Answer:
C. 0.04 moles per cubic decimeter.
Explanation:
The molar mass of the Iodine is 253.809 grams per mole and a cubic decimeter equals 1000 cubic centimeters. The concentration of Iodine (
), measured in moles per cubic decimeter, can be determined by the following formula:
(1)
Where:
- Mass of iodine, measured in grams.
- Molar mass of iodine, measured in grams per mol.
- Volume of solution, measured in cubic decimeters.
If we know that
,
and
, then the concentration of iodine in a solution is:
![c = \frac{2.54\,g}{\left(253.809\,\frac{g}{mol} \right)\cdot (0.25\,dm^{3})}](https://tex.z-dn.net/?f=c%20%3D%20%5Cfrac%7B2.54%5C%2Cg%7D%7B%5Cleft%28253.809%5C%2C%5Cfrac%7Bg%7D%7Bmol%7D%20%5Cright%29%5Ccdot%20%280.25%5C%2Cdm%5E%7B3%7D%29%7D)
![c = 0.04\,\frac{mol}{dm^{3}}](https://tex.z-dn.net/?f=c%20%3D%200.04%5C%2C%5Cfrac%7Bmol%7D%7Bdm%5E%7B3%7D%7D)
Hence, the correct answer is C.
卂几丂山乇尺
Point "C" is correct and all the remaining are false.
Note, HomeAtomic and HeteroAtomic compounds are the types of compounds, but not homogenous and heterogenous.
The energy that was released by the candy is calculates using the below formula
Q=Mc delta T
Q= heat energy
m= mass (500g)
C= specific heat capacity) = 4.18 j/g/c
delta t =change in temperature = 25- 21 = 4 c
Q= 500 g x 4.18 j/g/c x 4c = 8360 j
Average atomic mass is the weighted average atomic mass of an element with regard to the abundance of all its isotopes.
average atomic mass of X can be calculates as follows;
average atomic mass of X = sum of the products of mass of isotopes by their abundance percentages
average atomic mass of X = (94.93 % x 31.97207 amu) + (0.7640% x 32.97146 amu) + (4.290% x 33.96786 amu) + (1.600×10−2% x <span>35.96709 amu)
</span>average atomic mass of X = 30.35 + 0.2519 + 1.457 + 0.005755
therefore average atomic mass of X = 32.06
Answer:
dont listen to the mainstream media since 50% is ran by the jews and they tend to be lying and deceiving people
Explanation: