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
Oxana [17]
3 years ago
13

Use a graph to solve the equation on the interval

Chemistry
1 answer:
Fofino [41]3 years ago
8 0
In order to solve this graphically, you would construct two lines:
The first of y = √2
The second of y = sec(x)

The solutions will be the intersections over the given domain.
Solving mathematically:
sec x = √2
1/cos(x) = √2
cos (x) = 1/√2

x = -π/4 and π/4
You might be interested in
Como se neutraliza el ph
Mkey [24]
Solo Ve A Incognito O En Tab Privado
5 0
4 years ago
In a 200 cm3 container, a certain amount of O2 gas is held with a piston at equilibrium with the external pressure being 1 bar.
Maslowich

Answer:

a) V2 = 200.161 cm³

b)  Wexp = 0.0161 J done by the system

c) ΔU = 1.984 J

d) ΔH = 2.006 J

Explanation:

ΔU = Q + W.....first law

a) at constant temperature (298 K ):

∴ ΔU = 0 ⇒ Q = - W

∴ W = - ∫ P dV

⇒ Q = ∫ PdV

∴ PV = nRT

⇒ P = nRT / V

⇒  Q = ∫ nRT dV/V

⇒ Q = nRT Ln ( V2 / V1 )....assuming n O2 = 1 mol

⇒  Q / nRT = Ln ( V2 / V1 )

⇒ 2 J / (( 1mol) ( 8.314 J/molK * 298 K )) = Ln ( V2 / V1 )

⇒ 8.072 E-4 = Ln ( V2 / V1 )

⇒ 1.001 = V2 / V1

⇒ V2 = 1.001 * 200 cm³

⇒ V2 = 200.161 cm³  ( 2.00161 E-4 m³)

b) Wexp = - ∫ PdV.......work done by the system ( - )

P = 1 bar = 10197.2 Kgf/m²

⇒ W exp = - 10197.2 Kgf/m² * ( 2.00161 E-4 - 2.00 E-4 )m³

⇒ W exp = - 1.642 E-3 Kgf *m ( - 0.0161 J )

c) ΔU = Q + W

⇒ ΔU = 2 J - 0,0161 J

⇒ ΔU = 1.984 J   ( 0.202 Kgf*m )

d) H = U + PV.....ideal gas

⇒ ΔH = Δ ( U + PV )

⇒ ΔH = ΔU + P2V2 - P1V1

⇒ ΔH = 0.202  + (( 10197.2 * 2.00161 e-4 )) - (( 10197.2 * 2.00 E-4 ))

⇒ ΔH = 0.202 + 2.041 - 2.0394

⇒ ΔH = 0,204 Kgf*m ( 2.006 J )

8 0
4 years ago
Which of the following gases will have the slowest rate of effusion?
Neko [114]

hydrogen gas...........

6 0
3 years ago
Calculate the weight of a 1 kg object on Earth which has a gravitational acceleration of 9.8 m/s2?
fredd [130]
  • Mass (m) = 1 Kg
  • Acceleration due to gravity (g) = 9.8 m/s^2
  • We know, weight = mass × acceleration due to gravity.
  • Therefore, weight of the object

= 1kg \:  \:  \times 9.8 {ms}^{ - 2}  \\  = 9.8 \:  \: N

<h3>Answer:</h3>

B. 9.8 N

Hope you could get an idea from here.

Doubt clarification - use comment section.

4 0
2 years ago
A teacher asks students to design an activity to study the formation of inherited traits. Which activity should the students des
MissTica

Answer:

The students should create a project in which they each look at a unique trait that each have (for example, detached ear lobes) and look at their parents to see if they too have this trait. To take it a step further, look at their grandparents for this trait, and ask them about their parents and if they have this trait, this could tell them whether the trait has always, been apparent within the family, if it skipped a generation, or the genetics of one parents were more dominant then the other.

8 0
3 years ago
Other questions:
  • Vanillin is the compound containing carbon, hydrogen, and oxygen that gives vanilla beans their distinctive flavor. The combusti
    14·1 answer
  • What is a device invented in 1889 that plays circular, flat records?
    14·1 answer
  • many stereo speaker cables are made of copper wire surrounded by robert electricity travel down the copper portion of the cable
    7·2 answers
  • Which of the following is a change from a more condensed to a less condensed state of matter?
    6·2 answers
  • A concentration cell consists of two sn/sn2+ half-cells. the electrolyte in compartment a is 0.24 m sn(no3)2. the electrolyte in
    6·1 answer
  • Question and answernoptions on the picture zoom in u have to read it help :( ​
    8·1 answer
  • Draw the structures of organic compounds A and B. Indicate stereochemistry where applicable The starting material is ethyne, a c
    11·1 answer
  • A sample of propane, C3H8, contains 17.0 moles of carbon atoms. How many total moles of atoms does the sample contain
    14·1 answer
  • 0.2640 g of sodium oxalate is dissolved in a flask and requires 30.74 mL of potassium
    15·1 answer
  • What are good life notes about science
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!