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A 400 mL buffer solution was prepared by reacting sodium acetate, CH3COONa, with 1.00 M acetic acid, CH3COOH, with a pH of 4.56 Calculate the mass of CH3COONa required to prepare the solution. Ka CH3COOH= 1.75 x 10-5
State if the following statement is true or false. Give reasons for your answers in the form of a short proof or a counterexample.
(√2, 1, ½) E Q X Z X R.
State is the following statement is true or false. Give reasons for your answers in the form of a short proof or a counterexample.
The domain of the function f defined by f(x)= √(3-x)/(x-2) is R-{2}.
If f(x)= 2|x-1| and g(x)=3x-10, then fog(1)=12
A solution of Ba(OH)2 was standardized against 0.1016 g of primary standard benzoic acid C6H5COOH Calculate the concentration of if the end point was 20.89 mL.
given a list of M numbers and a positive integer N, print the sum of numbers whose position in the list is divisible by N .consider that the position of numbers range from 1 to N
INPUT:
the first line contains two space-separated integers N, M
the second line contain M space-separated integers.
output:
print a single integer representing the required sum
explanation:
Sample Output1
Given N=1 , M=7
and the number list = [4,8,6,6,7,9,3]
As every position is divisible by 1,
4+8+6+6+7+9+3=43
so the output should be 43
Write z1=(√3+i) and z2=(1−i) in trigonometric form. Then the argument of the quotient (z1)/(z2)is given by
Five items was taken from the output of factory. The length and weight of 5 items are given
below.
Length (meter): 5 6 7 9 12
Weight (KG): 13 15 18 19 20
State which of the two characteristics of two items is more variable?
Determine the molecular formula of alaxin C5H8nO5 if it's relative molecular Mass is 284
The kinetic energy of a car is 8 ´ 106 J as it travels along a horizontal road. How much power is required to stop the car in 10 s?
