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
NemiM [27]
3 years ago
15

Vhen 2.0 moles of magnesium reacts, how many liters of oxygen gas, O2, are needed at STP conditions?

Mathematics
1 answer:
Rasek [7]3 years ago
8 0

Answer:

22.4 litres

Step-by-step explanation:

Reaction:

2Mg (s) + O2 (g) → 2 MgO (s)

From the reaction, we know that 2 moles of Mg (s) react with 1 mol of O2

STP conditions mean:

  • absolute temperature of 273.15 K
  • absolute pressure of 1 atm

Using the equation of state for ideal gases:

PV = nRT

where P is the absolute pressure, T is the absolute temperature, n are the moles, V is the volume, and R is the gas constant = 0.082 atm*L/(mol*K). Solving for V and replacing:

V = nRT/P

V = 1*0.082*273.15/1

V = 22.4 litres

You might be interested in
R = {(-3, -2), (-3, 0), (-1, 2), (1, 2)} Select all numbers that are in the domain. -3 -2 -1 0 1 2
Andrei [34K]

Answer:

-3, -1, 1

Step-by-step explanation:

the x-coordinates are the domain

8 0
3 years ago
SOMEONE PLEASE HELP ME WITH THIS KHAN ACADEMY ASSIGNMENT ASAP
Alchen [17]

Answer:

(8,-4)

Step-by-step explanation:

The difference between A and M is 2.5x and -4y

so B would be 5.5+2.5 and 0-4

(8,-4)

4 0
2 years ago
Solve the quadratic.<br><br><br> 4x^2+4-20=0<br><br><br><br><br> brainlist if you explain
frez [133]

Answer:

  • x = -1/2(1 +√21) ≈ -2.79129
  • x = -1/2(1 -√21) ≈ 1.79129

Step-by-step explanation:

We assume the middle term is supposed to be 4x.

We can remove a common factor of 4 to simplify this a bit.

  x^2 +x -5 = 0

This is of the form

  ax^2 +bx +c = 0

where a=1, b=1, c=-5.

__

The <em>quadratic formula</em> gives the solutions as ...

  x=\dfrac{-b\pm\sqrt{b^2-4ac}}{2a}

Filling in the given coefficients, we have ...

  x = (-1 ±√(1^2 -4·1·(-5)))/(2·1)

  x = (-1±√21)/2

The solutions are x = -1/2(1 +√21) and -1/2(1 -√21).

_____

<em>If what you wrote is what you intend</em>, then the equation simplifies to 4x^2 -16 = 0.

Dividing by 4 and factoring the difference of squares gives ...

  x^2 -4 = 0

  (x -2)(x +2) = 0

These factors are zero (hence their product is 0) for the values x = 2 and x = -2.

The solutions are x=2 and x=-2.

5 0
3 years ago
help Kyle trying to explain to her friend why the placement of an ange and the concept of rigid motions can be used in determini
ivann1987 [24]

Angle b = 31

b=8

c=13

not 100% sure

6 0
2 years ago
My brain is melting. I have no idea how to do this xD
shtirl [24]

Answer:

its 8, so insert to forms of 8!!! so a and c!

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Other questions:
  • Write parametric equations of the line -3x+4y=7
    7·2 answers
  • If all the edges of prism A are multiplied by 5 to create prism B. The volume of prism B will be __________ times the volume of
    5·1 answer
  • Identify the slop and the y-intercept of each line. Having trouble calculating the slop so I was wondering what I did wrong if I
    10·1 answer
  • Solve the equation in the complex number system <br> X^4-2x^2-3=0
    15·1 answer
  • Write the equation of a line that is horizontal and contains the point (-4, 1)
    7·1 answer
  • Find the slope of line passing through the two points, (3, 6) and (3, 2)
    6·2 answers
  • Angle x and angle y are complementary. Angle x is supplementary to a 128 degree angle. What are the measures of angle x and angl
    8·1 answer
  • Which store has the best buy on king-size candy bars?​
    13·1 answer
  • Solve equations using inverse operations HELP NOW!!
    7·2 answers
  • Find the value of f(7). y = f(x)
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!