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
Alexxx [7]
3 years ago
5

What could cause a test tube to crack?

Chemistry
2 answers:
ladessa [460]3 years ago
7 0
Heat they’re not meant to be used with hot chemicals
Molodets [167]3 years ago
5 0

Answer:

heated test tube in cold water

You might be interested in
he rate constant of a certain reaction is known to obey the Arrhenius equation, and to have an activation energy . If the rate c
Leya [2.2K]

The question is incomplete, here is the complete question:

The rate constant of a certain reaction is known to obey the Arrhenius equation, and to have an activation energy Ea = 71.0 kJ/mol . If the rate constant of this reaction is 6.7 M^(-1)*s^(-1) at 244.0 degrees Celsius, what will the rate constant be at 324.0 degrees Celsius?

<u>Answer:</u> The rate constant at 324°C is 61.29M^{-1}s^{-1}

<u>Explanation:</u>

To calculate rate constant at two different temperatures of the reaction, we use Arrhenius equation, which is:

\ln(\frac{K_{324^oC}}{K_{244^oC}})=\frac{E_a}{R}[\frac{1}{T_1}-\frac{1}{T_2}]

where,

K_{244^oC} = equilibrium constant at 244°C = 6.7M^{-1}s^{-1}

K_{324^oC} = equilibrium constant at 324°C = ?

E_a = Activation energy = 71.0 kJ/mol = 71000 J/mol   (Conversion factor:  1 kJ = 1000 J)

R = Gas constant = 8.314 J/mol K

T_1 = initial temperature = 244^oC=[273+244]K=517K

T_2 = final temperature = 324^oC=[273+324]K=597K

Putting values in above equation, we get:

\ln(\frac{K_{324^oC}}{6.7})=\frac{71000J}{8.314J/mol.K}[\frac{1}{517}-\frac{1}{597}]\\\\K_{324^oC}=61.29M^{-1}s^{-1}

Hence, the rate constant at 324°C is 61.29M^{-1}s^{-1}

8 0
3 years ago
Is anyone else's brainly not working or is mine the only one that is tweaking?
omeli [17]
Mine tweaking as well
5 0
3 years ago
Which of the following statements is true of glare control?
galina1969 [7]
The correct option is B. 
Indirect lighting refers to fixtures which direct the light upward to bounce off the wall or ceiling to light a room. This type of lighting is diffusely reflected and create less glare compare to direct lighting. Direct lighting usually direct the light downward, directly on to the surface below to provide illumination.
8 0
3 years ago
Thin, flattened, and typically curved bones, such as the ribs and sternum, form __________ bones.
pav-90 [236]
<span>Thin, flattened, and typically curved bones, such as the ribs or sternum, form falt bones.

The two main functions of flat bones are protection or provide a large surface for musular attachment.

These are the flat bones of the human body: in the skull, parietal, frontal, occipial, lacrimal, nasal and vomer; scapula; sternum; rib and hip.

</span>
4 0
3 years ago
Read 2 more answers
Explain why a spinning top will not remain in motion forever
AlexFokin [52]
Friction of the air, and the surface it is on
7 0
3 years ago
Read 2 more answers
Other questions:
  • What pigments can you expect to find in the spinach? (Select all that apply.) a. Anthocyanins (blue) b. Carotenes (orange) c. Po
    7·1 answer
  • The product gas is then passed through a concentrated solution of KOH to remove the CO2. After passage through the KOH solution,
    8·1 answer
  • What is the difference between ester and ether
    12·1 answer
  • What is the chemical name for the balanced equation? 2Al+3Pb(NO3)2=2Al(NO3)3+3Pb​
    12·1 answer
  • Which option should a person avoid doing in order to better protect the quality of watersheds?
    15·1 answer
  • If y'all need a quick response to any type of question i'd like to help
    5·1 answer
  • What is the wavelength of a 2.99 Hz wave?
    15·1 answer
  • Iron metal can be obtained from iron ore, iron (III) oxide. When the iron (III) oxide is reacted with carbon monoxide gas it for
    12·1 answer
  • The lowest concentration that can officially reported for any constituent in drinking water is known as the
    11·1 answer
  • determine whether the aqueous solutions of each of the following salts will be acidic, basic, or neutral
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!