Question
Which of the following international scientific
organisations approves the names of elements, symbols and unit?Solution
The International Union of Pure and Applied Chemistry (IUPAC): Â It is the world authority on chemical nomenclature and terminology, including the naming of new elements in the periodic table; on standardized methods for measurement; and on atomic weights, and many other critically evaluated data. Dr Lynn M. Soby is the Executive Director of IUPAC.
Simplify the following expression:
  (525 +175) ² - (525 – 175) ² / (525 × 175)
√(24²+285-8²-172) = ?²
120% of 25 + 80 X 2 = ?2 - 6
96% of 4500 – 34% of 650 = ?
63 × 4 = ?2 – 1620 ÷ 5
(6630 ÷ 13 + 6120 ÷ 12) ÷ (17 × 3) = ?Â
(7/5) × (3/4) × (5/9) × (6/7) × 3112 = ?
81 ÷ 0.09 × 1.4 – 1223=?
- What will come in the place of question mark (?) in the given expression?
5555 ÷ 11 ÷ 5 = 100 +? Simplify the given expression.
(1/4) of {6 4 - 28 × 15 + 13 × 16 - 12.5 of 12 2 }