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
Kaylis [27]
3 years ago
11

A gas container has an initial temperature of 348 K with an unknown pressure. When the temperature changes to 506 K the pressure

is found to be 1.55 atm. What was the initial pressure in atm?
Chemistry
1 answer:
Scorpion4ik [409]3 years ago
7 0

Answer:

1.06 atm

Explanation:

We are given the following variables to work with:

Initial pressure (P1): unknown

Initial temperature (T1): 348 K

Final temperature (T2): 506 K

Final pressure (P2): 1.55 atm

We are asked to find the initial pressure (P1). We want to choose a gas law equation that relates initial pressure and temperature to final pressure and temperature. Gay-Lussac's law does this:

\frac{P_{1}}{T_1} =\frac{P_{2}}{T_2} \\

We can rearrange the law algebraically to solve for P_{1}.

{P_{1}} =\frac{(T_1)(P_{2} )}{T_2} \\

Substitute your known variables and solve:

{P_{1}} =\frac{(348 K)(1.55 atm )}{506 K} \\ = 1.06 atm

You might be interested in
Hey please answer this thanks.
Aleks04 [339]

Explanation:

Percentage composition of oxygen = (80/134) * 100% = 59.7%.

6 0
3 years ago
You’ve been waiting for the bus and your hands become cold. When you get onto the bus and sit down, you put your hands under you
snow_tiger [21]

Explanation:

The <u>First Law of Thermodynamics</u> states that energy cannot be created or destroyed in an isolated system. In other words, energy can be converted from one form into another, but it cannot be created nor destroyed.

<u>Conduction</u> is the transfer of energy from one molecule to another by direct contact. This transfer occurs when molecules hit against each other, which can take place in solids, liquids, and gases.

When you put your cold hands under your legs to warm your hands up, the heat energy from your legs is being transferred to your hands through conduction. However, since energy cannot be created, there is no extra heat energy that can instantaneously replace the heat created by your legs.

3 0
3 years ago
Read 2 more answers
Complete the reaction, which is part of the electron transport chain. The abbreviation Q represents coenzyme Q. Use the appropri
fredd [130]

Answer:

x = 2+

Explanation:

1) FADH2 + Q => FAD + QH2

Since H is added to Q

=> Reactant reduced is Q

(2) Balancing charges on both sides of the equation gives:

QH2 + 2 cyt c(Fe3+) => Q + 2 cyt c(Fe2+) + 2 H+

Thus x = 2+

7 0
3 years ago
What is the pH and pOH of a 2.2 x 10^-3 HBr solution?
antiseptic1488 [7]

Answer:

The pH and pOH of a 2.2*10⁻³ HBr solution is 2.66 and 11.34  respectively.

Explanation:

pH - short for hydrogen potential - is a measure of the acidity or alkalinity of a solution. So the pH is a parameter that indicates the concentration of hydrogen ions [H]⁺ that exist in a solution.

The pH is expressed as the negative base 10 logarithm of the hydrogen ion concentration. This is represented by:

pH= - log [H⁺]

pH is measured on a scale of 0 to 14. On this scale, a pH value of 7 is neutral, which means that the substance or solution is neither acidic nor alkaline. A pH value of less than 7 means that it is more acidic, and a pH value of more than 7 means that it is more alkaline.

HBr is a strong acid. Then, in aqueous solution it will be  totally dissociated. So the proton concentration is equal to the initial concentration of  acid:

[H⁺]= [HBr]= 2.2*10⁻³ M

So:

pH= - log (2.2*10⁻³)

pH= 2.66

On the other hand, pOH is a measure of the concentration of hydroxyl ions in a solution. The sum of pH and pOH equals 14:

pH + pOH= 14

2.66 + pOH= 14

pOH= 14 - 2.66

pOH= 11.34

<u><em>The pH and pOH of a 2.2*10⁻³ HBr solution is 2.66 and 11.34  respectively.</em></u>

4 0
3 years ago
6. 7. A hyperbaric chamber has a volume of 200. L. (a) How many moles of oxygen are needed to fill the chamber at room temperatu
Otrada [13]

Answer:

a) 24.7 mol

b) 790 g

Explanation:

Step 1: Given data

  • Volume of the chamber (V): 200. L
  • Room temperature (T): 23 °C
  • Pressure of the gas (P): 3.00 atm

Step 2: Convert "T" to Kelvin

We will use the following expression.

K = °C + 273.15

K = 23°C + 273.15 = 296 K

Step 3: Calculate the moles (n) of oxygen

We will use the ideal gas equation.

P × V = n × R × T

n = P × V/R × T

n = 3.00 atm × 200. L/(0.0821 atm.L/mol.K) × 296 K = 24.7 mol

Step 4: Calculate the mass (m) corresponding to 24.7 moles of oxygen

The molar mass (M) of oxygen ga sis 32.00 g/mol. We will calculate the mass of oxygen using the following expression.

m = n × M

m = 24.7 mol × 32.00 g/mol = 790 g

6 0
3 years ago
Other questions:
  • Thermal expansion or thermal contraction would be most noticeable in which of the following
    7·1 answer
  • How many moles are in 1.84x10^24 formula units of CaCl2, calcium chloride?
    9·1 answer
  • A car is held motionless off the ground by a hovering helicopter. If the car's mass is 1500kg, what is the force on the car due
    6·2 answers
  • A spaceship moving with an initial velocity of 58.0 meters/second experiences a uniform acceleration and attains a final velocit
    7·1 answer
  • Becker did an experiment. Separately, Tracy did the exact same experiment. Becker and Tracy found they each got very different r
    7·2 answers
  • The temperature of a container of oxygen gas is increased from 149 k to 298 k which of the following statement is true
    14·1 answer
  • Nitrogen and carbon can form ___ bonds in which six electrons ( three pairs ) are shared.
    9·1 answer
  • Calculate the density of carbon dioxide at STP
    15·1 answer
  • 2. Which statement about bonding is correct? (1 point)
    10·2 answers
  • For a constant force, when the surface area is tripled the
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!