An exothermic reaction is one that releases thermal energy to the surroundings, usually resulting in a temperature rise. Example: Combustion, respiration, or neutralization.
What is the difference between an element and a compound? Answer: An element is a substance that consists of only one type of atom, while a compound is a substance formed from two or more different elements. igcse chemistry questions and answers pdf
How do you calculate the number of moles of a substance? Answer: The number of moles can be calculated using the formula: moles = mass / molar mass. An exothermic reaction is one that releases thermal
Using the equation: $Mg + 2HCl \rightarrow MgCl_2 + H_2$ If 2.4g of Magnesium reacts with excess hydrochloric acid, what mass of Hydrogen gas is produced? ($Mg = 24, H = 1$) H = 1$)