What number balances the equations?!

The Passengers the Balogna could carry if it were filled with hydrogen, and also if it were filled with helium are

\(\begin{tabular}{|l|l|} Passengers with $\quad \mathrm{H}_2:$ & 1007 \\ Passengers with $\mathrm{He}:$ & 928 \\\end{tabular}\)

(h) length of cylinder =100M

(r) radius of cylinder =15M

the volume of a cylinder: \($\pi r^2 \mathrm{~h}=\frac{22}{7} \times(15 \mathrm{~m})^2 \times 100 \mathrm{~m}$$=70714.3 \mathrm{~m}^3$\)

mass of air displaced

\(\begin{aligned}& =1.23 \mathrm{~kg} / \mathrm{m}^3 \times 70714.3 \mathrm{~m}^3 \\& =86978.57 \mathrm{Kg}\end{aligned}\)

when gas is H_2:

Let us assume a number of passengers =x

then, \($x \times 80 \mathrm{Kg}+70714.3 \mathrm{~m}^3 \times 0.090 \frac{\mathrm{kg}}{\mathrm{m}^3}=86978.57 \mathrm{~kg}$\)

x=1007.68 or 1007 people

when gas is{He}_e

then \($\quad x \times 80 \mathrm{~kg}+70714.3 \mathrm{~m}^3 \times 0.18 \frac{\mathrm{kg}}{\mathrm{m}^3}=86978.57 \mathrm{~kg}$\)

x=928.125 or 928 people

ANSWER:

\(\begin{tabular}{|l|l|} Passengers with $\quad \mathrm{H}_2:$ & 1007 \\ Passengers with $\mathrm{He}:$ & 928 \\\end{tabular}\)

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The aldosterone-induced reabsorption of Na+ is coupled with the secretion of K+ and H+ ions in the distal tubules and collecting ducts of the kidneys. This process is known as the renin-angiotensin-aldosterone system (RAAS) and is a crucial component in regulating blood pressure and electrolyte balance in the body.

When aldosterone binds to its receptors in the distal tubules and collecting ducts, it stimulates the synthesis and insertion of Na+ channels and Na+/K+ ATPase pumps into the luminal membrane, increasing Na+ reabsorption. Simultaneously,

it enhances the activity of H+/K+ ATPase pumps and K+ channels in the basolateral membrane, facilitating the secretion of K+ and H+ ions into the tubular fluid. This results in the net reabsorption of Na+ and the elimination of excess K+ and H+ ions from the body.

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Answer:

medium

Explanation:

Answer:

The answer is c( to send signals to control the body)

Answer:

c. To send signals to control the body.

Explanation:

. It is responsible for coordinating and controlling many body activities. It stimulates muscle contraction, creates an awareness of the environment, and plays a major role in emotions, memory, and reasoning..

Answer:

Explanation:

When you are pedaling the bike, it is transforming chemical energy, supplied by the breakdown of the food you eat (any food), into mechanical energy to turn the pedals (energy we produce). The chemical energy is potential and the mechanical energy is kinetic.

Hope this helps :)

Answer:

See below ~

Explanation:

1. C. solid

2. B. tone quality

3. C. pitch

4. D. capable of producing its own light

5. D. stars

Answer:

1. C. solids

2. B. tone quality

3. A. pitch

4. D. capable of producing its own light

5. D. stars

Answer:

1.3155M

Explanation:

molar mass of CuSO4

=63.55+32.07+16(4)

=159.62g/mol

n=mass/molar mass

n=42.00/159.62

n=0.2631mol

volume=200mL=0.2L

molarity=mole (n)/volume (v)

molarity=0.2631mol/0.2L

molarity=1.3155M

Answer:

the child would have a 1 in 2 chances of having a dominant gene

Explanation:

Parent 1         Parent 2

d                     d

r                       r

child

d

d= dominant

r= recessive

For the complex [Co(CO)5]x, the unknown charge (z) would be +1 based on the application of the 18 electron rule.

To find the charge (z) of the complex [Co(CO)5]x using the 18 electron rule, we can follow the steps below:

Identify the metal: In this case, the metal is cobalt (Co).

Determine the number of valence electrons of the metal: Cobalt is a transition metal with atomic number 27. In its neutral state, it has 27 electrons. However, in a complex, cobalt typically contributes all of its valence electrons to bonding, which is 9 electrons (2 from the 4s orbital and 7 from the 3d orbital).

Calculate the total number of electrons contributed by ligands: The ligand in this case is carbon monoxide (CO), which is a strong-field ligand. Each CO ligand contributes 2 electrons (one from the carbon lone pair and one from the oxygen lone pair) for a total of 5 ligands × 2 electrons/ligand = 10 electrons.

Add the valence electrons of the metal and the ligands: Cobalt contributes 9 electrons, and the CO ligands contribute 10 electrons, giving a total of 9 + 10 = 19 electrons.

Apply the 18 electron rule: According to the 18 electron rule, most stable transition metal complexes have 18 valence electrons. However, there can be variations depending on the ligands and the metal's oxidation state.

Determine the charge (z): Since the complex [Co(CO)5]x has 19 valence electrons, which is more than the expected 18 electrons, it suggests that the complex has a positive charge to balance the extra electron(s). Therefore, the charge (z) of the complex would be +1.

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Absorbance and transmittance are two methods used to measure the concentration of a solution. When light is passed through a solution, it can either be absorbed by the solution or transmitted through it.

The relationship between absorbance and transmittance is described by the Beer-Lambert Law, which states that the absorbance of a solution is directly proportional to the concentration of the solute present and the path length of the light through the solution.The equation for the Beer-Lambert Law is A = εbc, where A is the absorbance of the solution, ε is the molar absorptivity (a measure of how strongly a compound absorbs light of a particular wavelength), b is the path length of the light through the solution, and c is the concentration of the solute in the solution. Transmittance is the amount of light that passes through the solution and is given by the equation T = I/I₀, where I is the intensity of light transmitted through the solution and I₀ is the intensity of the incident light.The relationship between absorbance and transmittance can be expressed as follows:A = -log T, where A is the absorbance and T is the transmittance. This relationship shows that as the transmittance of a solution decreases, the absorbance of the solution increases, and vice versa. The absorbance and transmittance of a solution are inversely proportional to each other. As one increases, the other decreases, and vice versa. This relationship can be used to determine the concentration of a solute in a solution by measuring either the absorbance or the transmittance of the solution and using the Beer-Lambert Law to calculate the concentration.

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Answer:

yellow is false and black is true.

Specific heat is used to explain why different substances changes the temperature at different rate.

Temperature is a physical quantity which is expressed as quantitatively the perceptions of the coldness and hotness. Temperature is measured with a thermometer.

It is defined as the amount of heat which is used to require to increase the temperature by 1°C.

The SI unit thorough which it is measured is J/ g/ °C.

Let's take an example of specific heat of water which is 4.184J/ g/ °C.

Therefore, specific heat is used to explain why different substances changes the temperature at different rate.

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Answer:

Cellular division has three main functions: (1) the reproduction of an entire unicellular organism, (2) the growth and repair of tissues in multicellular animals, and (3) the formation of gametes (eggs and sperm) for sexual reproduction in multicellular animals.

Answer:

There are four key reasons why a cell may be required to divide mitotically:

Tissue repair / replacement.

Organismal growth.

Asexual reproduction.

Development (of embryos)

An example of natural resource that is renewable is wind. Details about natural resources can be found below.

Natural resources are resources that cannot be exhausted i.e. can be replenished with time.

Examples of natural resources are as follows:

Therefore, an example of natural resource that is renewable is wind.

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The natural resource that is renewable is wind. Therefore, option B is correct.

Renewable resources are natural resources that can be restocked or regenerated over a relatively short period of time, usually within a human lifetime. These resources are often contrasted with non-renewable resources, such as fossil fuels, which take millions of years to form and are finite in quantity.

Examples of renewable resources include solar energy, wind energy, hydroelectric power, geothermal energy, biomass, and tidal power.

These resources have the potential to provide energy and other materials indefinitely if used sustainably, making them an important part of efforts to move towards a more sustainable future. Therefore, option B is correct.

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The net ionic equation is applied mainly in neutralization reactions, double displacement reactions and redox reactions. The net ionic equation is as follows

Ca(OH)\(_2\)(s)+2HNO\(_3\)(aq)→Ca(NO\(_3\))\(_2\)(aq)+2H\(_2\)O(l)

The net ionic equation represents a chemical equation of a reaction that give an idea of species that are really participating in the reaction. We can write net ionic equations for those electrolyte which are strong in water.

The balanced net ionic equation is

Ca(OH)\(_2\)(s)+2HNO\(_3\)(aq)→Ca(NO\(_3\))\(_2\)(aq)+2H\(_2\)O(l)

Thus the net ionic equation is

Ca(OH)\(_2\)(s)+2HNO\(_3\)(aq)→Ca(NO\(_3\))\(_2\)(aq)+2H\(_2\)O(l)

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Answer:

Explanations:

The formula for calculating the pH of the solution is given as:

Given that the pH is 2, then;

Hence the concentration of the hydronium ion is 0.01M

Since the pH of the solution is less than 7, hence the solution is acidic

Ten radish seeds were added to container A. Container B had no radish seeds. The purpose of the container B in this experiment is to serve as a control container.

By using controls, the experimenter can reduce the impact of factors other than the one being researched. This allows us to verify that an experiment is testing what it says it is testing. Controls are important for all sorts of experimental testing, regardless of the subject, and this goes beyond science.

Methylene blue is usually employed as a redox indicator in analytical chemistry. The solutions of this chemical are blue when in an oxidizing environment, but turn colorless when exposed to a reducing agent.

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the correct answer is (d) KI.

What is conjugate base?

In chemistry, a conjugate base is the species that is formed when an acid loses a proton (H+). More specifically, the conjugate base of an acid is the species that remains after the acid has donated its proton.

When salts dissolve in water, they may produce acidic, basic, or neutral solutions depending on the nature of the ions present in the salt.

In general, salts that contain the conjugate base of a weak acid or the cation of a strong base will produce a basic solution when dissolved in water.

Among the given options, the salt KI contains the cation K+ which is the conjugate base of a strong acid (potassium hydroxide) and the anion I- which is a weak conjugate base of a weak acid (hydroiodic acid). Since the cation is not acidic and the anion is weakly basic, the resulting solution will be slightly basic. Therefore, the correct answer is (d) KI.

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Answer:t volume and amount of air

Explanation:According to Boyle's law, what is the relationship between pressure and volume? They are inversely related. As one increases, the other decreases

The statement that is true about chemical nutrients in an ecosystem is : D.) They recycle within the ecosystem, being constantly reused. Therefore, option D) is the correct answer.

The nutrient cycle is vital to the ecosystem, and this is how nutrients are recycled in it. Nutrients that are considered chemical nutrients include carbon, hydrogen, oxygen, nitrogen, and phosphorus.What are chemical nutrients in an ecosystem

Chemical nutrients refer to essential elements that are found in an ecosystem's physical and chemical environment. These elements are necessary for life because they are responsible for different functions such as cell structure, the production of enzymes, and the production of hormones.

In conclusion, chemical nutrients recycle within the ecosystem, being constantly reused. Nutrient recycling helps to maintain the ecosystem's sustainability. It helps to maintain the balance of life forms within the ecosystem.

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In the quantum mechanical model of the atom, an electron is viewed as a wave-particle that occupies a three-dimensional space near the nucleus. The movement of the electron is describes be a function, which is also called an atomic orbital.

An electron possesses dual nature, i.e. it has both wave as well as particle nature.  

According to this theory, since there is wave associated with every electron so, it also possesses a wave function ψ.

However, there is no such physical significance of ψ but ψ² has.

ψ² tells the maximum probability of finding an electron in a particular region.

This region where the probability of finding an electron of an atom is maximum is known as atomic orbital.

There are different shapes of the atomic orbitals.

Some of the orbitals and their shapes are mentioned below:

(I) s orbital - spherical

(ii) p orbital - dum-bb-ell

(iii) d orbital - double dum-bb-ell

(iv) f orbital - ( no discrete shape)

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Answer: Thus 9.75 moles of iron will be required.

Explanation:

The balanced chemical reaction is:

\(2Fe+3O_2\rightarrow 2Fe_2O_3\)  

According to stoichiometry :

2 moles of \(Fe_2O_3\) are produced by= 2 moles of \(Fe\)

Thus 9.75 moles of \(Fe_2O_3\) are produced by=\(\frac{2}{2}\times 9.75=9.75moles\)  of \(Fe\)

Thus 9.75 moles of iron will be required.

Answer:

see below (I hope this helps!)

Explanation:

You are a student, therefore, the people who are the same "rank" as you are your fellow students, this makes them your peers.

Answer:

Color Change.

Production of an odor.

Change of Temperature.

Evolution of a gas (bubbles)

Precipitate (formation of a solid)  

There are 5 so you can choose 4.

The four signs that a chemical reaction has occurred are as follows:

A chemical reaction may be defined as a process that significantly involves the chemical transformation of one set of chemical substances to another. This process involves the utilization of substances known as reactants that are transformed into other substances known as products.

Every chemical reaction involves the four signs which are mentioned above. These signs are delivered by chemical reactions along with determined products. But the mass of the reactants and products always remains the same. Precipitation is only visualized in specific reactions with the possessions of certain characteristics.

Therefore, the four signs that a chemical reaction has occurred are well-mentioned above.

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There are 0.5 moles of KOH present in 250 mL of a 2.0 M KOH solution.

To find the number of moles of KOH present in 250 mL of a 2.0 M KOH solution, you can use the formula:

Moles = Molarity × Volume

Molarity (M) is the concentration of a solution, in this case, 2.0 M for KOH. The volume (V) should be in liters, so you need to convert the given volume from milliliters (mL) to liters (L). To do this, divide the volume in milliliters by 1,000:

250 mL ÷ 1,000 = 0.25 L

Now, you can use the formula:

Moles of KOH = (2.0 M) × (0.25 L)

Moles of KOH = 0.5 moles

Therefore, there are 0.5 moles of KOH present in 250 mL of a 2.0 M KOH solution.

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164 g of H₃PO₃ (phosphorus acid) would require 3 moles of H₂O for the reaction.

Given information,

Mass of H₃PO₃ = 164g

Moles of H₃PO₃ = 82 g/mol

The balanced chemical equation:

P₂O₃ + 3H₂O → 2H₃PO₃

For every 2 moles of H₃PO₃ produced, 3 moles of H₂O are required.

The number of moles of H₃PO₃:

Moles of H₃PO₃ = mass of H₃PO₃ / molar mass of H₃PO₃

Moles of H₃PO₃ = 164 g / 82 g/mol

Moles of H₃PO₃ = 2 mol

The number of moles of H₂O:

Moles of H₂O = (3/2) × moles of H₃PO₃

Moles of H₂O = (3/2) × 2 mol

Moles of H₂O = 3 mol

Therefore, 164 g of H₃PO₃ would require 3 moles of H₂O for the reaction.

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Answer:

A

Explanation:

The answer to this question is A. Both ripening and spoiling are chemical reactions.

Spoiling is a chemical reaction because spoiled food has bad smell and taste and it changes colour too.

Ripening of fruits is a chemical change. For example the colour could change as well as the texture.

Answer:

option a) chemical reaction, chemical reaction.

Explanation:

Changes in which new substances with different properties are formed are called chemical changes. Cooking of food, burning of substances are chemical changes as entirely new substances are formed. Burning of a candle wax releases carbon dioxide and water vapour (new substances). in here ripening and spoiling is a change that cannot be reversed which makes it a chemical change.

Answer:

If 50.0 grams of HCl were dissolved in enough water to make a solution with a total volume of 5.0 liters, then the molarity of the solution is 0.282M.

How do we calculate molarity?

Molarity of any solution will be calculated by using the below equation:

M = n/V, where

n = moles of solute

V = volume of solvent in L

Moles will be calculated by using the below equation:

n = W/M, where

W = given mass = 50g

M = molar mass = 35.45 g/mol

n = 50/35.45 = 1.41 moles

On putting values in the above equation, we get

M = 1.41mol / 5L = 0.282M

Hence required molarity of solution is 0.282 M.

Explanation:

The molarity of the solution is 1.11 M (rounded to 2 decimal places). To find the molarity (M) of the solution, we need to know the number of moles of NaCl and the volume of the solution in liters.

Although a solution's molarity is determined by the moles of solute divided by the volume of the solution in litres, a solution's molality is determined by the moles of solute divided by the mass of the solvent in kilogrammes.

The number of moles of NaCl can be calculated using its molar mass and the given mass of NaCl:

Number of moles = mass / molar mass

The molar mass of NaCl is 58.44 g/mol (22.99 g/mol for Na + 35.45 g/mol for Cl).

Number of moles of NaCl = 65 g / 58.44 g/mol = 1.1138 mol (rounded to 4 decimal places)

The volume of the solution is given as 1 liter.

Now we can use the formula for molarity:

Molarity (M) = number of moles / volume (in liters)

M = 1.1138 mol / 1 L = 1.1138 M (rounded to 2 decimal places)

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