Answer:
Cobalt chloride
Explanation:
It is a molecule formed of one Cobalt atom, and two Chlorine atoms.
Answer:
b. 2-4
Explanation:
Look at the slope of the line, between 0-2 and 4-6 the slope is only 10, but between 2-4 the slope is 20, so that's when the temperature is changing the fastest. In the same time it took for the water to increase by 20 degrees between 0-2 and 4-6, the temperature of the water increased by 40 degrees between 2-4 so that's when the change is the fastest.
Answer:
The volume in cubic centimeters is 250
Explanation:
The rule of three or is a way of solving problems of proportionality between three known values and an unknown value, establishing a relationship of proportionality between all of them.
If the relationship between the magnitudes is direct, that is, when one magnitude increases, so does the other (or when one magnitude decreases, so does the other), the direct rule of three must be applied. To solve a direct rule of three, the following formula must be followed:
a ⇒ b
c ⇒ x
So:
![x=\frac{c*b}{a}](https://tex.z-dn.net/?f=x%3D%5Cfrac%7Bc%2Ab%7D%7Ba%7D)
The direct rule of three is the rule applied in this case where there is a change of units. To perform this conversion of units, you must first know that 1 mL = 1 cubic centimeters. So, if 1 cubic centimeters is 1 mL, how many cubic centimeters equals 250 mL?
![cubic centimeters=\frac{250 mL*1 cubic centimeters }{1 mL}](https://tex.z-dn.net/?f=cubic%20centimeters%3D%5Cfrac%7B250%20mL%2A1%20cubic%20centimeters%20%7D%7B1%20mL%7D)
cubic centimeters= 250
<u><em>The volume in cubic centimeters is 250</em></u>
Answer:
The molar concentration of water in water is 55,5 moles/L
Explanation:
In chemistry, concentration refers to the amount of a substance per defined space. Molar concentration refers to moles of solute per liter of solution.
To obtain the molar concentration of water in water you need to know how many moles of water you have in a liter, thus:
1L ×
×
= <em>55,5 moles/L</em>
<em></em>
I hope it helps!
Given :
Temperature , T = 25°C = (25 + 273) K = 298 K .
The standard enthalpy change ,
.
The standard entropy change ,
.
To Find :
The standard free energy change at 25° C .
Solution :
Standard free energy is given by :
![\Delta G^o=\Delta H^o-T\Delta S^o\\\\\Delta G^o=-631-[298\times (-0.430)]\ kJ\\ \\\Delta G^o=-631-(-128.14)\ kJ\\\\\Delta G^o=-502.86\ kJ](https://tex.z-dn.net/?f=%5CDelta%20G%5Eo%3D%5CDelta%20H%5Eo-T%5CDelta%20S%5Eo%5C%5C%5C%5C%5CDelta%20G%5Eo%3D-631-%5B298%5Ctimes%20%28-0.430%29%5D%5C%20kJ%5C%5C%20%5C%5C%5CDelta%20G%5Eo%3D-631-%28-128.14%29%5C%20kJ%5C%5C%5C%5C%5CDelta%20G%5Eo%3D-502.86%5C%20kJ)
Therefore , the standard free energy change at 25° C is -502.86 kJ .
Hence , this is the required solution .