We are looking for the value of the second integer, so let's mark it as X.
Then three consecutive integers are : (x-1) , x , (x+1)
The sum of the first and the third integers (X-1) + (X+1)
Five less than three times the second integer 3X - 5
Now we can write an equation and solve it for X
(X-1)+(X+1)= 3X - 5 simplifying left part
2X = 3X -5 subtract 2X from both sides
0 = X-5
X=5
SO THREE CONSECUTIVE INTEGERS ARE 4, 5, 6
Answer:
B. CH₅N
Explanation:
The combustion reaction of a compound CₐHₓNₙ with O₂ is:
CₐHₓNₙ + O₂ → a CO₂ + X/2 H₂O + n NO₂
Where 1 mole of CₐHₓNₙ with an excess of O₂ produce a moles of CO₂, X/2 moles of H₂O and n moles of NO₂
Thus, you need to convert the mass of CO₂ and H₂O to moles to find the C:H ratio and determine a possible empirical formula thus:
Moles CO₂ (Molar mass 44g/mol):
44g ₓ (1mol / 44g) = 1 mole CO₂ = 1 mole C
Mole of H₂O (Molar mass 18g/mol):
45g ₓ (1 mol / 18g) = 2.5 moles H₂O = 5 moles H
Thus, in the compound you have 5 moles of H per mole of C, and a possible empirical formula is:
B. CH₅N
The only structure that meet this C:H ratio
Answer:
The answer for "which one is bridge animal?" is 4. I think it is i and ii not ii and ii.
The answer for the homologous organ is forelimb of seal.
The vestigial organ is appendix.
Answer:
54
Explanation:
First write the list of numbers which the tens number is one less then ones place.(21,32,43,54,65,76,87,98). Remember this list then add the digits together. If you know your multiplication, the first 5 should be easy to solve so multiple the sum you received from adding the numbers by 6 until you get to one with the same starting number
(21)2+1= 3 x 6= 18
(32)3+2= 5 x 6= 30
(43)4+3= 7 x 6= 42
(54)5+4= 9 x 6= 54
(65)6+5=11
(76)7+6=13
(87)8+7= 15
(98)9+8 = 17