Three-fourth of a reaction is completed in 32 minutes. What is the half life period of this reaction ?
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There is a circular path around a sports field. Preeti takes 18 minutes to drive one round of the field, while Suman takes 12 minutes for the same. .
Solution: They will be meet again after LCM of both values at the starting point. To get the LCM we have to factorize the number. 18 = 2 × 3 × 3 12...
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Three bells toll at intervals of 9, 12, 15 minutes respectively. If they start tolling together, after what time they next toll together?
Solution: 9 = 3 x 3 = 32 12 = 2 x 2 x 3 = 22 x 3 15 = 3 x 5 => LCM (9, 12, 15) = 22 x 32 x 5 = 180 => the bells will toll together...
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After ve half-life periods for a rst order reaction, what fraction of reactant remains ? A
your the answer 1/32
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For a rst order reaction time taken for half of the reaction to complete is t 1 and 3/4 of the reaction
t 2 = 2t 1 because for 3/4th of the reaction to complete time required is equal to two half lives
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A first order reaction is 75% completed in 60 min. Find the half life of this reaction
The answer is 30 mins
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Three-fourth of a reaction is completed in 32 minutes. What is the half life
The answer is 16 minutes.
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A first order reaction is 75% completed in 60 min. Find the half life of this reaction.
The answer is 30 mins.
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The half life period of a FIrst order reaction is 60 min. What % will be left after 240 mins. ?
The answer is 6.25%
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A car moves with a speed of 40 km/h for 15 minutes and then with a speed of 60 km/h for the next 15 minutes. The total distance covered by the car is:
(ii) 25 km------------------- Solution: Case I: Speed = 40 km/h Time = 15 min = 15/60 hour Distance = Speed × Time = 40×15/60=10 km Case II: Speed = 60 km/h Time = 15 min = 15/60 hour Distance...
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Calculate the physical fitness index using short formula for a 12 year old boy having completed Harvard Step Test for a duration of 3 minutes
The athlete’s fitness index score is calculated with the help of following formula. Fitness index score = (100 × test duration in seconds) divided by (2 × sums of heartbeats...
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