How many grams of KCl remain in solution at 20 ∘ C?

Answer:

friction

Explanation:

since it has a high tempature the friction increases like blowing air in a furnace

Answer:

B.

Explanation:

Answer:

bbbbbbbbbbbbbbbbbbb

Explanation:

The four character archetypes are the Hero, he Guide, the Everyman, and the Innocent.

In literary criticism, an archetype is a primal picture, figure, or pattern of situations that recurs across literature and is thought frequently enough to be regarded as a general proposition or scenario (from the Greek archetypos, "original pattern").

Jesus' historical personification of the supreme paradigm, the divine hero, is something we can accept. We might think of him as embodying that archetype and serving as a model about our own humanity. Christianity can be viewed as a way of life as opposed to a belief system.

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Answer:

\(10^{-6} \frac{mol}{L}\)

Explanation:

Comparing to the solution consisting a pH of 5 containing \(10^{-5}\)  \(\frac{mol}{L}\) of hydrogen ions, a solution having a pH of 6 consists of \(10^{-6} \frac{mol}{L}\) of hydrogen ions. A solution having a pH of 7 too will have a pH of \(10^{-7} \frac{mol}{L}\).

Answer:

V = 15.6 L

Explanation:

Hello there!

In this case, according to the definition of molarity in terms of the moles of solute divided by the volume of the solution, it is possible for us to write:

\(M=n/V\)

Thus, given the moles and concentration of the solution, we can find the volume as shown below:

V=n/M

Therefore, we plug in the given data to obtain:

V = 2.5mol /(0.16mol/L)

V = 15.6 L

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The comparison of the overall performance of the portfolios, from best to worst, based on the weighted means, is Portfolio 2 > Portfolio 1 > Portfolio 3. Option B is the correct answer.

For Portfolio 1:

Weighted Mean = ((-0.9% × $750) + (4.2% × $2,570) + (11.8% × $1,990) + (-1.4% × $550) + (18.1% × $1,290)) / ($750 + $2,570 + $1,990 + $550 + $1,290)

For Portfolio 2:

Weighted Mean = ((-0.9% × $640) + (4.2% × $870) + (11.8% × $1,480) + (-1.4% × $1,410) + (18.1% × $1,275)) / ($640 + $870 + $1,480 + $1,410 + $1,275)

For Portfolio 3:

Weighted Mean = ((-0.9% × $350) + (4.2% × $595) + (11.8% × $630) + (-1.4% × $2,280) + (18.1% × $2,120)) / ($350 + $595 + $630 + $2,280 + $2,120)

Now, let's calculate the weighted mean for each portfolio:

For Portfolio 1:

Weighted Mean = ($-6.75 + $108.14 + $235.22 + -$7.7 + $233.79) / $7,150

Weighted Mean = $562.70 / $7,150

Weighted Mean = 0.0787 (approximately)

For Portfolio 2:

Weighted Mean = ($-5.76 + $36.54 + $174.64 + -$19.74 + $230.25) / $4,175

Weighted Mean = $415.93 / $4,175

Weighted Mean = 0.0998 (approximately)

For Portfolio 3:

Weighted Mean = ($-3.15 + $25.02 + $74.34 + -$31.92 + $383.02) / $6,975

Weighted Mean = $447.31 / $6,975

Weighted Mean = 0.064 (approximately)

Based on the recalculated weighted means, the comparison of the overall performance of the portfolios, from best to worst, is:

B. Portfolio 2, Portfolio 1, Portfolio 3

Portfolio 2 has the highest weighted mean, followed by Portfolio 1, and then Portfolio 3.

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The question is -

Use the table to answer the question that follows.

ROR              Portfolio 1                 Portfolio 2             Portfolio 3

-0.9%              $750                            $640                    $350

4.2%               $2,570                         $870                    $595

11.8%               $1,990                         $1,480                  $630

-1.4%               $550                           $1,410                   $2,280

18.1%               $1,290                         $1,275                  $2,120

Calculate the weighted mean of the RORs for each portfolio. Based on the results, which list shows a comparison of the overall performance of the portfolios, from best to worst? (4 points)

A. Portfolio 1, Portfolio 3, Portfolio 2

B. Portfolio 2 Portfolio 3, Portfolio 1

C. Portfolio 3, Portfolio 1, Portfolio 2

D. Portfolio 3, Portfolio 2 Portfolio 1

Explanation:

19/9 F -1 (19 is stacked over 9 next to F) #protons: 9, #neutrons: 10, #electrons: 10

55/26 Fe +3, atomic #: 26, mass #: 55, #protons: 26, #neutrons: 29, #electrons: 23

a. 0.0311 mol of Br₂ is required to react completely with 0.557 grams of Al.

b.  0.00556 mol of HClO₄ is required to react completely with 0.557 grams of Hg.

c.  0.1078 mol of K is required to react completely with 0.557 grams of P.

d. 0.0694 mol of Cl₂ is required to react completely with 0.557 grams of CH₄.

a. Al(s) + Br₂(l) → AlBr₃(s)

The balanced equation is:

2Al(s) + 3Br₂(l) → 2AlBr₃(s)

The molar mass of Al is 26.98 g/mol, so 0.557 g of Al is equivalent to:

0.557 g Al × 1 mol Al / 26.98 g Al = 0.0207 mol Al

According to the balanced equation, the stoichiometric ratio of Al to Br₂ is 2:3. This means that 2 moles of Al react with 3 moles of Br₂. Therefore, to completely react with 0.0207 mol of Al, we need:

0.0207 mol Al × 3 mol Br₂ / 2 mol Al

= 0.0311 mol Br₂

b. Hg(s) + HClO₄(aq) → Hg(ClO₄)₂(aq) + H₂(g)

The balanced equation is:

Hg(s) + 2HClO₄(aq) → Hg(ClO₄)₂(aq) + H₂(g)

The molar mass of Hg is 200.59 g/mol, so 0.557 g of Hg is equivalent to:

0.557 g Hg × 1 mol Hg / 200.59 g Hg

= 0.00278 mol Hg

From the balanced equation, the stoichiometric ratio of Hg to HClO₄ is 1:2. This means that 1 mole of Hg reacts with 2 moles of HClO₄. Therefore, to completely react with 0.00278 mol of Hg, we need:

0.00278 mol Hg × 2 mol HClO₄ / 1 mol Hg

= 0.00556 mol HClO₄

c. K(s) + P(s) → K₃P(s)

The balanced equation is:

6K(s) + P₄(s) → 2K₃P(s)

The molar mass of P is 30.97 g/mol, so 0.557 g of P is equivalent to:

0.557 g P × 1 mol P / 30.97 g P

= 0.01797 mol P

From the balanced equation, the stoichiometric ratio of P to K is 1:6. This means that 1 mole of P reacts with 6 moles of K. Therefore, to completely react with 0.01797 mol of P, we need:

0.01797 mol P × 6 mol K / 1 mol P

= 0.1078 mol K

So, 0.1078 mol of K is required to react completely with 0.557 grams of P.

d. CH₄(g) + Cl₂(g) → CCl₄(l) + HCl(g)

The balanced equation is:

CH₄(g) + 2Cl₂(g) → CCl₄(l) + 2HCl(g)

The molar mass of CH₄ is 16.04 g/mol, so 0.557 g of CH₄ is equivalent to:

0.557 g CH₄ × 1 mol CH₄ / 16.04 g CH₄

= 0.0347 mol CH₄

From the balanced equation, the stoichiometric ratio of CH₄ to Cl₂ is 1:2. This means that 1 mole of CH₄ reacts with 2 moles of Cl₂. Therefore, to completely react with 0.0347 mol of CH₄, we need:

0.0347 mol CH₄ × 2 mol Cl₂ / 1 mol CH₄

= 0.0694 mol Cl₂

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Answer:

red, orange, brown, yellow, black

Explanation:

Answer:

it is 75 degrees

Explanation:

Volume is 138.7 mL.

The equation for calculation of volume is as follows:-

\(\frac{P_1V_1}{T_1} =\frac{P_2V_2}{T_2}\)

STP:-

Temperature=273 K

Pressure=1 atm

\(\frac{1 atm\times250mL}{273 K} =\frac{2 atm\times V_2}{303\ K}\\V_2=138.7\ mL\)

Hence, the volume is 138.7 mL.

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Answer:

From left box to right box: Footwall, fault plane, hanging wall

Explanation:

A foot wall is the one holding us the hanging wall so the highest piece. Think of rock climbing. You put your feet on the wall or rocks to push yourself up. The foot wall is the rocks for the hanging wall.

The hanging wall is the part that's "hanging" from the other wall. So the lowest one. Think of it as the part that's hanging.

A fault plane is where the place where the fault happens which would be where there is the difference in elevations originate from. Think of it like the crack in the middle.

Don't be afraid to reach out if you need further help, I hope this helps!

The formula for the strongest acid is: HF.

To compare the strengths of the given acids, we can use their acid dissociation constants (Ka). The larger the Ka value, the stronger the acid.

The Ka values for the given acids are:

Hypochlorous acid (HClO): Ka = 3.5 × 10^-8

Hydrogen sulfide ion (HS^-): Ka = 1.0 × 10^-7

Hydrofluoric acid (HF): Ka = 6.8 × 10^-4

Comparing the Ka values, we can see that hydrofluoric acid (HF) has the largest Ka value and is therefore the strongest acid among the three given acids.

The formula for the strongest acid is: HF.

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When the temperature of a fixed quantity of gas decreases and the pressure remains unchanged, the volume decreases.

This is used to express the amount of three-dimensional space enclosed by a closed surface.

Decrease in temperature of a fixed quantity of gas and constant pressure won't bring about any change in the volume which was why it was chosen as the most appropriate choice.

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The corrosion rate of steel in seawater will be influenced differently by electrically coupling it to different metals.

a. Silver is a noble metal and provides the highest corrosion resistance.

b and c. Cadmium and zinc both provide good corrosion resistance but to a lesser degree than silver.

d. Tin has the lowest corrosion resistance of the metals listed.

When steel is electrically coupled to these metals, it becomes the cathode and the other metal becomes the anode. This can lead to galvanic corrosion, where the anode (the other metal) corrodes faster than it would have on its own, while the cathode (the steel) corrodes slower or not at all.

Specifically, when steel is electrically coupled to silver, the corrosion rate of the steel will decrease because silver is a more noble metal and will act as the anode. When steel is electrically coupled to cadmium, tin, or zinc, the corrosion rate of the steel will also decrease because these metals are less noble and will act as the anode, protecting the steel from corrosion.

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When steel and zinc were connected, zinc is the cathode. The term cathode refers to the electrode that is reduced during an electrochemical reaction.

The electrons are moved from the anode to the cathode during an electrochemical reaction in order to maintain a current in the wire that links the two electrodes.

According to the galvanic series, zinc is more active than iron, meaning that it is more likely to lose electrons and be oxidized. As a result, when steel and zinc are connected, zinc will act as the anode and lose electrons, whereas iron (steel) will act as the cathode and receive the electrons transferred by zinc.

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21) The correct description of the compounds are options a b c.

14) The correct chemical names are b c d

11) Li forms an ionic compound with fluorine

4) The ending of name (c) would differentiate the two compounds.

The functional group on the chain is carboxyl (a)

We know that the structure of the compound would have to do with the way that the compound can be written. In this case, we have the compound that have been shown and then we have some statements about the molecules.

We must note that the structures show us how the atoms that are in the compounds can be arranged and then we can be able to deduce the structure of the molecule that has been shown.

The compound on the right hand side is a cyclic compound while the compound on the left hand side is a long chain compound. We can now be able to count up the number of the hydrogen and the carbon atoms that are present in each of the compounds.

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Chemical chemical X. The silicon is available. This information is not given here. Therefore, we shall use the atomic number as the amount of protons. So, the solution is 17.

A proton, a quasiparticle, is found in the nucleus of every atom.. The particle has an electrical charge that is positive and opposite to the electron's. A single proton would weigh just 1.673? 10-27 kilos if it were isolated, which is only a little bit less than a neutron.

A subatomic particle with a negative charge is an electron. A proton is an unit of matter with the a positive charge. Protons are bound together in an atom's nucleus by the potent nuclear energy. The neutron is a type of subatomic particle sans charge (they are neutral).

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Answer:

i think the answer is D

Explanation:

Answer:

C: O2

Explanation:

Hope it helps

Peace out

Pls Mark me as brainliest i only want one more for genius :)

Answer:

368.92g

Explanation:

Firstly, let's balance the equation which is

2NO + O₂ ---> 2NO₂

Starting with 8.02 mol of NO let's calculate the moles of oxygen which is in a 2 : 1 molar ratio

2NO + O₂

2 : 1

8.02 mol : x mol

Moles of O₂ = 8.02 ÷ 2 = 4.01 mol

Doing the same thing for 18.75 mol of O₂ to calculate the number of moles of NO

2NO + O₂

2 : 1

x mol : 18.75 mol

Moles of NO = 18.75 × 2 = 37.5 however we are told we have 8.02 moles of NO, so we are unable to use 18.75 mol of O₂

Using 8.02 mol of NO to figure out the number of moles of NO₂ :

2NO : 2NO₂

They have the same molar ratio of 2 : 2, so the number of moles is 8.02

Using formula moles = mass / Molar mass

Rearranging to find mass = moles × molar mass

Molar mass of NO₂ = 14 + 16 + 16 = 46

Mass = 46 × 8.02 = 368.92g

Reaction:

2NO + O₂ → 2NO₂

determine the limiting reactant from the ratio of moles to the reaction coefficient

NO : O₂ = 8.02/2 : 18.75/1 = 4.01 : 18.75

NO as a limiting reactant (smaller ratio)

so mole NO₂ from limiting reactant (NO) :

= 2/2 x mole NO

= 2/2 x 8.02

= 8.02

mass NO₂ = mole x molar mass NO₂ = 8.02 x 46 g/mole = 368.92 g

Answer:

Salt and water is produced.

For example:-

NaOH(base)+HCl(Acid)=>NaCl(salt)+H20(water)

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Answer:

Reagent O₂ will be consumed first.

Explanation:

The balanced reaction between O₂ and C₄H₁₀ is:

2 C₄H₁₀ + 13 O₂ → 8 CO₂ + 10 H₂O

Then, by reaction stoichiometry, the following amounts of reactants and products participate in the reaction:

Being:

The molar mass of the compounds that participate in the reaction is:

Then, by reaction stoichiometry, the following mass quantities of reactants and products participate in the reaction:

If 78.1 g of O₂ react, it is possible to apply the following rule of three: if by stoichiometry 416 g of O₂ react with 116 g of C₄H₁₀, 62.4 g of C₄H₁₀ with how much mass of O₂ do they react?

\(mass of O_{2} =\frac{416grams of O_{2}*62.4 grams ofC_{4}H_{10} }{116 grams of C_{4}H_{10}}\)

mass of O₂= 223.78 grams

But 21.78 grams of O₂ are not available, 78.1 grams are available. Since you have less mass than you need to react with 62.4 g of C₄H₁₀, reagent O₂ will be consumed first.

1. Accept and celebrate differences. One of the biggest challenges we experience in relationships is that we are all different. We can perceive the world in many ways. Certainly astumbling block that we come across when we try to build relationships is a desire or an expectation that people will think like we do and, in this way, it is so much easier to create a rapport. We feel more comfortable when we feel that people “get” us and can see our point of view. Life, however, would be very dull if we were all the same and, while we may find it initially easier, the novelty of sameness soon would wear off. So accepting and celebrating that we are all different is a great starting point.

2. Listen effectively. Listening is a crucial skill in boosting another person’s self-esteem, the silent form of flattery that makes people feel supported and valued. Listening and understanding what others communicate to us is the most important part of successful interaction and vice versa.

Active or reflective listening is the single most useful and important listening skill. In active listening, we also are genuinely interested in understanding what the other person is thinking, feeling, wanting, or what the message means, and we are active in checking out our understanding before we respond with our own new message. We restate or paraphrase our understanding of their message and reflect it back to the sender for verification. This verification or feedback process is what distinguishes active listening and makes it effective.

3. Give people your time. Giving time to people is also a huge gift. In a world where time is of the essence and we are trying to fit in more than one lifetime, we don’t always have the time to give to our loved ones, friends, and work colleagues. Technology has somewhat eroded our ability to build real rapport and we attempt to multi-task by texting and talking at the same time.

Being present in the time you give to people is also important, so that, when you are with someone, you are truly with someone and not dwelling in the past or worrying about the future. The connection we make with other people is the verytouchstone of our existence, and devoting time, energy, and effort to developing and building relationships is one of the most valuable life skills.

The label signal word that indicates a pesticide is least hazardous to humans is "Caution."

Pesticides are labeled with signal words to indicate the level of potential harm they pose to humans and the environment. The four signal words in decreasing order of hazard are Danger, Warning, Caution, and No signal word. The signal word "Caution" indicates that the pesticide is relatively low in toxicity and poses a minimal risk of harmful effects to humans.

However, it is important to note that even pesticides labeled with "Caution" should be used with care and according to the label instructions to prevent any unintended exposure or harm.

It is also essential to follow all safety precautions when using any pesticide and to store and dispose of it properly to avoid any negative effects on humans, animals, and the environment.

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Answer:

8. the formula of the products are CO2(g) , H2O (l) and NaCl (aq)

Explanation:

s- solid

g- gas

l- liquid

aq- aqueous, means acid

These are the products of the equation, you can balance this by searching up a video on how to do so, or use a balance equations calculator online. Balancing is very easy tho.

Answer:

A. All the molecules or atoms in motion have kinetic energy.

B. All the molecules or atoms in motion have thermal energy.

C. Each molecule or atom in motion has thermal energy.

D. Each molecule or atom in motion has kinetic energy.

Explanation: