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A constant force of 245 N is applied at a 48.2° angle to a mass of 62.1 kg as shown below. If the mass moves at a constant speed of 3.28 ms–1, determine its coefficient of dynamic friction.
What is the probability that the 30 randomly selected student will complete the test in 53 minutes?
computethe volume of CO2 produced at 65°C and 2.3 atm when 1.7 g of O2 is used up in the reaction:
C3H8 (s) + 5O2 (g) ——4 H2O(g) + 3H2(g)
A rock is thrown from the top of a 36 m high cliff with an initial speed of 12 ms–1 at an angle of 52° to the horizon. How long will it take the rock to reach the bottom of the cliff?
compute for the volume of Hydrogen produced at 55°C and 1.5 atm when 3.5 g of AI is used up in the reaction:
2 AI(s)+6HCI (aq) ——2 AICI2 (aq) + 3H2(g)
If 3.6 L of HF decomposed at 65°C and 1.35 atm, what mass of SnF2 will be produced given the reaction:
Sn (s)+2 HF (g)———SnF2 (s)+H2 (g)
The probability that Roy attends a practice session before a match is 95%. If he attends, the probability that he is chosen for the team which plays is 98%. If he does not attend, there is a 75% chance that he will be chosen for the team
a)Construct a well labeled tree diagram to represent all the possible outcomes. [4]
b) What is the probability that Roy:
i) attends practice and is chosen? [1]
ii) does not attend practice and is not chosen? [1]
iii) does not attend practice? [1]
iv) is chosen? [2]
If 37 grams of methanol is produced from the reaction of 60 grams of CO and 6 grams of H2.Determine the reagent,excess reagent, percent yield and theoretical yield of reaction
The intelligence quotients (IQs) of 16 students from one area of a city showed a mean of 107 and a standard deviation of 10, while the IQs of 14 students from another area of the city showed a mean of 112 and a standard deviation of 8. What would be the ‘ t ’ value to test whether there is a significant difference between the IQs of the two groups at significance level 0.01?
a. 2.56
b. 1.45
c. 3.45
d. 2.22
Billie combined 200 grams of N2 and 100 grams H2 to produce 230 grams of ammonia. Determines the limiting reagent, excess reagent, percent yield and theoretical yield of the reaction. show the steps on how you came up with your answer
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