Water is 88.88 percent oxygen by mass. Oxygen is exactly what a fire needs to grow brighter and stronger. So why doesn't a fire grow brighter and stronger when water is added to it?
A) Oxygen in water is already "reduced" from the hydrogen atoms, so this oxygen atom no longer has a great attraction for additional electrons.
B) The oxygen is chemically bound to hydrogen atoms.
C) Oxygen in water is completely different from oxygen O2, which is what is required for combustion.
D) all of the above
Answer: D
You might also like to view...
Shell Radius: An ionized atom having Z protons has had all but one of its electrons removed. If R is the radius of the ground state electron orbit in atomic hydrogen, then what is the radius of the shell of the remaining electron in the ionized atom?
A. Z2R B. ZR C. R D. R/Z E. R/Z2
A 2.00-m long metal wire is formed into a square and placed in the horizontal xy-plane. A uniform magnetic field is oriented at 30° above the horizontal with a strength of 0.344 T. What is the magnetic flux through the square due to this field?
A) 0.0745 T ? m2 B) 0.172 T ? m2 C) 0.0430 T ? m2 D) 0.298 T ? m2
When nucleons join to form a stable nucleus, energy is
A) destroyed. B) absorbed. C) released. D) not transferred. E) either absorbed or released depending on nucleons involved.
A potter's wheel decelerates from 50 rev/min to 30 rev/min in 5.0 s, with a constant deceleration. What is the magnitude of the deceleration?
A) 4.0 rad/s2 B) 0.42 rad/s2 C) 25 rad/s2 D) 38 rad/s2 E) 20 rad/s2