Which of these statements is true?

Chemistry

2 answers:

frozen [14]3 years ago

6 0

I think that it is B. because the others are most likely not true.

shepuryov [24]3 years ago

3 0

The answer would be B because you know that it is the most consistently true statement.

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A 2.04 g lead weight, initially at 10.8 oC, is submerged in 7.74 g of water at 52.2 oC in an insulated container. clead = 0.128

QveST [7]

Answer:

Explanation:

Hello, in this case, the lead is catching heat and the water losing it, that's why the heat relation ship is (D is for Δ):

$DH_{lead}=-DH_{water}$

Now, by stating the heat capacity definition:

$m_{Pb}C_{Pb}*(T_{eq}-T_{lead}=-m_{H_2O}C_{H_2O}*(T_{eq}-T_{H_2O})\\$

Solving for the equilibrium temperature:

$T_{eq}=\frac{m_{Pb}C_{Pb}T_{Pb}+m_{H_2O}C_{H_2O}T_{H_2O}}{m_{Pb}C_{Pb}+m_{H_2O}C_{H_2O}} \\\\T_{eq}=\frac{2.04g*0.128J/(g^oC)*10.8^oC+7.74g*4.18J/(g^oC)*52.2^oC}{2.04g*0.128J/(g^oC)+7.74g*4.18J/(g^oC)} \\\\T_{eq}=51.87^oC$

Which is very close to the water's temperature since the lead's both mass and head capacity are lower than those for water.

Best regards.

5 0

2 years ago

Examine this reaction:

Alina [70]

Answer:

The normal amount of disaccharide would be produced, but fewer monosaccharides would be produced.

Explanation:

The first reaction, the conversion of starch into disaccharides, is catalyzed by the enzyme amylase. Since amylase is present in a normal amount, a normal amount of disaccharides will be produced.

In the second reaction, these disaccharides will be transformed into monosaccharides by a disaccharidase. However, since there is less disaccharidase, there will be fewer monosaccharides produced than if it was a normal amount of amylase.

8 0

3 years ago

Formula of sodium bicarbonate

lutik1710 [3]

NaHCO3 is the answer for the query

3 0

2 years ago

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A sealed 1.0 L flask is charged with 0.500 mol of I2 and 0.500 mol of Br2. An equilibrium reaction ensues: I2 (g) + Br2 (g) ↔ 2I

Daniel [21]

Answer: Thus the value of $K_{eq}$ is 110.25