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
Illusion [34]
3 years ago
12

Please help as soon as possible

Chemistry
1 answer:
polet [3.4K]3 years ago
6 0

Answer:

A. 2.4 x 10¹⁴ J

Explanation:

m (mass) = 2.7 x 10⁻³ kg

c = 3.0 x 10⁸ m/s

Plug these numbers into the equation E=mc²

E=mc²

E= (2.7 x 10⁻³)(3.0 x 10⁸)²

E= 2.43 x 10¹⁴

So, the answer is A. 2.4 x 10¹⁴ J.

You might be interested in
A chemist dissolves of pure hydroiodic acid in enough water to make up of solution. Calculate the pH of the solution. Be sure yo
Gre4nikov [31]

Answer:

1.76

Explanation:

There is some info missing. I think this is the original question.

<em>A chemist dissolves 660.mg of pure hydroiodic acid in enough water to make up 300.mL of solution. Calculate the pH of the solution. Be sure your answer has the correct number of significant digits.</em>

<em />

Step 1: Calculate the molarity of HI(aq)

M = mass of solute / molar mass of solute × liters of solution

M = 0.660 g / 127.91 g/mol × 0.300 L

M = 0.0172 M

Step 2: Write the acid dissociation reaction

HI(aq) ⇄ H⁺(aq) + I⁻(aq)

HI is a strong acid, so [H⁺] = 0.0172 M

Step 3: Calculate the pH

pH = -log [H⁺]

pH = -log 0.0172

pH = 1.76

5 0
3 years ago
How many moles of salt are in 13.8 g of sodium chloride?
Hoochie [10]

Answer: 0.24 moles

Explanation:

Molecular Mass of NaCl (23 + 35.5) = 58.5g

58.5g of Sodium Chloride -------> 1 mole of NaCl

∴ 13.8g of Sodium Chloride  ------>  1 ÷58.5 x  13.8 = 0.2358974  ≈    0.24moles

                                                         -  

3 0
3 years ago
Read 2 more answers
Balancing chemical equations
mojhsa [17]

<span>2H2 + O2 → 2H2O</span>

<span>
</span>

<span>okay???</span>

<span>
</span>

4 0
3 years ago
By studying the distribution of different types of fossils, geologists have determined that some plates have traveled great dist
WITCHER [35]

Answer:

A. Fossils of organisms that lived in warm climates have been found in arctic environments.

Explanation:

One of the logic used by Geologists to justify plate movement over a region of space is that the fossils of organisms that lived in warm climates have been found in arctic environments.

  • this is as a result of plate tectonics.
  • organisms that are well adapted to warm climates in times past have their relics preserved as fossils.
  • their fossils are no found today around the arctic environment which are cold
  • this suggests that the plate must have drifted or moved
6 0
2 years ago
A piston is pressurized to 15.5 psi at 405 K. If the piston compresses the air, from 8.98 L to 7.55 L, and the pressure drops to
masya89 [10]

Answer:

239.45 K

Explanation:

Ideal gas law formula is P1V1T2=P2V2T1

Rearrange that to get...

T2=T1P2V2/P1V1

Fill in the values and solve.

7 0
2 years ago
Other questions:
  • A bowling ball has a mass of 10.0kg. If a net force of 35N is applied to the ball, what’s the acceleration?
    7·1 answer
  • If you measured 25 g jelly beans and 25 g of
    10·2 answers
  • On many common appliances, there is an “O” or “I” on the power switch. What does each symbol mean?
    13·1 answer
  • Which is apart of the sales process ?
    9·2 answers
  • From the following list of observations, choose the one that most clearly supports the conclusion that electrons have wave prope
    11·1 answer
  • when carbon dioxide is bubbled through lime water the solution first turn milky and to colour less . Explain why these changes o
    10·1 answer
  • What job uses % vol units?
    7·2 answers
  • Look at the diagram. De both lemas and humans have the traits listed at point D? Explain your reasoning​
    15·1 answer
  • strontium-90 has a half life of 29 years. if a site held 4000 kg of this isotope, approximately what mass of strontium-90 would
    8·1 answer
  • What is the frequency of yellow light, which has a wavelength of 5.56 x 10^-7 m?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!