Which of the following reactions have a positive AS (Increase in entropy) Select one or more: a. 2NaHCO3(s) --> Na2CO3(s) + CO2(g) + H2O(g) O ( b. MgCO3(s) --> Mgo(s) + CO2(g) ) c. HgO(s) --> Hg(1) + (1/2)O2(g) O d. 2 NO2(g) --> N204 (g) e. Ag (aq) + Cl(aq) --> AgCl(s)

Claim: The genotype of the mother (Lily) is Bb, and the genotype of the father is BB.

Evidence:

1. Two of Lily's children have blonde hair, which is a recessive trait. This indicates that Lily carries the recessive allele for blonde hair (b).

2. Dark hair is the dominant trait, and Lily's husband is the biological father of all three children. Therefore, the father must carry at least one dominant allele (B) for dark hair.

3. All of Lily's children share the same father, so the father must have passed on the dominant allele for dark hair to each child.

4. Since Lily and her husband have three children, and two of them have blonde hair (recessive phenotype), it is likely that Lily is heterozygous for the hair color gene (Bb), while her husband is homozygous dominant (BB).

Reasoning:

Inherited traits are determined by alleles, or alternative forms of a gene. In this case, the gene for hair color has two alleles: B (dominant for dark hair) and b (recessive for blonde hair). The presence of blonde-haired children indicates that Lily carries the recessive allele (b) for hair color, as blonde hair is a recessive trait. Since all of Lily's children share the same father and two of them have blonde hair, it suggests that the father must have passed on the dominant allele (B) for dark hair to each child. This indicates that Lily's husband is homozygous dominant (BB) for the hair color gene. Therefore, the genotype of Lily is Bb, and the genotype of her husband is BB.

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\(O^{2-}\) is the Lewis base in the following reaction:

\(SO_3(g) + O^{2-}(aq)\)   →  \(SO_4^{2-}(aq)\)

Lewis base is a species that donates an electron pair.

In the above-given chemical equation, the \(O^{2-}\)is the lewis base which is donating an electron pair to the central atom of \(SO_3\) to form \(SO_4^{-2}\).

Hence, \(O^{2-}\) is the Lewis base in the following reaction:

\(SO_3(g) + O^{2-}(aq)\)   →  \(SO_4^{2-}(aq)\)

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Explanation:

ionic compunds ............

Answer:

i think its A but im not sure. Hope this helps

Explanation:

Sugar -  Pure substance

Magnesium Ribbon - Pure Substance

Vegetable soup  Heterogeneous mixture

Bath oil - Homogeneous mixture

Tin of assorted biscuits - Heterogeneous mixture

Peanuts and raisins - Heterogeneous mixture

Copper wire - Pure Substance

Bicarbonate of soda  (Baking soda)​ - Pure Substance

The electrons and hydrogens are carried from the Krebs cycle to the electron transport chain using nicotinamide adenine dinucleotide (NADH) and flavin adenine dinucleotide (FADH2) as electron carriers.

During cellular respiration, the Krebs cycle (also known as the citric acid cycle) is a critical metabolic pathway that occurs in the mitochondria of eukaryotic cells. In this cycle, electrons and hydrogens are produced through a series of chemical reactions, resulting in the generation of energy-rich molecules like NADH and FADH2. NADH and FADH2 act as electron carriers, which transport high-energy electrons from the Krebs cycle to the electron transport chain (ETC), the final stage of cellular respiration. NADH and FADH2 donate these electrons to the ETC, a series of protein complexes located in the inner mitochondrial membrane. As electrons pass through the ETC, their energy is used to pump protons across the membrane, creating a proton gradient. This gradient drives the synthesis of ATP, the primary energy currency of cells. In summary, NADH and FADH2 play crucial roles in cellular respiration by carrying electrons and hydrogens from the Krebs cycle to the electron transport chain, facilitating the production of ATP, which is essential for cellular energy production.

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Answer:

See below

Explanation:

First determine the mass (weigh it) .....    then place it in a graduated container of water to see the volume of the object (by the amount of water it displaces)

  then  density  = mass / volume  

Answer:

ok so im gonna go and do some for your latest questions then if thats alright with you

Explanation:

i need points so im trying to help as many people as i can before the end of the day.

but you have to make the questions forst so i can help you understand them

Answer:

Friction is a force that occurs whenever two objects rub against each other, such as a slide and a person's backside. Without friction, a slide would accelerate the rider too quickly, resulting in possible injury. Certain materials called lubricants can reduce the effects of friction. This is why water park slides are much faster than playground slides; the water acts as a lubricant. Sitting on wax paper can also reduce the amount of friction.

Explanation:

Answer:

b

Explanation:

a drug problem consumes the bulk of a persons income because drugs are expensive to buy

A drug problem can quickly consume the bulk of a person income

A drug is any chemical substance that causes a change in an organism's physiology or psychology when consumed. Drug abuse or substance abuse refers to the use of certain chemicals for the purpose of creating pleasurable effects on the brain.

Drug use can have significant and damaging short-term and long-term effects. Taking some drugs can be particularly risky, especially if you take high doses or combine them with other drugs or alcohol.

People of any age, sex or economic status can become addicted to a drug. Certain factors can affect the likelihood and speed of developing an addiction.

The best way to prevent an addiction to a drug is not to take the drug at all. If your doctor prescribes a drug with the potential for addiction, use care when taking the drug and follow the instructions provided by your doctor. Thus you can save your income.

The correct answer is option B.

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Answer:

Pulverized Limestone

Explanation:

Hope it helps!!

The percent composition of hydrogen is 18.3%.

The term percent composition refers to the percentage of a particular component in a compound. It is contained as the ratio of the mass of that component to the total mass multiplied by 100.

From the law of conservation of mass, total  mass of beryllium hydride(BeH2) =  85.2 g

Mass of hydrogen =  15.6 g

Percent composition of hydrogen =  15.6 g/ 85.2 g  × 100/1 = 18.3%

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Answer:

B

Explanation:

Use the molar mass of H2SO4 to get moles of H2SO4; 51.2g/98.079g=0.522

Divide 500 mL by 1000 to get L

Molarity = moles of solute/L of solution; so divide the moles by 0.5L

Answer:18.015 g

Explanation:

Water has a molar mass of 18.015 g/mol . This means that one mole of water molecules has a mass of 18.015 g . So, to sum this up, 6.022⋅1023 molecules of water will amount to 1 mole of water, which in turn will have a mass of 18.015 g

Na2CO3+2HCl⟶2NaCl+H2O+CO2

Law of conservation of mass- It states that for any closed system, the mass of the system always remain constant over time, as mass of system cannot change. Therefore, (mass of Na2CO3+ mass of HCl) should be equal to (mass of residue + mass of CO2)

Mass of Na2CO3=4.2 g

Mass of HCl=10 g

Mass of residue =12 g

Mass of CO2=2.2 g

∴ Mass of Na2CO3+ Mass of HCl=14.2 g

and Mass of residue + Mass of CO2=14.2 g

Therefore, they follow law of conservation of mass.

We think that our dependency is primarily on non-renewable energy sources because these resources are required and important for our daily lives.

We depend on non-renewable energy for example fossil fuels resource because of the reason that they are energy-rich and comparatively cheap to process. But a big problem with fossil fuels resource, apart from them being in limited supply, is that burning them releases carbon dioxide into the atmosphere.

We think today that humanity's use of fossil fuels resource is damaging our environment. Fossil fuels resource which is non-renewable energy cause pollution where they are produced and used, and their continuous use is causing long-term harm to the climate of our planet.

So we can conclude that our dependence on nonrenewable energy sources makes sense because our lives depend on them.

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Answer:

The short general principle of solubility states that "like dissolves like." Solvents that have similar polarity or charge to the solute tend to dissolve it more readily.

Solubility is the ability of a substance to dissolve based on chemical nature, intermolecular forces, and "like dissolves like" principle. Factors like particle size, temperature, and pressure affect solubility. It is expressed as the maximum amount of solute that can dissolve in a solvent.

The modern version of cell theory shows that cell contain hereditary material which is DNA.

DNA is a hereditary material which is present in human beings as well as all other living organisms.  Every cell which is present in an organism's body has DNA  which is the same. Most of the DNA is situated in the cell's nucleus  and small amount of it can be found in the cell's mitochondria as well.

Information which is stored in DNA is stored as codes made up of four chemical bases namely, adenine, thymine , cytosine and guanine.Human DNA consists of 3 billion bases .The order of the bases determines information which is required for building and maintaining an organism.

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The concentration of A and B after 80 s  if the initial concentration of ab is 0.260 m, and the reaction mixture initially contains no products is 0.0091 M.

To find the concentrations of A and B after 80 s, we must write the kinetic data is given as follows for the reaction:

AB ⟶ A + B

Initial rate of the reaction is 1.62 x 10⁻³ mol/L/s

Order of reaction for AB is first order (n = 1). Now, using the first-order rate equation, the concentration of AB at time t, [AB]t can be calculated as follows:

ln [AB]0/[AB]t = k

tHere, [AB]0 is the initial concentration of AB, [AB]t is the concentration of AB at time t, k is the rate constant, and t is the time interval.

To determine the rate constant, we can use the initial rate of reaction.

Initial rate, ri = k[AB]n

Here, n is the order of reaction.

So, k = ri/[AB]n

Substituting the given values:

ri = 1.62 x 10⁻³ mol/L/s[AB]0

= 0.260 mk = ri/[AB]n

= 1.62 x 10⁻³ mol/L/s / (0.260 m)1

= 6.23 s-1

Now, we can use the rate constant to determine the concentration of AB at 80 seconds:

ln [AB]0/[AB]80 = kt

Here, k = 6.23 s-1, [AB]0 = 0.260 m, and t = 80 s.

Substituting the values:

ln (0.260 m)/[AB]80

= (6.23 s-1) (80 s)[AB]80

= [AB]0 e-kt

= (0.260 m) e-(6.23 s-1) (80 s)

= 0.0091 m

Now, since the stoichiometry of the reaction is 1:1, the concentration of A and B will be equal to each other. Therefore, [A]80 = [B]80 = 0.0091 m.

Thus, the final concentrations of A and B are 0.0091 M after 80 seconds.

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Answer: hewo, there! your answer is Below

CH4(g) + 2O2(g) CO2(g) + 2H2O(g) + 802 kJ/mol

Explanation:

Hope this helps!!!

Have a great day!!!

The reaction \(CH_{4} (g)+2O_{2}\) → \(CO_{2}(g) +2H2_{O} (g)+802kJ/mol\)

shows combustion reaction of methane in which energy 802 KJ/mol energy produces.

A combustion reaction occurs when a substance combines with oxygen gas and produces energy in the form of light and heat. One of the reactants in combustion reactions must be oxygen. Water vapor is produced when hydrogen gas is burned.

It can be seen that this reaction give carbon di-oxide and water hence, combustion reaction will show this reaction.

\(CH_{4} (g)+2O_{2}\) → \(CO_{2}(g) +2H2_{O} (g)+802kJ/mol\)

the correct answer will be option (c).

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The atomic ratio of carbon to oxygen in carbon monoxide (CO) is 1:1, and the atomic ratio of carbon to oxygen in carbon dioxide (CO₂) is 2:1.

Firstly, we can analyze the decomposition of carbon monoxide (CO) and carbon dioxide (CO₂) to determine the atomic ratios involved.

Let's denote the atomic ratio of carbon to oxygen in carbon monoxide as x, and the atomic ratio of carbon to oxygen in carbon dioxide as y.

According to the given data;

Decomposition of carbon monoxide (CO);

Oxygen produced = 3.36 g

Carbon produced = 2.52 g

We know that the atomic mass of carbon is 12 g/mol, and the atomic mass of oxygen is 16 g/mol. Using these values, we can calculate the number of moles for each element;

Number of moles of oxygen = mass / atomic mass = 3.36 g / 16 g/mol = 0.21 mol

Number of moles of carbon = mass / atomic mass = 2.52 g / 12 g/mol = 0.21 mol

Since the atomic ratio of carbon to oxygen in carbon monoxide is x, we can write the following equation;

0.21 mol C / (0.21 mol O) = x

Simplifying the equation, we have;

x = 1

Therefore, the atomic ratio of carbon to oxygen in carbon monoxide is 1:1.

Decomposition of carbon dioxide (CO₂);

Oxygen produced = 9.92 g

Carbon produced = 3.72 g

Following the same calculations as before;

Number of moles of oxygen = mass / atomic mass = 9.92 g / 16 g/mol = 0.62 mol

Number of moles of carbon = mass / atomic mass = 3.72 g / 12 g/mol = 0.31 mol

Since the atomic ratio of carbon to oxygen in carbon dioxide is y, we can write the following equation;

0.31 mol C / (0.62 mol O) = y

Simplifying the equation, we have;

y = 0.5

Therefore, the atomic ratio of carbon to oxygen in carbon dioxide is 1:0.5, which can be simplified to 2:1.

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--The given question is incomplete, the complete question is

"Missed this? watch kcv: atomic theory; read section 2.3. you can click on the review link to access the section in your text. carbon and oxygen form both carbon monoxide and carbon dioxide. when samples of these are decomposed, the carbon monoxide produces 3.36 g of oxygen and 2.52 g of carbon, while the carbon dioxide produces 9.92 g of oxygen and 3.72 g of carbon. Calculate the atomic ratio of carbon to oxygen in carbon monoxide, and carbon dioxide."--

The reactants, products and arrow pointing towards products are present in every chemical equation.

Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.

A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .

The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.

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Answer:

The answer is 18.01528.

We assume you are converting between grams H2O and mole.

Explanation:

Given the equation :

CH3OH +Cl2 →← 2 CH3CL + 2OH ^-1

at equilibrium concentration, we have:

(1.5 -2x )/ 5L + (1.0 -x )/5L =2x /5L + 2x /5L

→ (1.5-2x+ 1 -x )/ 5L = 4x /5L

→(0.5 -3x)/5L = 4x/5L (5L in the Left hand side cancels 5L inthe right hand side)

→ 0.5 = 4x +3x

0.5 = 7x

x = 0.5/7

x = 0.071

( Extra note : Now lets test and see if this balances ):

LHS : (1.5 -2x )/ 5L + (1.0 -x )/5L = 0.5 -3x)/5L

= 0.5 - 3(0.071)/5

= 0.287 /5 = 0.05

RHS :4(x) /5 = 4(0.071) /5

= 0.28/5 = 0.05

at equlibrium , LHS = RHS therefore our x value is 0.07

Answer:

-30°C = -22°F

-30°C = 243.15K

Explanation:

For converting Celsius to Fahrenheit, this is the equation-

(-30°C × 9/5) + 32 = -22°F

For converting Celsius to Kelvin, this is the equation-

-30°C + 273.15 = 243.15K

Answer:

1.40

Explanation:

Study Island

The hobo camps located alongside the railroad tracks, holds a unique perspective on life.

Faber, a resident of the hobo camps located alongside the railroad tracks, holds a unique perspective on life. Despite the challenging circumstances he faces, Faber embodies resilience and resourcefulness.

He has learned to navigate the transient nature of his existence, finding solace and companionship within the community of fellow travelers. Faber's experiences have shaped his worldview, instilling in him a deep appreciation for the simplicity and freedom of life on the move.

He finds beauty in the ever-changing landscapes and the connections forged with fellow wanderers.

While Faber's circumstances may be humble, his spirit remains undeterred, reminding us of the resilience of the human spirit and the capacity for finding joy amidst adversity.

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Answer:

first balance the equation:

2SO2+O2=2SO3. BALANCED EQUATION

find the ratio:

2:1:2. SO2:O2:SO3

5.0 moles of SO2 React

1/2×5.0 moles=2.5moles of O2 are needed

The 1.8 moles of the oxygen (O₂) gas are required to react with 3.6 mol SO₂(g).

A chemical equation is a way to represent a chemical reaction in terms of chemical symbols of the reactants and products. The equation in which the number of atoms of chemical substances (reactants and products) is equal on either side of the equation is known as a balanced chemical equation.

Balancing of a chemical equation must follow the law of conservation of mass. The total mass of the elements present on the reactant side must be equal to the total mass of elements present on the product side while obeying this law in a balanced chemical equation.

Given, the chemical equation of the formation of sulphur trioxide is:

2SO₂(g)  + O₂(g)  →  2SO₃(g)

From the above equation, we can say that the two moles of sulphur dioxide react with one mole of oxygen gas to form two moles of sulphur trioxide gas.

3.6 moles of the SO₂(g) react with moles of oxygen gas = 3.6/2 = 1.8 mol

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Answer:

Explanation:

B.Rice grains, which have accidentally been mixed with flour