(P1)(V1)=(P2)(V2)
(2.52 atm)(125 L)=(1.50 atm)(x L)
(315)/(1.50)=(V2)
V2=210 L
Answer:
Explanation:
Hello,
In this case, we find the following states:
a. Liquid salt water at 28.0 °C.
b. Liquid salt water at 102.5 °C.
c. Vapor salt water at 102.5 °C.
The first process (1) is to heat the liquid water from 28.0 °C to 102.5 °C and the second one (2) to vaporize the liquid salt water. In such a way, each process has an amount of energy that when added, yields the total energy for the process as shown below:
Best regards.
Answer:
H2SO4
Explanation:
Firstly,
2.056% hydrogen = 2.056g of H
32.69% Sulphur = 32.69g of S
65.26% oxygen = 65.26g of O
Next, we convert each mass into moles by dividing by their respective molar mass:
H = 1, S = 32, O = 16
H = 2.056/1 = 2.056mol
S = 32.69/32 = 1.021mol
O = 65.26/16 = 4.078mol
Next, we divide each mole value by the smallest mole value (1.021)
H = 2.056/1.021 = 2.01
S = 1.021/1.021 = 1
O = 4.078/1.021 = 3.99
Approximately the ratio of H to S to O is 2:1:4, hence, the empirical formula for H, S and O is H2SO4.
<h3>
Answer:</h3>
All the choices given are correct
- gas bubbles
- color change
- increase in temperature
- decrease in temperature
- release of light energy
<h3>
Explanation:</h3>
- Chemical reactions occurs when elements or compounds chemically join to form other compounds.
But, how do we know that indeed a chemical reaction has occurred?
- Chemical reactions involve changes of different parameters when they occur, thus various indications are used to show the occurrence of chemical reactions.
These indications include;
- Gas bubbles, also known as effervescence, for example when sodium metal is mixed with an acid, gas bubbles will be produced showing occurrence of a chemical reaction.
- Color change, which shows the formation of a new substance.
- Increase in temperature, which occurs in endothermic reactions where heat is absorbed from the surroundings.
- Decrease in temperature, which occurs in exothermic reaction where heat is lost to the surroundings.
- Other indicators include, formation of a precipitate, production of light, etc.