Recent content by nothing123

Which of the following is a redox reaction? A. TiCl4(g) + 2 Mg(l) D Ti(s) + 2 MgCl2(l) B. NH3(g) + CO2(g) + H2O(l) NH4HCO3(aq) C. NaCl(s) + NaHSO4(s) D HCl(g) + Na2SO4(s) D. NaOH(aq) + H3PO4(aq) NaH2PO4(aq) + H2O(l) E. None of the above Is it A? Also another q. The primary reason for...

In the reaction of carbon dioxide and water to form carbonic acid, does water act as a lewis base because it donates a pair of electrons to carbon dioxide or does carbon dioxide act as a Bronsted-Lowry base because it accepts a proton from water? Thanks.

But doesn't the fact that it's still approaching you make the pitch seem like its increasing regardless of acceleration?

These are the answer choices to the above question; a) t3<t2<t1 b) t2<t3<t1 c) t2<t1=t3 d) t2=t3<t1

Thanks.

An ideal fluid flows through a pipe with radius R with flow speed v. If the pipe splits up into three separate paths, each with radius (R/2), what is the flow speed through each of the paths? Would we just use the flow rate equation giving a flow speed of 4v in each of the paths? Does the...

Whoops, you're right. I have another question: A mass m starting at point A is projected with the same initial horizontal velocity v0 along each of the three tracks shown here (with negligible friction) sufficient in each case to allow the mass to reach the end of the track at point B...

Very quick question: A uniform meter stick held by one end is swung in an arc and released when the person’s arm is horizontal, so that it moves initially away from the ground. About which point will it rotate as it flies before striking the ground? Is it the 50cm mark since once released...

For an weak acid/strong base titration, the pH at equivalence can be estimated by pH = pKa + pHtitrant/2. Can someone explain where that equation comes from? Thanks.

The thing is though, A and B are not part of the rate-determining step so technically even increasing either of their concentrations should not affect the rate 9ince they are zero order no?

Hi, So if we have a two-step mechanism that goes something like this: 1) A + B -> C 2) C -> D ------------- A + B -> D and the second step is the slow step, the reaction rate would be r = k2[C] correct? Well, seeing as reactants A and B are zero order, varying their concentrations...

sorry posted on a friends account.

its from an MCAT question that asked about the relationship between intensity and f-stop of a camera. i just replaced the variables with y and x. and it seems plausible that if x increased by the square root of 2, y would decrease by 2 would describe a relationship where y = 1/x^2. that is, if x...

Hi, Just having a little trouble understanding the concept of standard cell potential...what is it exactly? I understand that it is compared to a reference potential of 0 for the reaction 2H+ + 2e- -> H2(g). But what does it mean when a given reaction has positive potential (other than the fact...

Hi, Sorry if this sounds blatantly obvious but I just wanted to clarify how a battery works. From my understanding, there are electrochemical reactions occurring within a battery that creates electrons on one end of the battery and thus a negative end. Subsequently, the other end is positive...