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
stealth61 [152]
3 years ago
9

Nitrate salts (NO3-), when heated, can produce nitrites (NO2-) plus oxygen (O2). A sample of potassium nitrate is heated, and th

e O2 gas produced is collected in a 720 mL flask. The pressure of the gas in the flask is 2.9 atm, and the temperature is recorded to be 319 K. The value of R= 0.0821 atm L/(mol K)
How many moles of O2 gas were produced?

After a few hours, the 720 mL flask cools to a temperature of 293K.

Pnew = atm

What is the new pressure due to the O2 gas?
Engineering
1 answer:
Mice21 [21]3 years ago
5 0

Answer:

0.07973 moles of O2 gas were produced

2.66 atm

Explanation:

Using the ideal gas equation

PV =nRT

P =pressure = 2.9 atm

V= volume = 720 mL =  720mL/1000= 0.72 L

n = number of moles = ?

R = the gas constant = 0.0821 atm L/(mol K)

T = temperature in Kelvin = 319 K

make n subject of the formula

n =PV/RT

n = 2.9 atm x 0.72 L / 0.0821 atm L/(mol K) x 319K = 0.07973 moles of O2 gas were produced

Pnew = atm?

P = nRT/V

 = 0.07973 x 0.0821 atm L/(mol K) x 293K/0.72 L = 2.66 atm

You might be interested in
james wants to qualify for icp are and licensure. Which degree would be required in order to qualify for a two year master of ar
ololo11 [35]

Answer:

A degree in architecture with 60 credit hours.

Explanation:

The requirements need for a student to qualify for a two year master of architecture degree are;

  • 60 credit hours in architecture
  • Complete 60 credit hours in related area of profession such as; planning, landscape architecture ,public health and others.
  • 45 credit hours in architecture course at the level of 500/600
4 0
3 years ago
Since the passing of the Utah GDL laws in 1999:
wlad13 [49]
The answer is b, I hope this helps you
7 0
3 years ago
Elements of parallel computing
Leya [2.2K]

\huge{\orange}\fcolorbox{purple}{cyan}{\bf{\underline{\green{\color{pink}Answer}}}}

<h3><u>E</u><u>lements of parallel </u><u>computing:</u></h3>

  • Computer systems organization.
  • Computing methodologies.
  • General and reference.
  • Networks.
  • Software and its engineering.
  • Theory of computation.

6 0
2 years ago
When measuring a Brake Drum, the Brake Micrometer is set to a Base Drum Diameter of 10 Inches plus four notches, and the dial re
kozerog [31]

Answer:

10.5

Explanation:

7 0
3 years ago
How to draw the output voltage waveform rectifier
tatyana61 [14]

Answer:

Half-wave rectifier converts an AC signal into a DC signal. It's called a half-wave because it only rectify the positive part of an AC signal.

AC Signal = An electrical signal that alternates between positive and negative voltage.

DC Signal = An electrical signal that only has positive voltage.

Rectify = A fancy word for converting something.

Adding a capacitor helps the positive part of the signal stay on longer. This work because the capacitor stores energy kinda like a battery. During the negative part of the AC signal, the energy stored in the capacitor will be drained and used, then the cycle repeats.

The load resistor is just there to prevent a short circuit from happening.

7 0
3 years ago
Other questions:
  • The first step to merging is entering the ramp and _____.
    10·1 answer
  • The mechanical properties of a metal may be improved by incorporating fine particles of its oxide. Given that the moduli of elas
    11·1 answer
  • The structure supports a distributed load of w. The limiting stress in rod (1) is 370 MPa, and the limiting stress in each pin i
    5·1 answer
  • Water flovs in a pipe of diameter 150 mm. The velocity of the water is measured at a certain spot which reflects the average flo
    13·1 answer
  • . Carly's Catering provides meals for parties and special events. In Chapter 2, you wrote an application that prompts the user f
    10·1 answer
  • The spring has a stiffness k = 200 N&gt;m and an unstretched length of 0.5 m. If it is attached to the 3-kg smooth collar and th
    12·1 answer
  • An engineer is designing a total hip implant. She intends to make the femoral stem out of titanium because it forms a good inter
    12·1 answer
  • A train which is traveling at 70 mi/hr applies its brakes as it reaches point A and slows down with a constant deceleration. Its
    12·1 answer
  • PLEASE HELPPPPPPP!!!!,
    10·2 answers
  • What’s the answer???
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!