The compound MgSO4 , Epsom salt, is used to soothe sore feet and muscles. How many grams will you need to prepare a bath containing 6.20 moles of Epsom salt?

Answer:

Neon is the tenth element with a total of 10 electrons. In writing the electron configuration for neon the first two electrons will go in the 1s orbital. Since 1s can only hold two electrons the next 2 electrons for Ne go in the 2s orbital. The remaining six electrons will go in the 2p orbital.

Explanation:

In step one of the cycle, acetyl CoA, combines with a four-carbon acceptor molecule, oxaloacetate, to shape a six-carbon molecule referred to as citrate.

Citrate synthase is step one withinside the TCA cycle, it's far tremendously thermodynamically favorable, and as a result regulated. It is the charge restricting step withinside the cycle, and as a result its hobby determines the charge of the TCA cycle. In the TCA cycle the methyl carbon of pyruvate turns into one of the chemically indistinguishably carbons withinside the center of succinate. Thus the 2 center carbons of OAA can be similarly labeled.

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Answer:

The speed of molecules in a gas is directly proportional to the square root of the temperature and inversely proportional to the square root of the molar mass.

Since both gases are at the same temperature, we only need to compare their molar masses.

The molar mass of carbon dioxide (CO2) is 44 g/mol and the molar mass of hydrogen (H2) is 2 g/mol.

Therefore, the square root of the molar mass of hydrogen is smaller than the square root of the molar mass of carbon dioxide.

This means that the speed of hydrogen molecules is greater than the speed of carbon dioxide molecules at the same temperature.

When the equilibrium constant is higher than one, it indicates that the reaction prefers to produce products, whereas if the equilibrium constant is less than one, it indicates that the reaction prefers to produce reactants. If the equilibrium constant is equal to one, the reaction proceeds in both directions equally.

In a chemical reaction, exothermic reactions are defined as reactions that release heat into their environment. It implies that heat is given off when reactants are converted to products. At equilibrium, an exothermic reaction continues to be exothermic, meaning that heat is given off even after the reaction reaches a state of equilibrium.There are two types of reactions: exothermic and endothermic.

A reaction is classified as exothermic if it releases heat, and endothermic if it absorbs heat. The direction of the reaction is determined by whether it is exothermic or endothermic. At equilibrium, the reaction is no longer moving forwards or backwards. It's also worth noting that reactions can be exothermic in one direction and endothermic in the other.

The equilibrium constant (K) is defined as the ratio of the concentration of products to the concentration of reactants in the chemical reaction equation. It is used to express how much of the products is generated by the reaction in comparison to the reactants.  the equilibrium constant aids in the identification of the direction in which the reaction will proceed at equilibrium.

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Burning biomass results in the production of nitrogen oxides, carbon monoxide, and carbon dioxide, as well as other pollutants and particulates.

Wood is the substance that is most frequently taken from trees and used as fuel. Burning wood produces carbon dioxide as a byproduct. One of the earliest techniques for producing energy is the consumption of wood, which has been used as a wellspring of intensity and light for a long time.

Wood sends carbon dioxide into the climate alongside energy. Considering that carbon dioxide is an ozone-depleting substance that traps heat in the air, it is an essential driver of environmental change when the wood is scorched.

Trees likewise produce extra side effects including debris, smoke, and water fume.

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The growth of the new plant depicts the asexual reproduction characteristic. The characteristic that describes the growth of the new plant in Stephan's mother cutting a twig from a rose bush and planting it in the soil is asexual reproduction.

Asexual reproduction is the mode of reproduction by which organisms generate offspring that are identical to the parent's without the fusion of gametes. Asexual reproduction is a type of reproduction in which the offspring is produced from a single parent.

The offspring created are clones of the parent plant, meaning they are identical to the parent.The new plant in Stephan’s mother cutting a twig from a rose bush and planting it in the soil depicts the process of asexual reproduction, which is the ability of a plant to reproduce without seeds. In asexual reproduction, plants can reproduce vegetatively by cloning themselves using their roots, bulbs, or stems.

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Answer:

45.5

Explanation:

your question is not clear at all

your question has no unit for volume

2.5 moles of BaCl2 can produce 5 moles of NaCl.

Chemical equation is the symbolic representation of a chemical reaction in the form of symbols and chemical formulas.

The balanced chemical equation for the reaction between barium chloride (BaCl2) and sodium sulfate (Na2SO4) is:

BaCl2 + Na2SO4 → 2 NaCl + BaSO4

From this equation, we can see that for every 1 mole of BaCl2, 2 moles of NaCl are produced.

Therefore, to calculate how many moles of NaCl can be produced from 2.5 moles of BaCl2, we can use the following proportion:

1 mole BaCl2 : 2 moles NaCl = 2.5 moles BaCl2 : x moles NaCl

Where

Solving for x, we get:

x = 2.5 moles BaCl2 × (2 moles NaCl / 1 mole BaCl2)

x = 5 moles NaCl

Therefore, 2.5 moles of BaCl2 can produce 5 moles of NaCl.

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The pOH of the 0.001 M NaOH solution is approximately 3.

To determine the pOH of a solution, we need to know the concentration of hydroxide ions (OH-) in the solution.

In the case of a 0.001 M NaOH solution, we can assume that all of the NaOH dissociates completely in water to form Na+ and OH- ions. Therefore, the concentration of hydroxide ions in the solution is also 0.001 M.

The pOH is calculated using the equation:

pOH = -log[OH-]

Substituting the concentration of hydroxide ions, we have:

pOH = -log(0.001)

Using a calculator, we can evaluate the logarithm:

pOH ≈ 3

Therefore, the pOH of the 0.001 M NaOH solution is approximately 3.

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Answer:

The formula for sucrose is

C12H22O11

moles sucrose = mass / molar mass  

= 6.0 g / 342.30 g/mol

= 0.017528 mol

the formula shows that each sucrose molecule has 22 H atoms

so moles H = 22 x moles sucrose

= 0.3856 mol

mass H = molar mass x moles

= 1.008 g/mol x 0.3856 mol

= 0.3887 g

= 0.39 g ( 2 sig figs)

Answer:

near an open flame

Explanation:

if your hair is not tied back near open flames in combination with most hair care products it would turn you into a living torch

Long, unrestrained hair is most likely to be a safety concern near an open flame in the laboratory and the correct option is option 1.

The open flame poses a direct risk of igniting loose hair, potentially causing burns or fires. In a laboratory setting, there are often various sources of open flames, such as Bunsen burners, gas stoves, or torches.

The heat and proximity of these flames increase the likelihood of hair coming into contact and catching fire. To prevent accidents, it is essential to follow proper safety protocols and secure long hair by tying it back or using hair restraints when working in areas with open flames. This precaution helps minimize the risk of personal injury and maintains a safe working environment.

Thus, the ideal selection is option 1.

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Answer:

One difference between Group 7 of the modern periodic table and Group 7 in Mendeleev's periodic table is the placement of the elements.

In Mendeleev's periodic table, Group 7 consisted of manganese (Mn), technetium (Tc), and rhenium (Re). In the modern periodic table, Group 7 consists of the halogens: fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At).

The halogens are a group of highly reactive nonmetals, while the elements in Group 7 of Mendeleev's periodic table were not all nonmetals and did not share the same chemical properties as the halogens.

Hope this helps!

The word "symptom" refers to a specific manifestation or indication of a condition, disease, or disorder that is experienced or observed by an individual.

Symptoms are subjective or objective changes in the body's normal functioning that may be recognized as abnormal, uncomfortable, or problematic. Symptoms can manifest in various ways depending on the nature of the underlying condition. They can be physical, such as pain, rash, cough, fever, or fatigue, indicating an illness or injury affecting the body. Symptoms can also be psychological, such as anxiety, depression, or confusion, reflecting disturbances in mental health.

Symptoms serve as important clues for medical professionals to identify and diagnose diseases or disorders. They provide valuable information about the nature, severity, and progression of an illness, helping healthcare providers formulate appropriate treatment plans. Additionally, symptoms may also be important for individuals to self-assess their own health status and seek appropriate medical attention.

It is essential to note that symptoms alone may not provide a definitive diagnosis, as they can overlap across different conditions. Further evaluation, including medical tests and examinations, is often necessary to confirm a diagnosis and determine the appropriate course of action.

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Answer:

This question is incomplete

Explanation:

This question is incomplete, however, there are some basic things that be used to answer the completed question on your own. Flame test is a test that is used to identify metal ions in a compound. Although, not all metal ions produce a colour in a flame test.

In a flame test, a "clean wire loop" is dipped in an unknown solid/mixture of solids, the loop where the solids must have attached to is then placed in the tip of a blue flame (perhaps of a bunsen burner). A colour change/changes is then observed during the course of this process. Some popular metal ions and there colour in flame test are listed below

Lithium ion ⇒ red

Sodium ion ⇒ yellow

Potassium ion ⇒ lilac

Calcium ion ⇒ orange-red

Barium ion ⇒ pale-green

Copper ion ⇒ blue-green

rubidium ion ⇒ red-violet

Lead ion ⇒ gray white

The number of different colours observed will ultimately determine the number of elements exposed to the flame

B. 45.0 L.The balloon has a 45.0 L volume shortly before it bursts.

When temperature is held constant, a gas's volume and pressure have an inverse relationship. This implies that the volume increases as the pressure falls.

Using the Ideal Gas Law, we can calculate the change in volume with the following equation:

\(\frac{V2}{T2} = \frac{V1}{T1}\)

where T1 denotes the starting temperature, T2 denotes the finished temperature, V1 denotes the starting volume, and V2 is the finished volume.

Given:

V1 = 7.2 L

T1 = 27℃ = 300 K

T2 = -32℃ = 241 K

We can solve for V2:

\(V2 = \frac{(V1 * T2) }{ T1} \\\)

\(V2 =\frac{ (7.2 L * 241 K) }{ 300 K }\\V2 = 45.0 L\)

Therefore, the volume of the balloon just before it bursts is 45.0 L.

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Answer:

Explanation:

Base your answer to the question on the information below and on your knowledge of chemistry. At 1023 K and 1 atm, a 3.00-gram sample of SnO2(s) (gram formula mass = 151 g/mol) reacts with hydrogen gas to produce tin and water, as shown in the balanced equation below. SnO2(s) + 2H2(g) → Sn(L) + 2H2O(g) Show a numerical setup for calculating the number of moles of SnO2(s) in the 3.00-gram sample.

The term mole concept is used here to determine the number of moles of SnO₂ present in 3.00 gram sample. The number of moles present is 0.0199.

One mole of a substance is defined as that quantity of it which contains as many entities as there are atoms exactly in 12 g of carbon - 12. The formula used to calculate the number of moles is:

Number of moles = Given mass / Molar mass

Mathematically, n = m / M

One mole is defined as a number which is equal to 6.022 × 10²³ particles, also known as Avogadro's constant.

Here the molar mass of SnO₂ = 150.71 g/mol

Mass of SnO₂ = 3.00 g

Then the number of moles = 3.00 g / 150.71 g/mol = 0.0199

Thus the number of moles is 0.0199.

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The number of faradays that passes through a resistance in a circuit carrying current of 5 A for 1hour is 0.187 Faraday.

The number of Faradays passing through an electrical circuit can be calculated using the following formula;

Q = It

Where:

According to this question, a circuit of electricity is carrying a current of 5A for 1 hour (3600s). The charge can be calculated as follows:

Q = 5 × 3600

Q = 18,000C

Since [1 F = 96500 C]

18,000C will be equivalent to 0.187 Faradays.

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Answer:

\(\boxed {\boxed {\sf 3.7 * 10^{22} \ molecules \ NaCl}}\)

Explanation:

We are asked to find how many molecules are in 3.6 grams of sodium chloride.

First, we convert grams to moles using the molar mass. These values are equivalent to atomic masses on the Periodic Table, but the units are grams per moles instead of atomic mass units. Look up the molar masses of the individual elements: sodium and chlorine.

There are no subscripts in the chemical formula (NaCl), so we simply add the 2 molar masses.

Now we will convert using dimensional analysis. First, set up a ratio using the molar mass.

\(\frac {58.4397693 \ g \ NaCl}{ 1 \ mol \ NaCl}\)

We are converting 3.6 grams to moles, so we must multiply the ratio by this value.

\(3.6 \ g \ NaCl *\frac {58.4397693 \ g \ NaCl}{ 1 \ mol \ NaCl}\)

Flip the ratio so the units of grams of sodium chloride cancel.

\(3.6 \ g \ NaCl *\frac { 1 \ mol \ NaCl}{58.4397693 \ g \ NaCl}\)

\(3.6 *\frac { 1 \ mol \ NaCl}{58.4397693}\)

\(\frac { 3.6}{58.4397693} \ mol \ NaCl\)

\(0.06160188589 \ mol \ NaCl\)

Next, we convert moles to molecules using Avogadro's Number. This is 6.022 × 10²³ and it tells us the number of particles (atoms, molecules, formula units, etc). In this case, the particles are molecules of sodium chloride. Let's set up another ratio.

\(\frac {6.022 \times 10^{23} \ molecules \ NaCl}{ 1 \ mol \ NaCl}\)

Multiply by the number of moles we calculated.

\(0.06160188589 \ mol \ NaCl * \frac{6.022 \times 10^{23} \ molecules \ NaCl}{1 \ mol \ NaCl}\)

The units of moles of sodium chloride cancel.

\(0.06160188589 * \frac{6.022 \times 10^{23} \ molecules \ NaCl}{1 }\)

\(3.70966557*10^{22} \ molecules \ NaCl\)

The original measurement of grams (3.6) has 2 significant figures, so our answer must have the same. For the number we found, that is the tenths place. The 0 in the hundredth place tells us to leave the 7 in the tenth place.

\(3.7 * 10^{22} \ molecules \ NaCl\)

There are \(3.7 * 10^{22} \ molecules \ NaCl\) in 3.6 grams and the correct answer is choice D.

Tthe initial temperature of the polystyrene sample is 39.4°C.

Given: Mass of polystyrene sample = 54.2 gSpecific heat of polystyrene = 1.880 J-g°CWater mass = 100.0 g Initial water temperature = 21.0°CWater final temperature = 34.3°CPressure remains constant at 1 atmFormula used:Heat gained by water = heat lost by polystyreneHence,Heat lost by polystyrene = Heat gained by water=> mcΔT = mcΔTwhere,m = mass of polystyrene or waterc = specific heat capacityΔT = change in temperatureThe temperature change is ΔT = 34.3°C - 21.0°C = 13.3°CNow we can use this temperature change to calculate the initial temperature of the polystyrene.Taking the water's specific heat capacity, c = 4.184 J/g°CHeat gained by water = (100.0 g)(4.184 J/g°C)(13.3°C) = 5574 JHeat lost by polystyrene = 5574 JTaking the polystyrene's specific heat capacity, c = 1.880 J/g° ) = 13.3°C Now let's calculate the mass of polystyrene using the specific heat capacity formula.5574 J = (54.2 g)(1.880 J/g°C)(13.3°C - Ti)Ti = 39.4°C

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The instrument to measure volume in the laboratory here is a graduated cylinder and volumes include, for example, 68 ml (1), 32,5 ml (2), 82 ml (3), etc.

A graduated cylinder is an instrument used in laboratories to measure the volume of a given solution, which is generally expressed as millimeter units (ml).

In this case, the millimeters can exactly determine the volume of liquid that will be used during the formulation of the solution.

In conclusion, the instrument to measure volume in the laboratory here is a graduated cylinder and volumes include, for example, 68 ml (1), 32,5 ml (2), 82 ml (3), etc.

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Answer:

Reduction involves a half-reaction in which a chemical species decreases its oxidation number, usually by gaining electrons. The other half of the reaction involves oxidation, in which electrons are lost. Together, reduction and oxidation form redox reactions (reduction-oxidation = redox).

Explanation:

Hope this helps :)

The empirical formula of the compound with 14.3% Nitrogen, 4.1% Hydrogen, and 81.6% Bromine would be \(NH_4Br\).

The compound contains 3 atoms of different elements according to the following percentage:

Let's find the mole equivalent of each percentage:

Divide by the smallest mole:

Thus, the empirical formula of the compound is \(NH_4Br\).

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Answer:

Magnesium Mg 12  12

Phosphorous P 15  15

Flourine F 9  9

Iron Fe 26  26

Calcium Ca 20  20

Flourine F  9 9

Explanation:

Answer:

Magnesium Mg 12  12

Phosphorous P 15  15

Fluorine F 9  9

Iron Fe 26  26

Calcium Ca 20  20

Fluorine F  9 9

Answer:

fishery

An area with a large population of valuable ocean organisms is called a fishery. If it was correct mark me as brainiest

Answer:

74.3kJ are transeferred

Explanation:

In the bomb calorimeter, the burning of C₈H₁₈ is producing heat that is been absorbed for the calorimeter and the water.

Heat absorbed calorimeter:

837J/°C * (33.8°C-15.0°C) = 15735.6J

Heat absorbed water:

C*m*ΔT

C specific heat of water (4.184J/g°C), m is mass of water (745g), and ΔT change in temperature (33.8°C - 15°C = 18.8°C)

4.184J/g°C*745g*18.8°C = 58601.1J

Heat released by the reaction:

15735.6J + 58601.1J = 74336.7J

Answer:

D. Ultraviolet light should have a short wavelength, not a long wavelength.

Explanation:

just took the quiz on Ed

The mistake Gino made is, ultraviolet light should have a short wavelength, not a long wavelength.

Electromagnetic spectrum is the arrangement of electromagnetic radiations in the order of increasing frequency or decreasing wavelength.

Examples electromagnetic radiations based on increasing wavelength  include;

Thus, the mistake Gino made is, ultraviolet light should have a short wavelength, not a long wavelength.

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Answer:

A mixture of 3 moles of N2, 5 moles of CO2, and 10moles of Cl2 exert a total pressure of 1120 mmHg. What is the partial pressure of CO2?

Explanation:

According to Dalton's law of partial pressures:

The partial pressure of a gas can be determined by using the formula:

\(the partial pressure of a gas = mole fraction of the gas * total pressure\)

Partial pressure of CO2:

\(partial pressure of CO2= total pressure * mole fraction of CO2\\\\Mole fraction of CO2=\frac{number of moles of CO2}{total number of moles of all the gases} \\mole fraction of CO2=\frac{5mol}{3mol+5mol+10mol} = 5/18\\Partial pressure of CO2=\frac{5}{18} * 1120mmHg\\ =311.1mmHg\)

Hence, the partial pressure of CO2 is 311.1mmHg.

Molecular Mass of Compound.

\(\\ \sf\longmapsto Ba_3(PO_4)_2\)

\(\\ \sf\longmapsto 3(137u)+2(39u+4(16u))\)

\(\\ \sf\longmapsto 411u+2(39u+64u)\)

\(\\ \sf\longmapsto 411u+2(103u)\)

\(\\ \sf\longmapsto 411u+206u\)

\(\\ \sf\longmapsto 617u\)

\(\\ \sf\longmapsto Mass\%\:of\:O\)

\(\\ \sf\longmapsto \dfrac{64}{617}\times 100\)

\(\\ \sf\longmapsto \dfrac{6400}{617}\)

\(\\ \sf\longmapsto 10.3\%\)