3. Rephrase to “What is the formula mass of Na2CO3 if the atomic weights are as follows: Na=23g, C=12g, and O=16g?a. 106 amub. 89 amuc. 57 amud. 51 amu4. Which of the following is the correct representation of a chloride ion?a. Cl0b. Cl-1c. Cl2d. Cl5. Which of these is the correct formula of Iron (III) Sulfate?a. Fe2(SO4)3b. Fe(SO4)2c. Fe3(SO4)2d. FeSO46. How many moles on iron does 25.0g of Fe represent, if the molar mass of Fe is 55.85g?a. 80.9 moles of Feb. 30.9 moles of Fec. 2.23 moles of Fed. 0.45 moles of Fe7. A compound is formed when 1 atom of sulphur combines with 3 atoms of oxygen. What is the correct formula of the compound?a. S3Ob. SO3c. (SO)3d. (SO2)38. Tetra phosphorus trisulphide is used on the tops of “strike anywhere” matches. The formula for tetra phosphorus trisulphide is ___.a. P2S5b. P4S3c. P3S4d. P2S39. Which of the following is an empirical formula?a. C3H6b. CH4c. C2H6d. C4H10
1. 3. Rephrase to “What is the formula mass of Na2CO3 if the atomic weights are as follows: Na=23g, C=12g, and O=16g?a. 106 amub. 89 amuc. 57 amud. 51 amu4. Which of the following is the correct representation of a chloride ion?a. Cl0b. Cl-1c. Cl2d. Cl5. Which of these is the correct formula of Iron (III) Sulfate?a. Fe2(SO4)3b. Fe(SO4)2c. Fe3(SO4)2d. FeSO46. How many moles on iron does 25.0g of Fe represent, if the molar mass of Fe is 55.85g?a. 80.9 moles of Feb. 30.9 moles of Fec. 2.23 moles of Fed. 0.45 moles of Fe7. A compound is formed when 1 atom of sulphur combines with 3 atoms of oxygen. What is the correct formula of the compound?a. S3Ob. SO3c. (SO)3d. (SO2)38. Tetra phosphorus trisulphide is used on the tops of “strike anywhere” matches. The formula for tetra phosphorus trisulphide is ___.a. P2S5b. P4S3c. P3S4d. P2S39. Which of the following is an empirical formula?a. C3H6b. CH4c. C2H6d. C4H10
Explanation:
A 106
B Cl-1
A Fe2(SO4)3
