All categories

3 years ago

Explain how the copper could be in the lake sample near the picnic area but not have been detected by this test.

Chemistry

1 answer:

Masja [62]3 years ago

8 0

Answer:

May be the instrument is incorrect or may be error in it.

Explanation:

The copper have not been detected by this test because the test may be not for the detection of copper, may be it is used for identification of another minerals. If there is copper in the lake sample but can't be detected in the test so it means that the instrument which is used for detection is not the right one or having error in that instrument. Every mineral has a specific type of instrument that detect its presence, if we use incorrect instrument for the mineral then we can't detect the presence of that specific mineral.

You might be interested in

When discussing solutions, the amount of solute dissolved in the solvent is important to know

valkas [14]

Answer: B

Explanation:

4 0

2 years ago

The block in this illustration is floating in water, which has a density of 1.00 g/cm3 .What is a good estimate of the density o

miss Akunina [59]

Answer : The density of the block is estimated to be, $0.30g/cm^3$ .

Explanation :

Density of the water, $\rho_w=1.0 g/cm^3$

As we know that,

Buoyant force = $\rho\times volume\times g$

where,

g = gravitational acceleration

volume of the block = v

density of the block = $\rho_o$

Weight of the Block = Buoyant force exerted by water

$\rho_o\times v\times g=\rho_w\times 30\%\text{ of volume of block}\times g$

$\rho_o\times v\times g=\rho_w\times 0.30v\times g$

$\rho_o\times v\times 9.8 m/s^2=1 g/cm^3\times 0.30v\times 9.8 m/s^2$

$\rho_o=0.30 g/cm^3$

Thus, the density of the block is estimated to be, $0.30g/cm^3$ .

6 0

3 years ago

Beer's Law states that A=ebc, where A is the absorbance, ε is the molar absorptivity of the solute, b is the path length, and c

Gelneren [198K]

Answer:

b. changing the compound changes the absorbance behavior.

Explanation:

Option a) would be akin to modifying the path length, b.

Option b) would involve using a different solute, as such, there would be another molar absortivity, ε.

Option c) would decrease the concentration (c) of the solute, which would explain why the absorbance would decrease as well.

8 0

3 years ago

Which of the following is not a concern regarding the use of corn as biofuel

Lady_Fox [76]

The color of corn is different than the color of gasoline or coal.

5 0

4 years ago

Read 2 more answers

Compare the energy requirements of a 50 year old woman and 50 year old man.

finlep [7]

Explanation:

For both men and women, the basics of a balanced diet are the same. Men have higher caloric requirements than women since they have a bigger body (both in height and weight) and more muscular mass.

So, Men needs more energy.

50 year old woman require less energy than 50 year old man.

3 0

3 years ago