the answer is D. A magnesium atom donates two electrons to the fluorine atoms → Each fluorine atom accepts one of the electrons → The magnesium atom becomes a +2 ion → Each fluorine atom becomes a -1 ion
because magnesium only has 2 valence electrons, and it would be easier to lose electrons rather gain.
i just took the test, its right.
The transfer of internal energy in the form of electromagnetic waves.
The velocity of sound in air is 358m/s
<h3>Calculations and Parameters</h3>
Given;
- Frequency= 256 Hz
- Water level= 30cm
- Position of resonance= 100cm
- The velocity of sound in air= ?
v= 2f(L2-L1)
= 2.2.56.(1- 0.3)
=358 m/s
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Answer:
Explanation:
The simplest kinetic model is based on the assumptions that:
(1) the gas is composed of a large number of identical molecules moving in random directions, separated by distances that are large compared with their size;
(2) the molecules undergo perfectly elastic collisions (no energy loss) with each other and with the walls of the container, but otherwise do not interact; and
(3) the transfer of kinetic energy between molecules is heat. These simplifying assumptions bring the characteristics of gases within the range of mathematical treatment.