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
Serggg [28]
3 years ago
10

Plz help me well mark brainliest if correct!!

Chemistry
2 answers:
klasskru [66]3 years ago
8 0

Answer:

A

Explanation:

Waxing means getting bigger.

Waning is.. you guessed it... the exact opposite.

I am Lyosha [343]3 years ago
7 0

Answer:

a

Explanation:

..........................

You might be interested in
potassium, k, has an atomic number of 19 and an atomic mass of 39 how many electrons does a neutral atom of K have?
coldgirl [10]
A neutral atom of potassium has 19 electrons.
8 0
4 years ago
Determine the heat given off to the surroundings when 9.0 g of aluminum (fm = 26.98) reacts according to the equation 2al + fe2o
Akimi4 [234]

Hey there!:

Number of moles:

Molar Mass Al = 26.98 g/mol

n = mass / molar mass

n = 9.0 / 26.98

n = 0.3336 moles of Al

Given the reaction :

2 Al + Fe2O3 = Al2O3 + 2 Fe

From the equation, 2 moles of Al give off 849 kJ of heat :

Actual heat given off :

0.3336 / 2 * 849 =

0.3336 / 1698 = 1.4*10² Kj


Hope that helps!


8 0
3 years ago
How many moles of O₂ are needed to react completely with 35.0 mol of FeCl₃? *
galben [10]

Answer:

52.5 mol O2

Explanation:

4 FeCl3 + 6 O2 -> 2 Fe2O3 +6 Cl2

4 mol FeCl3      -> 6 mol O2

35.0 mol FeCl3 -> x

x= (35.0 mol FeCl3 * 6 mol O2)/4 mol FeCl3

x=52.5 mol O2

5 0
3 years ago
Read 2 more answers
What is the best conclusion according to the energy diagram of the chemical reaction?
Mariulka [41]

"The reaction will absorb energy" is the best conclusion according to the energy diagram of the chemical reaction.

<u>Option: B</u>

<u>Explanation:</u>

The chemical bonds in the reactions are broken and formed as per process and contributed by three major steps: reactants, transition phase and product formation. Here transition phase is in equilibrium stage drived by activation energy, where bond is partially formed and partially broken, located at higher energy level then the starters.

The reactant's energy level is less relative to the products as seen in the endothermic reactions' energy diagram, which depicts that  the products are less balanced than reactants. Here when the reaction is forced to the forward direction, then it direct towards the more unbalance entities. As energy is absorbed in the endothermic reaction from surrounding, thus the enthalpy change (ΔH) for the reaction is positive.

5 0
4 years ago
In a strong acid–strong base titration (both monoprotic), if 25.0 milliliters of the base is required to completely neutralize 2
taurus [48]
B)The concentration of the acid (C₁) is the same as that of the base (C₂).

V₁=V₂

n(acid)=C₁V₁
n(base)=C₂V₂

HX + YOH = YX + H₂O

n(acid)=n(base)

C₁V₁=C₂V₂

C₁=C₂
5 0
4 years ago
Read 2 more answers
Other questions:
  • Which choice below correctly completes the sentence? _______ reaches the Earth's surface through _______, then turns into ______
    10·1 answer
  • List at least three properties of matter.
    13·2 answers
  • The force of 20 N acts upon a 5kg block. What is the acceleration of the block?
    9·1 answer
  • Uranium-234 decays to lead-214 through a series of alpha decays. Which of the following is the total number of alpha particles e
    7·1 answer
  • Chemical decontamination can be accomplished with liquids such as chlorox, Lysol, amphyl or a gas such as ethylene oxide.
    15·1 answer
  • Question
    7·1 answer
  • What are the parts of this water wheel system?Label the water wheel to show the matter and forms of energy that flow through the
    10·1 answer
  • Which sentence describes a spontaneous redox reaction between two
    11·1 answer
  • Give the RNA complementary strands of the original strands listed below:
    9·1 answer
  • Determine the number of protons, neutrons, and electrons in the following:
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!