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
Juliette [100K]
2 years ago
13

Which of the following uses mechanical energy to function?

Chemistry
2 answers:
elena55 [62]2 years ago
5 0
C is the answer i believe
Tcecarenko [31]2 years ago
4 0
D the rest uses some sort of radiation
You might be interested in
Find the pH of a 0.100 molar H2C6O6 solution with ka, where KA is equal 8.0×10–5​
lubasha [3.4K]

The pH of the solution is 2.54.

Explanation:

pH is the measure of acidity of the solution and Ka is the dissociation constant. Dissociation constant is the measure of concentration of hydrogen ion donated to the solution.

The solution of C₆H₂O₆ will get dissociated as C₆HO₆ and H+ ions. So the molar concentration of 0.1 M is present at the initial stage. Lets consider that the concentration of hydrogen ion released as x and the same amount of the base ion will also be released.

So the dissociation constant Kₐ can be written as the ratio of concentration of products to the concentration of reactants. As the concentration of reactants is given as 0.1 M and the concentration of products is considered as x for both hydrogen and base ion. Then the

K_{a}=\frac{[H^{+}][HB] }{[reactant]}

[HB] is the concentration of base.

8 * 10^{-5} =\frac{x^{2}  }{0.1}\\\\\\x^{2} = 8 * 10^{-5}*0.1

x^{2} = 0.08 * 10^{-4}\\ \\x = 0.283*10^{-2}

Then

pH = - log [x] = - log [ 0.283 * 10^{-2}]\\ \\pH = 2 + 0.548 = 2.54

So the pH of the solution is 2.54.

4 0
3 years ago
Has highest melting point of two bonds
Liono4ka [1.6K]

Answer:

Ionic compounds

Explanation:

7 0
3 years ago
How many joules would be absorbed for the water in Problem 1
9966 [12]

Answer:

5000 cal X 4.184 J/cal =

Explanation:

20,920 jules

8 0
3 years ago
What is the mass of 5.84 × 10^21 atoms of xenon?
podryga [215]

Answer:

5.84e+21

Explanation:

8 0
3 years ago
Why do you think learning about how atomic theory has evolved is important?
tatuchka [14]
I feel like it is important, because it is always nice to learn about new things and keep your mind open, to expand your knowledge.
6 0
3 years ago
Other questions:
  • PLEASE HURRY!! ONLY ANSWER IF YOU KNOW FOR SURE
    8·1 answer
  • Consider the partial equation. Br2 + NaF mc026-1.jpg Which best completes the chemical equation? no reaction Na + FBr2 NaBr + F2
    10·2 answers
  • What is a solution
    13·1 answer
  • What type of chemical bond is hydrogen?
    6·1 answer
  • In 1906, there was a small population of deer on the Kaibab Plateau. Because cows had overgrazed the food on the Kaibab Plateau,
    9·1 answer
  • Cual es el numero de oxidacion de la respiración​
    6·1 answer
  • Can someone help in all 3 question ABC<br>​
    14·1 answer
  • What is the pH of the solution if the [H+] is 1 x 10-12 ?
    15·1 answer
  • Ahhhh someone help me with this
    7·1 answer
  • The rms (root-mean-square) speed of a diatomic hydrogen molecule at 50∘c is 2000 m/s. Note that 1. 0 mol of diatomic hydrogen at
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!