Answer:
I'm assuming it would be B, since it makes sense. If not, I'm really sorry.
Explanation:
Answer:
The sample will dissolve in more than 1 minute.
Explanation:
In order to answer this question, we have to consider several significant aspects:
- temperature is directly proportional to kinetic energy, that is, the greater the temperature, the greater the kinetic energy. Since kinetic energy measures velocity of the particles, this means that the greater the temperature, the greater the velocity of the individual ions of potassium phosphate;
- we may conclude from the first fact that the number of collisions in a given amount of time will then increase due to an increase in velocity;
- it also follows that the greater the temperature, the faster our salt dissolves due to an increase in the number of successful collisions.
This means that at a lower temperature, the sample will dissolve in a longer period of time.
Answer : The value of 
of the generic salt is, 
Explanation :
As we are given that, a solubility of salt is, 8.70 g/L that means 8.70 grams of salt present in 1 L of solution.
First we have to calculate the moles of salt 
Molar mass of 
= 345 g/mol
Now we have to calculate the concentration of 
The equilibrium chemical reaction will be:
Concentration of 
= 
Concentration of 
=
The solubility constant expression for this reaction is:
![K_{sp}=[A^{2+}][B^-]^2](https://tex.z-dn.net/?f=K_%7Bsp%7D%3D%5BA%5E%7B2%2B%7D%5D%5BB%5E-%5D%5E2)
Now put all the given values in this expression, we get:
Thus, the value of of the generic salt is,
In atomic models balls represent an atom
Now if an atom like carbon has four holes it means it can bond with four atoms. It has valency = 4.
The atomic number of carbon is 6
the configuration is 1s2 2s2 2p2
So due to four valence electrons it can bind with four other atoms and thus we have four holes in carbon ball
The hydrogen show a valency of one
the atomic number of hydrogen = 1
its configuration is 1s1
So it can bind with one atom (max) thus we have one hole in hydrogen ball
Answer:
Explanation:58.5g NaCl(mol/58.5g)(6.02 x 1023/mol) = 6.02 x 1023 Na
+
Cl21 pre-1982 pennies (after 1982 pennies are mostly zinc with copper coating)
63.5g Cu( mol/ 63.5g)(6.02 x 1023/mol) = 6.02 x 1023 Cu
19.0g Al (mol/27.0g)(6.02 x 1023/mol) = 4.24 x 1023 Al
Demo of Oxidation Reactions
Flash bulb
2Mg + O2 2MgO fast
2Cn + O2 2CnO slow
Copper Oxide Penny
2Cu + O2 2CuO
Intro to Chapter
Stoichiometry is the process of making calculations based on formulas and balanced equations
Since Modern Chemistry involves:
Symbolic representation of models
Mathematics
Quantitative measurements
You are going to be using lots of symbols and equations and doing lots of calculations
The fundamental Question –
How do you go from combining ratio of atoms (like H2O) to something you can measure in lab?
OR How do you go between number of ato
