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
s344n2d4d5 [400]
2 years ago
14

A sample of carbon dioxide is contained in a 250.0 mL flask at 0.930 atm and 15.4 °C. How many molecules of gas are in

Chemistry
1 answer:
Yanka [14]2 years ago
8 0

Answer:

We are given:

Volume (V) = 0.25 L

Pressure (P) = 0.93 atm

Temperature (T) = 15.4°C  OR   288.4 K

<u>Solving for the number of moles of CO₂:</u>

From the ideal gas equation:

PV = nRT

replacing the variables

0.93 * 0.25 = n (0.082)(288.4)

n = 0.00983 moles

<u>Number of molecules:</u>

Number of moles=  0.00983

number of molecules in 1 mole = 6.022 * 10²³

Number of molecules in 0.00983 moles = 0.00983 * 6.022 * 10²³

Number of molecules = 5.91 * 10²¹

You might be interested in
Nitrogen is an element. What is the smallest particle of nitrogen that has all the properties of nitrogen?
oksian1 [2.3K]

Answer:

The structure of the atom.

Explanation:

The correct answer is - The structure of the atom.

Reason -

An atom is the smallest unit of matter that retains all of the chemical properties of an element.

6 0
2 years ago
Identify the reagents represented by the letters in the above reaction scheme. (enter your answer as a string of letters without
MAXImum [283]
Please show the whole question including the diagram so that you can receive help with the question.
7 0
3 years ago
*<br> What is the volume, in liters, of 12.0 kg of H2 at STP?
neonofarm [45]

Answer:

According to Avogadro's law, the volume of one mole of any gas at Standard Temperature and Pressure (STP = 273 K and 1 atm) is 22.4 L. Two important Gas Laws are required in order to convert the experimentally determined volume of hydrogen gas to that at STP. 1.

Explanation:

internet keep searching

6 0
3 years ago
For alpha decay to cause a loss in mass, such as that in the uranium 238 conversion to thorium 234, what must the atomic weight
Aleonysh [2.5K]

Explanation:

Reaction equation showing alpha decay in Uranium-238 is as follows.

    ^{238}_{92}U \rightarrow ^{234}_{90}Th + ^{4}_{2}He

It is known that an alpha particle is basically a helium nucleus and it contains 2 protons and 2 neutrons.  

Symbol of an alpha particle is ^{4}_{2}\alpha.

As atomic mass or weight is the sum of total number of protons and neutrons present in an atom.

Hence, the atomic weight of the alpha particle is (2 + 2) = 4.

6 0
2 years ago
Consider the following equilibrium: H2CO3+H2O = H3O+HCO3^-1. What is the correct equilibrium expression?
mylen [45]

Equilibrium expression is Keq = \frac{[H3O+][HCO3^-]}{[H2CO3]}\\

<u>Explanation:</u>

Equilibrium expression is denoted by Keq.

Keq is  the equilibrium constant that is defined as the ratio of concentration of products to the concentration of reactants each raised to the power its stoichiometric coefficients.

Example -

aA + bB = cC + dD

So, Keq = conc of product/ conc of reactant

Keq = \frac{[C]^c [D]^d}{[A]^a [B]^b}

So from the equation, H₂CO₃+H₂O = H₃O+HCO₃⁻¹

Keq = \frac{[H3O^+]^1 [HCO3^-]^1}{[H2CO3]^1 [H2O]^1}

The concentration of pure solid and liquid is considered as 1. Therefore, concentration of H2O is 1.

Thus,

Keq = \frac{[H3O+][HCO3^-]}{[H2CO3]}\\

Therefore, Equilibrium expression is Keq = \frac{[H3O+][HCO3^-]}{[H2CO3]}\\

4 0
2 years ago
Other questions:
  • How many grams of chromium (Cr) are present in 4.20 moles of the metal?
    8·1 answer
  • Explain the structure and function of DNA. What important roles does the phosphate-sugar backbone, nitrogen bases, complementary
    15·1 answer
  • Where and in what features is water found on Earth?
    5·1 answer
  • How do scientists measure the idea of time so long ago?
    11·1 answer
  • Part F
    7·1 answer
  • Give the IUPAC name for each compound.
    15·1 answer
  • Use the standard reduction potentials located in the Tables' linked above to calculate the equilibrium constant for the reaction
    10·1 answer
  • Somone PLZZZ BELP ME asappp
    12·1 answer
  • Drag the images into the correct category.<br><br><br> Contact Forces<br><br><br> Noncontact Forces
    8·1 answer
  • Red giant stars defination​
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!