Can someone help me with this balanced equation?

Answer:Protons carry a positive electrical charge and they alone determine the charge of the nucleus. Adding or removing protons from the nucleus changes the charge of the nucleus and changes that atom's atomic number. For example, adding a proton to the nucleus of an atom of hydrogen creates an atom of helium and thats your answer

Explanation:

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The concentration of potassium in the ECF is controlled by adjustments in the rate of active secretion along DCT of Nephron.

Extracellular fluid, a biological fluid that is not contained within cells. It is found in blood, lymph, body cavities lined with serous (hygroscopic) membranes, cavities and ducts of the brain and spinal cord, muscles and other body tissues. Extracellular fluid (ECF) volume is determined by the balance between sodium intake and renal sodium excretion. Under normal circumstances, large fluctuations in salt intake lead to parallel changes in renal salt excretion such that ECF volume is kept within tight limits.

The main function of the extracellular fluid is that of an exchange medium. The ECF allows cells to exchange dissolved gases, nutrients, and electrolytes between the cell and the rest of the body to create homeostasis.

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Concentration of potassium in the ECF is controlled by adjustments in the rate of active secretion __________.

- along distal convoluted tubule of nephron

- in proximal convoluted tubule of nephron

- in nephron loop

- in glomerulus

Answer:

D because: A Triple bond is when three pairs of electrons are shared between two atoms in a molecule. It is the least stable out of the three general types of covalent bonds.

Answer:

Carbon is stored on our planet in the following major sinks (1) as organic molecules in living and dead organisms found in the biosphere; (2) as the gas carbon dioxide in the atmosphere; (3) as organic matter in soils; (4) in the lithosphere as fossil fuels and sedimentary rock deposits such as limestone, dolomite

The wavelength οf the spectral line prοduced when an electrοn in a hydrοgen atοm undergοes the transitiοn frοm the energy level n=6 tο n=1 is apprοximately 980 nanοmeters.

Wavelength is a term used tο describe the distance between twο adjacent peaks οr trοughs οf a wave. It is usually denοted by the Greek letter lambda (λ) and is measured in units οf length, such as meters, centimeters, οr nanοmeters.

The wavelength οf the spectral line prοduced when an electrοn in a hydrοgen atοm undergοes the transitiοn frοm the energy level n=6 tο n=1 can be calculated using the Rydberg fοrmula:

1/λ = R (1/n1² - 1/n2²)

where λ is the wavelength οf the spectral line,

R is the Rydberg cοnstant (1.097 × 10⁷ m⁻¹),

n1 is the initial energy level (6 in this case), and

n2 is the final energy level (1 in this case).

1/λ = R (1/n1² - 1/n2²)

= (1.097 × 10⁷ m⁻¹) (1/6² - 1/1²)

= (1.097 × 10⁷  m⁻¹) (1/36 - 1/1)

= (1.097 × 10⁷  m⁻¹) (1/36 - 1)

= (1.097 × 10⁷  m⁻¹) (-35/36)

= -1.02 × 10⁶ m⁻¹

Taking the reciprοcal οf bοth sides οf the equatiοn, we get:

λ = -1/(1.02 × 10⁶ m⁻¹)

= 9.80 × 10^-7 m

Finally, cοnverting this tο nanοmeters, we get:

λ = 9.80 × 10⁻⁷ m × (1 nm / 10⁻⁹ m)

= 980 nm

Therefοre, the wavelength οf the spectral line prοduced when an electrοn in a hydrοgen atοm undergοes the transitiοn frοm the energy level n=6 tο n=1 is apprοximately 980 nanοmeters.

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Answer:

i don't think you can, but if you do know let me know

Answer:

Volume = 3.4 L

Explanation:

In order to calculate the volume of CO₂ produced when 15.2 g of CaCO₃ is heated, we need to first write out the balanced equation of the thermal decomposition of CaCO₃:

CaCO₃ (s) + [Heat] ⇒ CaO (s) + CO₂ (g)

Now, let's calculate the number of moles in 15.2 g CaCO₃:

mole no. = \(\mathrm{\frac{mass}{molar \ mass}}\)

                 = \(\frac{15.2}{40.1 + 12 + (16 \times 3)}\)

                 = 0.1518 moles

From the balanced equation above, we can see that the stoichiometric molar ratios of CaCO₃ and CO₂ are equal. Therefore, the number of moles of CO₂ produced is also 0.1518 moles.

Hence, from the formula for the number of moles of a gas, we can calculate the volume of  CO₂:

mole no. = \(\mathrm{\frac{Volume \ in \ L}{22.4}}\)

⇒ \(0.1518 = \mathrm{\frac{Volume}{22.4}}\)

⇒ Volume = 0.1518 × 22.4

                 = 3.4 L

Therefore, if 15.2 g of CaCO₃ is heated, 3.4 L of CO₂ is produced at STP.

The transition that involves the greatest change in energy is the transition shown by (f)

When an electron moves from one energy level to another, this is referred to as an energy transition in an atom. An atom's electrons can be found in various orbitals or energy levels, and because these levels are quantized, only specific values are permitted.

The transition in f involves a movement from n = 1 to n =4 that shows a great involvement of energy for such to occur.

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Answer:

1 mole of ZnCl₂

Explanation:

Just from the stoichiometric equation/ balanced equation:

            Zn(s) + 2HCl(aq) → ZnCl₂(s) + H₂(g)

            1 mole   2 moles    1 mole       1 mole

Therefore: 2 moles of 2HCl produce 1 mole of ZnCl₂

The mass (in grams) of chlorine gas is needed to react with 251 grams of iron is 479 grams. Option C.

To determine the mass of chlorine gas needed to react with 251 grams of iron, we need to use the stoichiometry of the balanced chemical equation:

2Fe + 3Cl2 → 2FeCl3

From the balanced equation, we can see that 2 moles of iron (Fe) react with 3 moles of chlorine gas (Cl2) to produce 2 moles of iron(III) chloride (FeCl3).

To calculate the mass of chlorine gas, we can follow these steps:

Step 1: Convert the given mass of iron (Fe) to moles.

Using the molar mass of iron (Fe), which is approximately 55.85 g/mol, we can calculate the number of moles of iron:

moles of Fe = mass of Fe / molar mass of Fe

moles of Fe = 251 g / 55.85 g/mol

moles of Fe ≈ 4.5 mol (rounded to one decimal place)

Step 2: Use the mole ratio from the balanced equation to find the moles of chlorine gas (Cl2) needed.

From the balanced equation, we know that 2 moles of Fe react with 3 moles of Cl2. Therefore, the moles of Cl2 can be calculated as:

moles of Cl2 = (moles of Fe / 2) * 3

moles of Cl2 = (4.5 mol / 2) * 3

moles of Cl2 ≈ 6.75 mol (rounded to two decimal places)

Step 3: Convert the moles of chlorine gas to grams.

Using the molar mass of chlorine gas (Cl2), which is approximately 70.90 g/mol, we can calculate the mass of chlorine gas:

mass of Cl2 = moles of Cl2 * molar mass of Cl2

mass of Cl2 = 6.75 mol * 70.90 g/mol

mass of Cl2 ≈ 479 grams (rounded to the nearest whole number) Option C is correct.

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Answer:

A) One that occurs on its own

Oxidation in chemistry occurs when the atoms of an element lose electrons and the oxidation state of the element increases while reduction occurs when the atom of an element gains electrons and reduces the oxidation number.

The atom being reduced is the oxidizing agent while the atom being oxidized is the reducing agent.

Oxidation number is the hypothetical charge of an atom within a molecule. The oxidation number of an element can be calculated as follows;

2x - 2(5) = 0

2x - 10 = 0

2x = 10

x = 5

2x - 6 = 0

2x = 6

x = 3

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Answer:

D. all of the above

Explanation:

I just know..

The addition of \(O_2(g)\) will shift the equilibrium towards the right side of the reaction and will consume \(Cl_2(g)\).

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The final temperature of the water is: T_final = 45.0°C

We can use the formula for the specific heat capacity of the water to solve this problem:

q = mcΔT

First, we can calculate the initial energy of the water:

q = mcΔT

q = (10.0 g) (4.184 J/g°C) (25.0°C)

q = 1,046 J

Next, we can calculate the final temperature after absorbing 840 J:

q = mcΔT

840 J = (10.0 g) (4.184 J/g°C) (ΔT)

ΔT = 20.0°C

Therefore, the final temperature of the water is:

T_final = T_initial + ΔT

T_final = 25.0°C + 20.0°C

T_final = 45.0°C

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In order to provide for our basic needs of food, clothing, shelter, health, energy, and pure air, water, and soil, chemistry is crucial.

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Answer:

Explanation:

The force acting on an object given it's mass and acceleration can be found by using the formula

force = mass × acceleration

From the question we have

force = 2 × 20

We have the final answer as

Hope this helps you

Answer: 40N

Explanation:  

Force = mass × acceleration

20 x 2 = force

20 x 2 is 40

Answer 40 N

NOT 40J

Fluorine (F-) is the element with the fewest valence electrons. Seven electrons make up the outermost shell of fluorine, and one of them is unpaired. As a result, fluorine possesses seven valence electrons altogether.

Eight valence electrons are present in magnesium (Mg2+), nine are present in gallium (Ga+), eight are present in argon (Ar+), four are present in carbon (C+), six are present in sulphur (S2-), and seven are present in fluorine (F-).

Fluorine has a lower number of valence electrons than the other elements because it has a greater effective nuclear charge. This indicates that the fluorine atom will take electrons away from its outermost shell since it is more attracted to electrons than the other elements.

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The molecules of a liquid substance are closely packed together to each other. So as a result, liquids are denser than gases.

A mass of gas will have a much larger volume compared to the same mass of liquid. This is because it has a much lower density. The density of gaseous oxygen is 0.0014 g/cm3. Density is ρ=Mass Volume. We know that gas will uniformly occupy more space than liquid whatever volume is available to it. On the other hand, solids and liquids, are closely packed as compared to gas and are high-density materials where ρ is relatively constant.

So we can conclude that the molecules of a liquid substance are closely packed together with each other. So as a result, liquids are denser than gases.

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The enthalpy change for the following reaction:

CH4 + 2O2 = CO2 + 2H2O is (-890) kJ/mol and it is exothermic

The bond enthalpy values for the reactants and products can be used to calculate the enthalpy change for the following reaction:

CH4 + 2O2 = CO2 + 2H2O

The bond enthalpies for the individual bonds in each molecule are:

CH4: C-H bond enthalpy = 413 kJ/mol

H-H bond enthalpy = 436 kJ/mol

O2: O=O bond enthalpy = 498 kJ/mol

CO2: C=O bond enthalpy = 799 kJ/mol

H2O: H-O bond enthalpy = 463 kJ/mol

To calculate the overall enthalpy change for the reaction, we need to add up the bond enthalpies for the reactants and subtract the bond enthalpies for the products.

The enthalpy change for the reaction is calculated as follows:

(1*(C-H bond enthalpy + 3H-H bond enthalpy) + 2(O=O bond enthalpy)) - (1*(C=O bond enthalpy) + 2*(2*H-O bond enthalpy))

= (1*(413 + 3436) + 2498) - (1799 + 2(2*463))

= (-890) kJ/mol

So this reaction is exothermic.

Therefore, the correct answer is as given above

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Answer:

Beryllium Hypochlorite Be(ClO)2 Molecular Weight

Answer:

a. MnO₄⁻ + 8H⁺ + 5Fe²⁺ → 5Fe³⁺ + Mn²⁺ + 4H₂O

b. 18.17% of Fe in the sample

Explanation:

a. In the reaction, Fe²⁺ is oxidized to Fe³⁺ and permanganate, MnO₄⁺ reduced to Mn²⁺, thus:

Fe²⁺ → Fe³⁺ + 1e⁻

MnO₄⁻ + 5e⁻ + 8H⁺ → Mn²⁺ + 4H₂O

5 times the iron and suming the manganese reaction:

MnO₄⁻ + 5e⁻ + 8H⁺ + 5Fe²⁺ → 5Fe³⁺ + 5e⁻ + Mn²⁺ + 4H₂O

b. Moles of permanganate in the titration are:

0.03942L × (0.0281 moles / L) = 1.108x10⁻³ moles of MnO₄⁻

Based on the reaction, 1 mole of permanganate reacts with 5 moles of iron, if 1.108x10⁻³ moles of MnO₄⁻ reacts, moles of iron are:

1.108x10⁻³ moles of MnO₄⁻ × (5 moles Fe²⁺ / 1 mole MnO₄⁻) =

4.431x10⁻³ moles of Fe²⁺. Molar mass of Fe is 55.845g/mol. 4.431x10⁻³ moles of Fe²⁺ are:

4.431x10⁻³ moles of Fe²⁺ ₓ (55.845g / mol) =

Percent mass is:

0.2474g Fe / 1.362g sample ₓ 100 =

The mass percent of iron in the sample is 22.6%.

The net ionic equation of the reaction is;

5Fe^2+(aq) + 8H^+(aq) + MnO4^-   -----> 5Fe^3+(aq) + Mn^2+(aq) + 4H2O(l)

Number of moles of MnO4^-  = 39.42/1000 L × 0.0281 M = 0.0011 moles

If 5 moles of Fe^2+ reacts with 1 mole of MnO4^-

x moles of Fe^2+ reacts with 0.0011 moles

x =  5 moles × 0.0011 moles/1 mole

x = 0.0055 moles

Mass of Fe^2+ =  0.0055 moles × 56 g/mol = 0.308 g

Mass percent of iron = 0.308 g/ 1.362 g × 100/1

= 22.6%

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The molar mass of the unknown gas in the 500 mL flask at stp is 89.7 g/mol

We'll begin by calculating the number of mole of the gas that occupied 500 mL at stp.

Recall at stp:

22400 mL = 1 mole of the gas

Therefore,

500 mL = 500 / 22400 = 0.0223 mole of gas.

Finally, we shall determine the molar mass of the gas. This can be obtained as follow:

Mass of gas = 2 g

Mole of gas = 0.0223 mole

Molar mass = mass / mole

Molar mass of gas = 2 / 0.0223

Therefore, the molar mass of the unknown gas is 89.7 g/mol

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