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navik [9.2K]
2 years ago
10

A 500 mL piston has a gas mixture inside at a pressure of 15.0 atm. What volume would the piston have if the pressure increased

to 30.0 atm?
Chemistry
1 answer:
spayn [35]2 years ago
6 0

Answer:

The volume of the piston would be 250 mL.

Explanation:

Volume of the piston, V_1=500\ mL

Pressure, P_1=15\ atm

Let V_2 is the volume of piston if the pressure increased to 30.0 atm.

It is based on Boyle's law. It is given by:

\dfrac{V_1}{V_2}=\dfrac{P_2}{P_1}\\\\V_2=\dfrac{V_1P_1}{P_2}\\\\V_2=\dfrac{500\times 15}{30}\\\\V_2=250\ mL

So, the volume of the piston would be 250 mL.

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Answer:

Explanation:

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3 years ago
A student was titrating the calcium and water solution and notice the formation of bubbles in the flask. which description would
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When titrating Calcium and Water solution, if there is some CaCO3 in the solution, the following reactions may occur in acid solution:

CaCO₃ + H⁺ → Ca⁺² + HCO₃⁻

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3 years ago
The radioactive isotope of lead, Pb-209, decays at a rate proportional to the amount present at time t and has a half-life of 3.
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Answer:

Therefore it will take 7.66 hours for 80% of the lead decay.

Explanation:

The differential equation for decay is

\frac{dA}{dt}= kA

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\Rightarrow A=Ce^{kt}         [e^{c_1}=C]

The initial condition is A(0)= A₀,

\therefore A_0=Ce^{0.k}

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Now putting the value of k,A and A₀in the equation (1)

\therefore 0.2=1e^{(-0.21)\times t}

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Electronegativity is the strength an atom has to attract a bonding pair of electrons to itself. When a chlorine atom covalently bonds to another chlorine atom, the shared electron pair is shared equally. The electron density that comprises the covalent bond is located halfway between the two atoms.

But what happens when the two atoms involved in a bond aren’t the same? The two positively charged nuclei have different attractive forces; they “pull” on the electron pair to different degrees. The end result is that the electron pair is shifted toward one atom.

ATTRACTING ELECTRONS: ELECTRONEGATIVITIES

The larger the value of the electronegativity, the greater the atom’s strength to attract a bonding pair of electrons. The following figure shows the electronegativity values of the various elements below each element symbol on the periodic table. With a few exceptions, the electronegativities increase, from left to right, in a period, and decrease, from top to bottom, in a family.

Electronegativities give information about what will happen to the bonding pair of electrons when two atoms bond. A bond in which the electron pair is equally shared is called a nonpolar covalent bond. You have a nonpolar covalent bond anytime the two atoms involved in the bond are the same or anytime the difference in the electronegativities of the atoms involved in the bond is very small.



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