Answer:
A) <u><em>Dinitrogen Oxide:</em></u>
=> 
(Also called Nitrous Oxide)
B) <u><em>Calcium Dihydrogen Phosphate:</em></u>
=> 
(Also called Monocalcium phosphate)
Answer:
The answer to your question is U-234
Explanation:
Data
Thorium-234
beta emission twice
Definition
Beta emission is when a beta particle (electron) is emitted from an atomic nucleus.
First beta emission
²³⁴₉₀Th ⇒ ²³⁴₉₁Pa + e⁻
Second beta emission
²³⁴₉₁ Pa ⇒ ²³⁴₉₂U + e⁻
The atom will be Uranium-324
Answer: The specific heat capacity of chromium is 
Explanation:
As we know that,
![m_1\times c_1\times (T_{final}-T_1)=-[m_2\times c_2\times (T_{final}-T_2)]](https://tex.z-dn.net/?f=m_1%5Ctimes%20c_1%5Ctimes%20%28T_%7Bfinal%7D-T_1%29%3D-%5Bm_2%5Ctimes%20c_2%5Ctimes%20%28T_%7Bfinal%7D-T_2%29%5D)
.................(1)
where,
q = heat absorbed or released
= mass of chromium = 15.5 g
= mass of water = 55.5 g
= final temperature =
= temperature of chromium = 
= temperature of water = 
= specific heat of chromium= ?
= specific heat of water= 
Now put all the given values in equation (1), we get
![-15.5\times c_1\times (19.5-18.9)=[55.5\times 4.184\times (19.5-100)]](https://tex.z-dn.net/?f=-15.5%5Ctimes%20c_1%5Ctimes%20%2819.5-18.9%29%3D%5B55.5%5Ctimes%204.184%5Ctimes%20%2819.5-100%29%5D)
The specific heat capacity of chromium is
Answer: Option (A) is the correct answer.
Explanation:
A catalyst is a substance which helps in increasing the rate of a reaction without itself getting consumed in the reaction.
A catalyst lowers the activation energy of a reaction so that reactant molecules with less energy can easily participate into the chemical reaction and thus, product formation becomes faster.
Thus, we can conclude that adding a catalyst to the reaction would reduce the activation energy of a chemical reaction.
The SI unit of volume is the cubic meter.
