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Questions and answers by
Shahab Mirza
Questions (19)
The problem statement, all variables and given/known data
A body is thrown upward and remains in air for 10 seconds , the initial
1 answer
489 views
A car travelling with constant acceleration increases its speed from 10 m/s to 50 m/s over a distance of 60 m . how long does
1 answer
2,578 views
The Speed of train is reduced from 60km/h at the same time as it travels a distance of 450 m, If the reduction in speed is
4 answers
6,197 views
help.
A rescue helicopter drops a package of emergency ration to a stranded party on the ground. If the helicopter is traveling
4 answers
8,617 views
why hcl dissociates more fastly than ether, reason ?
0 answers
370 views
CH ≡ CH + 2AgNO3 → AgC ≡ CAg + 2HNO3 represents which property of acetylene.
A. Basic B Acidic. √ answer is acidic, now i
4 answers
983 views
AgCl <------> Ag+ + Cl- , the Ksp for the reaction will be . Ksp = [Ag+] [Cl-]
how?
2 answers
771 views
A block of mass 50 kg is pulled on a frictionless floor by F=210N directed to 30angle horizontally, If the block moves 3m, find
0 answers
1,281 views
If we take 2.2 grams of CO2, 6.02 X 1021 atomes of nitrogen and 0.03 gram atoms of sulphar , then the molar ratio of C, N, and O
9 answers
5,230 views
Equal weights of methane and hydrogen are mixed in an empty container at 25 C. the fraction of total pressure exerted by the
7 answers
2,407 views
Among the following electrons, which has highest energy?
a. n = 3, l = 2, m = 0, s = + 1/2 b. n = 4, l = 0. m= 0 , s = - 1/s
5 answers
428 views
Nitrogen dioxide decomposes on heating according to the following equation
2NO2 (g) ↔ 2NO (g) + O2 (g) When 4 mole of nitrogen
7 answers
6,022 views
This type of question come in our exams usually that.
If the Reaction P+Q → R + S is described as being of zero order with
2 answers
563 views
The energy of an X-RAY quantum of wavelength 1.0 X 10^-10 m is.
its answer is 1.99 X 10^ -15, but i don't know how to solve it ,
3 answers
2,391 views
If A = 3i + 6j -2k, then unit vector parallel to A will be
answer is 3/7i + 6/7j - 2/7k solve it please, because i don't know how
4 answers
1,312 views
A= 2i + 3j - k, B= 4i + 2j - 2k, Find a vector x parallel to A but has magnitude of B ?
Answer is √12/7 (2i+3j) - K solve it ,
2 answers
1,019 views
A constant force acting on body mass 5 kg changes its speed from 2 m/s to 7 m/s , the direction of motion remains unchanged,
2 answers
840 views
An electric rod of 2000 watts rating boils a certain quantity if water in 10 minutes, the heat is generated for boiling this
2 answers
2,168 views
A box of mass m = 6kg slides with speed v = 4 m/s across a frictionless floor. It suddenly explodes into two pieces. One piece,
4 answers
4,766 views
Answers (19)
@DrBob222 , thanks for reply sir, then what is proper way to describie it
@bobpursley, i know it sir but , someone told me that its hno3 in equation so its acidic whats that means?
@bobpurlsey , my question is 1st one not second one , help
@DrBob222 , Thanks sir, but I still cant understand , help me out, see , 2.2g X 12/44 = 0.6 moles of CO2, so how to calculate Moles of N and O ?
@DrBob222 , thanks for reply, thanks sir
@DrBob222 , someone solved it like this way but i was also wondering that how he got 1/9 :/ , these questions come in our MCAT , and have weird testing pattern, even many of students fail to answer such deep questions , we are given only 1 min to solve
@bobpursley , yeah i am preparing for mcat and only 10 days are left, i have dozens of books but i am still confused in chemistry , specially organic chemistry and physical chemistry , time is also short , any tip?
@bobpursley , thanks , but what if we solve it like this bro. = ch4 has 16 molar mass, h2 has 2 molar mass, 1 mol ch4 contains 8 mol H2 . = moles of ch4 / moles of h2 + moles of ch4 = 1 / 8 + 1 = 1/9 answer in theoretical form. is it okay?
@bobpursley . THanks , but tell me , what will happen if we will choose answer which has +1/2 . will this technique work for quick solution help?
@bobpursley , Thanks alot i got it . Thanks Sir
@bobpursley , thanks but i have very little time left for exams so summarize to me in simple way if ur wish bro, tell me how to solve such questions quickly?
@bobpursley , thanks for solution, but i still don't get it bro, what we did to 4 mole of N ? and 0.8 mol of O? help and how to write answer in this form 1.6^2 X 0.8 / 2.4^2 ?
@ganonTEK thanks SIr, i was just confusing frequency so i got 3 X 10^ 8 frequency and then multiplied it by planks constant and got exact answer , thanks
@GanonTEK , Thanks alot, I got how it works bro, btw your physics is nice and your concepts are good in physics , THanks sir
Thanks sir, I understand that information is lacking but I don't know why they have given such high level question for MCAT admission test :/ , anyway thanks
@GanonTEK thanks bro , it helped me alot in studying my MCAT but still i don't understand that if there is -ve sign then why we have added all three? and why divided each term by 7? thanks
I FIGURED IT OUT SORRY FOR PROBLEM, Solution: speed changes from 2 to 7 , so 7-2 = 5/time = 5/10 = 0.5 X 5 = 2.5 Answers
Thanks Sir, It helped me solve my MCAT questions
@damon , thanks sir
