bro needs help

32.5 grams of NaOH reacts with an excess of CO2

2NaOH(s) + CO2(g) ⇒ Na2CO3(s) + H20

What is the theoretical yield of Na2CO3 in grams?

*** I NEED YOU TO SHOW YOUR WORK BROS, I ALREADY HAVE THE ANSWER (43.1g) ***

The 85th percentile of blood pressure readings is approximately 137.64. a. To calculate the z-score for a blood pressure reading of 140, we can use the formula:

z = (x - μ) / σ

where x is the value (140 in this case), μ is the mean (121), and σ is the standard deviation (16).

Substituting the values into the formula:

z = (140 - 121) / 16

z ≈ 1.19 (rounded to two decimal places)

b. To find the proportion of Canadians with high blood pressure, we need to calculate the area under the normal distribution curve for values above 140. This can be done by finding the cumulative probability using the z-score.

Using a standard normal distribution table or a calculator, we can find that the cumulative probability corresponding to a z-score of 1.19 is approximately 0.881.

Therefore, the proportion of Canadians with high blood pressure is approximately 0.881 (rounded to four decimal places).

c. To find the proportion of Canadians with systolic blood pressure in the range from 100 to 140, we need to calculate the area under the normal distribution curve between these two values.

Using the z-scores corresponding to 100 and 140, we can find the cumulative probabilities for each value. The cumulative probability for a z-score of -1.25 (corresponding to 100) is approximately 0.105, and the cumulative probability for a z-score of 1.19 (corresponding to 140) is approximately 0.881 (as calculated in part b).

The proportion with systolic blood pressure between 100 and 140 is the difference between these two probabilities:

Proportion = 0.881 - 0.105 ≈ 0.776 (rounded to four decimal places)

d. The 85th percentile represents the value below which 85% of the blood pressure readings fall. To find the 85th percentile, we need to determine the z-score that corresponds to an area of 0.85 under the normal distribution curve.

Using a standard normal distribution table or a calculator, we can find that the z-score corresponding to an area of 0.85 is approximately 1.04.

To find the actual blood pressure reading at the 85th percentile, we can use the z-score formula:

x = μ + (z * σ)

Substituting the values:

x = 121 + (1.04 * 16)

x ≈ 137.64

Therefore, the 85th percentile of blood pressure readings is approximately 137.64.

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Answer:

true

Explanation:

Answer:

\(\boxed {\boxed {\sf False}}\)

Explanation:

We want to know if 50 grams of iron (II) sulfide contains 3.011 * 10²³ molecules.  Let's calculated and check.

We know there are 50 grams of iron (II) sulfide or FeS If we want to convert from grams to moles, we use the molar mass (mass per 1 mole). This is given to us and it is 87.91 grams per mole for this substance. Let's create a ratio.

\(\frac {87.91 \ g \ FeS}{ 1 \ mol \ FeS}\)

We want to convert 50 grams of FeS to moles, so we multiply by this value.

\(50 \ g \ FeS *\frac {87.91 \ g \ FeS}{ 1 \ mol \ FeS}\)

Flip the ratio so the grams of FeS cancel.

\(50 \ g \ FeS *\frac {1 \ mol \ FeS}{ 87.91 \ g \ FeS}\)

\(50*\frac {1 \ mol \ FeS}{ 87.91}\)

\(\frac {50}{ 87.91} \ mol \ FeS\)

\(0.5687635081 \ mol \ FeS\)

1 mole of any substance contains the same number of particles (atoms, molecules, formula units, etc.). This is Avogadro's Number or 6.022 *10²³. In this case, the particles are molecules of FeS. Create another ratio.

\(\frac {6.022 *10^{23} \ molecules \ FeS}{ 1 \ mol \ FeS}\)

We want to convert 0.5687635081 moles of FeS to molecules, so we multiply by this value.

\(0.5687635081 \ mol \ FeS*\frac {6.022 *10^{23} \ molecules \ FeS}{ 1 \ mol \ FeS}\)

The units of moles of FeS cancel.

\(0.5687635081 *\frac {6.022 *10^{23} \ molecules \ FeS}{ 1 }\)

\(0.5687635081 *{6.022 *10^{23} \ molecules \ FeS}\)

\(3.42509385*10^{23} \ molecules \ FeS\)

If we round to the thousandth place, the 0 in the tenth thousandth place tells us to leave the 5.

\(3.425*10^{23} \ molecules \ FeS\)

50 grams of iron (II) sulfide is approximately 3.425 * 10²³ molecules, not 3.011 *10²³ so the statement is false.

Answer:

The molar mass of \(NI_{3}\) is 394.719 g/mol.

Explanation:

This was on my periodic table.

Answer:

ions

ph scale

neutral

basic

acidic

Explanation:

hopefully I got it right u welcome :)

The 1 m solutions of C6H1O6 have the highest vapor pressure at a given temperature.

Vapor pressure is defined as the tendency of a liquid to convert into a vapor state. The vapor pressure depends on temperature, surface area, intermolecular forces, and the number of moles of a substance.

The higher the number of moles of particles in solute, the lower the vapor pressure and vice versa.

C6H12O6 has the highest vapor pressure among the given options because it has the lowest number of moles or particles in the solute. The remaining options have more moles of particles in the solute.

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Based on the data below, the elements that the star contains is a combination of Hydrogen and Helium. (Option A)

It is to be noted that Hydrogen is a simple atom with a straightforward spectrum. Aside from the three lines seen above, another in blue at 410 nm may be visible.

However, Helium, on the other hand, is a little more complicated than hydrogen, with one yellow line and a number in blue.

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The correct equation for equilibrium constant is K = [CO][Cl₂] / [COCl₂].

Here K is the equilibrium constant and value of K is define as the ratio of the product of the concentration of the formed products to the product of the concentration of the reactants.

Given chemical reaction is:

COCl₂(g) ⇄ CO(g) + Cl₂(g)

In the equilibrium state, equilibrium constant will be written as:

K = [CO][Cl₂] / [COCl₂]

Hence, the correct equation for the value of the equilibrium constant is K = [CO][Cl₂] / [COCl₂].

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Answer:

Explanation:

b

When the three different phase compounds are mixed, and treat my mixture with aqueous NaOH the acidic mixture remain in the organic phase. So, right answer is option(b).

We have, a mixture which contain three compounds a,b and n. Here, a is acidic, b is base and n is non-acidic in nature. Then this mixture is treated with aqueous NaOH solution. As we know that NaOH is strong base so in order to divert our mixture to organic phase we need acidic mixture A to follow the acid - base extraction. The acid-base extraction method is used to separte the acidic, basic and the neutral compound. This is also known as liquid-liquid extraction. We can add add mineral base for an acidic and neutral compound to start and to take the proton away from the acidic compound. Because the acidic compound is ionic and water-soluble. So, the remained organic phase of solution is acidic.

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Complete question :

I have a mixture of 3 compounds: a is acidic, b is basic and n is non acidic. if i treat my mixture with aqueous naoh, which compound(s) will remain in the organic phase?

a) N ( neutral mixture)

b) A ( acidic mixture)

c) B ( basic mixture)

d) None of the above.

So, the volume of the gases at STP is approximately \(2.54 * 10^{-5} m^3.\)

The volume of a gas at STP (standard temperature and pressure) can be calculated using the ideal gas law, which states that PV = nRT, where P is the pressure, V is the volume, n is the number of moles of gas, R is the gas constant, and T is the temperature in Kelvin.

To find the volume of \(CO_2\) at STP, we need to know its molar volume at STP, which is approximately 8.08 x 10^-6 m^3/mol.

Therefore, the volume of \(3.20 * 10^{-3\) mol \(CO_2\) at STP can be calculated as follows:

V = nRT / P

V =\((3.20 * 10^{-3} mol) * (8.08 * 10^{-6} m^3/mol) * (8.314 J/(mol*K)) * (273.15 K) / (1 atm)\)

V ≈ \(2.54 * 10^{-5} m^3.\)

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Answer:

Molecular Formula  C5H8

Explanation:

There are 6 σ bonds and 3 π bonds in H₃C-CH₂-CH═CH-CH₂-C≡CH.

In the given chemical structure, σ (sigma) bonds are formed by the overlap of atomic orbitals in a head-to-head fashion. These bonds allow for the sharing of electrons between the atoms involved. Each single bond, whether between carbon and hydrogen or carbon and carbon, is a σ bond. Therefore, we count the number of single bonds to determine the number of σ bonds.

In this molecule, there are six single bonds: three between carbon and hydrogen  and three between carbon and carbon.Hence, there are 6 σ bonds in total.

In the given structure, there are three double bonds: one between carbon atoms (═), one between carbon and carbon (ch═ch), and one between carbon and carbon (c≡ch). Each double bond consists of one σ bond and one π bond.

Therefore, there are 6 σ bonds and 3 π bonds in the given chemical structure.

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Photosynthesis in a typical plant requires 8 photons at 550 nm to produce 1 molecule of ATP. The overall efficiency of this process 1.66%.

Photosynthesis is the process by which plants convert sunlight, carbon dioxide, and water into glucose and oxygen. This process requires energy in the form of ATP, which is produced through the electron transport chain during the light-dependent reactions of photosynthesis. The efficiency of photosynthes ATP. According to the question, 8 photons at 550 nm are required to produce one molecule of ATP, and each ATP molecule provides 0.30 eV of energy.
To calculate the efficiency, we first need to convert the energy provided by one ATP molecule from eV to Joules (J). 1 eV is equal to 1.6 x \(10^{-19}\) J, so 0.30 eV is equal to 4.8 x \(10^{-20}\)J.
Next, we can calculate the energy provided by 8 photons at 550 nm. The energy of one photon can be calculated using the equation E = hc/λ, where E is energy, h is Planck's constant, c is the speed of light, and λ is the wavelength of the photon. Plugging in the values for h, c, and λ, we get:

E = (6.626 x 10^-34 J.s)(3.00 x \(10^{8}\) m/s)/(550 x  \(10^{-9}\)m) = 3.61 x  \(10^{-19}\)J

Multiplying the energy of one photon by 8 gives us the total energy required to produce one molecule of ATP:

8 x 3.61 x  \(10^{-19}\)J = 2.89 x \(10^{-18}\) J

Finally, we can calculate the efficiency of photosynthesis by dividing the energy provided by one ATP molecule by the total energy required to produce one ATP molecule: 4.8 x \(10^{-20}\) J / 2.89 x  \(10^{-18} J = 0.0166 or 1.66%. Therefore, the overall efficiency of photosynthesis in a typical plant, based on the given information, is approximately 1.66%.

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Answer:

23.8g

Explanation :

Convert 2.0M into mol using mol= concentration x volume

2.0M x 0.1L (convert 100mL to L since the units for M is mol/L)

= 0.2 mol

We can now find grams by using the molar mass of KBr

=119.023 g/mol (Found online) webqc.org

but can be be calculated by using the molecular weight of K and Br found on the periodic table

We can now calculate the grams by using grams=mol x molar mass

119.023g/mol x 0.2mol

= 23.8046 g

=23.8g (rounded to 1decimal place)

The standard heat (Δ\(H_{f}\)) of compound formed will be 2441.34 KJ.

Given in question:

Molecular formula of \(C_{4}H_{4}\) = 54 g/mole

mass of water = 35.00 kg,

Specific heat = 4.184 J/g °C,

Change in temperature = 3.396°C.

Heat energy is calculated using this formula: Q = msΔT.

=>35×1000 × 4.184 × 3.396 = 497.31 KJ.

∴ Standard heat of the compound X will be

=> Δ\(H_{f}\) = (54 × 497.31)/11 = 2441.34 KJ.

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The net ionic equation focuses on the species that are directly involved in the reaction, highlighting the formation of solid calcium sulfate (CaSO4).

The reaction between sodium sulfate (Na2SO4) and calcium chloride (CaCl2) can be represented by the following balanced chemical equation:

Na2SO4(aq) + CaCl2(aq) → 2NaCl(aq) + CaSO4(s)

To write the complete ionic equation, we need to break down all the soluble compounds into their respective ions:

Na2SO4(aq): 2Na⁺(aq) + SO4²⁻(aq)

CaCl2(aq): Ca²⁺(aq) + 2Cl⁻(aq)

2NaCl(aq): 2Na⁺(aq) + 2Cl⁻(aq)

CaSO4(s): CaSO4(s)

By substituting the ions into the balanced chemical equation, the complete ionic equation is:

2Na⁺(aq) + SO4²⁻(aq) + Ca²⁺(aq) + 2Cl⁻(aq) → 2Na⁺(aq) + 2Cl⁻(aq) + CaSO4(s)

In the complete ionic equation, the ions that appear on both sides of the equation (Na⁺ and Cl⁻) are called spectator ions. They do not participate in the actual chemical reaction and can be eliminated from the equation. Simplifying the equation by removing the spectator ions gives the net ionic equation:

SO4²⁻(aq) + Ca²⁺(aq) → CaSO4(s)

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The respective atomic number, mass number, protons, electrons and neutrons of the following atoms are as follows:

The atomic number of an element is the number of protons in the atom of that element. In a neutral atom, the number of protons is same as the number of electrons.

However, the mass number is the sum of the number of protons and neutrons in the atom.

This means that we can get the number of neutrons in an atom of an element by subtracting the number of protons/atomic number from the mass number.

Therefore, based on the above explanation, the respective atomic number, mass number, protons, electrons and neutrons of the following atoms are as follows:

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An electrovalent or ionic bond is a type of chemical bond that occurs between two atoms when one or more electrons are transferred from one atom to another. This results in the formation of two ions with opposite charges that are attracted to each other by electrostatic forces, forming an ionic bond.

Typically, an ionic bond occurs between a metal and a nonmetal. The metal atom loses one or more electrons to become a positively charged ion or cation, while the nonmetal atom gains one or more electrons to become a negatively charged ion or anion. For example, in the formation of sodium chloride (NaCl), sodium donates an electron to chlorine, forming Na+ and Cl- ions that are attracted to each other to form an ionic bond.

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The principle of option D. Uniformitarianism states that the physical, chemical, and biological processes at work shaping the Earth today have also operated in the

Option D. Uniformitarianism is the principle stating that the physical, chemical, and biological processes at work shaping the Earth today have also operated in the geologic past. It is based on the idea that the present is the key to the past. In other words, the same natural laws that operate in the universe today have been operating since the beginning of time.

James Hutton was the first to propose this principle in the late 18th century. He suggested that the Earth was shaped by slow-acting geological forces such as erosion, sedimentation, and uplift over long periods of time. He believed that the same processes were still happening today and that they had operated in the past.

This principle is an important concept in geology because it allows scientists to interpret the Earth's history based on the processes that they observe today. By understanding how these processes work and how they have changed over time, scientists can reconstruct the history of the Earth and its environments.

Uniformitarianism has been tested and proven through many observations and experiments. For example, the study of sedimentary rocks has shown that they were formed in the past through the same processes that are observed today, such as deposition of sediment by water, wind, or ice.

Similarly, the study of volcanoes has shown that they are formed by the same processes as today, such as the movement of magma from deep within the Earth.

In conclusion, Uniformitarianism is the principle that allows us to interpret the Earth's history by observing the processes that shape it today. It is a fundamental concept in geology and has been tested and proven through many observations and experiments.

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Answer:

C. Glass

Explanation:

Amorphous solids have a non-crystalline structure and no order. In that case, Diamonds, Graphite, and Iron all have a crystalline structure and order. You are left with C as your answer.

The chemist has 642.4 millimoles of barium acetate in the solution.

To calculate the millimoles of barium acetate (Ba(C₂H₃O₂)₂) in the solution, we can use the formula:

moles = molarity × volume (in liters)

First, let's convert the volume from milliliters (mL) to liters (L):

440.0 mL ÷ 1000 = 0.440 L

Now we can substitute the given values into the formula:

moles = 1.46 M × 0.440 L

moles = 0.6424 mol (rounded to 4 decimal places)

To convert the moles to millimoles, we multiply by 1000:

millimoles = 0.6424 mol × 1000

millimoles = 642.4 mmol (rounded to 3 significant digits)

Therefore, the chemist has 642.4 millimoles of barium acetate in the solution.

It's important to note that the molarity (M) represents the number of moles of solute per liter of solution. By multiplying the molarity by the volume in liters, we can find the number of moles of solute. To convert moles to millimoles, we multiply by 1000. The result represents the millimoles of barium acetate present in the given volume of solution.

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Approximately 35.90 grams of ice must melt to lower the water temperature to 0.0°C.

To solve this problem, we need to calculate the amount of heat that needs to be transferred from the water to the ice in order to lower the water temperature to 0.0°C.

First, let's calculate the initial heat content of the water. The specific heat capacity of water is 4.186 J/(g·K), and the mass of the water can be calculated using its density (1 g/mL) and volume (7.30 × 10^2 mL):

Mass of water = density × volume = 1 g/mL × 7.30 × 10^2 mL = 7.30 × 10^2 g

The initial heat content of the water can be calculated using the formula:

Heat content = mass × specific heat capacity × temperature change

Heat content = 7.30 × 10^2 g × 4.186 J/(g·K) × (25.0°C - 0.0°C) = 7.30 × 10^2 g × 4.186 J/(g·K) × 25.0°C

Next, we need to calculate the amount of heat that needs to be transferred from the water to the ice to lower the water temperature to 0.0°C. This heat transfer occurs during the melting of the ice.

The amount of heat required to melt the ice can be calculated using the formula:

Heat = mass of ice melted × latent heat of fusion

Let's assume that x grams of ice melts. The mass of the ice can be calculated using its density (0.92 g/mL) and volume (same as the volume of water):

Mass of ice = density × volume = 0.92 g/mL × 7.30 × 10^2 mL = 6.716 × 10^2 g

Heat = x g × 333.7 J/g

Now, we need to ensure that the heat transferred from the water to the ice is enough to lower the water temperature to 0.0°C. The heat transferred from the water to the ice is equal to the heat transferred from the water when its temperature drops to 0.0°C:

Heat content of water = Heat transferred to ice

7.30 × 10^2 g × 4.186 J/(g·K) × 25.0°C = x g × 333.7 J/g

Now, we can solve for x:

x = (7.30 × 10^2 g × 4.186 J/(g·K) × 25.0°C) / (333.7 J/g)

x ≈ 35.90 g

Therefore, approximately 35.90 grams of ice must melt to lower the water temperature to 0.0°C.

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Water is known as the universal solvent because it can dissolve almost all ionic compounds due to its polarity that is having partially charged ends.

A polar compound is having the partially charged ends, where the shared pair of electrons are attracted  towards the more electronegative atom, and thus have partial charges on both atoms.

In water, the shared pair of electrons are pulled towards the electronegative oxygen atom and thus O acquires a negative charge and H gets a positive charge. These charged ends are active to attack other reagents and forms hydrogen bonds with other electronegative atoms of ionic bond.

In this way water bonds to the ionic compounds and gets them easily dissolved.  Hence, option C i.e., have partially charged end is correct.

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Δ'∘ for the reaction is approximately -1.1 kJ/mol.

Δ for the reaction is approximately -1.69 kJ/mol.

The initial concentrations of reactant and product being 1 M is not consistent with the conditions at which Δ'∘ is measured, as the concentrations used for the calculation are different (1.2 M and 0.65 M).

To determine the values of Δ'∘ and Δ for the given interconversion reaction, we need to use the equation:

Δ'∘ = -RT ln(K'eq)

Where:

Δ'∘ is the standard Gibbs free energy change for the reaction at 25 °C,

R is the gas constant (8.314 J/(mol·K)),

T is the temperature in Kelvin,

ln represents the natural logarithm,

K'eq is the equilibrium constant at the given temperature.

Given that K'eq is 1.97, we can calculate Δ'∘ as follows:

Δ'∘ = -(8.314 J/(mol·K))(298 K) ln(1.97)

Δ'∘ ≈ -1.1 kJ/mol

Therefore, Δ'∘ for the reaction is approximately -1.1 kJ/mol.

To calculate Δ, the Gibbs free energy change under the given conditions with adjusted concentrations, we can use the equation:

Δ = Δ'∘ + RT ln(Q)

Where:

Δ is the Gibbs free energy change,

Δ'∘ is the standard Gibbs free energy change (previously calculated),

R is the gas constant (8.314 J/(mol·K)),

T is the temperature in Kelvin,

ln represents the natural logarithm,

Q is the reaction quotient.

Given the concentrations of fructose 6-phosphate (1.2 M) and glucose 6-phosphate (0.65 M), the reaction quotient (Q) is:

Q = ([glucose 6-phosphate]^n)/([fructose 6-phosphate]^m)

Q = (0.65 M)^1 / (1.2 M)^1

Q ≈ 0.54

Now, we can calculate Δ using the equation:

Δ = -1.1 kJ/mol + (8.314 J/(mol·K))(298 K) ln(0.54)

Δ ≈ -1.1 kJ/mol - 0.59 kJ/mol

Δ ≈ -1.69 kJ/mol

Therefore, Δ for the reaction is approximately -1.69 kJ/mol.

Among the given statements, the ones that are consistent with the conditions at which Δ'∘ is measured are:

The temperature is 273 K.

The pH is 7.

The pressure is 101.3 kPa (1 atm).

The initial concentrations of reactant and product being 1 M is not consistent with the conditions at which Δ'∘ is measured, as the concentrations used for the calculation are different (1.2 M and 0.65 M).

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Each gram of hemoglobin carries approximately 3.015 milliliters of oxygen.

To calculate the number of milliliters of oxygen that each gram of hemoglobin carries, we can use the given information.

We know that 10.0 mL of blood can carry 2.01 mL of oxygen. So, we can set up a proportion:

(10.0 mL blood) / (2.01 mL oxygen) = (15 g hemoglobin) / (x mL oxygen)

Cross-multiplying, we get:

10.0 mL blood * x mL oxygen = 2.01 mL oxygen * 15 g hemoglobin

Simplifying, we have:

10.0x = 30.15

Dividing both sides by 10.0, we find:

x = 3.015 mL/g

Therefore, each gram of hemoglobin carries approximately 3.015 milliliters of oxygen.

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The volume of the glycerol sample is 36.4 mL.

To calculate the volume of a substance, we can use the formula:

Volume = Mass / Density.

Given that the mass of the glycerol sample is 43.7 g and the density is 1.20 g/mL, we can substitute these values into the formula:

Volume = Mass / Density

Volume = 43.7 g / 1.20 g/mL

Volume = 36.4 mL

In this calculation, we use the formula Volume = Mass / Density, where the mass is given in grams and the density is expressed in grams per milliliter. Dividing the mass by the density gives us the volume in milliliters, as density is defined as mass per unit volume.

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.ANSWER

STEP-BY-STEP EXPLANATION

From the question given, you were asked to name a compound

Cobalt (II) Bromide Heptahydrate

The heptahydrate in the compound means it has 7 molecules of water

Therefore, the chemical formula can be written below as

Answer:

covalent bonds

Explanation:

An atom's radius is well under 1 nanometer, or one billionth of a meter.

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