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
Daniel [21]
3 years ago
12

Consider that the room is a closed system. Ryan uses the chemical energy in his muscles to create the energy of motion. He uses

this energy of motion to pull the string on the clapper of a bell to produce a sound. Sound fills the room.
Which describes the energy in this room?



A.
As energy changes forms, total energy decreases.


B.
As energy changes forms, total energy increases.


C.
While energy is changing forms, total energy at first increases, then decreases.


D.
While energy has taken different forms, total energy remains the same.
Chemistry
2 answers:
Vilka [71]3 years ago
6 0
D.

This is in accordance with the law of conservation of energy.
Natasha2012 [34]3 years ago
6 0

Answer:

I belive its D.

You might be interested in
When the pH is high, what is tue concentration of hydrogen ions in a solution
joja [24]
Lowered cos the higher the ph the lower the hydrogen ions
5 0
3 years ago
Read 2 more answers
A solution of LiCl in water has XLiCl = 0.0800. What is the molality? A solution of LiCl in water has XLiCl = 0.0800. What is th
Kay [80]

Answer:

mol LiCl = 4.83 m

Explanation:

GIven:

Solution of LiCl in water XLiCl = 0.0800

Mol of water in kg = 55.55 mole

Find:

Molality

Computation:

mole fraction = mol LiCl / (mol water + mol LiCl)

0.0800 = mol LiCl / (55.55 mol + mol LiCl)

0.0800 mol LiCl + 4.444 mol = mol LiCl

mol LiCl - 0.0800 mol LiCl = 4.444 mol

0.92 mol LiCl = 4.444 mol

mol LiCl = 4.83 m

7 0
3 years ago
Please help me with this honestly I'm clueless It's 7th science work......please help
olganol [36]
Hiii
3. describe the physical characters that can be observed: phenotype

6. a specific characteristic of an organism: trait

7. a section of DNA that provides instructions for specific traits: genes

8. allele expressed in the phenotype even if only one copy is present in the genotype: dominant

hope this helped :)
6 0
3 years ago
Read 2 more answers
Explain why ethics and skepticism are integral to science.
sdas [7]

Ethics and Skepticism are integral to science because they are the basis for the need to lay explanations on various fields of science through experiment. This will enable science bring the right data and arguments through scientific methods in an accurate and a straight forward manner.

Hope this helped have an awesome day :)

8 0
3 years ago
What volume of 0.152 M KMnO4 solution would completely react with 20.0 mL of 0.381 M FeSO4 solution according to the following n
ANEK [815]

<u>Answer:</u> The volume of permanganate ion (potassium permanganate) is 10.0 mL

<u>Explanation:</u>

To calculate the number of moles for given molarity, we use the equation:

\text{Molarity of the solution}=\frac{\text{Moles of solute}}{\text{Volume of solution (in L)}}     .....(1)

Molarity of ferrous sulfate solution = 0.381 M

Volume of solution = 20.0 mL = 0.020 L   (Conversion factor: 1 L = 1000 mL)

Putting values in equation 1, we get:

0.381M=\frac{\text{Moles of ferrous sulfate}}{0.020L}\\\\\text{Moles of ferrous sulfate}=(0.381mol/L\times 0.020L)=0.00762mol

For the given chemical equation:

5Fe^{2+}+8H^++MnO_4^-\rightarrow 5Fe^{3+}+Mn^{2+}+4H_2O

By Stoichiometry of the reaction:

5 moles of iron (II) ions (ferrous sulfate) reacts with 1 mole of permanganate ion (potassium permanganate)

So, 0.00762 moles of iron (II) ions (ferrous sulfate) will react with = \frac{1}{5}\times 0.00762=0.00152mol of permanganate ion (potassium permanganate)

Now, calculating the volume of permanganate ion (potassium permanganate) by using equation 1, we get:

Molarity of permanganate ion (potassium permanganate) = 0.152 M

Moles of permanganate ion (potassium permanganate) = 0.00152 mol

Putting values in equation 1, we get:

0.152mol/L=\frac{0.00152mol}{\text{Volume of permanganate ion (potassium permanganate)}}\\\\\text{Volume of permanganate ion (potassium permanganate)}=\frac{0.00152mol}{0.152mol/L}=0.01L=10.0mL

Hence, the volume of permanganate ion (potassium permanganate) is 10.0 mL

3 0
3 years ago
Other questions:
  • A. What is the chemical reaction between hydrogen and sulfur?
    6·1 answer
  • Which is an example of human impact on climate changes?
    6·2 answers
  • An atom of argon in the ground state tends not to bond with an atom of a different element because the argon atom has (a)a total
    5·2 answers
  • Which characteristic is used to identify minerals?
    9·2 answers
  • Suppose 870.mmol of electrons must be transported from one side of an electrochemical cell to another in 84. seconds. Calculate
    11·1 answer
  • 73.5 grams C, 4.20 grams H, and 72.3 grams Cl. What is the percent composition of each element in this compound?
    12·1 answer
  • What is the partial pressure of a gas mixture in a mixture of gases?
    5·2 answers
  • If the pH is 9, what is the concentration of hydroxide ion?
    9·1 answer
  • What generally is the current level of deforestation in the United States
    7·1 answer
  • What percentage of incoming college students did not consume any alcohol?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!