1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
never [62]
3 years ago
12

How many valence electrons does dichromate ion have?

Chemistry
1 answer:
motikmotik3 years ago
3 0
A dichromate ion has 56 valence electrons. Valence electrons are the electrons that are present in an atom which are responsible or allows the formation of a chemical bond. When you draw the lewis structure of a dichromate ions, you will have to calculate the valence electrons by (6 + 6 + 6 + 6 + 6 + 6 + 6 + 6 + 6 ) – (-2) = 56.
You might be interested in
Who developed the orbital model of the atom?
Nataliya [291]

Answer:

Ernest Rutherford

Explanation:

that's I think

7 0
3 years ago
A chemist dissolves of pure potassium hydroxide in enough water to make up of solution. Calculate the pH of the solution. (The t
Leya [2.2K]

Answer:

12.99

Explanation:

<em>A chemist dissolves 716. mg of pure potassium hydroxide in enough water to make up 130. mL of solution. Calculate the pH of the solution. (The temperature of the solution is 25 °C.) Be sure your answer has the correct number of significant digits.</em>

Step 1: Given data

  • Mass of KOH: 716. mg (0.716 g)
  • Volume of the solution: 130. mL (0.130 L)

Step 2: Calculate the moles corresponding to 0.716 g of KOH

The molar mass of KOH is 56.11 g/mol.

0.716 g × 1 mol/56.11 g = 0.0128 mol

Step 3: Calculate the molar concentration of KOH

[KOH] = 0.0128 mol/0.130 L = 0.0985 M

Step 4: Write the ionization reaction of KOH

KOH(aq) ⇒ K⁺(aq) + OH⁻(aq)

The molar ratio of KOH to OH⁻is 1:1. Then, [OH⁻] = 0.0985 M

Step 5: Calculate the pOH

We will use the following expression.

pOH = -log [OH⁻] = -log 0.0985 = 1.01

Step 6: Calculate the pH

We will use the following expression.

pH + pOH = 14

pH = 14 - pOH = 14 -1.01 = 12.99

8 0
3 years ago
Mass has to do with how many particles
Ganezh [65]

The law of definite proportions agrees with Dalton atomic theory.

What is Dalton atomic theory?

It state that all matters is made of very tiny particles called atom. atoms are individual particles which can not be created or be destroyed in a chemical reactions. Atoms of given elements are identical in mass and chemical properties. Atoms of

different elements have different masses and chemical properties.

The law of definite proportions also known as proust's law ,state that a chemical compound contain the same proportion of elements by mass.this law is one of the stoichiometry .

Thus ,

This is the reason why it is agrees with dalton atomic theory.

To know more about Dalton atomic theory click-

brainly.com/question/13157325

#SPJ1

6 0
1 year ago
Two grams of potassium chloride are completely dissolved in a sample of water in a beaker. This solution is classified as
Eddi Din [679]
The answer is (3) a homogeneous mixture. The difference between homogeneous and heterogeneous mixture is the degree of the mixture being mixed. Due to the completely dissolved and the dissolving ability of KCl, we can get the answer,
5 0
4 years ago
Which of the following statements best explains why Native Americans were overtaken so easily by European settlers?
MaRussiya [10]

Answer:

I don't see any following statements

Explanation:

could you give me some and I'll be happy to help : )

5 0
3 years ago
Read 2 more answers
Other questions:
  • Calcium carbonates are incorporated into the shells of microscopic marine plants and animals and then participate into the ocean
    11·1 answer
  • Liquid octane will react with gaseous oxygen to produce gaseous carbon dioxide and gaseous water . Suppose 8.00 g of octane is m
    13·1 answer
  • How many millimeters of 1.58 M HCl are needed to react completely with 23.2 g of NaHCO3
    14·2 answers
  • How many significant digits are in 0.0038020 ?
    9·1 answer
  • What is the molarity of sodium chloride in solution that is 13.0% by mass sodium chloride and that has a density of 1.10 g/mL?
    12·1 answer
  • What alkene gives a mixture of acetone and propanoic acid on reaction with potassium permanganate in the presence of strong acid
    12·1 answer
  • Calculate the boiling point of a 3.60 m aqueous sucrose solution. express the boiling point in degrees celsius to five significa
    10·2 answers
  • Please help<br>............​
    14·1 answer
  • If you took a spoonful of tea out of the cup, which would be more painful if it spilled on you? *
    14·1 answer
  • How many moles are there in 1 mole of argon?​
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!