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
anastassius [24]
2 years ago
15

Question 18 of 35

Chemistry
1 answer:
sammy [17]2 years ago
4 0

Answer:

A. Dark-colored moths become common after tree trunks become

dark.

Explanation:

I took the test

You might be interested in
Which group has the highest ionization energies? Explain why.
katovenus [111]

Answer:

<h2><em>nobel</em><em> </em><em>eleme</em><em>nts</em><em> </em><em>(</em><em>gr</em><em>.</em><em> </em><em>1</em><em>8</em><em>)</em></h2><h2><em> </em><em> </em><em> </em><em> </em><em>be</em><em>cause</em><em> </em><em>they</em><em> </em><em>are</em><em> </em><em>fully</em><em> </em><em>stable</em><em> </em><em>due</em><em> </em><em>to</em><em> </em><em>octet</em><em> </em><em>complete</em></h2>

<em>-</em><em>-</em><em>-</em><em>-</em><em>-</em><em>-</em><em>-</em><em>-</em><em>-</em><em>-</em><em>-</em><em>-</em><em>-</em><em>-</em><em>-</em><em>-</em><em>-</em><em>-</em><em>-</em><em>-</em><em>-</em><em>-</em><em>-</em><em>-</em><em>-</em><em>-</em><em>-</em><em>-</em><em>-</em><em>-</em><em>-</em><em>-</em><em>-</em><em>-</em><em>-</em><em>-</em><em>-</em><em>-</em><em>-</em><em>-</em><em>-</em><em>-</em><em>-</em><em>-</em><em>-</em><em>-</em><em>-</em><em>-</em><em>-</em><em>-</em>

7 0
3 years ago
How many millions of years ago did the earliest marine reptiles evolve from land reptiles?
Nezavi [6.7K]
Roughly 240 million years ago
6 0
3 years ago
Read 2 more answers
Please help me which one
mel-nik [20]
Non of the above because protons and neutrons don’t mix with each one there
3 0
2 years ago
A solution is created by dissolving 11.0 grams of ammonium chloride in enough water to make 235 mL of solution. How many moles o
Amanda [17]

Answer:

The correct answer is 0.206 moles

Explanation:

According to the given scenario, the calculation of the number of moles of ammonium chloride is available in the resulting solution is given below:

Given that

Amount of NH_4Cl is 11.0 grams

And, the volume is 235 mL

Now the molar mass of NH_4Cl is 53.49g/mol

So, the number of moles presented is

= 11.0 ÷ 53.49

= 0.206 moles

hence, the number of moles of ammonium chloride are available in the resulting solution is 0.206 moles

7 0
2 years ago
When the pressure on 2.5 liters of oxygen is decreased from 2.0 atm to 1.0 atm, the volume of the gas
uranmaximum [27]

Answer:

volume of the gas is 5.0L

Explanation:

Using Boyle's law that state the pressure of a gas is inversely proportional to volume of it occupies when temperature is constant, it is possible to write:

P₁V₁ = P₂V₂

<em>Where P is pressure, V is volume and 1 and 2 are initial and final states.</em>

<em />

If initial volume is 2.5L, initial pressure is 2.0atm and 1.0atm is final pressure, final volume is:

2.0atm*2.5L = 1atm V₂

5.0L = V₂

Thus, <em>volume of the gas is 5.0L</em>.

5 0
3 years ago
Other questions:
  • The wavelength of light that has a frenquency of 1.20x10^13s^-1
    9·1 answer
  • How many moles are in 1.84x10^24 formula units of CaCl2, calcium chloride?
    9·1 answer
  • Explain how science can help you make more informed decisions about what to eat.
    6·2 answers
  • How does litmus paper identify a base?
    11·2 answers
  • When paper turns yellow-brown upon exposure to sunlight, what type of change is likely taking place?
    9·1 answer
  • Room temperature is often assumed to be 25∘c. Calculate the molar volume of an ideal gas at 25∘c and 1 atm pressure.
    5·1 answer
  • How many grams are in 4.23E44 particles of PbO2
    8·1 answer
  • Which is true of an element?
    6·2 answers
  • A sample of Kr gas is observed to effuse through a pourous barrier in 8.15 minutes. Under the same conditions, the same number o
    13·1 answer
  • This is my question in imageIf 16.0 grams of aluminum oxide were actually produced, what is the percent yield of the reaction be
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!