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
hodyreva [135]
3 years ago
14

When molecules are joined I an ordered structure​

Chemistry
1 answer:
olga2289 [7]3 years ago
5 0

Answer:

ice

Explanation:

You might be interested in
Help!! Hurry!! I will mark brainliest if you get it correct. NO SPAM!!!!!!
Lelechka [254]

Answer:

216/84 Po + 4/2 He a

Explanation:

6 0
2 years ago
Read 2 more answers
List in ascending order the different layers of atmosphere, their heights, and main their features. Help please!!! :•)
Anika [276]

Answer:

Troposphere

Stratosphere

Mesosphere

Thermosphere

Exosphere

Explanation:

These are all listed in ascending order, hope this helps!

6 0
3 years ago
Alkaline earth metals are very reactive because of how many valence electrons ?
Alborosie
Their is 2 valence electrons
8 0
3 years ago
Which remains the same as the distance of an object from Earth changes?
zvonat [6]

Answer:

its mass which is C

Explanation:

3 0
3 years ago
If the K a Ka of a monoprotic weak acid is 7.3 × 10 − 6 , 7.3×10−6, what is the pH pH of a 0.40 M 0.40 M solution of this acid?
olga_2 [115]

Answer:

pH =3.8

Explanation:

Lets call the monoprotic weak acid HA, the dissociation equilibria in water will be:

HA + H₂O   ⇄ H₃O⁺ + A⁻    with  Ka = [ H₃O⁺] x [A⁻]/ [HA]

The pH is the negative log of the H₃O⁺ concentration, we know the equilibrium constant, Ka and the original acid concentration. So we will need to find the [H₃O⁺] to solve this question.

In order to do that lets set up the ICE table helper which accounts for the species at equilibrium:

                          HA                                   H₃O⁺                          A⁻          

Initial, M             0.40                                   0                              0

Change , M          -x                                     +x                            +x

Equilibrium, M    0.40 - x                              x                               x

Lets express these concentrations in terms of the equilibrium constant:

Ka = x² / (0.40 - x )

Now the equilibrium constant is so small ( very little dissociation of HA ) that is safe to approximate 0.40 - x to 0.40,

7.3 x 10⁻⁶ = x² / 0.40  ⇒ x = √( 7.3 x 10⁻⁶ x 0.40 ) = 1.71 x 10⁻³

[H₃O⁺] = 1.71 x 10⁻³

Indeed 1.71 x 10⁻³ is small compared to 0.40 (0.4 %). To be a good approximation our value should be less or equal to 5 %.

pH = - log ( 1.71 x 10⁻³ ) = 3.8

Note: when the aprroximation is greater than 5 % we will need to solve the resulting quadratic equation.

4 0
3 years ago
Other questions:
  • i have a mixture of a tomato sauce, sugar, and carrots i bring a magnet close by. what does the magnet pick up and what is left
    11·1 answer
  • A chemist is trying to classify an unknown substance as either a metal or nonmetal. What question should the chemist use to help
    11·1 answer
  • A dam is used to retain water. Retaining water can also lead to flooding. Which most likely would be a new societal issue result
    6·2 answers
  • What mass in grams of ethylene oxide is needed to react with 18 g of water?
    15·1 answer
  • How can acid rain affect organisms that live in the water?
    8·1 answer
  • Members of which group easily lose an electron to form a +1 cation?
    15·1 answer
  • Hydrogen peroxide decomposes spontaneously to yield water and oxygen gas according to the following reaction equation. 2H202(aq)
    5·1 answer
  • Which molecule is an alkyne?
    11·1 answer
  • What is the lewis structure for silicon tetrachloride, SiCl4?
    14·1 answer
  • Which of the following are physical properties of matter?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!