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
slava [35]
3 years ago
9

What pressure is required to achieve a co2 concentration of 7.90×10−2 m at 20∘c?

Chemistry
1 answer:
Savatey [412]3 years ago
7 0

Answer:-  1.90 atm

Solution:- It is based on combined gas law equation, PV = nRT

In this equation, P is pressure, V is volume, n is moles of gas, R is universal gas constant and T is kelvin temperature.

If we divide both sides by V then:

P=\frac{nRT}{V}

We know that, molarity is moles per liter. So, in the above equation we could replace \frac{n}{V} by molarity, M of the gas. The equation becomes:

P = MRT

T = 20 + 273 = 293 K

M = 7.9*10^-^2

Let's plug in the values in the equation:

P = (7.9*10^-^2)(0.0821)(293)

P = 1.90 atm

So, the pressure of the gas is 1.90 atm.

You might be interested in
The balanced equation for the reaction between calcium and water to produce calcium hydroxide and hydrogen is
kolbaska11 [484]
Ca + 2H20--------> ca (oh)2 +H2
8 0
3 years ago
5.20763 to three significant figures​
Sergio039 [100]

Answer:

5.21

Explanation: You can only have 3 digits, so you would round to the hundredths place

5 0
2 years ago
What is the rate constant of a first-order reaction that takes 5.50 minutes for the reactant concentration to drop to half of it
bulgar [2K]
For a first order reaction, the half life is inversely proportional to the rate constant. 
The formula is
half life = ln(2)/k = 0.693/k
where k is the rate constant

t = 5.50 minutes

k = ln(2)/5.50 = 0.126 min^-1

Your rate constant is 0.126 min^-1.

8 0
3 years ago
Hydrogen, a potential future fuel, can be produced from carbon (from coal) and steam by the following reaction: C(s)+2H2O(g)→2H2
madam [21]

The question is incomplete , complete question is:

Hydrogen, a potential future fuel, can be produced from carbon (from coal) and steam by the following reaction:

C(s)+ 2 H_2O(g)\rightarrow 2H_2(g)+CO_2(g).\Delta H=?

Note that the average bond energy for the breaking of a bond in CO2 is 799 kJ/mol. Use average bond energies to calculate ΔH of reaction for this reaction.

Answer:

The ΔH of the reaction is -626 kJ/mol.

Explanation:

C(s)+ 2 H_2O(g)\rightarrow 2H_2(g)+CO_2(g).\Delta H=?

We are given with:

\Delta H_{H-O}=459 kJ/mol

\Delta H_{H-H}=432 kJ/mol

\Delta H_{C=O}=799 kJ/mol

ΔH =  (Energies required to break bonds on reactant side) - (Energies released on formation of bonds on product side)

\Delta H=(4\times \Delta H_{O-H})-(2\times \Delta H_{H-H}+2\times\Delta H_{C=O})

=(4\times 459 kJ/mol)-(2\times 432 kJ/mol+2\times 799 kJ/mol

\Delta H=-626 kJ/mol

The ΔH of the reaction is -626 kJ/mol.

5 0
3 years ago
The liter (L) is a measurement of which of the following quantities?
zhenek [66]
Is volume one of your answers?

5 0
3 years ago
Read 2 more answers
Other questions:
  • Calculate the density of an object that has a mass of 43 g and a volume of 56.0 ml.
    5·1 answer
  • Which process is occurring at the center of all active stars? A) fusion B) fission C) flatulation D) hydrogen decay
    9·1 answer
  • Which substance is an example of an element?
    10·2 answers
  • In a particle accelerator, the accelerated particle primarily gains what?
    5·1 answer
  • What is the symbol for the most common isotope of tin
    9·2 answers
  • Consider the following balanced equation:
    10·1 answer
  • Carbon burns in the presence of oxygen to give carbon dioxide. Which chemical equation describes this reaction?
    14·1 answer
  • I need help finding the formulas of these ionic compounds
    12·1 answer
  • Is water a mineral? what do you think
    10·1 answer
  • Why agar is used as a solidifying agent in culture media instead of gelatin
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!