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
QveST [7]
3 years ago
5

I don’t get this please help!!

Chemistry
1 answer:
kodGreya [7K]3 years ago
6 0
OK,lisen to me slowly,
all define you.all thing


1.Look at peridoic table which one is solid or others.
For example:hydrogen is air.
And you gonna explain what is hydrogen,

2.After look periodic table you will be able to know every element.

3.Dont forget to check your homework.!!

You might be interested in
All matter can be classified by their physical properties. Which substance can be classified as being soluble in water
My name is Ann [436]
The substance that can be classified as being soluble in water would be salt. The solution is D. Salt specifically is composed of ions and the ionic compound dissociates within water.
4 0
3 years ago
Fe(NO3)2 not sure how to get the oxidation numbers of all elements
Shtirlitz [24]
You must remember that oxidation number of hydrogen in acids is always +1, oxidation number of oxygen in oxides & acids is always -2... metals has always oxidation number on plus!

group NO3 comes from HNO3...and oxidation number of whole acid group is always on minus and equal to the amount of hydrogen atoms in this acid... so oxidation number of NO3 = -1

we have 2 NO3 groups so 2*(-1) = -2 and that is the reason why oxidation number of Fe in this formula must be +2... because sum of all elements always gives 0!

Now we could count of oxidation number for nitrogen... we write HNO3 and start counting from right to left:
3*(-2) from oxygens + 1 from hydrogen = -5
so nitrogen must have +5 oxidation number... because sum all in formula must be 0.


4 0
2 years ago
Which of the following is an oxidation? Select all that apply
butalik [34]

Answer:

2Na=Ca(OH)000.1 AgBr=2KF 2KBr=LiNO

7 0
2 years ago
At the end of the last lesson, you learned there was not enough carbon dioxide in the biodome air, which led to a decrease in en
lakkis [162]

There may be too many plants present or too few animals in the biodome hence the decrease in carbon dioxide .

<h3>What is a biodome?</h3>

The term biodome refers to an artificially buit ecosystem. We must recall that an ecosystem is a self sustaining unit in which materials and energy are exchanged.

If there is less carbon dioxide in the biodome then it means that there are too many plants present or too few animals in the biodome.

Learn more about ecosystem: brainly.com/question/1673533

4 0
2 years ago
Four moles of hydrogen chloride (HCl) gas react with one mole of oxygen (O2) gas to produce two moles of chlorine gas (Cl2) and
Marianna [84]

Answer:

4HCl(g) + O₂(g) →  2Cl₂(g) + 2H₂O(g)

Explanation:

In order to find the equation we should state:

The reactants → Hydrogen chloride (HCl) and oxygen (O₂)

The products → Chlorine gas (Cl₂) and water gas (H₂O)

The balanced equation is:

4HCl + O₂  →  2Cl₂ + 2H₂O

It is a redox reaction, where the oxygen reduces to make water, and the chloride is oxidized to produce elemental chlorine.

7 0
3 years ago
Read 2 more answers
Other questions:
  • 1) Assume element X has 2 isotopes: X-125 and X-126. For every 100 atoms of X, 30 of them have a mass of 125.0 u and 70 have a m
    12·2 answers
  • Two gas samples have the same number of molecules, the same volume, and the same pressure. Which of the following could be true?
    7·1 answer
  • Chromium (Cr) can combine with chlorine (Cl2) to form chromium chloride (CrCl3). Which equation is a correct representation of t
    13·2 answers
  • The vapor pressure of liquid chloroform, CHCl3, is 400.0 torr at 24.1 °C and 100.0 torr at –6.3 °C. What is DeltaH of vaporizati
    12·1 answer
  • Particles vibrate in a rigid structure and<br> do not move relative to their neighbors.
    15·2 answers
  • An object will float when:
    7·2 answers
  • Volume (at STP) of 5.2x10^26 molecules of CH4?
    10·1 answer
  • The following half-reaction can be balanced in acidic solution:
    5·1 answer
  • How many continents out of the 7 are completely surrounded by water?
    9·2 answers
  • For each pair circle the neutral element with the largest atomic radius K or Cs ,Ti or As ,Br or F
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!