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
xeze [42]
3 years ago
5

Iron is impermeable to air and water true or false

Chemistry
1 answer:
BabaBlast [244]3 years ago
6 0

Answer:

Pure iron is impermeable to air and water, so True.

Explanation:

When corroding, the oxide layer becomes permeable, but water and air cannot pass through pure iron.

I hope this helps! :)

You might be interested in
4. A serving of cereal contains about<br> of protein<br> 9 mg<br> 9 g<br> 90 g<br> 9 kg
aleksandrvk [35]

Answer:

probably 90 g

Explanation:

7 0
3 years ago
Fran hangs three balloons from strings. She gives the first balloon a positive charge. She gives the second balloon a negative c
fgiga [73]

Explanation: We are given three balloon carrying different charges: One having positive charge, one having negative charge and one having no charge.

When we bring positive rod near these three balloons, all of them behave differently.

According to the Coulomb's Law:

Like charges repel each other and unlike charges attract each other.

  • When we bring positive rod towards the balloon having positive charge, the balloon will move away from the rod, because like charges repel each other.
  • When we bring positive rod near negative balloon, the balloon will be attracted to the rod because unlike charges attract each other.
  • But, when we bring positive rod towards the balloon having no charge, the charges will be induced in the balloon. Although the balloon is neutral in nature but it will still carry some +ve or -ve charges. So, when the positive rod is bought near neutral ball, the negative side of the balloon will get attracted towards the rod and positive side will be repelled. From this, we say that the rod has induced some charges in the balloon.
5 0
3 years ago
PLEASE HELP!! ASAP!! WILL MARK BRAINLIEST!!!
sdas [7]

Answer:

Alkali metals are soft and have low melting points.

7 0
3 years ago
Draw the best Lewis structure for NH3 by filling in the bonds, lone pairs, and formal charges. (Assign bonds, lone pairs, radica
kiruha [24]

Answer :  The Lewis-dot structure of NH_3 is shown below.

Explanation :

Lewis-dot structure : It shows the bonding between the atoms of a molecule and it also shows the unpaired electrons present in the molecule.

In the Lewis-dot structure the valance electrons are shown by 'dot'.

The given molecule is, NH_3

As we know that hydrogen has '1' valence electron and nitrogen has '5' valence electrons.

Therefore, the total number of valence electrons in NH_3 = 5 + 3(1) = 8

According to Lewis-dot structure, there are 6 number of bonding electrons and 2 number of non-bonding electrons.

Now we have to determine the formal charge for each atom.

Formula for formal charge :

\text{Formal charge}=\text{Valence electrons}-\text{Non-bonding electrons}-\frac{\text{Bonding electrons}}{2}

\text{Formal charge on N}=5-2-\frac{6}{2}=0

\text{Formal charge on }H_1=1-0-\frac{2}{2}=0

\text{Formal charge on }H_2=1-0-\frac{2}{2}=0

\text{Formal charge on }H_3=1-0-\frac{2}{2}=0

Hence, the Lewis-dot structure of NH_3 is shown below.

3 0
3 years ago
Convert 123 in scientific notation
dalvyx [7]
✡ Answer: 1.23*10^2 ✡


- - Add a decimal at the end (to the right) and count till you get to the first number.
So now you have 1.23

- - Now you always want to times it by 10 to the power of how many times you moved it over, in this case, 2

Final answer: 1.23*10^2

✡Hope this helps✡


4 0
3 years ago
Read 2 more answers
Other questions:
  • Please help with my 1.11 asignment and you get 20 points
    14·1 answer
  • This is the chemical formula for nickel tetracarbonyl (a powerfully poisonous liquid used in nickel refining) Ni(CO)4 A chemical
    10·1 answer
  • 2 H2 + O2 → 2 H2O What is the product of this chemical reaction
    13·1 answer
  • How many valence electrons are available of bonding in bromine(Br)?
    8·2 answers
  • As you move down a group, you will recall that the radius increases. Why do you think an increase in atomic radius would result
    7·1 answer
  • I need help with the true or false
    8·2 answers
  • What my happen in the ecosystem of the fox was removed
    10·1 answer
  • How many Hydrogen (H) Atoms are in Methylene?​
    8·2 answers
  • At 6 atmosphere pressure, the volume of a gas is 1200 ml. What pressure is
    11·1 answer
  • Please help me with this questions
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!