Answer:
Explanation:
Molarity is a measure of concentration in moles per liter.
The molarity of the solution is 1.2 M NaNO₃ or 1.2 moles NaNO₃ per liter. There are 0.25 liters of the solution. The moles of solute are unknown, so we can use x.
- molarity= 1.2 mol NaNO₃/L
- liters of solution=0.25 L
- moles of solute =x
We are solving for x, so we must isolate the variable, x. It is being divided by 0.25 liters. The inverse of division is multiplication, so we multiply both sides by 0.25 L.
The units of liters cancel, so we are left with the units moles of sodium nitrate.
There are 0.3 moles of sodium nitrate.
<span>I think it's HgNO3 because the subscripts on Hg and No3 are divisible by 2 :)
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Answer:
Electrons are particles that surround the nucleus of an atom like a cloud. As with protons and neutrons, electrons are essential to an atom's structure.
The number of the valence electrons determines the oxidation state i.e. oxidation number e.g. oxygen has 6 valence electrons the oxidation number is -2 that its need to fill up an octet structure.
The average for male adults is about 60% and an female adult is around 50% depending on weight , age , and height