Common additives to drinking water include elemental chlorine, chloride ions, and phosphate ions. Recently, reports of elevated

Solution:

The molecular formula is PbSO₄, indicating lead sulfate

Option c.

Explanation:

The percentage makeup shows that in 100 g of this compound, there are:

68.3 g of Pb, 10.6 g of S, and (100 - 68.3 - 10.6) = 21.1 g of O

To find the moles of each element, we divide by their molar masses:

68.3 g Pb / 207.2 g/mol = 0.329 moles Pb

10.6 g S / 32.06 g/mol = 0.331 moles S

21.1 g O / 16 g/mol = 1.32 moles O

Next, we find the mole ratio by dividing each by the smallest number of moles:

0.329 / 0.329 = 1 Pb

0.331 / 0.329 = 1 S

1.32 / 0.329 = 4 O

Thus, the molecular formula is PbSO₄, representing lead sulfate.

Answer:

45727g

Explanation:

The overall ionic reaction can be described as follows:

CrO42^- + 3 Fe2^+ + 8 H2O ------> Cr(OH)^3(s) + 3 Fe(OH)^3(s) + 4 H^+.

The amount of wastewater processed each day is specified as 60m^3/h, with the concentration of chromium in the wastewater recorded at 4.0 mg/L, and the allowable discharge concentration is set at 0.1 mg/L.

Step one: Convert m^3/h to L/h. Therefore, 60 m^3/h × 1000 dm^3 = 60000 L/h.

Step two: Calculate the amount of chromium consumed.

The amount of chromium utilized = { 60,000 × ( 4.0 - 0.1) } ÷ 1000 = 234 g.

Step three: Calculate the masses of Cr(OH)3 and Fe(OH)3.

The moles of chromium = 234/52 = 4.5 moles.

Molar mass of Cr(OH)3 = 103 g/mol and the molar mass of Fe(OH)3 = 106.8 g/mol.

Thus, the mass of Cr(OH)3 = 4.5 × 103 = 463.5 g.

And, the mass of Fe(OH)3 = 13.5 × 106.8 = 1441.8 g.

Consequently, the total equals 463.5 g + 1441.8 g = 1905.3 g.

Step four: Calculate the amount of particulate matter generated each day.

The total particulate matter produced daily = 24 × 1905.3 = 45727g.

Answer:- 0.134 seconds

Solution:- The speed is given as and the circumference is 24900 miles which is same as the distance light have to covered. It asks to calculate the time required to cover this distance by the light.

Unit conversion is needed from miles to meters since the speed is given in meters per second.

1 mile = 1609.34 meters

Thus,

= 40072566 meters

Now,

Rearranged for time, that gives:

Inserting the values:

= 0.134 seconds

Hence, light would take 0.134 seconds to traverse the indicated distance. The answer without the unit is 0.134.

Answer:

Oversight of weights and measures ensures correct evaluations of goods and services so that everyone receives a fair exchange in the marketplace. It also acts as a deterrent, promoting honesty among traders.

Explanation:

Answer:

Explanation:

Oxidation:

Oxidation refers to the process where electrons are lost, resulting in an increase in the oxidation state of an atom of an element.

Reduction:

Reduction is characterized by the acquisition of electrons, leading to a decrease in the oxidation number.

Oxidizing agents:

Oxidizing agents facilitate oxidation of other substances while they themselves undergo reduction.

Reducing agents:

Reducing agents cause the other element to be reduced, while they are oxidized in the process.

Examine the following reaction:

2AgCl + Zn  → 2Ag + ZnCl₂

In this instance, the oxidation state of Zn on the left is 0 and rises to +2 on the right, indicating it is oxidized, while the oxidation state of Ag drops from +1 on the left to 0 on the right, showing it is reduced.

4NH₃  +  3O₂   →   2N₂ +  6H₂O

For this reaction, nitrogen's oxidation state shifts from -3 on the left to 0 on the right, signifying it is oxidized, whereas oxygen decreases from 0 to -2, indicating it gets reduced.

Fe₂O₃ +  2Al  →   Al₂O₃ +  2Fe

Here, the oxidation state of iron reduces from +3 on the left to 0 on the right, meaning it is reduced, while aluminum shifts from 0 to +3, indicating it is oxidized.