Answer:
Explanation:
The molar mass is the mass of a substance in grams per mole.
To find it, add the mass of each element in the compound. These masses can be found on the Periodic Table.
The compound given is:
The compound has 1 Ca (calcium) and 2 Cl (chlorine).
Mass of Calcium
- The molar mass of calcium is 40.08 g/mol
- There is only one atom of Calcium in CaCl₂, so the number above is what we will use.
Mass of Chlorine
- The molar mass of chlorine is 35.45 g/mol
- There are two atoms of chlorine in CaCl₂, therefore we need to multiply the molar mass by 2.
- 35.45 * 2= 70.9 g/mol
Molar Mass of CaCl₂
- Now, to find the molar mass, add the molar mass of 1 calcium and 2 chlorine.
- 40.08 g/mol + 70.9 g/mol =110.98 g/mol
The molar mass of CaCl₂ is <u>110.98 grams per mole. </u>
By definition of noble gases, neon does not easily form an ionic bond because it belongs to the group of noble or inert gases, so its reactivity is practically nil.
<h3>Noble gases</h3>
Noble gases are not very reactive, that is, they practically do not form chemical compounds. This means that they do not react with other substances, nor do they even react between atoms of the same gas, as is the case with diatomic gases such as oxygen (O₂).
The chemical stability of the noble gases and therefore the absence of spontaneous evolution towards any other chemical form, implies that they are already in a state of maximum stability.
All chemical transformations involve valence electrons, they are involved in the process of covalent bond formation and the formation of ions. Therefore, the practically null reactivity of the noble gases is due to the fact that they have a complete valence shell, which gives them a low tendency to capture or release electrons.
Since the noble gases do not react with the other elements, they are also called inert gases.
<h3>Neon</h3>
Neon does not easily form an ionic bond because it belongs to the group of noble or inert gases, so its reactivity is practically nil.
Learn more about noble gases:
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Answer A) : We have to calculate the number of moles of Benzene involved in the reaction,
30 g / 78 moles of benzene = 0.384 moles
For bromine it will be the same process,
65 g / 159.8 moles = 0.406 moles
By observing the reaction given above we can say that the reaction ratio of bromine and benzene is 1 : 1
We need to find the mass of bromobenzene,
which should be, 6(12) + 5 (1)+ 79.90 = 156.9 g/mol
So, the mass of bromobenzene will be 156.9 g/mol X 0.3846 mol = 60.343 g
Hence the theoretical yield will be 60.34 g
Answer B) : To calculate the actual yield we have to divide it with theoretical yield.
(56.7g / 60.343 g ) X100% = 93.96 %
Here, we can say that we got 93.96 % of actual yield.
As we know it is impossible to get 100% yield in any reaction.
1) Well, you need to logically think about which of the pecan trees would be better. Tree 3 may have more clusters but they taste bitter so this is out of the option. So Tree 4 and Tree 1 would be best because they both have rich and buttery tastes and they both have a lot of clusters.
2) Not quite sure about this one, sorry :(
It has a single valence electron.
3pro & 3ele - it is the single electron in shell 2.
