Introduction:
Define the following terms:
Chemical reaction, reactant, product, precipitate, Law of Conservation of Mass

Density =mass/volume

=6/3

=2

There are 5 atοms οf gοld (Au) are in a US Eagle gοld bulliοn cοin with a mass οf 31.3g Au.

A substance's tiniest cοmpοnent that cannοt be destrοyed chemically. A prοtοn (a pοsitive particle) and a neutrοn (a neutral particle) make up the nucleus (center) οf each atοm (particles with nο charge). The nucleus is filled with negative electrοns. Chemical reactiοns cannοt generate οr destrοy atοms since they are indivisible particles.

The amοunt οf matter in a bοdy is referred tο as its mass. The kilοgrams is the kilοgrams, which is the SI unit οf mass (kg). Mass is defined as: Mass = Density /Vοlume.

Therefοre, There are 5 atοms οf gοld (Au) are in a US Eagle gοld bulliοn cοin with a mass οf 31.3g Au.

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A change in water temperature is likely to have a negative effect on reproduction in both organisms that live near a freshwater ecosystem.

Since both organisms are adapted to the water temperature of their environment, and any increase or decrease in temperature can cause their reproductive processes to be disrupted. For example, an increase in water temperature can cause an increase in the metabolic rate of the organisms, leading to a decrease in the amount of energy available for reproduction.

Also, an increase in water temperature can cause an increase in water evaporation, leading to a decrease in the amount of water available for the organisms, which can also negatively affect their reproductive processes.

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Answer:

The oxygen atom in water is partially negative and the hydrogen atoms are partially positive. In ethanol, the oxygen atom is partially negative and the carbon and hydrogen atoms are partially positive.

In Question 4, Jasmine calculated the amount of energy absorbed by the water when the burning Cheeto was placed in it. Although the calculation related only to the water, we can still determine the amount of energy released by the burning Cheeto. This is because of the Law of Conservation of Energy, which states that energy cannot be created or destroyed, only transferred or transformed from one form to another. In this case, the energy released by the burning Cheeto is transferred to the water, causing its temperature to increase.

Therefore, we can use the amount of energy absorbed by the water (calculated in Question 4) as a measure of the amount of energy released by the burning Cheeto. We can assume that the energy released by the Cheeto is equal to the energy absorbed by the water. This is known as the principle of calorimetry, which states that the heat lost by the object being studied is equal to the heat gained by the surrounding medium.

However, it is important to note that this assumption is only valid if all the energy released by the Cheeto is transferred to the water. In reality, some energy may be lost to the surroundings, such as through radiation or conduction. Therefore, the calculated value for the energy released by the Cheeto may be slightly lower than the actual value.

The cost (in dollar) of running your 100 watt light bulb at the time per month is $ 14.4

First, we shall determine the energy consumed per month by the light bulb

E = Pt

E = 0.1 × 720

E = 72 KWh

Finally, we shall determine the cost of running the light bulb. Details below

Cost = energy × Cost per KWh

Cost of running per month = 72 × 0.2

Cost of running per month = $ 14.4

Thus, we can conclude that the cost of running per month is $ 14.4

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a) Mg3N2 is the limiting reactant.

b) H2O is the excess reactant.

c) 1.41 g of the excess reactant is left when the reaction stops

d) The percent yield of NH3 is 95.51%.

e) Total Theoretical yield of product is 11.17g.

What is  reaction?

A reaction is a process that involves a change in the arrangement of atoms, molecules, or ions to form new substances with different properties from the original substances.

a) First, we need to convert the masses of Mg3N2 and H2O to moles:

Moles of Mg3N2 = 7.3 g / (3 x 24.31 g/mol + 2 x 14.01 g/mol) = 0.0442 mol

Moles of H2O = 5.3 g / 18.02 g/mol = 0.294 mol

Next, we need to find out which reactant is limiting by comparing the number of moles of each reactant to the stoichiometric ratio:

Mg3N2 : H2O = 0.0442 mol : (0.294 mol/3) = 0.098 mol

The ratio of Mg3N2 to H2O is 1:3, so we need to divide the number of moles of H2O by 3.

Since the ratio of Mg3N2 to H2O is greater than 1:3, Mg3N2 is the limiting reactant.

b) H2O is the excess reactant.

c) from balanced that, chemical reaction it is clear

I mole of Mg3N2 react with 3 mole H2O

0:0722 mole of Mg 3 N₂ react with = 3x0-0722 =0.2166 mol of H20

mass of H2o reacted with Mg, N₂ = moles * molar mass

= 0.2166 x 18  = 3.89 g of H20

remaining Excess reagent after the reaction

⇒ 5.30 g -3.89g

= 1.41 g

d) from balanced chemical reaction it is clear that

I mole of Mg3N₂ produced = mole of NH3

0.0722 mole of Mg 3 N₂ produced =  2X0.0722 mole of NH3

= 0.144 mole of NH3

mass of NH3 produced = 0.144 x 17 = 2.45 g NH3

Theoretical yield = 2.45 g of NH3

Actual yield = 2.34g of NH3

Percent yield = actual yield/ Percent yield X 100

= 2.34/ 2.45 X 100 = 95.51%

e) From balanced chemical rxn it is clear that

I mole of Mg3 N₂ produced = 3 mole of MgO

0.0722 mole of Mg3 N₂ produced= 3x0.0722 mole of MgO

                                                          = 0.2166 mole of MgO

mass of MgO produced = 0.2166 x 40.36 8.72 g of MgO

                                        =8.72 g of MgO

Total Theoretical yield of product (MgO + NH3) in gram = 2.45+ 8.72  

=  11.17g

Therefore, Mg3N2 is the limiting reactant, H2O is the excess reactant, 1.41 g of the excess reactant is left when the reaction stops, The percent yield of NH3 is 95.51% and Total Theoretical yield of product is 11.17g.

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Ne, Ar, and Kr share properties and the number of electrons in their outermost energy level because they belong to the same group (noble gases). Therefore, option A is correct.

Any of a class of rare gases with high stability and very low reaction rates, such as helium, neon, argon, krypton, xenon, and occasionally radon. also known as the inert gas.

Noble gases are low chemically reactive, odorless, colorless, nonflammable, and monotonic gases. Noble gases are exceedingly stable and unlikely to form chemical connections since they have the minimal inclination to receive or lose electrons. Hence, option A is correct.

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80.0 liters of hydrogen gas at STP can produce 37.1 grams of ammonia.

To answer this question, we need to know the balanced chemical equation for the reaction between hydrogen and ammonia:

N2 + 3H2 → 2NH3

From this equation, we can see that 3 moles of hydrogen are required to produce 2 moles of ammonia.

Now, we need to convert 80.0 liters of hydrogen to moles. We can use the ideal gas law to do this:

PV = nRT

where;

Assuming standard temperature and pressure (STP), which is 0°C (273 K) and 1 atm, respectively, we can use the following values:

Plugging these values into the ideal gas law, we get:

n = PV/RT = (1 atm)(80.0 L)/(0.08206 L·atm/mol·K)(273 K)

n = 3.27 moles of H2

Now, we can use the stoichiometry of the balanced equation to determine the number of moles of NH3 produced:

3 moles of H2 produces 2 moles of NH3

Therefore, 3.27 moles of H2 produces:

(2 moles of NH3 / 3 moles of H2) x 3.27 moles of H2 = 2.18 moles of NH3

Finally, we can use the molar mass of NH3 to convert moles to grams:

2.18 moles of NH3 x 17.03 g/mol = 37.1 g of NH3

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Answer: 87690.67

Explanation: I don't even know if that's correct but i tried and i got close to that answer the i looked it up to see if i did it correctly and it rounded it up to that sooooooooo.........yeah.

Chalcopyrite's sole significant application is as a copper ore, yet the significance of this one use cannot be overstated. as a minor copper resource and as examples of minerals.

It is brassy to golden yellow in color and rates 3.5 to 4 on the Mohs scale for hardness. The streak clearly shows a greenish hue to it. Brass yellow with a potential for iridescent purplish tarnish. mainly the disphenoid, resembles a tetrahedron, is frequently large, and occasionally has a botryoidal shape.

Chalcopyrite is a copper and iron sulfide mineral that is the most prevalent copper mineral and a significant copper resource. In ore veins deposited at medium to high temperatures, such as those in Rio Tinto, it often occurs.

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Answer:

See explanation below

Explanation:

Sodium will react with chlorine to form sodium chloride NaCl.

Na is a group I metal with 1 valance electron to become one Na+ ion to bond with one Cl- ion

Magnesium will also react with chlorine to form magnesium chloride MgCl2

Mg is a group II metal with 2 valence electrons become one Mg2+ ion to bond with two Cl- ions.

Both Na and Mg are metals while Cl is non-metals so the bond between metal and non-metal is ionic bond.

Hope this helps.

Indeed, 2N + 2H results from n2 + 3H2.An oxidation reaction is a process that involves chemical addition of oxygen, and a reduction reaction is a process that involves a removal of oxygen.

Redox reactions are those in which there is a change in the oxidation number, with both a gain and a drop in number.The reaction called non-redox if this fails to take place.

You must figure out each atom's oxidation values prior to and following the reaction in order to identify what happens toward which elements inside a redox reaction.The prospective charge of the an atom in its cationic state is represented by oxidation numbers.In a reaction, an atom is reduced if its oxidation number falls.

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The mass of water in kg must evaporate in order for the person's body temperature to remain constant is 0.0243 kg.

Internal energy, which emerges from the molecular state of motion of matter, is an energy form inherent in all systems. Internal energy is represented by the symbol U, and the unit of measurement is the joule (J).

Let mass of the body be x

We have,

enthalpy = 44.016 kj mol-1

Temperature be 298 K

As ideal gas,

Δ = 44.016 - x/18 x 8.314 x 10⁻³ x 298 K

40.66 = 44.016 - x/18

-3.356 x 10³/8.314 x 298 = x/18

-1.35 = x/18

x = 24.3 g

So the amount of water be 0.0243 kg.

Internal energy increases when temperature rises and states or phases transition from solid to liquid and liquid to gas. Planetary bodies can be viewed as hybrids of heat reservoirs and heat engines. Internal energy E is stored in the heat reservoirs, and heat engines transform some of this thermal energy into mechanical, electrical, and chemical energies.

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Explanation:

OK thank you so much I hope you are well

The mass of baking soda required for a reaction is measured in grammes.

The metric system uses the gramme and kilogramme as its two primary units for measuring mass. Using the common metric prefixes, we can derive the remaining metric units from the gramme. A paper clip weighs roughly one gramme.

Using balancing scales is one method of determining an object's mass. Place the item you want to weigh on one side of a balance scale, then add gramme masses to the opposite side until the scales are level. Typically, masses for weighing come in 1 g and 5 g units.

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Pressure is independent variable and volume is dependent variable. During the investigation, the temperature and quantity of gas are kept constant.

Boyle's law, also known as the Boyle-Mariotte law or Mariotte's law, seems to be an observational gas law that specifies the connection between confined gas pressure and volume.

If the temperature as well as quantity of gas stay constant within a closed system, the absolute pressure applied by a constant amount of an ideal gas seems to be inversely correlated with the volume it fills. Pressure is independent variable and volume is dependent variable.

Therefore, pressure is independent variable and volume is dependent variable. During the investigation, the temperature and quantity of gas are kept constant.

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The volume of the solution is 1.20 liters.

Volume is a measure of the amount of space that an object occupies. It is typically measured in cubic units such as cubic meters (m³), cubic centimeters (cm³), or cubic feet (ft³).

The volume of an object can be calculated by multiplying its length, width, and height or by using other formulas specific to the shape of the object.

To calculate the volume of a solution, we need to use the formula:

volume (in liters) = amount of solute (in moles) / concentration (in moles per liter)

In this case, we have:

Amount of solute = 0.55 moles

Concentration = 0.46 Molar

Using the formula above, we can calculate the volume of the solution as follows:

volume = 0.55 moles / 0.46 M = 1.20 L

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The answer for this question would be pH=3.0

Hope this helps :)

pH of HCl solution is 4.

pH may be defined as a measure of free acidity.

More precisely, pH is defined as the negative log of the hydrogen ion concentration.

                                                      pH = - log [H⁺]

The range of pH extends from zero to 14.

A pH value of 7 is neutral, because pure water has a pH value of exactly 7. Values lower than 7 are acidic; values greater than 7 are basic or alkaline.

Given,

Moles of HCl = 10⁻⁴

We know that, pH = - log [H⁺]

                         pH = - log (10⁻⁴)

                            pH = 4

Therefore, H⁺ concentration in a solution with a pH of 3.75 is 1.7 × 10⁻⁴

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According to IUPAC nomenclature, the longest chain of this compound contains 7 carbons. Hence, the name of this compound is 4 -propyl-5-ethyl-5-phenyl heptane.

IUPAC rules are used to name the organic compounds. As per this rule, the compound is named based on the chain containing highest number of carbon atoms. The substituents are named with their prefix or suffix.

For the given compound, the longest chain contains 7 carbon atoms. Hence, the chain is named as heptane. The substituents are numbered in such a way that, they have the least possible number.

The 4th carbon contains a propyl group and a phenyl group and ethyl groups are attached on the 5th position in the longest chain. Therefore, the name of the compound is  4 -propyl-5-ethyl-5-phenyl heptane.  

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If Jake have type 1 diabetes then he needs insulin cells because his body cannot make insulin protein.

What is diabetes?

Diabetes is a chronic, metabolic disease characterized by elevated levels of blood glucose (or blood sugar), which leads over time to serious damage to the heart, blood vessels, eyes, kidneys and nerves.

The most common diabetes symptoms experienced by many people with diabetes are increased thirst, increased urination, feeling tired and losing weight. In Type 1 diabetes, body cannot make insulin whereas in type 2 diabetes, body can make insulin but can't use it properly.

Therefore, if Jake have type 1 diabetes then he needs insulin cells because his body cannot make insulin protein.

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The concentration of K2CO3 (Potassium carbonate) in the solution is 0.000235 M.

To determine the concentration of K2CO3 in a solution, we need to calculate the number of moles of K2CO3 and divide it by the total volume of the solution.

First, let's calculate the number of moles of K2CO3:

molar mass of K2CO3 = 2(39.1 g/mol) + 12.0 g/mol + 3(16.0 g/mol) = 138.2 g/mol

moles of K2CO3 = 17.8 g / 138.2 g/mol = 0.1287 mol

Next, let's calculate the total volume of the solution:

total mass of solution = 546 g

Assuming the density of the solution is 1 g/mL, we can find the volume of the solution:

volume of solution = 546 mL

Finally, we can calculate the concentration of K2CO3:

concentration of K2CO3 = moles of K2CO3 / volume of solution

= 0.1287 mol / 546 mL

= 0.000235 M

Therefore, the concentration of K2CO3 in the solution is 0.000235 M.

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Normal Concentration = 18.09 moles/L Standard Deviation = 1.89 moles/L

The capacity for sustained attention on a single thing, activity, or work without being sidetracked is known as concentration. It is the key to success in most endeavors, as it requires a person to ignore any extraneous thoughts, feelings, or stimuli and instead focus on the task at hand. Concentration is a mental skill that can be developed and improved with practice, such as with mindfulness, meditation, and various cognitive exercises. Concentration can also be adversely affected by poor physical health, lack of sleep, and stress, so it is important to maintain a healthy lifestyle if one wants to stay focused.
Student | Weight (g) | Volume (L) | Concentration (moles/L)
1 | 5.0 | 0.25 | 19.82
2 | 8.0 | 0.50 | 15.89
3 | 4.0 | 0.20 | 20.23
4 | 7.0 | 0.30 | 18.52
5 | 6.0 | 0.40 | 16.96

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Explanation:

The symbol P represents the element phosphorus, which has an atomic number of 15, indicating that it has 15 protons in the nucleus. The ion is negatively charged with a 3- charge, which means it has three more electrons than protons.

To find the number of neutrons in an atom or ion, you need to know its mass number, which is the sum of protons and neutrons. Since the charge of the ion is not related to its mass, we can assume that the mass number is the same as that of the neutral phosphorus atom, which is approximately 31.

So, the number of protons, neutrons, and electrons in the P3- ion is:

Protons: 15

Neutrons: 31 - 15 = 16

Electrons: 15 + 3 = 18

Therefore, the P3- ion has 15 protons, 16 neutrons, and 18 electrons.

Answer:

The silicates, owing to their abundance on Earth, constitute the most important mineral class. Approximately 25 percent of all known minerals and 40 percent of the most common ones are silicates; the igneous rocks that make up more than 90 percent of Earth's crust are composed of virtually all silicates. The vast majority of the minerals that make up the rocks of Earth's crust are silicate minerals. These include minerals such as quartz, feldspar, mica, amphibole, pyroxene, olivine, and a great variety of clay minerals.

Explanation:

Answer:

Answer:

Calcium chloride is used in medication to help treat people who have low levels of calcium in their body. It helps supplement the necessary amount of calcium needed for healthy functioning.

Explanation:

The amount of the propane can be obtained from the mass and the mass of the propane.

To calculate the amount of propane gas in moles, you need to know the mass of propane gas and its molar mass. The molar mass of propane (C3H8) is approximately 44.1 g/mol.

Once you know the mass of the propane gas, you can use the following formula:

moles = mass (in grams) / molar mass (in grams per mole)

For example, let's say you have 88.2 g of propane gas:

moles = 88.2 g / 44.1 g/mol

moles = 2.0 mol

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The energy transferred was 4,233.6 joules and the average temperature of the mixture was 50°C.

Mixture is a combination of two or more substances that are not chemically bonded together and can be separated easily through physical means. The components of a mixture might be solids, liquid, or gases. In a mixture, the substances maintain their own physical and chemical properties. Examples of mixtures include air, water, salad dressing, and trail mix. Both homogeneous and heterogeneous mixtures exist.
Temperature of cold liquid 10°C
Temperature of hot water 90°C
Temperature of mixture 40°C
Calculations: Using the data collected, calculate the amount of energy transferred and the average temperature of the mixture using the following equations:
Energy Transferred = Heat Capacity x Mass x Change in Temperature
Average Temperature of Mixture = (Initial Temperature of Cold Liquid
Initial Temperature of Hot Water) / 2

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