A SOLUTION CONTAINS 20g OF SOLUTE IN 180g OF SOLVENT. IF THE SOLVENT IS WATER, WHAT IS THE CONCENTRATION OF THE SOLUTION IN TERMS OF MASS BY MASS PERCENTAGE
A. 11.% B. 22.2% C. 10% ✓ D. 20% The answer to the question is: C. 10% The mass by mass percentage of a solution is calculated by dividing the mass of the solute by the total mass of the solution (solute…
WHAT IS THE COEFFICIENT OF STATIC FRICTION BETWEEN A LOAD OF MASS 2KG AND A HORIZONTAL SURFACE, IF THE LIMITING FRICTIONAL FORCE IS 10N
A. 0.2 B. 0.5 ✓ C. 2 D. 5 E. 8 The answer to the question is: B. 0.5 The coefficient of static friction can be calculated using the formula: coefficient of static friction (μs) = limiting frictional force (Ff) / normal force…
A CAR OF MASS 800KG ATTAINS A SPEED OF 25M/S IN 20 SECS. THE POWER DEVELOPED IN THE ENGINE IS
A. 1.25 x 104 W B. 2.50 x 104 W ✓ C. 1.25 x 106W D. 2.50 x 106 W The answer to the question is: B. 2.50 x 104 W To calculate the power developed in the engine of a car, we…
A SALT WHICH LOSES MASS WHEN EXPOSED TO AIR IS
A. hygroscopic B. deliquescent C. efflorescent ✓ D. fluorescent E. effervescent The answer to the question is: C. efflorescent Efflorescence is a phenomenon associated with certain crystalline substances, particularly salts, which involves the loss of water of crystallization to the atmosphere upon exposure to air.…
IF 1.5 MOLES OF OXYGEN REACTS WITH SULPHUR (IV) OXIDE, CALCULATE THE MASS OF TETRAOXOSULPHATE(VI) ACID PRODUCED
To calculate the mass of tetraoxosulfate (VI) acid produced when 1.5 moles of oxygen reacts with sulfur (IV) oxide, we need to determine the balanced chemical equation for the reaction first. The balanced equation is as follows: 2SO2 + O2…
EQUILIBRIUM LAW OF MASS ACTION
Introduction Equilibrium refers to a state in which the rates of the forward and reverse reactions are equal, and there is no net change in the concentrations of the reactants and products. In other words, the system is in balance.…
EVERYTHING YOU NEED TO KNOW ABOUT MASS AND WEIGHT
Introduction Mass and weight are often used interchangeably in everyday language, but they have distinct meanings in physics. Mass is a measure of the amount of matter in an object. It is a scalar quantity that is usually measured in…
MASS MEDIA
It is the totality of means of communication within a society, state, etc ., such as television, Film production, radio, newspaper, magazine and internet including news-letter in which messages, news and information get across the population, government and it’s agencies.…