The periodic table of elements is divided into columns and rows. The vertical columns represent the groups while the horizontal rows represent the periods. A group of elements usually have similar physical and chemical properties. The first column of the periodic table is made up of 7 elements including SODIUM.
1. The name of the element chosen is sodium and its chemical symbol is Na.
2. Sodium is a metal and thus it has metallic properties.
3. Sodium belongs to group one elements whose family name is ALKALI METALS.
4. The neutral atom of sodium is made up of 11 protons, 11 electrons and 12 neutrons.
Answer:
The answer to your question is 144 kg
Explanation:
Data
Q = 8669 kJ
T1 = 75°F
T2 = 195°F
Cp = 0.897 J/(g°C)
m = ?
Formula
Q = mCp(T2 - T1)
Process
1.- Convert temperature to °C
T1 = (75 - 32) / 1.8
= 43/1.8
= 23.9°C
T2 = (195 - 32) / 1.8
= 163/1.8
= 90.6°C
2.- Solve for m
m = Q / Cp(T2 - T1)
3.- Substitution
m = 8669000 / 0.897(90.6 - 23.9)
4.- Simplification
m = 8669000 / 59.83
5.- Result
m = 144893.66 g or 144.9 kg
Hello There!
This is called a "Chemical Change"
A chemical change is when the composition of a substance changes. There are many signs of chemical changes. When a chemical change occurs, you can see a change in color. When a new color is visible that means that a new substance has been created. There also is a new smell "odor" this hints that a new substance has been formed.
The answer is d: Combustion, because it is the so-called combustion of methan. (Check your lesson)
Hey there!
I attached a screenshot of my chemistry notes from this year on equilibrium constants in particular. Feel free to reference this in the future if you wish.
Based on the information in my attachment, you could construct your constant like this:
![K_{eq} = \frac{[CaO][CO_{2}]}{[CaCO_{3}]}](https://tex.z-dn.net/?f=%20K_%7Beq%7D%20%3D%20%20%5Cfrac%7B%5BCaO%5D%5BCO_%7B2%7D%5D%7D%7B%5BCaCO_%7B3%7D%5D%7D%20)
I don't think it matters which order your reactants or products are in as long as you have them on the top and bottom where they need to be, so your answer will be B.
Hope this helped you out! :-)