Question

14) 25.0 g of H$_2$ reacts with excess I$_2$ according to the following unbalanced reaction. (6 pts) How many grams of HI are formed? H$_2$ + I$_2$ $\to$ HI 15) A beaker contains 150 mL of a 0.30 M NaBr aqueous solution. 475 mL of water is added to the beaker. What is the new NaBr concentration? (6 pts) 16) Sylvie is asked to produce 275 mL of a 0.400 M MgCl$_2$ solution. How many grams of MgCl$_2$ does she need? (6 pts) 17) What is the mass percent composition of Mg(OH)$_2$? - provide answer with four significant figures (6 pts)

          14) 25.0 g of H$_2$ reacts with excess I$_2$ according to the following unbalanced reaction. (6 pts)
How many grams of HI are formed?
H$_2$ + I$_2$ \(\to\) HI
15) A beaker contains 150 mL of a 0.30 M NaBr aqueous solution.
475 mL of water is added to the beaker. What is the new NaBr concentration?
(6 pts)
16) Sylvie is asked to produce 275 mL of a 0.400 M MgCl$_2$ solution.
How many grams of MgCl$_2$ does she need?
(6 pts)
17) What is the mass percent composition of Mg(OH)$_2$?
- provide answer with four significant figures
(6 pts)

14) 25.0 g of H2 reacts with excess I2 according to the following unbalanced reaction. (6 pts)
How many grams of HI are formed?
H2 + I2 → HI
15) A beaker contains 150 mL of a 0.30 M NaBr aqueous solution.
475 mL of water is added to the beaker. What is the new NaBr concentration?
(6 pts)
16) Sylvie is asked to produce 275 mL of a 0.400 M MgCl2 solution.
How many grams of MgCl2 does she need?
(6 pts)
17) What is the mass percent composition of Mg(OH)2?
- provide answer with four significant figures
(6 pts)

Added by James P.

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