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Butane C4 H10 (g),(Delta.Hf = –125.7), combusts in the presence of oxygen to form CO2 (g) (Delta.Hf = –393.5 kJ/mol), and H2 O(g) (Delta.Hf = –241.82) in the reaction: 2 upper C subscript 4 upper H subscript
answered
Jun 20, 2021
Chemistry
middle-school
6
votes
84.1k
views
A cone has a height of 16 feet and a radius of 8 feet. What is its volume? Use ≈ 3.14 and round your answer to the nearest hundredth. Can you also write down the formula to solve it.
answered
May 29, 2021
Mathematics
middle-school
1
vote
64.2k
views
The mission of the Department of Transportation is to ensure the safety and efficiency of the transportation system. The Department of Transportation has accepted public comments regarding the safety of
answered
May 28, 2021
Social Studies
high-school
3
votes
170k
views
According to the law of conservation of matter, how must a chemical equation be written? Question 6 options: The subscript of every element must be the same on each side of the equation. An equal number
answered
May 7, 2021
Chemistry
high-school
1
vote
66.2k
views
What was contained in the first part of Justinian's Code of Law, which is called the Codex? a textbook for law students. a collection of Roman laws created up to that point. a collection of essays by legal
answered
Apr 28, 2021
History
college
4
votes
185k
views
A piston at a volume of 20. L holds a gas at 100 degrees Celsius. The volume changes to 15 L as the gas is cooled. What is the new temperature of the gas in the piston in degrees celsius?
answered
Apr 1, 2021
Chemistry
middle-school
5
votes
101k
views
How old was george washington when he died
answered
Feb 7, 2021
History
middle-school
7
votes
122k
views
How does climate change influence hurricanes?
answered
Jan 28, 2021
Advanced Placement (AP)
high-school
5
votes
136k
views
What does that 3/8 ÷ 2/5 equal
answered
Jan 9, 2021
Mathematics
middle-school
4
votes
157k
views
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