1) matter that has a uniform and definite composition. a) substances b) chemical equations c) chemical reactions d) reactants 2) substance that is present at the start of a chemical reaction. a) substances b) chemical equations c) chemical reactions d) reactants 3) the simplest form of matter that has a unique set of properties. a) substances b) chemical equations c) chemical reactions d) elements 4) a representation of a chemical reaction that displays the reactants and products with chemical formulas; multiple reactants or products are separated with a plus sign, and reactants are separated from the products with a yield arrow. a) substances b) chemical equations c) chemical reactions d) elements 5) a form of matter that has neither a definite shape nor a definite volume. a) solids b) liquids c) gases d) none 6) the substance that is present at the end of a chemical reaction. a) reactant b) product c) chemical d) substance 7) a reaction in which a substance reacts with oxygen gas, releasing energy in the form of light and heat. a) combustion reaction b) Decomposition reaction c) Single replacement reaction d) Synthesis reaction 8) a process that absorbs heat energy into the system from the surroundings. a) chemical reaction b) exothermic c) endothermic d) decomposition 9) chemical reaction that releases energy. a) chemical reaction b) exothermic c) endothermic d) decomposition 10) energy that is transferred from one object or substance to another because of a difference in temperature between them. a) heat b) kinetic energy c) potential energy d) endothermic reaction

Chemical reactions

από
Ενσωμάτωση

Κατάταξη

Οπτικό στυλ

Επιλογές

Αλλαγή προτύπου

Επαναφορά αυτόματα αποθηκευμένου: ;