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3 years ago

What do the following have in common: MgCl2, AlF3, CaI2, KCl

Chemistry

2 answers:

arsen [322]3 years ago

8 0

Answer:

They are salts, ionic compounds

Explanation:

To know if they are covalent or ionic we need to check their difference in electronegativity. As an example mgcl2, mg has electronegativity of 1.2 and cl 3 so 3-1.2=1.8 which is bigger than 1.7 means it's ionic therefore they are salts

Kay [80]3 years ago

5 0

They are salts and are all ionic compounds because in the formula one of the element has to have a positive and the other a negative charge.

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How long would it take to reduce 1 mole of each of the following ions using the current indicated? Assume the voltage is suffici

Vilka [71]

Explanation:

(a) It is given that for $Al^{3+}$ value of current is 1.234 A.

Hence, total charge Q = $\frac{3 mol e^{-} \times 96485 C}{1.00 mol e^{-}}$

= 289455 C

Now, we will calculate the time as follows.

t = $\frac{Q}{I}$

= $\frac{289455 C}{1.234 C/s}$

= 234566.4506 s

or, = $\frac{234566.4506 s}{3600 s} \times 1 hr$

= 65.16 hr

(b) It is given that for $Ca^2+$ , value of current is 22.2 A.

Hence, its total charge Q = $\frac{2 mol e^- \times 96485 C}{1.00 mol e^-}$

= 192970 C

Now, we will calculate the time as follows.

t = $\frac{Q}{I}$

= $\frac{192970 C}{22.2 C/s}$

= 8692.34 s

or, = 2.4 hr

(c) It is given that for $Cr^5+$ , value of current is 37.45 A.

Hence, the total charge Q = $\frac{5 mol e^{-} \times 96485 C}{1.00 mol e^{-}}$

= 482425 C

Now, we will calculate the time as follows.

t = \frac{Q}{I}[/tex]

= \frac{482425 C}{37.45 C/s}[/tex]

= 12881.8 s

or, = 3.6 hr

(d) It is given that for $Au^{3+}$ , value of current is 3.57 A.

Hence, the total charge Q = $\frac{3 mol e^{-} \times 96485 C}{1.00 mol e^{-}}$

= 289455 C

Now, we will calculate the time as follows.

t = $\frac{Q}{I}$

= $\frac{289455 C}{3.57 C/s}$

= 81079.83 s

= 22.5 hr

4 0

3 years ago

Weathering and Erosion Unit Test

11Alexandr11 [23.1K]

Crustal deformation builds landforms when two tectonic plates start to push into each other they can rise up and build mountains, or when they sink under, they create valleys.

<h3>How crustal deformation builds landforms?</h3>

Tectonic pressure in a crust can cause folding. Folding can end up with the formation of valleys and mountains so we can conclude that when two tectonic plates start to push into each other they can rise up and build mountains, or when they sink under, they create deep valleys.

Learn more about plates here: brainly.com/question/16939139

5 0

2 years ago

Draw the structure of the major nitration product from the reaction of nitric acid with 1,3‑dimethylbenzene. Show all formal cha

solong [7]

The 2,4 and 5 positions are accessible for nitration of 1,3‑dimethylbenzene. The final product is shown in the image attached.

<h3>What is nitration?</h3>

Nitration is a type of reaction in which the nitro group (-NO2) is introduced to an aromatic ring. We have to note that in the compound 1,3‑dimethylbenzene, the 2,4 and 5 positions are accessible for nitration as shown.

Hence, the nitration of 1,3‑dimethylbenzene occurs as shown in the image attached with the compound shown being the major product.

Learn more about nitration: brainly.com/question/5346392