The density of copper is 8.94g/cm3 at 20°C and 8.91g/cm3 at 60°C. This density decrease is the result of which of the following ? State by inserting true or false and give an explanation.
a) the metal expand
b) the metal contrast
c) the mass of the metal increase
d) the mass
of the metal decrease
Answers: 3
Chemistry, 22.06.2019 16:50, Pookiev
Which of the following is an indication that a substance has undergone a chemical change? a. no new product has been formed. b. the color of the substance has not changed. c. the original constitute has not changed. d. the molecular structure has changed.
Answers: 1
Chemistry, 23.06.2019 02:00, FailingstudentXD
Calculate the molarity of each aqueous solution: a. 78.0 ml of 0.240 m naoh diluted to 0.250 l with water b. 38.5 ml of 1.2 m hno3 diluted to 0.130 l with water
Answers: 1
Chemistry, 23.06.2019 05:00, jjoyner
Question 5 match each term to its description. match term definition excess reactant a) reactant that can produce a lesser amount of the product limiting reactant b) reactant that can produce more of the product theoretical yield c) amount of product predicted to be produced by the given reactants
Answers: 2
The density of copper is 8.94g/cm3 at 20°C and 8.91g/cm3 at 60°C. This density decrease is the resul...
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