Answer:
See detailed explanation.
Explanation:
Hello,
In this case, since the International Prototype of the Kilogram (IPK) is an object made of a platinum-iridium alloy that was used to define the magnitude of the mass of the kilogram as it weights 2.2 pounds or approximately 1 kg, yet it was replaced by a new definition of the kilogram based on physical constants. In such a way, it is important because it was the base for the current understanding of what a kilogram is and its relationship with other mass measurements.
Thus, if would not have existed, we were not be able to design and use balances or mass-measuring equipment in order to provide a reliable measure of the real mass of an object.
Best regards.
The element "X" is "O" (oxygen).
<h3>Calculation:</h3>
Given,
Chemical formula = Na₂CX₃
Formula mass = 106 amu
Molar mass of Na = 23 amu
Molar mass of C = 12 amu
To find,
Element X =?
We will equate the equation as follows,
2(23) + 12 + 3(y) = 106
46 + 12 + 3y =106
58 + 3y = 106
3y = 106 - 58
3y = 48
y = 48/3
y = 16
We know that Oxygen has molecular mass of 16. Therefore the element "X" is "O".
Learn more about molar mass here:
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Answer:
C4H8
Explanation:
M(CF2) = M(C) + 2M(F) = 12.0 + 2*19.0 = 50.0 g/mol
M(unknown)/M(CF2) = 200.4 g/mol /50.0 g/mol = 4
So we need to take CF2 4 times.
C4H8
I think it's 1. PCl5= PCl3 + Cl2. I can't tell the exact reason but it's something to do with Atomic Redox Reaction
Your answer:<span> a cation that has a smaller radius than the atom.
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When you remove electrons from an atom, the atom becomes an ion that is positively charged. Cations are defined to be ions that are positively charged, so it must be a cation.
decrease in number of electrons surrounding nucleus while maintaining the positive charge from nucleus means
- less electrostatic repulsion between electrons (opposites repel, so there are less opposites to do the repelling)
- the volume due to the electrons decrease
the atomic radius gets smaller.
Feel free to drop your sc in comments if you want more help lol