Answer: A property closely related to an atom's mass number is its atomic mass. The atomic mass of a single atom is simply its total mass and is typically expressed in atomic mass units or amu. By definition, an atom of carbon with six neutrons, carbon-12, has an atomic mass of 12 amu.
Hope this helps....... Stay safe and have a Merry Christmas!!!!!!!! :D
Answer:
Explanation:
N₂ + 3 H₂ → 2 NH₃
1 mole 3 moles 2 moles
3.45 moles 10.35moles 6.90 moles
So 3.45 moles of nitrogen will require 10.35 moles of hydrogen
But hydrogen available is only 4.85 so this gas is the limiting reagent and product will be formed according to its mass .
a )
3 moles of hydrogen can form 2 moles of ammonia
4.85 moles of hydrogen will form 2 x 4.85 / 3 moles of ammonia
= 3.23 moles .
b ) hydrogen is the limiting reagent .
c ) Excess reactant is nitrogen
3 moles hydrogen need 1 mole of nitrogen
4.85 moles of hydrogen will need 4.85 / 3 moles of nitrogen
= 1.62 moles of nitrogen .
excess nitrogen = 3.45 - 1.62
= 1.83 moles.
<span>What did you observe?
When the mixture of Jell-O is shined with the light you observe that the mixture becomes opaque or misty.
In the other two glasses the mixture remains clear
The Jell-O mixture dispereses the light while the other two glasses let the light pass through them.
What is the Tyndall effect?
The Tyndall effect is the dispersion of light by colloid particles. This happens becasue colloid particles present in the mixture are bigger than solvated particles.
Colloid particles are so small that they cannot be in the mixture, but are big enough to disperse the light.
Which glass displayed the Tyndall effect?
The glass with the Jell-O displayed the Tyndall effect.
What does that tell you about the substance in the glass?
The mixture of this glass is a colloid, because they are the only mixtures that may look clear but becomes misty when the light passes trhough them.
Which glass represents a pure substance?
Only the glass with pure water represents a pure substance, one of the glasses that did not disperse the light.
Which glass represents a solution?
The other glass that did not disperse the light is a solution.
Pure substances and solutions do not disperese water. Diluted coloids look clear but disperse light.
</span>
The solid water particles are less dense than the liquid water particles
Answer:
Na ·
Explanation:
Hello!
In this case, since the Lewis dot structure of any element illustrates the number of valence electrons at the outer shell; we can set up the electron configuration of sodium to obtain:
We can see there is only one valence electron, for that reason the Lewis dot structure is:
Na ·
Whereas the dot represents the valence electron.
Best regards!
