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3 years ago

How many electrons are needed to equal the mass of a proton?

1 answer:

5 0

<span>How many electrons are needed to equal the mass of a proton?
</span>
The correct answer is that you need 1836 electron to equal the mass of a proton. This means that a proton is equals to 1836 electron or 1 = 1836. This is the answer to your question. I hope this answer helped you.

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A gas occupies 3.8 L at -18° C and 975. torr. What volume would this gas occupy at STP?

Aleks04 [339]

To solve the question we will assume that the gas behaves like an ideal gas, that is to say, that there is no interaction between the molecules. Assuming ideal gas we can apply the following equation:

$PV=nRT$

Where,

P is the pressure of the gas

V is the volume of the gas

n is the number of moles

R is a constant

T is the temperature

Now, we have two states, an initial state, and a final state. The conditions for each state will be.

Initial state (1)

P1=975Torr=1.28atm

V1=3.8L

T1=-18°C=255.15K

Final state(2), STP conditions

P2=1atm

T2=273.15K

V2=?

We will assume that the number of moles remains constant, so the nR term of the first equation will be constant. For each state, we will have:

$\begin{gathered} \frac{P_1V_1}{T_1}=nR \\ \frac{P_2V_2}{T_2}=nR \end{gathered}$

Since nR is the same for both states, we can equate the equations and solve for V2:

$\begin{gathered} \frac{P_{2}V_{2}}{T_{2}}=\frac{P_1V_1}{T_1} \\ V_2=\frac{P_{1}V_{1}}{T_{1}}\times\frac{T_2}{P_2} \end{gathered}$

We replace the known values:

$V_2=\frac{1.28atm\times3.8L}{255.15K}\times\frac{273.15K}{1atm}=5.2L$

At STP conditions the gas would occupy 5.2L. First option

8 0

1 year ago

What is another name for the molecular orbital theory of bonding in metals? band theory ionic bond theory covalent bond theory e

mote1985 [20]

Band theory

The atomic orbitals of metals combine to form <em>molecular orbitals</em>. The molecular orbitals are so close in energy that they form a <em>band</em> of energies.

<em>Ionic bond theory</em> is incorrect because there are no ions in metals.

<em>Covalent bond theory</em> is incorrect because there are no covalent bonds in metals.

<em>Electron bond theory</em> is incorrect because there is no theory with that name (but there is a <em>valence bond theory</em>).

4 0

3 years ago

Read 2 more answers

Which of these properties contribute to homeostasis? Click on the correct

frez [133]

Body temperature is the main one. blood ph is very important. and reflex reactions. if this was right please give me brainliest

7 0

3 years ago

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Question 6

kompoz [17]

Considering the combined law equation, the new temperature is -244.56 °C or 28.44 K.

<h3>Boyle's law</h3>

Boyle's law states that the pressure of a gas in a closed container is inversely proportional to the volume of the container, when the temperature is constant: if the pressure increases, the volume decreases while if the pressure decreases, the volume increases.

Mathematically, this law states that the multiplication of pressure by volume is constant:

P×V=k

<h3>Charles's law</h3>

Charles's law states that the volume is directly proportional to the temperature of the gas: if the temperature increases, the volume of the gas increases while if the temperature of the gas decreases, the volume decreases.

Mathematically, Charles' law states that the ratio of volume to temperature is constant:

$\frac{V}{T} =k$

<h3>Gay-Lussac's law </h3>

Gay-Lussac's law states that the pressure of a gas is directly proportional to its temperature: increasing the temperature will increase the pressure, while decreasing the temperature will decrease the pressure.

Mathematically, Gay-Lussac's law states that the ratio of pressure to temperature is constant:

$\frac{P}{T} =k$