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
olasank [31]
3 years ago
5

Help please !!!

Chemistry
2 answers:
steposvetlana [31]3 years ago
6 0
I believe it’s friction transfers kinetic energy to heat
Rom4ik [11]3 years ago
6 0

Answer: A

Explanation: I hope this help:]

You might be interested in
90.00 ml of 0.25 M calcium hydroxide are required to titrate 100.00 ml of hydrochloric acid. What is the molarity of the HCI?
bezimeni [28]

Answer:

50000mm u add subtract multiply divide

Explanation:

4 0
3 years ago
Calculate the solubility at 25°C of CuBr in pure water and in a 0.0120M CoBr2 solution. You'll find Ksp data in the ALEKS Data t
iragen [17]

Answer:

S = 7.9 × 10⁻⁵ M

S' = 2.6 × 10⁻⁷ M

Explanation:

To calculate the solubility of CuBr in pure water (S) we will use an ICE Chart. We identify 3 stages (Initial-Change-Equilibrium) and complete each row with the concentration or change in concentration. Let's consider the solution of CuBr.

    CuBr(s) ⇄ Cu⁺(aq) + Br⁻(aq)

I                       0             0

C                     +S           +S

E                       S             S

The solubility product (Ksp) is:

Ksp = 6.27 × 10⁻⁹ = [Cu⁺].[Br⁻] = S²

S = 7.9 × 10⁻⁵ M

<u>Solubility in 0.0120 M CoBr₂ (S')</u>

First, we will consider the ionization of CoBr₂, a strong electrolyte.

CoBr₂(aq) → Co²⁺(aq) + 2 Br⁻(aq)

1 mole of CoBr₂ produces 2 moles of Br⁻. Then, the concentration of Br⁻ will be 2 × 0.0120 M = 0.0240 M.

Then,

    CuBr(s) ⇄ Cu⁺(aq) + Br⁻(aq)

I                       0           0.0240

C                     +S'           +S'

E                       S'            0.0240 + S'

Ksp = 6.27 × 10⁻⁹ = [Cu⁺].[Br⁻] = S' . (0.0240 + S')

In the term (0.0240 + S'), S' is very small so we can neglect it to simplify the calculations.

S' = 2.6 × 10⁻⁷ M

8 0
2 years ago
How does photosynthesis and cellular respiration depend on each other
Monica [59]

Photosynthesis is the process where plants create energy. It requires water, carbon dioxide and sunlight. The end result is glucose, which the plants consume, and oxygen. Cellular respiration requires oxygen and glucose. The end result is carbon dioxide, ATP, and water.

7 0
3 years ago
Magnesium has three naturally occurring isotopes with masses of 23.99 amu, 24.99 amu, and 25.98 amu and natural abundances of 78
mihalych1998 [28]

Answer:24.31

Explanation:Contribution made by isotope of mass 23.99= 23.99×78.99=1894.97

Contribution made by isotope of mass 24.99=24.99×10.00=249.9

Contribution made by isotope of mass 25.98=25.98×11.01=286.04

Total contribution=1894.97+249.9+286.04=2430.91

Average mass=2430.91÷100

=24.31

3 0
2 years ago
During which change of state do atoms lose energy
alexgriva [62]

Answer: Atoms lose energy as a gas changes to a solid.

Explanation:

6 0
2 years ago
Read 2 more answers
Other questions:
  • How many grams are in 88.1 moles of magnesium?
    11·1 answer
  • The product formation was decreased when a substance b was added to an enzyme reaction. more substrate being added did not incre
    13·1 answer
  • In a sample of oxygen gas at room temperature, the average kinetic energy of all the balls stays constant. Which postulate of ki
    5·1 answer
  • A solid turning into a gas in a chemical or a physical change?
    13·1 answer
  • Which of the following is true of the mass of an object?
    13·1 answer
  • Some nickel sulfate solution was carefully placed in the bottom of a beaker of water. The beaker was then covered and left for s
    9·1 answer
  • When does the composition of a substance does not change?
    12·1 answer
  • What is Sublimation!?​
    7·1 answer
  • What are some characteristic properties of elements to the left of the elements along the ""staircase""? To the right?
    8·1 answer
  • What is pure substance<br>subscribe this channel​
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!