why PbS is less soluble in water​

Answer:

8 moles of C

Explanation:

From the question given above, the following equation was obtained:

3A + 2B —> 6C

From the equation above,

3 moles of A reacted to produce 6 moles of C.

Thus, the number of mole of C produced by reacting 4 moles of A can be obtained as follow:

From the equation above,

3 moles of A reacted to produce 6 moles of C.

Therefore, 4 moles of C will react to produce = (4 × 6)/3 = 8 moles of C

Thus, 8 moles of C can be obtained from the reaction of 4 moles of A with excess B

Answer:

A) 0.1225 M

B) 100.4 g/mol

Explanation:

Step 1: Write the generic neutralization reaction

HA(aq) + NaOH(aq) ⇒ NaA(aq) + H₂O(l)

Step 2: Calculate the reacting moles of NaOH

17.73 mL of 0.1036 M NaOH react. The reacting moles are:

0.01773 L × 0.1036 mol/L = 1.837 × 10⁻³ mol

Step 3: Calculate the reacting moles of HA

The molar ratio of HA to NaOH is 1:1. The reacting moles of HA are 1/1 × 1.837 × 10⁻³ mol = 1.837 × 10⁻³ mol.

Step 4: Calculate the molar concentration of HA

1.837 × 10⁻³ moles of HA are in a 15.00 mL volume. The molar concentration is:

M = 1.837 × 10⁻³ mol / 0.01500 L = 0.1225 M

Step 5: Calculate the molar mass of HA

1.837 × 10⁻³ moles of HA weigh 0.1845 g. The molar mass of HA is:

0.1845 g / 1.837 × 10⁻³ mol = 100.4 g/mol

Answer:

Tetrahedral shape

Explanation:

The compound SiCl₄ has a molecular geometry of a tetrahedral shape. The shape of compound can be predicted using the valence shell electron pair repulsion theory model.

Answer:

may die depending on how completely it was girdled.

Explanation:

Answer:

The immune system is made of lungs, liver, intestine, bone marrow, tonsils, adenoids.Spleen, appendix, lymph nodes, and nodes.

Explanation:

Answer: Li^+ (g) ----> Li^2+ (g) + e^-

Considering the definition of first and second ionization energy, the second ionization energy of lithium is:

Li⁺ →  Li²⁺  +  1 e-

In first place, the electrons are attracted to the nucleus and it is necessary to provide energy to start them. Ionization energy is the energy required to remove an electron from a gaseous atom, isolated and in a ground state. The electrons in the last shell, which are the weakest attracted to the nucleus, are always lost. In this way the neutral atom becomes a gaseous cation (ion with a positive charge).

So, in this case, the first ionization energy of lithium is:

Li →  Li⁺  +  1 e-

The energy required to remove a second electron is called the second ionization energy and due to the difficulty of removing an electron from a positive particle, its value is greater than the first ionization energy (the volume of a positive ion is less than that of the neutral atom and the electrostatic force is greater in the positive ion than in the atom)

Finally, in this case, the second ionization energy of lithium is:

Li⁺ →  Li²⁺  +  1 e-

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Answer:

0.12 mole.

Explanation:

From the question given above, the following data were obtained:

Molarity of NaCl solution = 0.1 M

Volume of NaCl solution = 1.2 L

Mole of NaCl =.?

Molarity of a solution is simply defined as the mole of solute per unit litre of the solution. Mathematically, it is expressed as:

Molarity = mole /Volume

Thus, we can obtain the mole of NaCl in the solution by using the above formula as follow:

Molarity of NaCl solution = 0.1 M

Volume of NaCl solution = 1.2 L

Mole of NaCl =.?

Molarity = mole /Volume

0.1 = mole of NaCl /1.2

Cross multiply

Mole of NaCl = 0.1 × 1.2

Mole of NaCl = 0.12 mole

Therefore, 0.12 mole of NaCl is present in the solution.

Answer:

Depth of field, often called the plane of sharpness, is the area in a photograph where objects are in sharp focus. Crime scene and evidence photographs should have as much in focus as possible (a deep plane of sharpness). This is because out of focus areas of a photograph can become issues in court.

Explanation:

Hope this helps!

Answer: fun fact an apple onion and potatoe all taste the same if you plug your nose

Explanation:

Answer:

heat energy

Explanation:

Conduction is the transfer of heat energy from one substance to another or within a substance.

Answer:

130 moles of water might be produced by the reaction.

Explanation:

We state the equation for production of water:

2H₂(g) + O₂ (g) → 2H₂O (l)

Moles of hydrogen: 130

Moles of oxygen: 60

We state that the limting reactant is the oxygen

For 2 moles of hydrogen, we need 1 mol of oxygen

For 130 moles of hydrogen, we would need 65 moles, and we only have 60. Ratio is 2:1

1 mol of O₂ can produce 2 moles of water

Then, 60 moles of O₂ will produce (60 . 2) /1 = 130 moles

Answer:

1.4 g

Explanation:

Step 1: Write the balanced combustion reaction

CaC₂O₄ + 1/2 O₂ ⇒ CaO + 2 CO₂

Step 2: Calculate the moles corresponding to 3.2 g of CaC₂O₄

The molar mass of CaC₂O₄ is 128.10 g/mol.

3.2 g × 1 mol/128.10 g = 0.025 mol

Step 3: Calculate the moles of CaO formed from 0.025 moles of CaC₂O₄

The molar ratio of CaC₂O₄ to CaO is 1:1. The moles of CaO formed are 1/1 × 0.025 mol = 0.025 mol.

Step 4: Calculate the mass corresponding to 0.025 moles of CaO

The molar mass of CaO is 56.07 g/mol.

0.025 mol × 56.07 g/mol = 1.4 g

Answer:

Pause the video to take as much time as needed. Pause it to create more wait-time to answer questions before I move on. One of the best ways to learn is to quiz yourself as you go along.

Explanation:

The ionic compound and covalent compound can be easily determined by electronegativity difference.

If the compound will be formed by transferring the electrons then such kind of compound or molecule will be considered as ionic compound.

If the compound will be formed by sharing the electrons then such kind of compound or molecule will be considered as covalent compound.

It is easy to know the nature of compound like ionic or covalent . If the electronegativity difference of given molecule lies between 0 to 2.1 then molecule will be covalent compound. If electronegativity difference will be greater than 2.1 then compound will be ionic compound.

To know more about ionic compound and covalent compound.

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Answer:

[tex]m_{LiNO_3}=314gLiNO_3[/tex]

Explanation:

Hello!

In this case, for the given chemical reaction:

[tex]Pb(SO_4 )_2, + 4 LiNO_3 \rightarrow Pb(NO_3)_4, + 2 Li_2 SO_4[/tex]

We can see a 4:2 mole ratio between lithium nitrate (68.946 g/mol) and lithium sulfate (109.94 g/mol); in such a way, via stoichiometry, the required mass of lithium nitrate to make 250 g of lithium sulfate turns out:

[tex]m_{LiNO_3}=250gLi_2SO_4*\frac{1molLi_2SO_4}{109.94gLi_2SO_4} *\frac{4molLiNO_3}{2molLi_2SO_4} *\frac{68.946gLiNO_3}{1molLiNO_3}\\\\m_{LiNO_3}=314gLiNO_3[/tex]

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Answer:

110

Explanation:

Answer:

d.) intensity

Explanation:

Answer:

(d ) . A bill of materials.

Explanation:

I hope help you !!!!!!!

Answer:

Because a good is always priced higher than its marginal cost, a monopolistically competitive market can never achieve productive or allocative efficiency. ... Because monopolistic firms set prices higher than marginal costs, consumer surplus is significantly less than it would be in a perfectly competitive market.

Explanation:

I think

A monopolistically competitive market can never achieve productive or allocative efficiency since a good is always priced higher than its marginal cost. In monopolistically competitive businesses, suppliers will underproduce.

Efficiency is the ability to achieve something or get a desired outcome without wasting resources, time, money, energy, or effort. In a broader sense, it is the capacity to carry out tasks effectively, efficiently, and without wasting time.

Due to the fact that it does not produce at the minimum of its average cost curve or where P = MC, a monopolistically competitive firm is inefficient. As a result, a firm that is monopolistically competitive would typically produce less at a greater cost and charge a higher price than a firm that is perfectly competitive.

Thus,  In monopolistically competitive businesses, suppliers will underproduce.

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Answer:

The mole ratio is --> 1: 2

5 moles of N2

Explanation:

The balanced equation shows us that for every mole of N2, 2 moles of NH3 will be produced.

This also means that in order for 10 moles of NH3 to be produced, 5 moles of N2 need to react

Answer:

The answer is given to you by as04621.

Explanation:

Answer:

Which group in the Periodic Table contains elements that form ions which are larger than their atoms?

The second.. . Luckily for you, I just happen to have a chart in my room.

The periodic table that contains elements that form ions which are larger than their atoms is group 2 .

Elements in group 2 of the periodic table known as alkali earth metal usually form ions that are larger than their atoms.

The elements in this group include the following;

Thus, we can conclude that the group in the periodic table that contains elements that form ions which are larger than their atoms is group 2 .

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Answer:

Approximately [tex]3.81\; \rm m[/tex].

Explanation:

Look up the density [tex]\rho[/tex] of carbon tetrachloride, [tex]\rm CCl_4[/tex], and glycerol:

Let [tex]g[/tex] denote the gravitational field strength. (Typically [tex]g \approx 9.81\; \rm N \cdot kg^{-1}[/tex] near the surface of the earth.) For a column of liquid with a height of [tex]h[/tex], if the density of the liquid is [tex]\rho[/tex], the pressure at the bottom of the column would be:

[tex]P = \rho\cdot g \cdot h[/tex].

The pressure at the bottom of this carbon tetrachloride column would be:

[tex]\begin{aligned} P &= \rho \cdot g \cdot h \\ & \approx 1.59\times 10^{3} \; \rm kg \cdot m^{-3} \times 9.81\; \rm N \cdot kg^{-1} \times 3.02 \; \rm m \approx 4.71 \times 10^{4} \; \rm N \cdot m^{-2} \end{aligned}[/tex].

Rearrange the equation [tex]P = \rho\cdot g \cdot h[/tex] for [tex]h[/tex]:

[tex]\displaystyle h = \frac{P}{\rho \cdot g}[/tex].

Apply this equation to calculate the height of the liquid glycerol column:

[tex]\begin{aligned}h &= \frac{P}{\rho \cdot g} \\ &\approx \frac{4.71 \times 10^{4}\; \rm N \cdot m^{-2}}{1.26 \times 10^{3}\; \rm kg \cdot m^{-3} \times 9.81\; \rm N \cdot kg^{-1}} \approx 3.81\; \rm m\end{aligned}[/tex].

Answer:

B

Explanation:

The particles are bound to each other and they vibrate at an almost undetectable rate.

Answer:

Grignard reagent is a chemical compound having a halogen group along with magnesium and organic group.

Explanation:

When cyclopentanol reacts with thiogyl chloride, it gives chlorocyclopentane as the product which on further reaction with magnesium metal gives Grigmard reagent as the main product.

A Grignard reagent is a chemical compound which have the chemical formula of R−Mg−X. Here, R is an organic group, Mg is magnesium and X is halogen. The organic group may be aryl or alkyl.

The reaction and the final product is given below at the attachment.

Answer: It is

Explanation:

Answer:

Explanation:

The acceleration of an object given it's mass and the force acting on it can be found by using the formula

[tex]a = \frac{f}{m} \\ [/tex]

f is the force

m is the mass

From the question we have

[tex]a = \frac{10}{2} \\ [/tex]

We have the final answer as

Hope this helps you

The efficiency : 95%

Efficiency : the ratio between output and input work

In general, the value of the output of a machine is less than the value of the input because of the frictional force in the machine.

The greater the efficiency of the engine, the better the machine

Can be formulated :

[tex]\tt E=\dfrac{W_{out}}{W_{in}}\times 100\%[/tex]

w output = 190 J

W input = 200 J

The efficiency :

[tex]\tt E=\dfrac{190}{200}\times 100\%=95\%[/tex]

Answer:

Why did the fire snake weigh a little bit less than the ingredients it came from? When Zoe weighs the ingredients (sugar and baking soda), it weighs 25 grams in total. When she weighs the “snake” it weighs 23 grams. This is because some carbon dioxide gas produced during the chemical reaction escapes into the air

Brainliest

maybe

Answer:

True

Explanation:

I think the answer is true

gas has little particles that float around but very slowly and split up all around the place