A solution of Ba(NO_3)_2 is added to a solution of Na_2SO_4 to make a precipitat

Question

A solution of Ba(NO_3)_2 is added to a solution of Na_2SO_4 to make a precipitate. From the table of solubility rules, the product is: a) barium sulfate b) sodium nitrate c) sodium nitrite d) barium sulfite Which one of the following reactions is not balanced? A. 2 C_6H_6 (I) + 15 O_2 (g) rightarrow 12 CO_2(g) + 6 H_2O(g) B. B_2O_2(s) + 6 HF (I) rightarrow 2 BF_3 (g) + 3 H_2O(l) c. UO_2(g) + 4 HF (I) rightarrow UF_4 (s) 4 H_2O (I) D. 2 B_5H_p(I) + 12 O_2 (g) rightarrow 5 B_2O_3(s) + 9H_2O(g) Which of the following is a weak base? A. NaOH B. Ca(OH)_2 C. NH_3 D. RbOH If 25 ml of 0.75 M NaOH(aq) is required to completely neutralize 150 ml of HCI (aq) what is the molarity of the acidic solution? A. 0.15 M B. 0.125 M C. 0.25 M D. 0.75 M E. 1.25 M Consider the reaction, Fe(s) + Cu^2+(aq) rightarrow Fe^2+ (aq) which statement is true for the reaction? A. Cu^2+ is oxidized B. Fe(s) gains in oxidatioin state. C. Cu^2+ is reduced. D. Fe(s) is reduced. When the following equation is balanced using the smallest possible integers, what is the coefficient of O_2(g)? C_2H_18O_3(I) + O_2 (g) rightarrow H_2O(g) + CO_2 (g) A. 9 B. 25 C. 12.5 D. 11 E.8 What is the chemical formula for sulfuric acid? A) H_2S B) H_2SO_3 C) H_2SO_4 D) H_3SO_4 Which of the following types of chemical reactions is illustrated below? HCI (aq) + NaOH (aq) rightarrow NaCI(aq) + H_2O (I) A) combination B) decomposition C) single replacement D) double replacement A beaker contains 100 mL of salt water. If 100 mL of distilled water is added to the beaker, the number of moles of NaCI A) increases by 50% B) decreases by 50% C) doesn't change 1.35 liters are equal to how many milliliters? A) 0.00135 mL B) 135 mL C) 1350 mL D) 0.135 mL

Explanation / Answer

11. option C

12. option A

13. option C

14. option C

15. option B

16. option C

17. option D

18. option C

19. option D

20. option C

21. option C

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