CHEE (Chemistry)

CheE Chemical Changes and Chemical Reactions atom - correct answerthe smallest particle of an element element - correct answerthe simplest form of a substance - made of identical atoms, always found on the periodic table molecule - correct answertwo or more atoms bonded together, if atoms are of different elements, it is the smallest particle of a compound compound - correct answera pure substance made from atoms of two or more different elements chemically combined/bonded together...

CheE Chemical Reactions- 11.27 chemical change - correct answerA change in matter that produces one or more new substances sub - correct answerunder, below Co- - correct answerwith, together super- - correct answerabove, beyond Reactant - correct answerA chemical substance that is present at the start of a chemical reaction product - correct answera substance that forms in a chemical reaction

CheE3.01 Writing and Balancing Chemical Equations Reactant - correct answerA chemical substance that is present at the start of a chemical reaction product - correct answerA substance produced in a chemical reaction balanced equation - correct answera chemical equation in which mass is conserved; each side of the equation has the same number of atoms of each element chemical reaction - correct answerthe process by which one or more substances change to produce one or more diffe...

CHeE Unit 3: Conservation of Mass endothermic reaction - correct answerA reaction that ABSORBS energy in the form of heat exothermic reaction - correct answera chemical reaction in which heat is released to the surroundings conservation of mass - correct answerthe principle stating that matter is not created or destroyed during a chemical reaction Mass - correct answerthe total number of particles in a system Molecule - correct answerA group of atoms bonded together Coefficie...

CHEE Chemical Engineering Unit 1 Vocabulary - #1-16 atom - correct answerthe smallest unit of matter, makes up a molecule molecule - correct answeratoms bonded together to make a chemical bond - correct answerholds atoms together in a molecule, has energy matter - correct answersomething that has mass/weight energy - correct answerthe ability to do work, has no mass reaction - correct answerwhen atoms and bonds rearrange to make new chemicals products - correct answerwhat ...

CHEE : Vocab - Physical vs Chemical Changes Physical Change - correct answerA change in matter that does NOT change the chemical properties; no new substance is formed Chemical Change/Chemical Reaction - correct answerAtoms are rearranged to form brand new substances with new chemical and physical properties Reactants - correct answerA substance on the left side of a chemical reaction arrow; the "before" part of a chemical reaction Products - correct answerA substance on the righ...

Past Boards Chemical engineering C - correct answer*10 Mg of a solution* containing *0.3 kg Na2CO3/kg solution* is cooled slowly to 293 K to form crystals of Na2C03.lOHzO. *What is the yield of crystals* if the solubility of Na2C03 at 293 K is 21.5 kg/l00 kg water and during cooling 3 per cent of the original solution is lost by evaporation *(a) yield of crystals* (b) Mass ratio of decahydrate to anhydrous (c) amount of mother liquor (d) Weight of remaining solvent A. 6356 kg B. 563...

CHEE Chemical Reactions Vocabulary chemical reaction - correct answerprocess that changes, or transforms, one set of chemicals into another set of chemicals Reactants - correct answerA starting material in a chemical reaction Products - correct answerthe substances that are formed by the chemical change yield - correct answerthe act of producing products in a chemical reaction precipitate - correct answerA solid that forms from a solution during a chemical reaction.

CHEE 2331 Balancing chemical equations balanced - correct answer__CaO + __H₂O → __Ca(OH)₂ 2, 1, 2 - correct answer__Na + __F₂ → __NaF 2, 1, 2, 1 - correct answer__Na + __MgF₂ → __NaF + __Mg 4, 3, 2 - correct answer__Fe +__O₂ → __Fe₂O₃ 1, 3, 1, 2 - correct answer__CS₂ + __O₂ → __CO₂ + __SO₂ 1,2,1,2 - correct answerComplete combustion of methane gas. __CH₄ + __O₂ → __CO₂ + __H₂O reactant - correct answerThe elements or compounds whi...

CHEE 2331 Balancing chemical equations balanced - correct answer__CaO + __H₂O → __Ca(OH)₂ 2, 1, 2 - correct answer__Na + __F₂ → __NaF 2, 1, 2, 1 - correct answer__Na + __MgF₂ → __NaF + __Mg 4, 3, 2 - correct answer__Fe +__O₂ → __Fe₂O₃ 1, 3, 1, 2 - correct answer__CS₂ + __O₂ → __CO₂ + __SO₂ 1,2,1,2 - correct answerComplete combustion of methane gas. __CH₄ + __O₂ → __CO₂ + __H₂O reactant - correct answerThe elements or compounds whi...