Chemistry, 24.07.2019 12:30 milkshakegrande101
Pentaborane b5h9(s) burns vigorously in o2 to give b2o3(s) and h2o(l). what is δh° for the combustion of 1 mol of b5h9(s)? substance δh°f (kj/mol) b2o3(s) –1273.5 b5h9(s) +73.2 h2o(l) –285.8 a. -1486.1 kj b. -1632.5 kj c. -4396.7 kj d. -4652.85 kj e. -9086.1 kj
Answers: 2
Chemistry, 21.06.2019 23:50
2points what is the job of a scientist? a. to answer ethical questions. b. to write laws based on his or her knowledge. c. to ask and answer scientific questions. d. to ignore facts that do not support his or her theory.
Answers: 1
Chemistry, 22.06.2019 13:30
Astudent is trying to create a table that compares hypotheses, theories, and laws. hypothesis theory law do scientific researchers formulate it? yes yes yes does it explain why things happen? yes yes no yes yes yes is it used to make predictions? no yes yes which of the following questions would most likely fill the blank in the table? is it an intelligent guess? is it newly formulated? is it based on observations? has it been proved?
Answers: 1
Chemistry, 22.06.2019 17:30
What will most likely happen in the absence of a cell membrane? a) photosynthesis will not take place. b) the cell will not store food, water, nutrients, and waste. c) energy will not be released during cellular respiration. d) substances will pass in and out of the cell in an uncontrolled manner.
Answers: 1
Pentaborane b5h9(s) burns vigorously in o2 to give b2o3(s) and h2o(l). what is δh° for the combustio...
English, 07.09.2020 05:01
Biology, 07.09.2020 05:01
Mathematics, 07.09.2020 05:01
Mathematics, 07.09.2020 05:01
English, 07.09.2020 05:01