b. Ionic solids have higher melting points than molecular solids.
c. Molecular solids have higher melting points than all other types of solids.
d. It is impossible for solids to melt; therefore solids do not have melting points.
B. Ionic solids have higher melting points than molecular solids.
73 Draw a structural formula for the ethanol formed during this reaction.
74 Describe how the catalyst, zymase, speeds up this reaction.
75 Determine the total mass of ethanol produced when 270. grams of glucose reacts completely to form ethanol and 132 grams of carbon dioxide.
B. newton.
C. gram.
D. nanometer.
Answer:
0.09 M/s is the initial rate when concentration of reactant A is 0.900 M.
Explanation:
A → B
1) Initial concentration of A = [A] =0.300 M
Rate constant of the reaction , k = ?
Rate equation for the second order kinetic is given as:
2) Rate of the reaction when initial concentration of A was 0.900M be R'.
[A] = 0.900M
O A physical change does not change the chemical formula of the substance
O A physical change has similar characteristics as a chemical change.
A physical change is a change in how the substances react with other substances.
The correct answer is physical change does not change the chemical formula of the substance.
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Answer:
B. a physical change does not change the chemical formula of the substance
Explanation:
Physical change does not change the substance or identity of an object