Soil is a renewable resource if properly maintained. Which of the following helps to maintain healthy soil?

N each reaction box, place the best reagent or reactant from the list below. reagents may be used more than once or not at all.

Ne4ueva [31]

Answer:

See explaination

Explanation:

See attachment for the drawing of the intermediate products b and c (both are neutral; omit byproducts).

7 0

4 years ago

The most stable conformation of the following compound has

slega [8]

Answer:

The most stable conformation of the following compound has

A. An axial methyl group and an axial ethyl group.

B. An axial methyl group and an equatorial ethyl group.

C. An axial tert-butyl group.

D. An equatorial methyl group and an equatorial ethyl group.

E. An equatorial methyl group and an axial ethyl group.

Explanation:

The most stable conformation in the cyclohexane ring is the one in which both the substituents are in the equatorial position.

Among the given options,

option D An equatorial methyl group and an equatorial ethyl group.

When the substituents in the cyclohexane ring are in equatorial positions then, the steric repulsions will be reduced.

Answer is option D.

3 0

3 years ago

What are the reactants and products when butane combusts with excess oxygen?

larisa86 [58]

C3H8 + O2 --> CO2(g) + H2O(g) + energy(heat)

butane + oxygen --> carbon dioxide + water + heat

7 0

3 years ago

Please help!! Show the electronic configuration of magnesium atom.

Galina-37 [17]

Explanation:

Magnesium has atomic number 12. It will be distributed in K, L, M shell in the following way:

K shell can accommodate a maximum of 2 electrons.

L shell can accommodate a maximum of 8 electrons and

M shell will accommodate 2 electrons

So the configuration becomes 2, 8,3

3 0

3 years ago

Read 2 more answers

Hard water often contains dissolved Ca2 and Mg2 ions. One way to soften water is to add phosphates. The phosphate ion forms inso

Korvikt [17]

Answer: The mass of sodium phosphate that would be added is 22.14 grams

Explanation:

To calculate the number of moles for given molarity, we use the equation:

$\text{Molarity of the solution}=\frac{\text{Moles of solute}}{\text{Volume of solution (in L)}}$ .....(1)

For calcium chloride:

Molarity of calcium chloride solution = 0.050 M

Volume of solution = 1.5 L

Putting values in equation 1, we get:

$0.085M=\frac{\text{Moles of calcium chloride}}{1.5L}\\\\\text{Moles of calcium chloride}=(0.050mol/L\times 1.5L)=0.075mol$

1 mole of calcium chloride contains 1 mole of calcium ions and 2 moles of chloride ions

Moles of calcium ions = 0.075 moles

The chemical equation for the reaction of calcium ions and phosphate ions follows:

$3Ca^{2+}+2PO_4^{3-}\rightarrow Ca_3(PO_4)_2$

By Stoichiometry of the reaction:

3 moles of calcium ions reacts with 2 moles of phosphate ions

So, 0.075 moles of calcium ions will react with = $\frac{2}{3}\times 0.075=0.05mol$ of phosphate ions

For magnesium nitrate:

Molarity of magnesium nitrate solution = 0.085 M

Volume of solution = 1.5 L

Putting values in equation 1, we get:

$0.085M=\frac{\text{Moles of magnesium nitrate}}{1.5L}\\\\\text{Moles of magnesium nitrate}=(0.085mol/L\times 1.5L)=0.1275mol$

1 mole of magnesium nitrate contains 1 mole of magnesium ions and 2 moles of nitrate ions

Moles of magnesium ions = 0.1275 moles

The chemical equation for the reaction of magnesium ions and phosphate ions follows:

$3Mg^{2+}+2PO_4^{3-}\rightarrow Mg_3(PO_4)_2$

By Stoichiometry of the reaction:

3 moles of magnesium ions reacts with 2 moles of phosphate ions

So, 0.1275 moles of magnesium ions will react with = $\frac{2}{3}\times 0.1275=0.085mol$ of phosphate ions

1 mole of sodium phosphate contains 1 mole of phosphate ions and 2 moles of sodium ions

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

Molar mass of sodium phosphate = 164 g/mol

Total moles of phosphate ions = [0.05 + 0.085] = 0.135 moles

Putting values in above equation, we get:

$0.135mol=\frac{\text{Mass of sodium phosphate}}{164g/mol}\\\\\text{Mass of sodium phosphate}=(0.135mol\times 164g/mol)=22.14g$

Hence, the mass of sodium phosphate that would be added is 22.14 grams

5 0

4 years ago