A student begins an experiment with 200 grams of a reactant and ends with 175 grams of product. What most likely happened to the missing 25 grams?
A The 25 grams remained in the reactant.
B. The 25 grams were lost due to excessive pressure.
c. The 25 grams escaped as a gas.
D. The 25 grams became part of the product.

Astudent is asked to identify and element that is pale yellow brittle solid and does not conduct electricity. at which location in this periodic table would the element most likely be found?

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.

What are the major types of a chemical compound