WHAT ARE THE POSSIBLE OXIDATION NUMBERS OF AN ELEMENT IF ITS ATOMIC NUMBER IS 17
A. -1 and 7 ✓ B. -1 and 6 C. -3 and 5 D. -2 and 6 The answer to the question is: A. -1 and 7 The possible oxidation numbers of an element can be determined by considering its position in the…
THE NUMBER OF MAKKAN SOLDIERS THAT TOOK PART IN THE BATTLE OF UHUD WAS
A. 2000 B. 3000 ✓ C. 4000 D. 1000 The answer to the question is: B. 3000 The number of Makkan soldiers that took part in the Battle of Uhud was estimated to be around 3,000. The Battle of Uhud took place…
THE NUMBER OF HOLES IN AN INTRINSIC SEMICONDUCTOR
A. is equal to the number of free electrons ✓ B. is less than the number of free electrons C. is not equal to the number of free electrons D. is greater than the number of free electrons The answer to the question…
CALCULATE THE NUMBER OF MOLECULES IN 2.8g OF NITROGEN GAS
To calculate the number of molecules in 2.8g of nitrogen gas, we must first understand the relationship between mass and the number of particles (atoms or molecules) in a substance. The concept of this relationship is known as the molar…
PYRAMID OF NUMBER
Pyramid of number refers to the number of individual organisms at each trophic level which decreases progressively from the first to the last trophic level in a food chain. Pyramid is a diagrammatic representation of food chain in which producers…
OCTANE NUMBER
Octane number (octane rating) is a measure of the performance of petrol in the engine and the rating depends on the percentage composition of branched chain (iso-octane) to straight chain (n – pentane) hydrocarbons in the fuel. Petrol consists of…