According to the graph, which of the following substances is least soluble in 100 grams of water at 50°C?
1. KCI
2. Nacl
3. NHACI
4. HCI

Answer:

It does not dissolve readily.

Explanation:

Explanation:

your protons will likely go towards (2)

leaving you with

FSbF6^-2+ H2C6H4C4

Final answer:

Li3N, or lithium nitride, is primarily an ionic compound formed by the transfer of electrons from lithium to nitrogen, resulting in Li+ cations and N3- anions.

Explanation:

The compound Li3N (lithium nitride) is primarily considered to be ionic in nature. Lithium (Li), being in Group 1 of the periodic table, is a metal, and nitrogen (N2), being in Group 15, is a nonmetal. The electronegativity difference between them is significant, which leads to the formation of ionic bonds as lithium donates electrons to nitrogen, forming cations (Li+) and an anion (N3-). Although lithium can form polar covalent bonds due to its high charge density and the polarizing effect it has on its bonding partners, in the case of lithium nitride, the overwhelmingly dominant type of bonding is ionic.

While lithium can form more covalent type bonds in organometallic compounds, when combined with a nonmetal such as nitrogen, the result is an ionic compound. It is important to consider that while the distinction between ionic and covalent bonds is taught, in reality, there is often a continuum with many compounds exhibiting characteristics of both ionic and covalent bonding. However, based on lithium nitride's composition and attributes, it falls closer to the ionic side of the spectrum.

Answer:

it is option b

Explanation:

this is because neutralisation reaction takes place only between a base and an acid.

now, in OPTION A it is a neutral and base

OPTIONB  it is acid and base

OPTION C both are base

OPTION D  IT IS NOT POSSIBLE

A neutralization reaction involves an acid and a base, with pH levels generally below and above 7 respectively. To identify a combination that would result in such a reaction, we require an acidic and a basic substance. Thus, the correct combination would be option B: a substance with a pH of 2 (acid) and a substance with a pH of 10 (base).

The subject in question pertains to neutralization reactions in chemistry. A neutralization reaction typically involves a strong acid and a strong base reacting to form water and a type of salt. The pH scale measures how acidic or basic a solution is, and ranges from 0 to 14. If we remember that a pH of 7 is neutral, acids are typically represented with a pH less than 7, and bases are represented with a pH greater than 7, we can use that to find our answer.

Based on these principles, options A and C wouldn't yield a neutralization reaction because they both involve a neutral or basic substance with another base. Option D does not guarantee a neutralization reaction either as the two solutions could be both acidic or basic. Therefore, the correct choice would be option B: a substance with a pH of 2 (which would be an acid) and a substance with a pH of 10 (which would be a base). The acid-base combination would result in a neutralization reaction.

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Answer:

Potential energy

Explanation:

The thrown baseball is converting from kinetic energy into potential energy. When it finally stops at a particular height, it attains its maximum potential energy at the position or point.

The more a body speeds, the higher its kinetic energy attained.

As a body comes to rest, at a height, it attains potential energy.

The body during flight decreases in kinetic energy but increases its potential energy due to gravity pulling it to rest.

The answer is Potential Energy.

Reasoning:

The thrown baseball is converting from kinetic energy into potential energy. When it finally stops at a particular height, it attains its maximum potential energy at the position or point. Potential energy is the energy at rest of body. Kinetic energy is the energy due to the motion of body. The more a body speeds, the higher its kinetic energy attained. As a body comes to rest, at a height, it attains potential energy. The body during flight decreases in kinetic energy but increases its potential energy due to gravity pulling it to rest.

Final answer:

The mass of a single water molecule is approximated to be 2.99 × 10^-23 grams, using its molar mass of 18.015 g/mol and Avogadro's number, which indicates the number of molecules in one mole.

Explanation:

To calculate the mass in grams of a single water molecule, we first look at the molar mass of water (H2O) which is 18.015 g/mol. This is because one mole (6.022 × 1023 entities) of water molecules weighs 18.015 grams. The mass of a single water molecule is therefore:
(1 molecule / 6.022 × 1023 molecules/mol) × 18.015 g/mol

Performing the calculation, we find the mass of a single water molecule to be approximately:
(1 / 6.022 × 1023) × 18.015 g

= 2.99 × 10-23 g

The mass of a single water molecule is 2.99 × 10-23 grams.

Answer:

100 atm

Explanation:

Answer:

Option B. 100atm

Explanation:

The following data were obtained from the question:

n = 2moles

V = 0.5L

T = 310K

R = 0.0821 L.atm/mol.K

P =?

The pressure can obtained by doing the following:

PV = nRT

P = nRT /V

P = (2 x 0.0821 x 310)/0.5

P = 100atm

Answer:

Use Hooke's law

Explanation:

Answer :

(1) The number of cups needed are, 0.45 cups.

(2) The number of cups needed are, 5 cups.

Explanation :

Part 1:

First we have to calculate the moles of NaCl.

[tex]\text{Moles of NaCl}=\frac{\text{Mass of NaCl}}{\text{Molar mass of NaCl}}[/tex]

[tex]\text{Moles of NaCl}=\frac{520g}{58.5g/mol}=8.89mol[/tex]

Now we have to calculate the number of cups needed.

As, the number of cups needed for 8.89 mole of NaCl = 1 cups

So, the number of cups needed for 4 mole of NaCl = [tex]\frac{4}{8.89}=0.45[/tex] cups

Thus, the number of cups needed are, 0.45 cups.

Part 2:

Given:

Mass of ice cubes = 1 kg = 1000 g

Now we have to calculate the number of cups needed.

As, the number of cups needed for 220 g of ice = 1 cups

So, the number of cups needed for 1000 g of ice = [tex]\frac{1000}{220}=4.5\approx 5[/tex] cups

Thus, the number of cups needed are, 5 cups.

Answer:

18 g of gaseous water

Explanation:

We are given the equation;

2H2O (g) ----> 2H2 (g) + O2 (g) ∆H = 483.6 kJ

We are required to determine the mass of gaseous water decomposed when the amount of heat absorbed is 241.8 kJ.

From the equation;

2 moles of water are decomposed when 483.6 kJ is absorbed

Therefore;

241.8 kJ will be absorbed to decompose;

 = (2 × 241.8 kJ) ÷ 483.6 kJ

= 1 mole

But; molar mass of water is 18 g /mol

Therefore;

Mass of gaseous water decomposed is 18 g

Answer:

44.01 g/mol because its basically the weight

Explanation: 12.0107 + 15.9994*2

The gfm (Gram Formula Mass) or molar mass of CO₂ (Carbon Dioxide) is calculated by adding the atomic masses of its constituents: one Carbon atom (12.01 g/mol) and two Oxygen atoms (32 g/mol). This adds up to 44.01 g/mol.

You asked for the gfm (Gram Formula Mass) of CO₂. Gram Formula Mass is another term for molar mass, which is calculated by adding up the atomic masses of all the atoms in the molecule. In the case of CO₂, we have one atom of Carbon and two atoms of Oxygen.

The atomic mass of Carbon (C) is approximately 12.01 g/mol, and that of Oxygen (O) is approximately 16.00 g/mol. Since there are two Oxygen atoms, their combined mass is 2 * 16.00 = 32.00 g/mol.

Adding the atomic masses of Carbon and Oxygen together gives us the total gfm of CO2: 12.01 g/mol (Carbon) + 32.00 g/mol (Oxygen) = 44.01 g/mol (for CO₂).

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Answer:a

Explanation: duh man

Answer:

To answer your first question, when the outer layer of aluminum interacts with oxygen, it forms an aluminum oxide layer that is passive. While the outer layer corrodes, it provides a protective coating that protects the inner layer from further deterioration. As a result, aluminum corrosion is beneficial.

To answer your second question, corrosion of iron is a serious problem because almost all things in our civilization is made of iron or one of its alloys, from automobiles to homes, tools to prosthetics.

When you look back at the past of corrosion research, you'll notice that it all began with the question "why does iron rust?" The most powerful organization of corrosion engineers, NACE, crunched the numbers, and the total amount of iron (only in the United States) is in the billions!

When you consider how inexpensive iron is in comparison to other metals, you can see why it is so widely used; and when you consider all of the developments in metallurgy over the last century, you can see how scientists have worked to improve its sturdiness: new alloys with improved corrosion resistance and strength; treatments to postpone corrosion and even attempt to replace it.

Explanation:

I deeply apologize if this is a late or overdue answer. I also hope this answers your original question and if it doesn't, I deeply apologize.

Other than that, I hope this was helpful and I hope you have a pleasant evening :)

Answer:

A

Explanation:

heat energy is transfered through a hot object touching a cold object

Final answer:

Heat energy is the transfer of energy due to a temperature difference between two systems, such as from a warm hand to a colder ice cube. This transfer occurs spontaneously and can result in the change of state of matter, like melting. Heat flows from a higher to a lower temperature and can play a role in various chemical and physical processes.

Explanation:

Energy transfer due to a temperature difference is known as heat energy. This kind of energy transfer occurs because heat is the spontaneous transfer of energy that happens when there is a difference in temperature between two systems. For instance, when an ice cube is held in your hand, the heat from your hand is transferred to the ice cube, causing it to melt.

Thermodynamically, heat energy is the energy that is transferred from one system to another that is not work. This might occur during various processes, such as when electrical energy is converted into light energy in a light bulb and some energy is lost as heat, or during cellular metabolic reactions. Additionally, matter has thermal energy due to the kinetic energy (KE) of its molecules, and temperature corresponds to the average KE of those molecules. Heat energy flows from a higher to a lower temperature, and it can be absorbed or released during chemical and physical processes.

Answer:

101333.33mmHg

Explanation:

The following were obtained from the question:

P1 = at stp = 760mmHg

V1 = 400.0cu.ft

V2 = 3cu.ft

P2 =?

Using Boyle's law equation, we obtained:

P1V1 = P2V2

760 x 400 = P2 x 3

Divide both side by the 3

P2 = (760 x 400) /3

P2 = 101333.33mmHg

The gas must b compressed to a pressure of 101333.33mmHg

Answer:

B)

Explanation:

The layers of the atmosphere are classified by changes in temperature in accordance with height.

Answer:

1. relative time

2.absolute time

Explanation:

Time that is measured in definite periods such as minutes, days, and years is called

a. Relative time.

b. absolute time.

Answer:

3L

Explanation:

The following data were obtained from the question:

V1 (original volume) = 6L

P1 (original pressure) = 1.5 atm

P2 (new pressure) = 2 x P1 ( since the new pressure is doubled)

P2 = 2 x 1.5

P2 = 3 atm

V2 (new volume) =?

Using the Boyle's law equation P1V1 = P2V2, the new volume can be obtain as follow:

P1V1 = P2V2

1.5 x 6 = 3 x V2

Divide both side by 3

V2 = (1.5 x 6)/3

V2 = 3L

From our calculations, the new volume will be half the original volume and this will be 3L

Gallium, because is a post-transition metal

Answer:

D

Explanation:

Answ

D

Explanation:

Any ones whos job requires chemical

Answer:

Fe(s) + 3H2O2(aq) ................. FeO3(s) + 3H2O (l)​

Explanation:

Fe(s) + H2O2(aq) ----------------   FeO3(s) + H2O (l)​

To balance the equation put coefficient of 3 at back of H2O and H2O2

Fe(s) + 3H2O2(aq) ................. FeO3(s) + 3H2O (l)​

To check, the number of atoms of each element on the left must be equal to that of the right.

Element                       Left.                            Right

Fe.                               1                                    1

H.                            3×2=6                                  2×3=6

O.                           3×2 =6.                            3+3 = 6

This shows that the equation is balanced

I hope this was helpful, please mark as brainliest

Answer:

NH3 + H2SO4 ---> ((NH4)2)SO4 + H2O

Explanation:

This is a common reaction; ammonia and sulfate make ammonium sulfate and the excess hydrogen and oxygen(not part of a polyatomic ion) get into the form of H2O

I hope this helps!

(This can commonly be confused as double replacements but hydrogen is in both reactants.)

Answer:

14.64 grams of carbon

Explanation:

The Molecular formula of Glucose is C₆H₁₂O₆.

From the molecular formula, the Molar mass of Glucose is,

Mass of Carbon in Glucose = 6*12 = 72.

Mass of Hydrogen in Glucose = 12*1 = 12.

Mass of Oxygen in Glucose = 6*16 = 96.

Molar mass of Glucose = 72+12+96 = 180 grams.

180 grams of Glucose contains 72 grams of Carbon.

How many grams of Carbon are there in 36.6 grams of Glucose.

180 --> 72

36.6 --> ?

Let it be 'x' grams

Then, by Criss Cross, (x)(180) = (36.6)(72) => x = 14.64 grams.

Therefore 14.64 grams of carbon are there in 36.6 grams in glucose.

Answer:

1258 grams of AgN03

Explanation:

We calculate the weight of 1 mol of AgN03:

Weight 1 mol AgN03= Weight Ag + Weight N +( Weight 0)x3=108g+ 14g+16gx3=170 g/mol

1 mol----170 g AgN03

7,4mol---x= (7,4 mol x170 g AgN03)/1 mol=1258 g AgN03

The pressure exerted by 0.57 moles of CO2 at a temperature of 25°C and a volume of 500 ml is 28 atm.

Explanation:

According to ideal gas law,

                                      PV = nRT

where P represents the pressure of a gas,

          V  represents the volume of a gas,

          n represents the number of moles,

          R represents the gas constant = 0.0821 L atm / mol K.

          T represents the temperature of a gas.

Given V = 500 ml = 0.5 l,           T = 25°C = 298 K,   n = 0.57 mol

                                        PV = nRT

                                           P = nRT / V

                                              = (0.57 [tex]\times[/tex] 0.0821 [tex]\times[/tex] 298) / 0.5

                                          P = 28 atm.

The pressure of a gas is 28 atm.

Final answer:

Using the ideal gas law, the pressure exerted by 0.57 moles of CO₂ gas at a temperature of 25°C and a volume of 500 mL is calculated to be 28.56 atm.

Explanation:

To calculate the pressure exerted by 0.57 moles of CO₂ gas at a temperature of 25°C (which is 298K when converted to Kelvin) and a volume of 500 mL (which is 0.5 L), we can use the ideal gas law equation PV = nRT, where P is pressure, V is volume, n is the number of moles, R is the ideal gas constant (0.0821 L·atm/K·mol), and T is temperature in Kelvin.

To find the pressure (P), we rearrange the equation to P = nRT/V.

Substituting the values into the equation we get: P = (0.57 · 0.0821 · 298) / 0.5

Now, we perform the calculation:

P = (0.57 · 0.0821 · 298) / 0.5 = 28.56 atm

Therefore, the pressure exerted by the CO₂ gas is 28.56 atm.

Answer:

266.67 J/s

Explanation:

Work is said to be done when a force is applied to a certain object. It is given by the expression:

Workdone = Force × distance

However, the power (P) is the quantity or amount of work-done per time which is mathematically expressed as:

P = [tex]\frac{Workdone}{time}[/tex]

Given that:

time = 2.5 hours = (2.5 × 3600) seconds  = 9000 seconds

Force = 32 N

distance = 75 km = (75 × 1000) m = 75, 000 m

∴ Workdone = 32 × 75, 000

  Workdone  = 2,400,000 Joules

Power = [tex]\frac{2,400,000}{9000}[/tex]

Power = 266.67 J/s

Answer:

Explanation:

Given:

Force, f = 32 N

Distance, d = 75 km

1 km = 1,000 m

75 km × 1000 m/1 km

= 75,000 m

Time, t = 2.5 hours

60 secs = 1 min

60 mins = 1 hour

2.5 hours × 60 mins/ 1 hour × 60 sec/1 min

= 9,000 secs

Power = energy/time

Energy = force × distance

Power = (32 × 75,000)/9,000

= 266.67 W

Hey there!

Na + FeBr₂ → NaBr + Fe

Firstly, balance Br.

Two on the left, one on the right. Add a coefficient of 2 in front of NaBr.

Na + FeBr₂ → 2NaBr + Fe  

Next, balance Na.

One on the left, two on the right. Add a coefficient of 2 in front of Na.

2Na + FeBr₂ → 2NaBr + Fe

Lastly, balance Fe.

One on the left, one on the right. Already balanced.

Our final balanced equation:

2Na + FeBr₂ → 2NaBr + Fe

Hope this helps!

Answer:

It will decrease

Explanation:

As the snowball gets bigger, the kinetic energy of the body begins to reduce appreciably.

The condition given in this problem is constant speed.

At constant speed, the snowball is not accelerating and there is no external force acting appreciably on the ball.

   Now, we know that;

        K.E = [tex]\frac{1}{2}[/tex] m v²

m is the mass of the ball

v is the velocity of the ball

  In this scenario, the velocity of the ball is constant and not changing. But the mass of the ball begins to increase, eventually, the kinetic energy of the ball will reduce.

The increasing mass without an appreciable increase in velocity will bring the body to rest as a result of increase inertia of the body.

Answer:

The nucleus

Explanation:

The nucleus controls the metabolic functions of the cell by producing mRNA which encodes for enzymes e.g. insulin. The nucleus controls the structure of the cell by transcribing DNA which encodes for structural proteins such as actin and keratin.

Answer:

A. Air

Explanation:

Lignin which has a glucos link is a unique hydrocarbon comprising 8-20% of the cell wall of plants. It is a complex, dense, amorphous, secondary cell wall polymer found in the trachea elements and sclerenchyma of terrestrial plants.

Since plant absorbs carbon dioxide from air to form glucose and hence, starch; That is the source of carbon to build other macromolecules.

Water which it absorbs from soil is not of carbon content neither do plant take in microorganisms.

Plants obtain the majority of the carbon necessary for building these structural molecules from air

General, plants that have a very strong internal structure can grow larger than other plants because their structure can support their size. They absorbs carbon dioxide from air to form those carbon-containing molecules

Learn more about plants:

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Answer:

1600/27 cubic yards

Explanation:

Convert each of the dimensions into yards, getting 10/3, 20/3, and 8/3. Multiply them all to get 1600/27