State the law of conservation of matter. In light of this law, what would you pr

Question

State the law of conservation of matter. In light of this law, what would you predict the results of the two weighings in reaction 8 to be? Classify each of the following as a physical property (PP) or a chemical property (CP). a. Silver conducts an electric current. b. Hydrogen burns but does not support combustion. c. Mercury had a density of 13.6 g/mL. d. Sugar dissolves in a hot cup of tea. (Think about this one. Is the sweet taste of sugar still there?) e. Diesel fuel burns in a truck engine. What chemical test could be used to confirm that the gas produced in a chemical reaction is carbon dioxide? Be specific, please. 4. Balance the following equations: a. NaOH + (NH_4)_2PO_4 rightarrow Na_2PO_4 + H_2O + NH_3 b. C_2H_6O + O_2 rightarrow CO_2 + H_2O

Explanation / Answer

1) energy neither created nor distroyed . one form of energy can be converted into another form. total energy of unverse constant

2)

a ) PP

b) CP

c) PP
d) PP

e) CP

3)

lime water test used to conform CO2. CO2 turns lime water milky

Ca(OH)2 + CO2 ---------------------> CaCO3 + H2O

4)

3NaOH + (NH4)3PO4 ----------------------> Na3PO4 + 3H2O + 3NH3

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