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3 years ago

What is the chemical formula for the compound formed between chromium(iii) and the sulfate ion

Chemistry

2 answers:

Anastasy [175]3 years ago

7 0

Cr2(SO4)3 is the formula

zlopas [31]3 years ago

7 0

Answer: The chemical formula of the given compound is $Cr_2(SO_4)_3$

Explanation:

The combination of chromium and sulfate ions leads to the formation of an ionic compound having chemical name as chromium (III) sulfate. The electrons get transferred from chromium atom to sulfate ion.

Chromium is the 24th element of the periodic table. It is a metal and it looses its electrons. The electronic configuration for this element is $1s^22s^22p^63s^23p^64s^23d^{4}$

This element will loose 3 electrons and forms $Cr^{3+}$ ion.

Sulfate ion is a polyatomic ion having chemical formula of $SO_4^{2-}$

By criss-cross method, the oxidation state of the ions gets exchanged and they form the subscripts of the other ions. This results in the formation of a neutral compound.

So, the chemical formula for chromium (III) sulfate is $Cr_2(SO_4)_3$

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Problem Page A gas made up of atoms escapes through a pinhole 0.225 times as fast as H2 gas. Write the chemical formula of the g

Tcecarenko [31]

To determine what gas is this, we use Graham's Law of Effusion where it relates the rates of effusion of gases and their molar masses. We do as follows:

r1/r2 = √(M2 / M1)

Let 1 be the the unkown gas and 2 the H2 gas.

r1/r2 = 0.225
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0.225 = √(2.02 / M1)
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3 years ago

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What is the percentage composition of each element in dinitrogen monoxide, N2O?

Kitty [74]

The correct answer is C :)

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2 years ago

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Carbon's atomic number is 6. this means that it has __________ electrons. after completing the first energy level, carbon has __

ser-zykov [4K]

a) 6 electrons - because atomic number is the same as the electron number

b) 4 - because 6-2=4

c) Covalent bonds - it needs 4 more electrons for a full outer shell.

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3 years ago

The length of Mac’s bedroom is 3m 59cm. Dennis’ bedroom is 2m 89cm longer than Mac’s bedroom. How many centimeters long is Denni

GalinKa [24]

Answer:

6m 48cm

Explanation:

First we can convert the length of Mac's bedroom to centimeters:

As 1 m is equal to 100 cm,

3m 59cm is equal to 300 cm + 59 cm = 359 cm.

As for Dennis' bedroom's information:

2m 89cm = 289 cm

Now we can calculate the length of Dennis' bedroom:

359 cm + 289 cm = 648 cm

Rewriting the answer leaves us with 6m 48cm.

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2 years ago

C₂H₄O₂ + O₂ ➞ CO₂ + H₂O

densk [106]

Answer:

C2H4O2 + 2O2 ==> 2CO2 + 2H2O

Explanation:

Start with the carbons

C2H4O2 + O2 ==> 2CO2 + H2O There are 2 on the left, so you need 2 on the right.

Next deal with the hydrogens. You have 4 on the left so you have to make 4 on the right

C2H4O2 + O2 ==> 2CO2 + 2H2O

The oxygens are the real devil in this question. Be careful how you handle them. There are 2 * 2 = 4 from the CO2 and 2*1 = 2 from the water. The total is 6

Now you can't just put a 3 in front of the O2. There are 2 in the given chemical. So you don't need 6. You need 6 -2 = 4. But the oxygen is O2. You have to divide the 4 by 2 to get 2

C2H4O2 + 2O2 ==> 2CO2 + 2H2O

And that's your answer.

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2 years ago