Answer: one sixteenth
Explanation: Since we know the half life of Cobalt-60 is 5.3 years, and 21.2 years have passed, we can determine how many half lifes have passed by doing division:
21.2 / 5.3 = 4
Since four half lifes have passed, we need to set up the following:
1 / 2^4 (always raise the two to the number of half lifes that have passed, in this case, four have passed, which is what we determined up above!)
When you simplify this you get 1 / 16, which is answer D.
Answer:
it will have 6 valence electrons
it will gain electrons
charge will be 2-
The quantity of heat needed to raise the temperature of one mole of a substance by one degree is called latent heat.
<h3>What is latent heat?</h3>
Latent heat is the energy that a substance absorbs or releases when going through a phase shift in its physical state without changing its temperature. The latent heat involved in melting solids or freezing liquids is referred to as the "heat of fusion," while the latent heat involved in vaporizing solids or liquids or condensing vapor is referred to as the "heat of vaporization." The quantity of heat (in joules or calories) per mole or unit mass of the substance undergoing a change in state is the typical way to represent latent heat.
L = Q/m
where,
L = latent heat of a substance
Q = energy released or absorbed during phase change
m = mass
Learn more about latent heat here:
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Covalent Compounds share molecules and a covalent compound is formed from the coming together of two non-metals and as such compounds such as NH₃ , Cl₂, SO₃, CO₂ are all sharing electrons.