Answer:
B. Size
Explanation:
its reactivity, flammability and combustibility depend on its chemical properties but its size is its physical property
Answer: The moles needed are 0.01.
Explanation:
Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.
where,
n = moles of solute 
= ?
= volume of solution in ml
Now put all the given values in the formula of molarity, we get
Therefore, the moles needed are 0.01.
Explanation:
Step 1: Write out the chemical formula of the compound.
Magnesium Chloride = MgCl^2
Step 2: Convert moles into number of compounds using Avogadro's number
0.5 moles MgCl^2 ⋅(6.022⋅10^23 - 1 mole MgCl^2)= 3.011⋅ 10^23
Step 3: Determine how many Chloride ions there will be in 1 compound
There will be 2 Cl− ions in each compound (Cl^2 part)
Step 4: Multiply the number from Step 2 by the number in Step 3
3.011 ⋅ 10^23 ⋅ 2= 6.022 ⋅ 10^23
We do this because the ratio is 2 Cl− ions for every 1 compound.
In the case of finding how many ions in general (both sodium and chloride), we would multiply by 3 because there are 3 ions per 1 compound.
I hope this helped!
M(C)=73.5 g
m(H)=4.20 g
m(Cl)=72.3 g
mass of compound
m=m(C)+m(H)+m(Cl)
m=73.5+4.20+72.3=150 g
w(H)=100m(H)/m
w(H)=100*4.20/150=2.8%
w(Cl)=100m(Cl)/m
w(Cl)=100*72.3/150=48.2%
w(C)=100-w(H)-w(Cl)
w(C)=100-2.8-48.2=49.0%
First you have to divide it by seven and then with the numbers do you have to put in the first quiz and then you have to add it on
