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Y_Kistochka [10]
3 years ago
10

Match the terms to their definitions a reproductive cell

Chemistry
2 answers:
Svetradugi [14.3K]3 years ago
4 0
A cell that reproduces
konstantin123 [22]3 years ago
3 0

Answer:

a cell that reproduces

Explanation:

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A concentration cell consisting of two hydrogen electrodes (PH2 = 1 atm), where the cathode is a standard hydrogen electrode and
Lunna [17]

The pH of the unknown solution is 3.07.

<u>Explanation:</u>

<u>1.Find the cell potential as a function of pH</u>

From the Nernst Equation:

Ecell=E∘cell−RT /zF × lnQ

where

R denotes the Universal Gas Constant

T denotes the temperature

z denotes the moles of electrons transferred per mole of hydrogen

F denotes the Faraday constant

Q denotes the reaction quotient

Substitute the values,

E∘cell=0   lnQ=2.303logQ

E0cell=−2.30/RT /zF × log Q

Solving the equation,

<u>2. Find the Q  value</u>

Q=[H+]2prod pH₂, product/ [H+]2reactpH₂, reactant

Q=[H+]^2×1/1×1=[H+]2

Taking the log

logQ= log[H+]^2=2log[H+]=-2pH

From the formula,

Ecell=−2.303RT /zF× logQ

E cell= 2.303 × 8.314 CK mol (inverse)  × 298.15

K × 2pH /2×96 485  C⋅mol

( inverse)

E cell= 0.0592 V × pH

<u>3. Finding the pH value</u>

E cell= 0.0592 V × pH

pH = E cell/ 0.0592 V= 0.182V/ 0.0592V

pH=3.07

The pH of the unknown solution is 3.07.

7 0
3 years ago
Convection is _______________.
serious [3.7K]

Answer: d

Explanation:

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7 0
3 years ago
Read 2 more answers
A student uses a balance to determine the mass of an object as 5.719 grams. the correct mass of the object is 5.586 grams. what
zaharov [31]
The percentage error is given by multiplying relative error by 100%.
Therefore, to get the percentage error we need relative error which is given by dividing the absolute error with the actual value. 
Absolute error = 0.133
Percentage error = 0.133/5.586 × 100%
                            = 2.38%
The percentage error is therefore; 2.38%
8 0
3 years ago
How is electromagnetic energy transformed into heat energy
olga2289 [7]
Radiant Energy is electromagnetic energy that travels in transverse waves. Radiant energy includes visible light, x-rays, gamma rays and radio waves. Light is one type of radiant energy. Sunshine is radiant energy, which provides the fuel and warmth that make life on Earth possible. 

<span>Heat travels from the sun by a process called radiation. Radiation is the transfer of heat by electromagnetic waves. When infrared rays strike a material, the molecules in that material move faster. In addition to the sun, light bulbs, irons, and toasters radiate heat. When we feel heat around these items, however, we are feeling convection heat (warmed air molecules) rather than radiated heat since the heat waves strike and energize surrounding air molecules. </span>

<span>A light bulb changes the chemical energy of the bulb into electromagnetic radiation, or light. Which in return gets transformed into heat (have you ever touched a light bulb? ouch!). </span>

When you heat up coffee in a microwave, you are transforming electromagnetic energy into heat.http://www.svsu.edu/mathsci-center/uploa... 

<span>People have started to utilize electromagnetic energy in the form of solar power, using solar panels to gather the radiant energy that comes from the sun and use it for electricity. For example, a pool that has solar heating panels. </span>
8 0
3 years ago
At stp, a 12.0 liter sample of CH4 has the same total number of molecules as
Elden [556K]

Option 2: 12.0 L of CO_{2} (g) at STP.

The standard pressure and temperature values are 1 atm and 273.15 K.

Using the ideal gas equation, number of moles of gas can be calculated which is as follows:

PV=nRT...... (1)

Here, P is pressure, V is volume, n is number of moles, R is gas constant and T is temperature.

Also, in 1 mole of any gas there are 6.023\times 10^{23} molecules of the gas. This is known as Avogadro's number and denoted by symbol N_{A}

Thus,

N=n\times N_{A}

Equation (1) can be rewritten as follows:

PV=\frac{N}{N_{A}}RT

On rearranging,

N=\frac{P\times V\times N_{A}}{R\times T}

Here, all the other terms are constant except volume, thus, gas with volume equal to the volume of CH_{4} will have same number of molecules.

Volume of CH_{4} gas and CO_{2}gas is same thus, CH_{4} will have same total number of molecules as  CO_{2} gas.


5 0
3 years ago
Read 2 more answers
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