly appreciated. Thanks!

So basically I've been out sick for the past week and have no idea what is going on in my Honors Gen Chem II class. :/ I have a basic understanding of kinetics, but the class moves so fast that I feel I am very behind from missing two periods. The questions seem straightforward enough that they can be solved with the information I have provided; however, I am completely lost. http://njit2.mrooms.net/file.php/4799/Images_Chem_126_RH_/Z15-31.gif I just have a few questions, based off of the above image link: 1.The reaction below was studied by performing two experiments. NO(g) + O3(g) → NO2(g) + O2(g) In the first experiment (results shown in left table) the rate …

Is this a binomial distribution question ? I need help for this. Can anyone explain ? Thank you in advance !

A child runs in a circular path with constant speed. Which one of the following quantities is constant and non-zero? A. Linear velocity B. Angular velocity C. Centripetal acceleration D. Angular acceleration E. Total acceleration I thought none of them would be constant since the direction of the vectors would always be changing when you move in a circle. But since I had to pick an answer, I thought it might be between linear velocity and angular velocity and picked linear velocity since there is a constant speed. But the answer is angular velocity. Why?

A uniform meter stick of mass 0.24 kg can be balance by a mass of 2.16 kg at the 100 cm mark if the fulcrum is placed at the point in cm ___. So the mass on one side is just the mass of the stick (0.24 kg) and the other side is (2.16 kg + .24 kg = 2.4 kg) So the torques have to be equal So on one side, it's 0.24 kg * 10 m/s^2 * d And the other is 2.4 kg * 10 m/s^2 * (100-d) So I set them equal to each other and got 26.4 d = 2400 d = 90 cm. But the answer is apparently 95 cm. why?

Question in the title?Like forum sites to ask science and math questions?

The time has come for me to propose my final year project. I can do a literature review or design a practical. The two subjects I am interested in are: Quantum Entanglement and Quantum Information Magnetic Imaging in Medicine Although I am interested I appreciate that others may know more about these fields. I'm also acknowledging that simple interest isn't going to cut it in terms of getting a good grade. Realistic projects are a must. Many thanks in advance