Chemistry, 10.04.2021 18:40 christianmason9423
30 points for correct answer
As a part of an investigation, students combined substances in a beaker to observe chemical reactions. They performed two procedures. They measured the mass of each substance before and after each reaction. The table shows their observations.
Procedure 1: mass of reactants: 100g Mass of products: 97.5g
Procedure 2: mass of reactants: 100g Mass of products: 102.5g
What likely explains these changes in mass?
A) Procedure 1: The reactants were liquids with different densities.
Procedure 2: The reactants were combined into only one product.
B) Procedure 1: One of the products was a gas that escaped into the air.
Procedure 2: A gas from the air reacted with one of the other reactants.
C) Procedure 1: All the reactants were liquids that evaporated.
Procedure 2: A gas was formed as one product, and it escaped into the air.
D) Procedure 1: One of the reactants was converted to thermal energy.
Procedure 2: All the products were liquids.
Answers: 2
Chemistry, 21.06.2019 18:00
Aballoon inflated with three breaths of air has a volume of 1.7 l. at the same temperature and pressure, what is the volume of the balloon if five more same-sized breaths are added to the balloon? a balloon inflated with three breaths of air has a volume of 1.7 l. at the same temperature and pressure, what is the volume of the balloon if five more same-sized breaths are added to the balloon?
Answers: 3
Chemistry, 21.06.2019 23:30
For the following dehydrohalogenation (e2) reaction, draw the zaitsev product(s) resulting from elimination involving c3–c4 (i.e., the carbon atoms depicted with stereobonds). show the product stereochemistry clearly. if there is more than one organic product, both products may be drawn in the same box. ignore elimination involving c3 or c4 and any carbon atom other than c4 or c3.
Answers: 3
Chemistry, 22.06.2019 10:50
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.
Answers: 3
Chemistry, 23.06.2019 05:50
Which of the following is not a characteristic of s waves?
Answers: 1
30 points for correct answer
As a part of an investigation, students combined substances in a beake...
Computers and Technology, 13.04.2021 02:10
Social Studies, 13.04.2021 02:10
Mathematics, 13.04.2021 02:10
World Languages, 13.04.2021 02:10