Answer is (b)
2,3,1 is the stoichiometry
The values in front of the elements are the stoichiometric values
(Since Al2Br6 has no value in front, it's considered 1)
Answer:
where is the question i can't see it
Answer:
A. False.
Every substance contains the same number of molecules i.e 6.02x10^23 molecules
B. False.
Mass conc. = number mole x molar Mass
Mass conc. of 1mole of N2 = 1 x 28 = 28g
Mass conc. of 1mol of Ar = 1 x 40 = 40g
The mass of 1mole of Ar is greater than the mass of 1mole of N2
C. False.
Molar Mass of N2 = 2x14 = 28g/mol
Molar Mass of Ar = 40g/mol
The molar mass of Ar is greater than that of N2.
Explanation:
f(x) = |x-4| + 2
|a| ≥ 0 ∀ a∈R
That means the minim of the function will be when |x-4|=0 ⇒ x = 4
f(4) = |4-4|+2
f(4) = 2 ⇒ M(4,2) - minim point
<em>We notice that the function f is ascending for x ∈ [4,+∞) and is descending for x ∈ (-∞,4]</em>
Because the function is linear,the sketch of the graph will be 2 lines with the intersection in the point M(4,2) (in our case).
Let's find f(0) = |0-4|+2 = 4+2 = 6 ⇒ N (0,6) is the intersection of the function with Oy axis. (now we can sketch the graph only for x ∈(-∞,4] )
Now let's calculate the function for a value bigger than 4 : for example f(5) = 3 ⇒ P (5,3) ∈ Gf
So you can see the graph in the picture.Have a nice day :)
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