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
4vir4ik [10]
4 years ago
13

Assign an oxidation number to each element in the following species. H2O​

Chemistry
1 answer:
VikaD [51]4 years ago
5 0

Answer:

the oxidation number of hydrogen is +2, while oxygen is -2

You might be interested in
Which statement below correctly describes the relationship between Q and K for both reactions? Are these reactions spontaneous a
nikklg [1K]

Answer:

Q < K for both reactions. Both are spontaneous at those concentrations of substrate and product.

Explanation:

Hello,

In this case, the undergoing chemical reactions with their proper Gibbs free energy of reaction are:

A->B;\Delta _rG^o=-13 kJ/mol

C ->D ;\Delta _rG^o=3.5 kJ/mol

The cellular concentrations are as follows: [A] = 0.050 mM, [B] = 4.0 mM, [C] = 0.060 mM and [D] = 0.010 mM.

For each case, the reaction quotient is:

Q_1=\frac{4.0mM}{0.050mM}=80\\ Q_2=\frac{0.010mM}{0.060mM}=0.167

A typical temperature at a cell is about 30°C, in such a way, the equilibrium constants are:

K_1=exp(-\frac{-13000J/mol}{8.314J/mol*K*303.15K} )=173.8\\K_2=exp(-\frac{3500J/mol}{8.314J/mol*K*303.15K} )=0.249

Therefore, Q < K for both reactions. Both are spontaneous at those concentrations of substrate and product.

Best regards.

6 0
3 years ago
The following Lewis diagram represents the valence electron configuration of a main-group element. This element is in group 2A A
Paraphin [41]

<u>Answer:</u> The symbol of the ion formed is Ca^{2+}

<u>Explanation:</u>

An ion is formed when a neutral atom looses or gains electrons.

  • When an atom looses electrons, it results in the formation of positive ion known as cation.
  • When an atom gains electrons, it results in the formation of negative ion known as anion.

Electronic configuration is defined as the representation of electrons around the nucleus of an atom.

Number of electrons in an atom is determined by the atomic number of that atom.

The element present in Group 2-A and in period 4 is Calcium (Ca)

Electronic configuration of Ca atom:  1s^22s^22p^63s^23p^64s^2

This atom will loose 2 electrons to attain stable electronic configuration similar to Argon element (noble gas)

The electronic configration of Ca^{2+}\text{ ion}=1s^22s^22p^63s^23p^6

Hence, the symbol of the ion formed is Ca^{2+}

4 0
4 years ago
How are acids and bases used by humans
azamat
We use acids and bases in everyday life for cooking and cleaning
6 0
3 years ago
What is one characteristic of a sample of matter that indicates it is a pure substance?
tensa zangetsu [6.8K]

Answer:

One characteristic of a sample of matter that indicates it is a pure substance is the <em>homogeneity of the molecular structure</em><em>.</em>

Explanation:

If the structure is the same all throughout such as liquid water, it is said to be homogenous.

3 0
4 years ago
To draw a Lewis structure, it is not necessary to know
Karolina [17]
This answer to this question is the. Type of atoms in the molecule
8 0
3 years ago
Other questions:
  • metals are malleable because the free flowing blank act as a lubricant and allow the blank to blank over each other
    13·2 answers
  • Lets say I have boiled some water in a pot to the point it turned into gas. Is that a physical or chemical change?
    8·1 answer
  • What type of compound does the formula, Fe2O3, represent ?
    9·1 answer
  • A gas of unknown molecular mass was allowed to effuse through a small opening under constant-pressure conditions. It required 10
    13·1 answer
  • 2' A mixture containing 2.75 gof ammonium chloride (NH4cl) in 5.0 g of water was heated to dissolve the solid and then allowed t
    6·1 answer
  • How do isotopes of a givin element similar
    5·2 answers
  • True or False: Photosynthesis can happen anytime, regardless of the amount of reactants present or the presence of sunlight.
    13·2 answers
  • How many molecules of NH3, are present in a sample of 100.0 grams
    11·1 answer
  • Which product (if any) will form a precipitate in the following reaction?
    8·1 answer
  • With solutions, thank you.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!