(4.50x10^16)/(6.02x10^24) = 7.5mols
7.5mols x 39.1= 293.25grams
Answer:
The freezing point depression ∆T = KF·m where KF is the molal freezing point depression constant and m is the molality of the solute. Rearrangement gives: mol solute = (m) x (kg solvent) where kg of solvent is the mass of the solvent (lauric acid) in the mixture. This gives the moles of the solute.
Explanation:
Does this help at all??
Answer:
A. iodine
C. fluorine
F. bromine
Explanation:
Ionic bonds occur mostly between metals and non-metals. Usually, a wide electronegativity difference is preferred between the two atoms. This makes one atom more desirous to gain electron and other more willing to donate electrons.
To have Zn forming a compound in the ratio of 1 to 2, the combining power must be similar to this.
The dominant oxidation state of Zn is the is the +2 state.
The other combining atoms must have the ability to recieve the two electrons.
The halogens fit perfectly into this picture. They need just an electron to attain nobility. They are also highly electronegative. If two halogens combines with the Zn, then the ionic bond will result.
The halogens are fluorine,chlorine, bromine, iodine and astatine.
They will form these compounds:
ZnF₂, ZnBr₂ and ZnI₂
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The right answer is B.
In proposition B, 0.00116 meters is equal to 1.16 millimeters.
In Proposition A, it is equal to 11.6 millimeters (1km = 1,000,000mm), the decimal point is six digits.
In Proposition C, 0.116dm is equal to 11.6 millimeters (1dm = 100mm), the decimal point is shifted by two digits.
In proposition D, 1.16cm is equal to 11.6 millimeters (1cm = 10mm), the decimal point is shifted by one digit.