G write the symbols for the cation and anion that make up each ionic compound Co(NO3)2

Answers

Answer 1
Answer:

Answer:

Co(NO_3)_2 is formed of cation, Co^(2+) and anion,NO_3^(-)

Explanation:

Naming of the ionic compounds:-

  • The name of the cation is written first and the the name of the anion is written after the name of the cation separated by single space.
  • The negative ion is written next and a suffix is added at the end of the negative ion. The suffix written is '-ide'.
  • In case of transition metals, the oxidation state are written in roman numerals in bracket in front of positive ions.

Hence, given ionic compound:-

Co(NO_3)_2 is formed of cation, Co^(2+) and anion,NO_3^(-)

Thus, the name must be Cobalt(II) nitrate.


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(II) To make a secure fit, rivets that are larger than the rivet hole are often used and the rivet is cooled (usually in dry ice) before it is placed in the hole. A steel rivet 1.872cm in diameter is to be placed in a hole 1.870cm in diameter in a metal at 22°C. To what temperature must the rivet be cooled if it is to fit in the hole

4.What volume of 0.120 M HNO3(aq) is needed to
completely neutralize 150.0 milliliters of 0.100 M
NaOH(aq)?
A. 62.5 mL
B. 125 ml
C.
180. mL
D. 360. mL

Answers

Answer:

B) 125 mL

Explanation:

M1V1=M2V2

(0.120M)(x)=(150.0 mL)(0.100M)

x= 125 mL

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What type of hybridization is needed to explain why ethyne, C2H2, is linear?

Answers

When C-C is having a triple bond the hybridization is sp. But I am not sure how to relate that to the linear shape.

Does the molarity of the solution change with the change in temperature?Match the words in the left column to the appropriate blanks in the sentences on the right.

Answers

Answer:

Yes, molarity changes according to temperature.

Explanation:

Molarity equals to moles over volume

which can be also said;

Molarity = moles of solute / liters of solution

Well, the volume or liters of the solution depends on temperature.

If the temperature is high then the volume will be higher where the molarity decreases.

NEED HELP!
C=46.67%, H=4.48%, N=31.10%, O=17.76%.
The molecular weight is 180.16g/mol.

Answers

Answer:

C_7H_8N_4O_2

Explanation:

Hello!

In this case, since the determination of an empirical formula is covered by first computing the moles of each atom as shown below:

n_C=(46.47g)/(12g/mol)=3.9mol\n\n n_H=(4.48g)/(1g/mol) =4.5mol\n\nn_N=(31.10g)/(14g/mol) =2.2mol\n\nn_O=(17.76g)/(16g/mol) =1.1mol

Now, we divide each moles by the fewest moles (those of oxygen), to obtain the subscripts in the empirical formula:

C:(3.9)/(1.1)=3.5 \n\nH:(4.5)/(1.1)=4 \n\nN:(2.2)/(1.1) =2\n\nO:(1.1)/(1.1) =1

Thus, the empirical formula, taken to the nearest whole subscript is:

C_7H_8N_4O_2

Whose molar mass is 180.16, therefore the empirical formula is the same to the molecular one.

Best regards!

Calculate the solubility of CuX (Ksp=[Cu2+][X2−]=1.27×10−36) in a solution that is 0.200 M in NaCN.I have already tried to square root the Ksp value to get the answer but it was wrong.

Answers

Answer:

Solubility= 1.08×10-12

Explanation:

Take the cube root of 1.27×10-36

Answer:

The solubility of CuX is 1.425x10⁻⁷M

Explanation:

Given:

initial concentration of NaCN=0.2M

Ksp=1.27x10⁻³⁶

The reaction are:

CuX → Cu²⁺ + X²⁺, Ksp=1.27x10⁻³⁶

Cu²⁺ + 4CN⁻ → (Cu(CN)₄)²⁻, Kf=1x10²⁵

The overall reaction is:

CuX + 4CN⁻ → (Cu(CN)₄)²⁻ + X²⁺

The equilibrium constant is:

K=Ksp*Kf=1.27x10⁻³⁶*1x10²⁵=1.27x10⁻¹¹

              CuX      +        4CN⁻      →       (Cu(CN)₄)²⁻ +        X²⁺

I              -                      0.2                    0                         0

C            -                       -4                     +x                        +x

E             -                      0.2-4                x                          x

The equation for equilibrium is:

K=([Cu(CN)4]^(2) [X])/([CN]^(4) ) \n1.27x10^(-11) =(x^(2) )/((0.2-x)^(4) )

Here, solving for x:

x=1.425x10⁻⁷M=CuX

A substance with a high boiling point will also likely have A) a low melting point B) a low vapor pressure C) weak intermolecular interactions D) low surface tension E) low viscosity

Answers

Answer: Option (B) is the correct answer.

Explanation:

Boiling point is defined as the temperature at which vapor pressure of a liquid becomes equal to the atmospheric pressure.

Surface tension is defined as the attractive forces experienced by the surface molecules of a liquid by the molecules present beneath the surface layer of the liquid. More stronger are the intermolecular forces present within the molecules of a liquid more will be its surface tension and lower will be its vapor pressure.

Hence, higher will be the boiling point of the liquid.

And, viscosity is defined as the ability of a liquid to resist its flow. When a substance has high viscosity then it is known as a viscous substance.

Thus, we can conclude that a substance with a high boiling point will also likely have a low vapor pressure.