We can be sure that a mole of table sugar and a mole of vitamin C are equal in t

Question

We can be sure that a mole of table sugar and a mole of vitamin C are equal in their (A) mass. (B) volume. (C) number of atoms. (D) number of molecules. Measurements show that the pH of a particular lake is 4.0. What is the hydrogen ion concentration of the lake? (A) 4.0 M (B) 10^-4 M (C) 10^4 M (D) 10^-10 M The atomic number of sulfur is 16. Sulfur combines with hydrogen by covalent bonding to form a compound, hydrogen sulfide. Based on the number of valence electrons in a sulfur atom, predict the molecular formula of the compound. (A) HS (B) HS_2 (C) H_2S (D) H_3S_2 What coefficients must be placed in the following blanks so that all atoms are accounted for in the products? C_6H_12 O_6 rightarrow _____ C_2H_6O + _____ CO_2 (A) 1; 2 (B) 3; 1 (C) 1; 3 (D) 2; 2

Explanation / Answer

4: Answer is D) number of molecules

5.Answer is B) 10 M ( ph = -log(H+))

6.Answer is C) H2S

7.Answer is D) 2;2

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