Pleas help with 2 and 4 for brainliest

Balanced chemical equation:

\(3 Ba(NO3)2 (aq) + 2 K3PO4 (aq) ----- > 6 KNO3 (aq) + Ba3(PO4)2(s)\)

What is double-displacement reaction?

In an aqueous solution, a double-displacement reaction takes place when the positive and negative ions of two ionic compounds exchange positions to form two completely different compounds.

Chemical formula for :

Barium nitrate---> Ba(NO3)2  (aq)

Pottasium Phosphate = K3PO4 (aq)

Reaction between these two is a type of double displacement type reaction in which ions are exchanged , forming

Pottasium Nitrate -----> KNO3 (aq)

Barium Phosphate -----> Ba3(PO4)2 (s)

(aq) means the phase is aqueous and (s) means phase is solid or the compound precipitated out .

Now, writing the molecular formula using the above data , we get:

\(Ba(NO3)2 (aq) + K3PO4 (aq) ------ > KNO3 (aq) + Ba3(PO4)2 (s)\)

A equation is called balanced when number of chemical species are same on both sides of the equation .

Here, in product side there are 3 Ba and 2 (PO4) and only 1 Ba and 1 PO4 in reactant side to balance this let's multiply

2 with K3PO4 on reactant side and ,

3 with Ba(NO3)2 on reactant side

The equation thus becomes:

\(3 Ba(NO3)2 (aq) + 2 K3PO4 (aq) ------ > KNO3 (aq) + Ba3(PO4)2 (s)\)

Now,

There are 6 K atoms on reactant side to balance this let's multiply 6 with KNO3 in product side by doing so we also balanced NO3.

Consequently, the balanced chemical equation is

3 Ba(NO3)2 (aq) + 2 K3PO4 (aq) ----- > 6 KNO3 (aq)  + Ba3(PO4)2(s)

To learn more about double displacement reaction from the given link.

https://brainly.com/question/23918356

#SPJ1

Cap and trade is a system for controlling carbon emissions by allowing companies to trade.

We know that the major issue that faces the planet is the matter of carbon emissions that affect the ecosystem. This carbon emission has caused a steady rise in the temperature of the earth and this is called global warming.

The following is the matching of the terms as shown below;

Cap and trade - A system for controlling carbon emissions by allowing companies to trade

Carbon neutrality - A state of net-zero carbon dioxide emissions

Carbon credit - A permit that allows a certain amount of carbon emissions

Carbon offset - A reduction in greenhouse gas emissions as they are made elsewhere

Learn more about carbon emission:https://brainly.com/question/27519606

#SPJ1

The vapor pressure of carbon disulfide (CS₂) at 0°C is approximately 0.178 torr.

To determine the vapor pressure of carbon disulfide (CS₂) at 0°C, we can use the Clausius-Clapeyron equation:

ln(P₂/P₁) = -(ΔHᵥᵃᵖ/R) * (1/T₂ - 1/T₁)

Where:

P₁ = vapor pressure at temperature T₁ (known)

P₂ = vapor pressure at temperature T₂ (unknown)

ΔHᵥᵃᵖ = molar enthalpy of vaporization

R = gas constant (8.314 J/(mol·K))

T₁ = initial temperature (known)

T₂ = final temperature (unknown)

Given:

ΔHᵥᵃᵖ = 26.74 kJ/mol (convert to J/mol: 26.74 kJ/mol * 1000 J/1 kJ = 26740 J/mol)

T₁ = 46°C (convert to Kelvin: 46°C + 273.15 K = 319.15 K)

T₂ = 0°C (convert to Kelvin: 0°C + 273.15 K = 273.15 K)

R = 8.314 J/(mol·K)

Substituting the known values into the equation:

ln(P₂/P₁) = -(26740 J/mol / 8.314 J/(mol·K)) * (1/273.15 K - 1/319.15 K)

Simplifying the equation:

ln(P₂/P₁) = -3216.11 * (-0.003663 + 0.003128)

ln(P₂/P₁) = -3216.11 * 0.000535

ln(P₂/P₁) ≈ -1.723

To solve for P₂/P₁, we can take the exponential of both sides:

P₂/P₁ = e^(-1.723)

Using a calculator, e^(-1.723) ≈ 0.178

Finally, to find P₂ (vapor pressure at 0°C), we multiply P₁ by P₂/P₁:

P₂ = P₁ * (P₂/P₁)

P₂ = 1 torr * 0.178

P₂ ≈ 0.178 torr

Therefore, the vapor pressure of carbon disulfide (CS₂) at 0°C is approximately 0.178 torr.

Learn more about Vapor pressure from the link given below.

https://brainly.com/question/29640321

#SPJ4

Part A:

BD and PR are strong electrolytes.

AC is a poor electrolyte.

M and N are non-electrolytes.

Part B:

Nitric acid, aluminium chloride, and calcium hydroxide are all strong electrolytes.

Carbonic acid and methyl amine are poor electrolytes.

Sucrose and Ethanol are non-electrolytes.

When asked to define "electrolyte," a chemistry professor would respond that it is a substance that creates ions when dissolved in a solution such as water. Because these ions have a positive or negative electrical charge, we call these substances electro-lytes.

In the area of nutrition, the term "electrolyte" refers to minerals that dissolve in the body's fluids, generating electrically charged ions. The most significant electrolytes in nutrition are sodium, potassium, calcium, magnesium, and phosphate.

When these minerals dissolve in water, they produce electrolytes, which are positive or negative ions that are needed in metabolic activities.

learn more about electrolyte refer:

https://brainly.com/question/17089766

#SPJ4

Answer:

plants

Explanation:

they are plant cells, happy Thanksgiving :)

Answer: photosynthetic tissues

Explanation: Chloroplasts are present in the cells of all green tissues of plants and algae. Chloroplasts are also found in photosynthetic tissues that do not appear green, such as the brown blades of giant kelp or the red leaves of certain plants.

Answer:

Find the molar mass of each individual element, multiply that molar mass number by the element's subscript in the formula, and then add together.

Explanation:

Answer:

This is false: Meiosis is what happens when body cells divide to form identical body cells.

Explanation:

Meiosis is what happens when body cells divide to form identical body cells

Answer:

B

Explanation:

I'm very sure it decreases

While a sample of liquid is freezing, its thermal energy decreases. Therefore, the correct option is option B.

Thermal energy is the internal energy that an object or system has as a result of the movement of its constituent particles. It is a type of kinetic energy that is related to a substance's temperature. A substance's overall thermal energy is impacted by the constantly moving particles that make up the substance. Conduction, convection, and radiation are the three basic ways that thermal energy can move from one thing to another. Heat transfers from the warmer to the cooler object by conduction when two things are in close proximity.

Therefore, the correct option is option B.

To know more about thermal energy, here:

https://brainly.com/question/31631845

#SPJ6

Answer:

Explanation:

CaCO3 = 1*Ca + 1*C + 3*O

              =1*40 + 1*12 + 3*16

               =40 + 12 + 48

               =100 amu

Given the symbol Cl-37, the element is Cl, but there is no information about its charge. When this is like that, it is implicit it is an atom, that is, it is neutral, its charge is 0.

The number indicates is the mass number, so its mass is 37.

So, mass is 37 and charge is 0.

The name of the compound made of magnesium and fluorine is magnesium fluoride and its formula is MgF2. Magnesium fluoride is a white crystalline solid that has a bitter taste and is insoluble in water. Magnesium fluoride is a stable ionic compound with a high melting point.

This compound is the primary source of magnesium and fluoride ions in many industrial and chemical processes. Magnesium fluoride is produced by the reaction between magnesium oxide and hydrogen fluoride.

MgO + 2HF → MgF2 + H2O

In the laboratory, magnesium fluoride is produced by dissolving magnesium hydroxide in hydrofluoric acid.

Mg(OH)2 + 2HF → MgF2 + 2H2O

Magnesium fluoride is used in the production of ceramics and glass as a flux and to increase the resistance of the glass to attack by acids. Magnesium fluoride is also used as an optical coating on lenses and other optical components as it has a low refractive index.

Magnesium fluoride is a white crystalline solid with a bitter taste that is insoluble in water. It is the primary source of magnesium and fluoride ions in many industrial and chemical processes. The formula of magnesium fluoride is MgF2. It is used in the production of ceramics and glass as a flux and to increase the resistance of the glass to attack by acids. Magnesium fluoride is also used as an optical coating on lenses and other optical components as it has a low refractive index.

To know more about magnesium fluoride visit:

brainly.com/question/14829849

#SPJ11

Answer:

1 d. Placing a piece of iron nail in a solution of copper nitrate results in the surface of the iron nail being plated with copper by the reduction of the Cu²⁺ ion in the solution to solid copper which is seen precipitated on the surface of the iron nail

The reaction of the displacement of the copper from the copper (II) nitrate solution by the silver iron in the iron is called a substitution reaction which the NET IONIC equation is given as follows;

Fe(s) + Cu²⁺(aq) → Fe²⁺(aq) + Cu(s)

Explanation:

Answer:

2 electron shells

hope it helps

and your day will be full of happiness

A mineral's crystal classification deals mostly with its Shape (internal arrangement of atoms).

A mineral's crystal classification primarily deals with its internal arrangement of atoms or ions, which ultimately influences its external shape. The arrangement of atoms or ions within a mineral's crystal lattice determines its crystal structure, which is characterized by repeating patterns of the constituent particles.

The crystal structure of a mineral is determined by the arrangement and bonding of its constituent atoms or ions. These arrangements can be described in terms of symmetry and coordination. Symmetry refers to the regular and repeated patterns in which atoms or ions are positioned within the crystal lattice, while coordination describes the number and arrangement of neighbouring atoms or ions around a central atom or ion.

There are several crystal systems used to classify minerals based on their symmetry and external shape. The crystal systems include cubic, tetragonal, orthorhombic, hexagonal, rhombohedral (trigonal), and monoclinic. Each crystal system has its unique set of symmetry elements and characteristic shapes.

The crystal classification of minerals is crucial because it provides valuable information about their internal structure, physical properties, and behaviour. Different crystal structures can affect a mineral's optical properties, cleavage planes, hardness, and other characteristics.

Therefore, while a mineral's shape is a visible manifestation of its crystal structure, the crystal classification primarily focuses on the internal arrangement of atoms or ions within the crystal lattice. The crystal structure, determined by the arrangement and bonding of constituent particles, influences a mineral's external shape, physical properties, and behaviour.

To know more mineral about here

https://brainly.com/question/29970865

#SPJ4

When it comes to fire suppression systems, there are several types available in the market, each with its own set of features and cost implications. The least expensive fire suppression system is usually a portable fire extinguisher.

Portable fire extinguishers are small and portable, making them an ideal choice for small fires that can be easily contained and extinguished. These fire extinguishers are usually filled with a dry chemical, water, or foam, and can be purchased for a relatively low cost.
However, when it comes to larger fires, such as those in commercial or industrial settings, portable fire extinguishers may not be sufficient. In these cases, a more robust fire suppression system is required. Some of the more expensive fire suppression systems include wet chemical systems, carbon dioxide systems, and clean agent systems. These systems can cost tens of thousands of dollars to install and maintain, making them a significant investment.
Overall, the least expensive fire suppression system is typically a portable fire extinguisher. However, it is important to consider the size and scale of your facility and the potential risks associated with a fire when selecting a fire suppression system. It is always best to consult with a fire safety expert to determine which fire suppression system is best suited for your needs and budget.

To know more about fire suppression visit:

https://brainly.com/question/63179

#SPJ11

Answer:

The physical properties of matter are those characteristics that can be measured without altering the atomic structure, while the chemical properties of matter are those characteristics that result in a change in the atomic structure.

Gravity, as a fundamental force of nature, is influenced by several factors. The following are some of the key factors affecting gravity:

The compound with the highest boiling point is \(CH_{3} CH_{2} OH\) .

So, option C is correct one.

The boiling point depend two factors,

The boiling point of ether is less than alcohols because alcohol form hydrogen-bonding .The hydrogen bond is strongest bond. So, ethyl alcohol and methyl alcohol has more boiling point than dimethy ether.

The propane molecules have only van-der waals force of attraction, which is weakest force of attraction.So, propane has lowest boiling point.

The molecular mass of ethanol is greater than methaol. So, ethanol has higher boiling point.

learn more about  boiling point

https://brainly.com/question/2153588

#SPJ4

The ideal gas law formula is used to determine the missing values in questions. When dealing with problems that require solving for missing values using the ideal gas law formula, always ensure that all values are expressed in the correct units and temperature is converted to kelvin.

The ideal gas law formula is represented as PV = nRT, where P represents pressure, V represents volume, n represents the number of moles of gas, T represents the temperature in kelvin, and R represents the universal gas constant. Solve for missing values using the ideal gas law formula:1. 10°C, 5. 5 L, 2 mol, __ atm.The temperature must be converted to kelvin first: T(K) = T(°C) + 273.15K = 10°C + 273.15 = 283.15KPV = nRT

Rearrange the equation to isolate P: P = nRT / V

Substitute the given values:

P = (2 mol)(0.0821 L•atm/mol•K)(283.15K) / 5.5 L

: P = 8.28 atm

2. __ °C, 8. 3 L, 5 mol, 1. 8 atm.The equation PV = nRT can be rearranged to T = PV / nRThe temperature must be converted to kelvin first: T(K) = T(°C) + 273.15T = PV / nR

Substitute the given values: T = (1.8 atm)(8.3 L) / (5 mol)(0.0821 L•atm/mol•K)T(K) = T +

: T = 332 K or 59°C

The temperature must be converted to kelvin first:

T(K) = T(°C) + 273.15K

= 12°C + 273.15

= 285.15

KPV = nRT

Solve for n by rearranging the equation: n = PV / RT

Substitute the given values: n = (1.2 atm)(3.4 L) / (0.0821 L•atm/mol•K)(285.15K): n = 0.141 mol

The ideal gas law formula is used to determine the missing values in questions. When dealing with problems that require solving for missing values using the ideal gas law formula, always ensure that all values are expressed in the correct units and temperature is converted to kelvin.

To know more about ideal gas law visit:

brainly.com/question/30458409

#SPJ11

The pH of the original solution was approximately 5.875.

The Henderson-Hasselbalch equation is given by:

pH = pKa + log([A-]/[HA])

First calculate the concentration of the weak acid after the addition of HCl:

Initial concentration of weak acid = 0.1 M

Volume of weak acid = 100 mL = 0.1 L

Moles of weak acid = concentration * volume = 0.1 M * 0.1 L = 0.01 moles

Concentration of HCl = 1 M

Volume of HCl = 6 mL = 0.006 L

Moles of HCl = concentration * volume = 1 M * 0.006 L = 0.006 moles

After the addition of HCl, the moles of the weak acid will be reduced by the moles of HCl:

Final moles of weak acid = initial moles of weak acid - moles of HCl = 0.01 moles - 0.006 moles = 0.004 moles

Volume of the final solution = initial volume of weak acid + volume of HCl = 100 mL + 6 mL = 106 mL = 0.106 L

The concentration of the weak acid in the final solution = final moles of weak acid/volume of final solution = 0.004 moles / 0.106 L = 0.0377 M

Now using the Henderson-Hasselbalch equation to calculate the pH of the original solution:

pH = pKa + log([A-]/[HA])

pH = 6.3 + log(0.0377/0.1)

pH = 6.3 + log(0.377)

pH = 6.3 + (-0.425)

pH ≈ 5.875

So, the pH of the original solution was approximately 5.875.

If a strong base was added instead of strong acid, the pH of the solution would increase. The strong base would react with the weak acid, forming the conjugate base of the weak acid and water. This would shift the equilibrium towards the conjugate base, resulting in an increase in pH.

To calculate the concentration of protons in the original weak acid buffer solution, you can use the equation:

[H+] = 10^(-pH)

[H+] = 10^(-5.875)

[H+] ≈ 1.3 x 10^(-6) M

To calculate the concentration of hydroxide ions in the original weak acid buffer solution, you use the equation:

[OH-] = Kw / [H+]

Kw is the ion product of water, which is equal to 1 x 10^(-14) at 298 K.

So,

[OH-] = (1 x 10^(-14)) / (1.3 x 10^(-6))

[OH-] ≈ 7.7 x 10^(-9) M

Learn more about pH solutions at: https://brainly.com/question/26424076

#SPJ4

Answer:

The number of valence electrons

STP (Standard Temperature and Pressure):

At STP, 1 mole of an ideal gas will occupy a volume of 22.4 liters (Note: the new defined STP volume is 22.7 liters).

The volume is 77 L .

3 moles of oxygen at STP will occupy a volume of 3×22. 4=67. 2 L.

1.5 moles of oxygen at stp = 22.4 x 1.5 = 33.6 litres.

Therefore , number of moles of oxygen is : Now , we know volume of 1 mole of gas at S.T.P is 22.4 liters . Therefore , volume of 0.1 mole of oxygen at S.T.P is : Therefore , the volume of 3.2 gram atom of oxygen at S.T.P is 2.24 liters .

Helium is the largest, so that’s going to have the largest volume. Because at STP, volume was going to be equivalent to moles of gas.

Therefore, chemists introduced the concept of molar volume. Molar volume of a gas is defined as the volume of one mole of the gas. Thus, the molar volume is also the volume occupied by 6.02 x 1023 particles of gas. The molar volume of any gas is 22.4 dm3 mol–1 at STP or 24 dm3 mol–1 at room conditions.

oxygen gas

One mole of oxygen gas occupies 22.4 l volume at STP.

67.2 liters

The answer depends on the temperature and pressure. If the gas is at STP, THE 1 mole is 22.4 liters. 3 moles x 22.4 L/mol = 67.2 liters.

Well, assuming that the hydrogen gas is contained at STP , then the molar volume would be 22.7⋅3=68.1 L .

0.5 moles⋅22.4 L/mol=11.2 L , and so on.

The molar volume of any gas at S.T.P. is 22.4L .

So, the volume of an ideal gas is 22.41 L/mol at STP. This, 22.4 L, is probably the most remembered and least useful number in chemistry.

At STP, one mol of Ideal Gas occupies 22.4 L and one mmol of Ideal Gas occupies 22.4 mL.

Answer:

its 19 I'm pretty sure about

Answer:

c is correct and my girl friend

To find the mass percent composition of an element, divide the mass contribution of the element by the total mass then multiply by 100.

The total mass = 200.0 g

Phosphorus mass = 87.28 g

Oxygen mass = 112.72 g

%composition of P:

=> (87.28 g/200.0g)*100

=> 43.64 %

%composition of O:

=> (112.72g/200.0 g)*100

=> 56.36 %

Answer:

See Explanation

Explanation:

It is a common observation that a strip of aluminium metal in aqueous copper(II)Sulfate does not show any visible reaction. Aluminium is normally expected to displace copper in solution since it is higher than copper in the electrochemical series.

The reason for this is that aluminium forms an oxide film around its surface which prevents reaction with aqueous copper(II)Sulfate. This oxides film protects the aluminium surface such that it is now unable to react with the aqueous copper(II)Sulfate

The final pressure of the gas is 3480 mm Hg. The gas was compressed from 17.0 L to 2.8 L at a constant temperature.

To find the final pressure of the gas, we can use Boyle's Law, which states that for an ideal gas at a constant temperature, the product of its initial pressure and volume is equal to the product of its final pressure and volume (P1V1 = P2V2). In this case, the initial volume (V1) is 17.0 L, the initial pressure (P1) is 580 mm Hg, and the final volume (V2) is 2.8 L. By substituting the given values into the equation and solving for the final pressure (P2), we can determine that the final pressure of the gas is 3480 mm Hg.

Calculation steps:
1. Write the Boyle's Law equation: P1V1 = P2V2
2. Substitute the given values: (580 mm Hg)(17.0 L) = P2(2.8 L)
3. Solve for P2: P2 = (580 mm Hg)(17.0 L) / (2.8 L)
4. Calculate P2: P2 = 3480 mm Hg

To know more about Boyle's Law visit:

https://brainly.com/question/1696010

#SPJ11

Answer:

In chemistry, an ionic compound is a chemical compound composed of ions held together by electrostatic forces termed ionic bonding

Answer:

An Ionic compounds are compounds consisting of ions also held together by the attractive forces among the oppositely charged ions.

Explanation:

For example :

NaHCO3, sodium bicarbonate (baking soda; used in cooking)

NaCl, sodium chloride (common/ordinary salt)