subject
Physics, 07.12.2020 03:00 googoo4

The products of a certain chemical reaction contain 30 kJ of potential energy, and the reactants contain 4 kJ. How much energy is released or absorbed by
the reaction?
A. 34 kJ is absorbed.
B. 26 kJ is released.
C. 34 kJ is released.
D. 26 kJ is absorbed.

ansver
Answers: 1

Another question on Physics

question
Physics, 22.06.2019 13:20
Which of the following is the main energy source for the sun? a. fission of hydrogen b. fusion of hydrogen c. fusion of helium d. fission of iron
Answers: 2
question
Physics, 22.06.2019 17:40
Emmy kicks a soccer ball up at an angle of 45° over a level field. she watches the ball's trajectory and notices that it lands, two seconds after being kicked, about 20 m away to the north. assume that air resistance is negligible, and plot the horizontal and vertical components of the ball's velocity as a function of time. consider only the time that the ball is in the air, after being kicked but before landing. take "north" and "up" as the positive ‑ and ‑directions, respectively, and use ≈10 m/s2 for the downward acceleration due to gravity.
Answers: 2
question
Physics, 22.06.2019 20:30
Ascientist notices that an oil slick floating on water when viewed from above has many different colors reflecting off the surface, making it look rainbow-like (an effect known as iridescence). she aims a spectrometer at a particular spot and measures the wavelength to be 750 nm (in air). the index of refraction of water is 1.3
Answers: 1
question
Physics, 23.06.2019 06:20
69. air frictionthe velocity of the satellitea. decreases b. increases c. sometimes increases sometimedecreases d. no effect at all70. the unit of gravitational potential energy isa.jouté b.watt c. newtond.pascal71. which of the following is not influenced by a magneta. cobalt b.copper c.irond. nickel72. one joule of work done in one second by unit positive chargea.1 watt b.1 volt c.1 js d. none73. the most deviated colour of light after passing through a prisea. violet b.red c. green d.yellow4. a coin is placed below a beaker fill with water upto 12 cm isdisplaced by water isa. 9cm b.6cmс.3cmd.7cm
Answers: 1
You know the right answer?
The products of a certain chemical reaction contain 30 kJ of potential energy, and the reactants co...
Questions
question
English, 24.09.2019 22:00
question
Mathematics, 24.09.2019 22:00
question
Mathematics, 24.09.2019 22:00
question
Social Studies, 24.09.2019 22:00
question
Mathematics, 24.09.2019 22:00