CARBON
It loves to donate electrons, and combines easily with most things, and is essential to many things.
269,937 hope this helps!!
Answer:
0.012mol
Explanation:
1.
Given parameters:
Pressure in the balloon = 1.25atm
Volume of the balloon = 2.5L
Unknown:
Number of moles = ?
Solution:
We are going to used the combined gas law to solve this problem.
PV = nRT
P is the pressure
V is the volume
n is the number of moles
R is the gas constant = 0.082atmdm³mol⁻¹K⁻¹
Insert the parameters and solve;
1.25 x 2.5 = n x 0.082 x 285
n = 0.13mol
The number of moles is 0.13mol
2.
Given parameters:
Pressure = 16torr;
to atm is ;
760torr = 1atm
16torr = = 0.02atm
Volume = 12L
Temperature = 253K
Using the ideal gas law;
PV = nRT
0.02x12 = n x 0.082 x 253
n = 0.012mol
Explanation:
When Henri Becquerel investigated the newly discovered X-rays in 1896, it led to studies of how uranium salts are affected by light. By accident, he discovered that uranium salts spontaneously emit a penetrating radiation that can be registered on a photographic plate.
Answer:
The limiting reagent is the reactant that is completely used up in a reaction, and thus determines when the reaction stops. ... The limiting reagent is the one that is totally consumed; it limits the reaction from continuing because there is none left to react with the in-excess reactant.
Explanation:
The limiting reagent is the reactant that is completely used up in a reaction, and thus determines when the reaction stops. ... The limiting reagent is the one that is totally consumed; it limits the reaction from continuing because there is none left to react with the in-excess reactant.