D Hetero-tropic herbivore <span />
Answer:
- Absolute pressure inside the ball: .
- Number of moles of air particles inside the ball, by the ideal gas law: approximately .
Explanation:
The gauge pressure inside the ball gives the absolute pressure inside the ball, relative to the atmospheric pressure outside the ball. In other words:
.
Rearrange to obtain:
.
Look up the ideal gas constant. This constant comes in a large number of unit combinations. Look for the one that takes for pressure and for volume.
.
Convert the temperature to absolute temperature:
.
Assume that the gas inside this ball acts like an ideal gas. Apply the ideal gas law (after rearranging) to find the number of moles of gas particles in this ball:
.
(Rounded to two significant figures, as in the pressure gauge reading.)
Answer:
b. 16 protons, 18 neutrons, and 18 electrons
Explanation:
Things to be remembered
Negative charge on any ionic species indicates gained the electrons
Positive charge on any ionic species indicates lost the electrons
A sulfur atom has 16 protons, 18 neutrons, and 16 electrons, A sulfide ion has a 2– charge which indicates that sulphur has gained two electron from any other atom, ion or species!
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Answer:
A channel in an ancient Martian "river bed" was not carved out by liquid water but built by molten lava