In 1923, chemists Johannes Nicolaus Brønsted and Thomas Martin Lowry independently developed definitions of acids and bases based on the... View Article
Optical axis of a lens is an imaginary straight line which passes through the geometrical centre of a lens joining the two centres of curvature... View Article
The given compound is an ionic compound where the compound contains a metal sodium and a non-metal oxygen. Sodium is located in group 1 of the... View Article
When two elements are combined through a chemical reaction then a compound forms. For example water is a compound formed from the combination of... View Article
A prime number is a whole number with exactly two integral divisors, 1 and itself. Any number greater than 2 which is a multiple of 2 is not a... View Article
The LCM of 9 and 12 is the smallest positive integer that divides the numbers 9 and 12 without a remainder. The prime factorization of 9 is: 3... View Article
Step1: Write 0.04 as 0.04/1 Step 2: Multiply both numerator and denominator by 10 for every number after the decimal point 0.04 × 100/1... View Article
22 is a composite number. Factors of 22: 1, 2, 11, 22. Prime factorization: 22 = 2 x 11. 22 is an even number, therefore it is divisible by 2, so... View Article
The number of protons in Aluminium is 13. The 27 means the atomic mass is 27 . The number of protons plus the number of neutrons is 27. That... View Article
In PF5, Phosphorous has 15 electrons and Fluorine has 9 electrons. Phosphorous has 3 unpaired electrons available for bonding, which is not... View Article
The lowest common multiple of 2 numbers can be calculated as: lcm (a x b)=a x b/gcd(a,b) The numbers 5 and 7 are prime numbers their greatest... View Article
Hydrogen is a gas at room temperature. Elemental hydrogen (H, element 1), nitrogen (N, element 7), oxygen (O, element 8), fluorine (F, element... View Article
Usually arteries do not have valves. But two arteries originating from right and left ventricles have valves to prevent backflow of blood. These... View Article
Let us assume that the surface area of the earth is 30 square meters (just an assumption so that we can divide easily by 2, 3, 5.)Since the ratio... View Article
Answer: A chemical process where any fuel has a reaction with air (oxidant) to produce heat energy is called combustion. The exothermic reaction... View Article
A polygon is a plane figure that is bounded by a finite chain of straight line segments closing in a loop to form a closed chain or circuit. So,... View Article
The balanced chemical equation is: Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g) The reaction between magnesium and hydrochloric acid combine to form... View Article
The Least common multiple or lowest common denominator (lcd) can be calculated in two-way; with the LCM formula calculation of the greatest... View Article
The nervous system has two main parts: The central nervous system is made up of the brain and spinal cord. The peripheral nervous system is made... View Article
