Ans:
from the product / reactant solution
from the environment when no solution is involved
Endothermic reactions are those reactions that proceed with the absorption of heat energy. In this case, the enthalpy of the reactants i.e. the initial energy is lower than that of the products. Therefore, energy needs to be supplied in order to break the bonds in the reactants and allow the reaction to proceed. This energy can be absorbed either from the environment when no solution is involved or from the product reactant solution.
For example, electrolysis of water which produces H2 and O2 is an endothermic reaction. Here, energy is absorbed by water in the form of electricity (current) to split it into corresponding products.
This is most likely to be a purely ionic bond
The book<span> documented the detrimental effects on the environment—particularly on birds—of the indiscriminate use of pesticides. -A</span>
Answer:
2.09 atm
Explanation:
We can solve this problem by using the equation of state for an ideal gas, which relates the pressure, the volume and the temperature of an ideal gas:
where
p is the pressure of the gas
V is its volume
n is the number of moles
R is the gas constant
T is the absolute temperature
In this problem we have:
n = 0.65 mol is the number of moles of the gas
V = 8.0 L is the final volume of the gas
is the temperature of the gas
is the gas constant
Solving for p, we find the final pressure of the gas:
Answer:
An archeologist discovers an official-looking seal during an archeological dig. The seal is cylindrical in shape and is much like what a king would use when signing letters. Not long after, the archeologist finds a clay tablet covered in cuneiform script. The archeologist translates the words on the tablet. He discovers that it states a set of laws and rules that the citizens of the civilization must have had to follow.
Based on the passage, what conclusion can be drawn about the civilization?
Explanation:
An archeologist discovers an official-looking seal during an archeological dig. The seal is cylindrical in shape and is much like what a king would use when signing letters. Not long after, the archeologist finds a clay tablet covered in cuneiform script. The archeologist translates the words on the tablet. He discovers that it states a set of laws and rules that the citizens of the civilization must have had to follow.
Based on the passage, what conclusion can be drawn about the civilization?