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
Pachacha [2.7K]
3 years ago
5

What would happen if a roof was made from wool?

Chemistry
1 answer:
vichka [17]3 years ago
7 0

Answer:

B

Explanation:

it will not be waterproof anymore

You might be interested in
TRUE or FALSE: The charge of an atom (ion) is determined by the ratio of electrons to protons.
Damm [24]
True The positive electric charge of a proton is equal in magnitude to the negative charge of an electron; therefore, the net electric charge of an ion is equal to its number of protons minus its number of electrons. Ions are highly reactive species.
8 0
3 years ago
Read 2 more answers
Please can you help me with this ​
vlabodo [156]

Answer:

C. Pulley.

Explanation:

8 0
2 years ago
What is refraction? * Bending of light<br> Reflection of light
sdas [7]
Refraction is the bending of light (it also happens with sound, water and other waves) as it passes from one transparent substance into another. This bending by refraction makes it possible for us to have lenses, magnifying glasses, prisms and rainbows. Even our eyes depend upon this bending of light. Hope this helps!
6 0
2 years ago
Read 2 more answers
How many hydrogen bonds are between cytosine and guanine
Dahasolnce [82]

Answer:

3

Explanation:

5 0
2 years ago
Read 2 more answers
. What mass of ammonium chloride must be added to 250. mL of water to give a solution with pH
Eduardwww [97]

The mass of ammonium chloride that must be added is : ( A ) 4.7 g

<u>Given data :</u>

Volume of water ( V )  = 250 mL = 0.25 L

pH of solution = 4.85

Kb = 1.8 * 10⁻⁵

Kw = 10⁻¹⁴

Given that the dissolution of NH₄Cl gives NH₄⁺⁺ and Cl⁻ ions the equation is written as :

NH₄CI  +  H₂O  ⇄  NH₃ + H₃O⁺

where conc of H₃O⁺

[ H₃O⁺ ] = \sqrt{Ka.C}   and Ka = Kw / Kb

∴ Ka = 5.56 * 10⁻¹⁰

Next step : Determine the concentration of H₃O⁺  in the solution

pH = - log [ H₃O⁺ ] = 4.85

∴ [ H₃O⁺ ] in the solution = 1.14125 * 10⁻⁵

Next step : Determine the concentration of NH₄CI in the solution

C = [ H₃O⁺ ]² / Ka

  = ( 1.14125 * 10⁻⁵ )² /  5.56 * 10⁻¹⁰

  = 0.359 mol / L

Determine the number of moles of NH₄CI in the solution

n = C . V

  = 0.359 mol / L  * 0.25 L =  0.08979 mole

Final step : determine the mass of ammonium chloride that must be added to 250 mL

mass = n * molar mass

         = 0.08979 * 53.5 g/mol

         = 4.80 g  ≈ 4.7 grams

Therefore we can conclude that the mass of ammonium chloride that must be added is 4.7 g

Learn more about ammonium chloride : brainly.com/question/13050932

8 0
2 years ago
Other questions:
  • Balance the following chemical equation using the smallest set of integers. I₂ + Cl₂ + H₂O ---&gt; HIO₂ + HCl The coefficient on
    13·1 answer
  • a household’s voltage is 120 volts, what is the power rating of a light bulb with 0.5 amps of current flowing through it?
    13·1 answer
  • PLEASE SOMEBODY HELP PLEASE ! I WILL MARK BRAINLY I PROMISE !
    5·1 answer
  • As the mass number of the isotopes of hydrogen increases, the number of protons
    5·1 answer
  • The pKa of an acid depends partly on its environment. Predict the effect of each of the following environmental changes on the p
    15·1 answer
  • How many grams are in 2.30 x 10^23 atoms in Na?
    9·1 answer
  • Is Dioxin chemical ionic or covalent and acidic or basic? Explain
    12·1 answer
  • What is the Lewis dot diagram of ca and br?
    8·1 answer
  • What are the elements names for C9H8O4
    8·1 answer
  • What does the author predict about the future of the Earth's mantle? Do you support his educated guess? Use complete sentences t
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!