Answer
Dmitri Mendeleev Explanation:The modern periodic tables is credited primarily to the russian chemist Dmitri Mendeleev. Mendeleev's table is based on the periodic law, which states that when elements are arranged in order of increasing mass, their properties recur periodically.
Answer:
<u>The Standard enthalpy of reaction:</u>
Explanation:
Given- Standard Heat of Formation:
= -3110 kJ/mol,
= -286 kJ/mol,
= -1279 kJ/mol
<u><em>Given chemical reaction:</em></u> P₄O₁₀(s) + 6H₂O → 4H₃PO₄
<em>The standard enthalpy of reaction:</em> = ?
<u><em>To calculate the Standard enthalpy of reaction</em></u> (), <u><em>we use the equation:</em></u>
<u>Therefore, the Standard enthalpy of reaction:</u>
[H3O+][OH-] = 4.5 x 10^-15
[H3O+] = [OH-] = 6.7 x 10^-8 M
Explanation: do the math
Answer:
₅₅Cs¹³⁷ → ₅₆Ba¹³⁷ + ⁰₋₁e
Explanation:
Beta radiations:
Beta radiations are result from the beta decay in which electron is ejected. The neutron inside of the nucleus converted into the proton an thus emit the electron which is called β particle.
Properties of beta radiations:
The mass of beta particle is smaller than the alpha particles.
They can travel in air in few meter distance.
These radiations can penetrate into the human skin.
The sheet of aluminium is used to block the beta radiation
₅₅Cs¹³⁷ → ₅₆Ba¹³⁷ + ⁰₋₁e
The beta radiations are emitted in this reaction. The one electron is ejected and neutron is converted into proton.
The distance traveled by light : 1.86 x 10⁵ miles
Explanation:
Given
speed of light=v=1.86 x 10⁵ miles/s
time=1 s
Required
distance of light travel
Solution
The motion of light can be considered as motion that has a constant velocity so that it can be classified as a straight, regular motion that has no acceleration
Can be formulated
For the distance traveled by light in the above problem becomes: