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
quester [9]
4 years ago
11

A temperature change in a reaction indicates

Chemistry
1 answer:
Alex787 [66]4 years ago
7 0
A temperature change in a reaction indicates a “( physical change)”
You might be interested in
A balloon moves vertically upward at
Usimov [2.4K]

Answer:

B. Velocity

Explanation:

The answer is Velocity because the def of velocity is the rate of constant speed in a given direction. I hope this helps, have a good night.

6 0
4 years ago
What is the molarity of silver ion in the final solution
love history [14]
27.8 mg of silver nitrate (AgNO3, 169.9g/mol) was dissolved in water to make 15.00 mL of solution. 8.15 mL of that solution was diluted to make a new solution with a total volume of 1.000L.
3 0
3 years ago
6.) (5 points) Assume you have a system with a fixed pH of 4.0. It is well buffered and therefore the pH will not change. What i
KIM [24]

Answer:

Dissociated state is the predominant one

Explanation:

When a molecule with pKa of 4.52 is in an aqueous solution at pH = 4.0, follows the H-H equation, thus:

pH = pKa + log₁₀ [A⁻] / [HA]

<em>Where [A⁻] is the dissociated state and [HA] represents the protonated state</em>

Replacing:

4.0 = 5.2 + log₁₀ [A⁻] / [HA]

-1.2 = log₁₀ [A⁻] / [HA]

0.063 =  [A⁻] / [HA]

[HA]  = 16 [A⁻]

That means you have 16 times more [HA] than [A⁻] and the <em>dissociated state is the predominant one</em>

7 0
3 years ago
A sample of argon gas at a standard pressure occupies 900 mL at constand temp what volume does the gas occupy if the presure inc
morpeh [17]

Answer:

<em><u>B</u></em><em><u> </u></em><em><u>.</u></em><em><u>8</u></em><em><u>0</u></em><em><u>5</u></em><em><u> </u></em><em><u>mL</u></em>

Explanation:

Here, temperature is constant!

so we can use P1V1=P2V2

P1,V1 is pressure and volume in original condition

and P2V2, pressure and volume in new condition!

now, volume is given 900mL(=V1)

standard pressure is 1 atm i.e, 760mmHg(=P1)

pressure increases to 850mmHg(=P2)

now we have,

P1V1=P2V2

i.e, 760mmHg×900mL=850mmHg×V2

i.e, V2={(900×760)/850 } mL

=804.75 mL

≈805mL

✌️:)

6 0
3 years ago
A temperature of –25°C is equivalent to: Question 2 options: 25 K. 248 K. –25 K. 298 K.\
babunello [35]
First, to convert from C to K, add (C+273)=k
So -25+273=248
6 0
3 years ago
Other questions:
  • An aqueous solution of orthophosphoric acid, H3PO4, has a measured density of 1.2089 g mL-1 and is 5.257 molal. The solution is
    13·1 answer
  • How many moles are in 25.0 grams of KMnO4?
    6·1 answer
  • What is the boiling point of krypton and why
    15·1 answer
  • . If a burning candle is covered by a large glass beaker, the flame will go out. How does the beaker affect the conditions descr
    13·1 answer
  • When a pendulum swings, if it is not continuously pushed it will not stop eventually because some of its energy is changed into.
    14·1 answer
  • A pure sample contains only nitrogen and oxygen atoms. If the sample is 30.4% nitrogen, by weight, what is the empirical formula
    14·1 answer
  • Find the density of an object that has a mass of 12.69 grams and a volume of 3.5cm3
    10·1 answer
  • What is the equation for torque?
    13·1 answer
  • What two elements are commonly found in Mica, Quartz and Feldspar? Explain your answer.
    13·1 answer
  • Malachite green elutes faster from the column than crystal violet so malachite green is the _________ dye.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!