when a β- particle is emitted from an unstable nucleus, the atomic number of the nucleus:
increases by 1.
increases by 2. decreases by 1.
decreases by 2. does not change.

Answer:

I-123 and I-131

Explanation:

Radioactive iodine takes advantage of the fact that thyroid cells and thyroid cancer cells absorb iodine; therefore, it has been used to diagnose or treat various thyroid disorders. Iodine is made into two radioactive isotopes, I-123 and I-131, that are commonly used in patients with thyroid disease.

Answer:

The number of years it would take you to earn what Mike Trout will earn on his contract is 4,265

Explanation:

Mike Trout of the Los Angeles Angels has a contract worth $426,500,000

On the other side, you earn $100,000 per year.

To calculate the number of years it would take for you to earn what Mike Trout will earn from his contract, you must divide the amount Mike earned by the amount you earned during a year:

$426,500,000 ÷ $100,000 per year= 4,265

The number of years it would take you to earn what Mike Trout will earn on his contract is 4,265

Answer:

summer solstice

Explanation:

on june solstice the northen hemisphere leans more toward the sun giving us longer days and more strong sunlight and It's the opposite in the Southern Hemisphere where june marks the start of winter thus its the shortest day of the year

HC and CO are high and CO₂ and O₂ are low. This could be caused by a rich mixture.

A) rich mixture

If HC (hydrocarbons) and CO (carbon monoxide) levels are high, while CO₂ (carbon dioxide) and O₂ (oxygen) levels are low, it suggests a condition known as a "rich mixture" in the combustion process. A rich mixture refers to an air-fuel mixture in which there is an excess of fuel compared to the amount of air required for complete combustion.

When the fuel-air mixture is rich, it means that there is more fuel available relative to the available oxygen for combustion. This imbalance can occur due to several reasons, such as:

1. Incorrect fuel-to-air ratio: The air-fuel mixture may be adjusted incorrectly, with too much fuel being supplied relative to the amount of air. This can occur due to a malfunctioning fuel injection system.

2. Malfunctioning sensors: The sensors responsible for measuring the oxygen and fuel levels in the exhaust gases, such as the oxygen sensor or air-fuel ratio sensor, may be faulty or contaminated. This can result in inaccurate readings and improper adjustment of the fuel mixture.

3. Clogged air intake or fuel injectors: If the air intake or fuel injectors are clogged, it can disrupt the proper mixing of fuel and air, leading to a rich mixture.

The consequences of a rich mixture include:

High HC levels: A rich mixture results in incomplete combustion, leading to unburned hydrocarbon molecules being released into the exhaust gases. This increases the HC levels.

High CO levels: In a rich mixture, there is an excess of fuel. As a result, some of the fuel does not undergo complete combustion and is converted into carbon monoxide (CO). This leads to elevated CO levels.

Low CO₂ levels: Since there is incomplete combustion in a rich mixture, the amount of carbon dioxide (CO₂) produced is reduced.

Low O₂ levels: A rich mixture consumes most of the available oxygen for combustion, resulting in lower levels of oxygen (O₂) in the exhaust gases.

To know more about rich mixture here

https://brainly.com/question/32482229

#SPJ4

The complete question is:

HC and CO are high and CO₂ and O₂ are low. This could be caused by a  ____?

A) rich mixture

B) lean mixture

C) defective ignition component

D) clogged EGR passage

Carbon Monoxide is a gas that is colorless and odorless. It is generated as a byproduct of burning gas, wood, charcoal, and other organic fuels. Carbon Monoxide is a dangerous pollutant that can be found indoors rather than outdoors in dangerous concentrations.

Carbon Monoxide is a gas that is colorless and odorless. It is generated as a byproduct of burning gas, wood, charcoal, and other organic fuels. Carbon Monoxide is a dangerous pollutant that can be found indoors rather than outdoors in dangerous concentrations. It is critical to keep in mind that Carbon Monoxide concentrations are highest in enclosed spaces. It is a pollutant that is more likely to be found indoors than outside. Carbon Monoxide can be lethal if inhaled in sufficient concentrations.

At lower concentrations, it can cause headaches, nausea, and dizziness. Carbon Monoxide detectors are available to warn you if it is present in the air. Carbon Monoxide is a pollutant that we should be aware of and take precautions against to keep ourselves and our family safe. In conclusion, Carbon Monoxide is a harmful indoor pollutant that should be monitored frequently with alarms, especially in spaces that are not adequately ventilated, and with fuel-burning devices, to avoid dangerous levels that may lead to life-threatening emergencies.

To know more about pollutant visit:

https://brainly.com/question/29594757

#SPJ11

Answer:

Cu₂O

Explanation:

Copper(I) oxide or cuprous oxide is the inorganic compound with the formula Cu₂O. It is one of the principal oxides of copper, the other being or copper (II) oxide or cupric oxide. This red-coloured solid is a component of some antifouling paints.

Solubility refers to the ability of substances to dissolve in a solvent. Of the gases listed here, that which would most likely dissolve in water is;

Carbon dioxide is a gas that has a very high solubility in water. When bubbled through water, 99% of the gas dissolves while 1% of the gas comes off as carbonic acid.

The solubility of carbon dioxide increases with an increase in pressure and decreases with an increase in temperature.

Therefore, option A is correct.

Learn more here:

https://brainly.com/question/24332155

Generally, There are several types of chemical reactions, including synthesis, decomposition, single replacement, double replacement, and combustion.

In conclusion, it is important to understand the different types of chemical reactions as they can have different outcomes and uses in various fields such as chemistry, biology and material science.

Read more about Types of Reactions Analysis and conclusion

https://brainly.com/question/2506879

#SPJ1

Answer:

Explanation:

percent yield is ratio of actual yield or experimental yield divided by theoretical yield multiplied by 100 .

percent yield of 93.4 % means , the actual yield is 93.4 % what was expected from the reaction on the basis of given chemical reaction .

If in the experimental process , some sodium hydrogen carbonate is left unreacted due to absence of reactant HCl which is also required to obtain product , the percent yield will be increased if the required HCl is also provided .

Hence the percent yield will be increased if required HCl is made available .

Answer:

Ca(CO3) --> CaO + CO2

Zn + H2SO4 --> ZnSO4 + 2H2

Explanation:

^^^

Answer:

"A" i'm pretty sure

Hope this helps

Answer:

Explanation:

1. Please provide the enthalpy info - I will work on it with the info

2.

i) Reaction a should be modified to match the number of S in equation:

 2S + 2O2 -> 2SO2     deltaH = -370kJ

ii) Reaction b should be written reversely to match the reactants of SO2:

 2SO2 + O2 -> 2SO3     deltaH = 256kJ

iii) Adding the equations together:

 2S + 3O2 -> 2SO3

iv) Enthalpy of the combined reaction = -370+256 = -114kJ

 It is negative so the reaction is exothermic.

Answer:

Explanation:

1 c. enthalpy change = enthalphies of formation of all products - enthalphies of formation of all reactants =  -526.3 kcal/mol

1 d. C3H8(g) + 5 O2 (g) → 3 CO2 (g)  + 4 H2O (l)    ΔH = -526.3 kcal/mol

133.0 grams and 72.0 grams of Li2CO3 and Ca would be formed respectively.

From the equation of the reaction:

\(2 Li + CaCO_3 ---> Li_2CO_3 + Ca\)

The mole ratio of Li to Li2CO3 is 2:1 while that of Li to Ca is also 2:1.

Mole of 25.0 grams of Li = mass/molar mass

                                        = 25/6.94

                                           = 3.6 moles

Equivalent of mole of Li2CO3 = 3.6/2

                                                  = 1.8 moles

                                              = 1.8 x 73.89

                                              = 133 grams

Equivalent mole of Ca = 3.6/2

                                   = 1.8 moles

                                    = 72 grams

More on stoichiometric calculations can be found here: https://brainly.com/question/2563006?referrer=searchResults

Answer:

the answer is Z b/c wehave to forces and they have different direction. then search the sum of the forces. thus we gain 40 N to right.

The reaction of 2-pentyne (an internal asymmetric alkyne) with H2O, H2SO4, and HgSO4 would undergo acid-catalyzed hydration to yield two ketone products. The predicted organic product is

2- Pentyne + H2O/H2SO4/HgSO4 → 2-Pentanone + 3-methyl-2-pentanone

The first ketone product is 2- pentanone, which is formed by the addition of a water molecule across the triple bond, resulting in the formation of a ketone group.

The second ketone product is 3-methyl-2-pentanone, which is formed by the addition of a water molecule across the triple bond, resulting in the formation of a ketone group. In this case, due to the internal asymmetry of 2-pentyne, the addition can occur on either side of the triple bond, leading to the formation of two isomeric ketones. The given name represents one of the possible isomers.It's important to note that the reaction is acid-catalyzed, with H2SO4 serving as the acid catalyst and HgSO4 playing a role in the overall reaction. The acid catalyst facilitates the addition of water across the triple bond, while HgSO4 helps in activating the triple bond for hydration.

Learn more about Ketone here, https://brainly.com/question/23849260

#SPJ11

Answer:

it's volume also decrease

Answer:

D po ayan po ang sagot ko salamat po

Answer:

the answer is b

Explanation:

i just answer he question and got it right 2022

Answer:

Explanation:

Recall that the density of a gas is its mass to volume ratio,  

ρ

=

m

V

. Therefore, if we can determine the mass of some volume of a gas, we will get its density. The density of an unknown gas can used to determine its molar mass and thereby assist in its identification. The ideal gas law, PV = nRT, provides us with a means of deriving such a mathematical formula to relate the density of a gas to its volume

Answer:

Obtain the relative numbers of atoms of each element in the compound by dividing the number of moles of each element in the 100 g sample by the number of moles of the element present in the smallest amount.

Answer:

Obtain the relative numbers of atoms of each element in the compound by dividing the number of moles of each element in the 100 g sample by the number of moles of the element present in the smallest amount.

Answer:

chemical

Explanation:

Answer:

(Ar, Xe, Rn) is the answer

According to the electronic configuration groups three to twelve have elements with more than one positive oxidation state.

Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.

Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.

Elements undergo chemical reactions in order to achieve stability. Main group elements obey the octet rule in their electronic configuration while the transition elements follow the 18 electron rule. Noble elements have valence shell complete in ground state and hence are said to be stable.

Learn more about electronic configuration,here:

https://brainly.com/question/13497372

#SPJ6

Answer: Van't Hoff factor, i is less than expected from the formula of the compound and this decreases the effective concentration of particles.

Explanation:

Strong electrolytes are defined as the solutions which completely dissociate into their ions.

But, most of the strong electrolytes do not dissociate completely (act ideally) but remain partially undissociated into the ions. Thus, giving a lesser number of ions in the solution than expected.

This means that the Van't Hoff factor, i which denotes the number of ions is less than expected.

As fewer ions are released in the solution, the concentration of the solution is expected to decrease.

Hence, van't Hoff factor, i is less than expected from the formula of the compound and this decreases the effective concentration of particles.

Answer:

2,909 M

Explanation:

molair mass is of.ethylene is 26,04 g/mol

first you need to calculate how much mL 3 kg is. You can do this by using the density of ethylene: 1,1 g/mL.

3000 g x 1.1 = 3300 mL = 3,3 L

Next you need to calculate the amount of moles:

250 g / 26,04 g/mol = 9,60 mol

Now you can calculate the molarity:

9,6/3.3 = 2,909 M

I don't know the answer for the second question. I'm sorry.

Answer:

The particle theory is the belief that everything in our solar system and beyond is made of very small matter called atoms. The 10 mL is a matter in our solar system and even though we cannot see, there are millions- if not billions of smaller particles that make up the liquid. If you view the picture below, you can see that the particles in a liquid are close to one another, particles in a gas are far apart, and a particle in a solid is tightly pushed together. This gives them their distinctive shape. Since this is a liquid, this means that the particles are close together, but not very close. The particles glide over one another. If you want to have more space between the particles and expand the size of the liquid you can boil the water, however boiling the water turns it into gas and causing the liquid to evaporate. Freezing the liquid would cause the particles to be closer packed together, making a solid. The amount of liquid you have can not change. There is still 10 mL even when the liquid is frozen or when the liquid boils into vapor in the air. Therefore using particle theory, we can know that a shape can only expand or shrink when changing states of matter.

I hope this helped & Good Luck <3 !!

Answer:

84 pt =__50.4399___ qt

5.0 gal =___18.9271__ L​

Explanation:

Have A Wonderful Day!!

Answer: 84 pints = 42 quarts

5.9 gallons = 1.89271

Explanation:

The majority of carbonate and phosphate salts are water insoluble. The majority of halide salts (Br-, Cl-, and I-) are water soluble. The majority of silver salts are water insoluble. Group 1 element salts are water soluble. The majority of nitrate salts are water soluble.

Carbonate is the term given to the material with the chemical formula CO3. Carbonate has an electric charge of 2 and is composed of 1 carbon atom and 3 oxygen atoms. Due to its negative charge, carbonate contains 2 more electrons than protons in each of its individual ions.  The organic molecule with the carbonate group C(O-)2, known as a carbonate ester, may also be referred to as a carbonate.

A moderately powerful base is carbonates. Since the carbonate anion can take an ion of hydrogen from water, aqueous solutions are basic. CO32 + H2O -> HCO3 + OH Gaseous carbon dioxide, water, and metal salts are created when carbonates and acids interact. Infusing carbon dioxide gas under pressure into water results in carbonated water. This creates sparkling water, club soda, soda water, seltzer water, and fizzy water, which are all terms for the frothy beverage that is the result. Unless it's seltzer water, salt is typically added to carbonated fluids to enhance flavor.

To know more about Carbonate visit:

https://brainly.com/question/29167877

#SPJ4

The net ionic equation for the reaction of silver chloride (AgCl) with ammonia (NH₃) can be written as follows:

AgCl(s) + 2NH₃(aq) → Ag(NH₃)₂+(aq) + Cl⁻(aq)

An ionic equation is a chemical equation in which the formulas of dissolved aqueous solutions are written as individual ions.  While this form more accurately represents the mix of ions in solution, the presence of so many individual ions can make it harder to visually determine what is occurring in the reaction.

The net ionic equation for the reaction of silver chloride (AgCl) with ammonia (NH₃) can be written as follows:

AgCl(s) + 2NH₃(aq) → Ag(NH₃)₂+(aq) + Cl⁻(aq)

In this reaction, the silver chloride solid reacts with ammonia to form a complex ion called silver ammine complex, Ag(NH₃)²⁺, which is soluble in water. The chloride ion Cl⁻ from silver chloride remains unchanged and remains in the solution as an aqueous ion.

To know more about ionic equation:

https://brainly.com/question/18635091

#SPJ4

There are 6.35 × 10²² CH₄ molecules in the container at STP that is a total of 2.5 liters. To determine the number of molecules of methane gas (CH4) that exists in a container at STP that is a total of 2.5 liters, we first need to know the STP (Standard Temperature and Pressure) values.

These values are 0°C (273.15 K) and 1 atm pressure (101.3 kPa).

So the given parameters in the question are as follows:

Volume = 2.5 Liters

Temperature (T) = 0°C or 273.15 K

Pressure (P) = 1 atm or 101.3 kPa

We can now use the Ideal Gas Law to determine the number of molecules of methane gas that exist in the container at STP.

Ideal Gas Law PV=nRT

where, P = pressure

V = volume

T = temperature

R = universal gas constant

n = number of moles of gas

R = 0.0821 Latm/mol K

The equation can be rearranged as

n = (PV)/(RT)

Where:

n = number of moles of gas

P = pressure

V = volume

T = temperature

R = Universal Gas Constant

Let's calculate the number of moles of methane gas (CH4) that exists in the container at STP:

(P = 1 atm, V = 2.5 L, R = 0.0821 L atm/mol K, T = 273.15 K)n

= (1 atm * 2.5 L)/(0.0821 L atm/mol K * 273.15 K)n

= 0.1056 mol

So, the number of moles of methane gas (CH4) that exists in the container at STP is 0.1056 mol.

Now, we can use Avogadro's number to determine the number of molecules of methane gas (CH4) that exists in the container at STP.1 mol of gas contains 6.022 x 10^23 molecules

So,0.1056 mol of gas will contain

0.1056 mol × 6.022 × 10²³ mol⁻¹

= 6.35 × 10²² CH₄ molecules

To learn more about Standard Temperature and Pressure refer:-

https://brainly.com/question/29129606

#SPJ11

The cation and anion then attract one another through the Coulomb force to form an ionic bond. Each ionic bond is formed between two oppositely charged ions, such as a sodium ion and a chloride ion.  Ionic bonding typically occurs between a metal and a nonmetal. Therefore, option B is the correct answer.

Ionic bond forms between a cation and an anion. Ionic bonds occur when a cation (positive ion) interacts with an anion (negative ion) through the Coulomb force. This electrostatic interaction is so powerful that the two ions become inseparable.The correct option is B. A cation and an anionIonic bonding is a type of chemical bonding in which ions with opposite charges are held together by electrostatic attraction. Ionic bonding takes place when one atom completely removes an electron from another, creating ions. When this occurs, the atom that has lost the electron becomes a cation, and the atom that has gained the electron becomes an anion. The cation and anion then attract one another through the Coulomb force to form an ionic bond. Each ionic bond is formed between two oppositely charged ions, such as a sodium ion and a chloride ion.  Ionic bonding typically occurs between a metal and a nonmetal. Therefore, option B is the correct answer.

To know more about oppositely visit:

https://brainly.com/question/29134649

#SPJ11