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
aleksandrvk [35]
3 years ago
13

At constant pressure, which of these systems do work on the surroundings? Check all that apply.

Chemistry
1 answer:
MariettaO [177]3 years ago
5 0
A(g) + B(g) → 3C(g)

This is because the volume of gas after reaction is greater than that before the reaction (because there are more moles in the product than in the reactants) so the system's boundary will have to expand in order to maintain constant pressure; this means that the system will do work on its surroundings.
You might be interested in
Pour a few drops of coconut oil in water. Write down the observations. Is oil soluble in water? Give reason.​
Free_Kalibri [48]

Answer:

h

Explanation:

what genre does it mean

8 0
2 years ago
Read 2 more answers
21-B. Mn was used as an internal standard for measuring Fe by atomic absorption. A standard mixture containing 2.00 mg Mn/mL and
Korvikt [17]

Answer:

0.0693M Fe

Explanation:

It is possible to quantify Fe in a sample using Mn as internal standard using response factor formula:

F = A(analyte)×C(std) / A(std)×C(analyte) <em>(1)</em>

Where A is area of analyte and std, and C is concentration.

Replacing with first values:

F = 1.05×2.00mg/mL / 1.00×2.50mg/mL

<em>F = 0.84</em>

In the unknown solution, concentration of Mn is:

13.5mg/mL × (1.00mL/6.00mL) = <em>2.25 mg Mn/mL</em>

Replacing in (1) with absorbances values and F value:

0.84 = 0.185×2.25mg/mL / 0.128×C(analyte)

C(analyte) = <em>3.87 mg Fe / mL</em>

As molarity is moles of solute (Fe) per liter of solution:

\frac{3.87 mg Fe}{mL} \frac{1g}{1000mg} \frac{1mol}{55.845g} \frac{1000mL}{1L} = <em>0.0693M Fe</em>

7 0
3 years ago
Read 2 more answers
Which of the following is the correct model of C6H14?
asambeis [7]

Answer:

This question is incomplete

Explanation:

This question is incomplete because of the absence of options. However, the compound C₆H₁₄ is hexane. Hexane is a member of saturated hydrocarbons (homologous series) called alkanes (with the general formula CₙH₂ₙ₊₂). The structure for an hexane is shown below

     H   H   H   H   H   H

      I     I    I     I     I     I

H - C - C - C - C - C - C - H

      I     I     I    I      I    I

     H   H   H   H    H  H

which can also be written as

CH₃CH₂CH₂CH₂CH₂CH₃

3 0
2 years ago
Read 2 more answers
PLEASE HELP ASAP
Leni [432]

Answer:

the answer is B

Explanation:

the answer is B

4 0
3 years ago
Read 2 more answers
How many atoms of potassium are in 0.250 mol of potassium carbonate, k2co3?
Verizon [17]
The  number  of  potassium  atom  that  are  in  0.25  moles   potassium  carbonate  is  calculated  as  follows

by  use  of Avogadro  contant

1  mole=  6.02  x10^23   atoms

what  about  0.25 moles,   
by  close  multiplication

{0.250 moles  x 6.02  x10^23}  /  1 mole  =  1.505  x10^23  atoms
4 0
3 years ago
Other questions:
  • Why does it take a large truck longer to stop than a compact car, even though both are traveling at the same velocity?
    9·2 answers
  • Explain one of the theories on how post-it notes work
    9·1 answer
  • What question can help u determine whether silver underwent is a chemical change or physical change
    11·1 answer
  • Consider the half reactions below for a chemical reaction.
    8·2 answers
  • Convert the boiling temperature of liquid ammonia, -28.1 degree fahrenheit, into degrees celsius and kelvin.
    6·1 answer
  • When iron reacts with oxygen, it forms iron oxide, or rust.
    9·1 answer
  • For each of the scenarios, determine if the ionic strength of the solution would increase, decrease, or not change. Ignore any e
    8·1 answer
  • Which →two← factors decrease as the kinetic energy of the particles in an object decreases?
    5·2 answers
  • A student combines a clear, dark blue solution with a clear, colorless solution and agitates the test tube. The combination resu
    14·1 answer
  • Aqua regia, a mixture of concentrated HNO₃ and HCl, was developed by alchemists as a means to "dissolve" gold. The process is a
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!