HCI is one of the most common acids out of the following
The compound
is formed only by sharing of electrons between the atoms. The structure of the compound is shown in the image.
Each line between two atoms represents the sharing of an electron pair which results in the formation of a single bond. Since, carbon has 4 electrons in its valence shell and hydrogen has 1 electron in its valence shell so in order to complete the octet ( to have 8 electrons in their valence shell, noble gas configuration) to attain stability carbon needs 4 more electrons and hydrogen needs 1 electron. So, sharing of electron will occur as shown in the image and the formed compound is stable in nature.
Since, the bond that is formed by sharing of electrons between atoms is known as covalent bond. So, covalent bonding is most important in
.
Answer:
Option 2 and 4 are correct
Explanation:
The reactants in the attached image have more enthalpy and hence less stability as they are more reactive. Thus, Product is more stable than the reactants.
This is an addition reaction in which two reactants add up to form the product.
Very less activation energy is required as the reactants themselves are unstable, possess high energy and hence are very reactive.
Reactants have more energy than the products.
Answer:
The change in temperature that occurs when 8000 J of heat is used by a mass 75 g of water is 25.4 °C
Explanation:
H = mc ΔT
m = 75 g
c = 4. 200 J/ g °C
H = 8000 J
ΔT =?
Rearranging the formula, making ΔT the subject of formula;
ΔT = H / m c
ΔT = 8000 / 75 * 4.200
ΔT = 8000 / 315
ΔT = 25.4 °C
Answer:
1335.12 mL of H2O
Explanation:
To calculate the mililiters of water that the solution needs, it is necessary to know that the volume of the solution is equal to the volume of the solute (NaOH) plus the volume of the solvent (H2O).
From the molarity formula we can first calculate the volume of the solution:
![M=\frac{solute moles}{solution volume}](https://tex.z-dn.net/?f=M%3D%5Cfrac%7Bsolute%20moles%7D%7Bsolution%20volume%7D)
![Solutionvolume=\frac{solute moles}{M} =\frac{5mol}{3.5\frac{mol}{L} } =1.429L](https://tex.z-dn.net/?f=Solutionvolume%3D%5Cfrac%7Bsolute%20moles%7D%7BM%7D%20%3D%5Cfrac%7B5mol%7D%7B3.5%5Cfrac%7Bmol%7D%7BL%7D%20%7D%20%3D1.429L)
The volume of the solution as we said previously is:
Solution volume = solute volume + solvent volume
To determine the volume of the solute we first obtain the grams of NaOH through the molecular weight formula:
![MW=\frac{mass}{mol}](https://tex.z-dn.net/?f=MW%3D%5Cfrac%7Bmass%7D%7Bmol%7D)
![Mass=MW*mol=39.997\frac{g}{mol} *5mol=199.985g](https://tex.z-dn.net/?f=Mass%3DMW%2Amol%3D39.997%5Cfrac%7Bg%7D%7Bmol%7D%20%2A5mol%3D199.985g)
Now with the density of NaOH the milliliters of solute can be determined:
![d=\frac{mass}{volume}](https://tex.z-dn.net/?f=d%3D%5Cfrac%7Bmass%7D%7Bvolume%7D)
![Volume=\frac{mass}{d} =\frac{199.985g}{2.13\frac{g}{mL} } =93.88mL of NaOH](https://tex.z-dn.net/?f=Volume%3D%5Cfrac%7Bmass%7D%7Bd%7D%20%3D%5Cfrac%7B199.985g%7D%7B2.13%5Cfrac%7Bg%7D%7BmL%7D%20%7D%20%3D93.88mL%20of%20NaOH)
Having the volume of the solution and the volume of the solute, the volume of the solvent H2O can be calculated:
Solvent volume = solution volume - solute volume
Solvent volume = 1429 mL - 93.88 mL = 1335.12 mL of H2O