13) The statement, \"In a chemical reaction, matter is neither created nor destr

Question

13) The statement, "In a chemical reaction, matter is neither created nor destroyed" is called A) the Law of Conservation of Mass B) Dalton's Atomic Theory C) the Scientific Method D) the Law of Multiple Proportions. E) the Law of Definite Proportions. 14) Identify a gas A) definite volume and definite shape B) definite volume and no definite shape C) no definite shape and definite volume D) no definite shape and no definite volume 15) Two or more substances in variable proportions, where the composition is variable throughout are A) a solution. B) a homogeneous mixture. C) a compound. D) an amorphous solid.. E) a heterogeneous mixture. 16) A chemical change A) occurs when methane gas is burned. B) occurs when paper is shredded. C) occurs when water is vaporized D) occurs when salt is dissolved in water. E) occurs when powdered lemonade is stirred into water which of the following represents a chemical property of hydrogen gas? A) It is gaseous at room temperature. B) It is less dense than air. It reacts explosively with oxygen. ) It is colorless. ) It is tasteless The outside temperature is 55 C, what is the temperature in K? 238 K B)308 K C) 95 K D) 328 K E) 63 K

Explanation / Answer

13) The statement is the law of conservation of energy.

14)A gas has no definite shape and has definite volume.

15) It is an example for heteregehetermixture.

16) A chemical change occurs when methane gas is Burnes.

CH4+2O2----> CO2+2H2O

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