In a certain chemical reaction, 2 solid Mg atoms bond with O2 gas to produce solid Mgo. Which of the following reaction equations correctly describes this reaction?
A) 2Mg (s) + O2 (g) – Mgo (1)
B) 2Mg (s) + O2 (g) – 2MgO (s)
C) Mg (s) + 202 (g) – Mgo (s)
D) Mg (g) + O2 (s) – 2MgO (g)

A100 kmol/h stream that is 97 mole% carbon tetrachloride (ccl4) and 3% carbon disulfide (cs2) is to be recovered from the bottom of a distillation column. the feed to the column is 16 mole% cs2 and 84% ccl4, and 2% of the ccl4 entering the column is contained in the overhead stream leaving the top of the column. calculate the mass and mole fractions of ccl4 in the overhead stream, and determine the molar flow rates of ccl4 and cs2 in the overhead and feed streams. 12. mw_ccla- 153.82; mw_cs2-76.14.

Which statement best describes the function of enzymes?

Question 3(multiple choice worth 4 points) (04.04 lc) what does it mean when an element is reduced? it empties a valance shell, reducing its atomic radius. it gains electrons, reducing its overall charge. it increases electronegativity, reducing its ability to bond. it loses electrons, reducing its electron number.