Determine the mass of water (in kg) if 43,120 cal of energy is placed into water, resulting in a temperature change from 105 degrees celsius from 87.1 degrees celsius

Ballistics is a branch of forensic science that studies weapons and bullets. Ballistics is the study of the marks made by a firearm on a bullet as it shoots, the angle of trajectory of the projectile, and the type and quantity of damage the bullet causes when it strikes an object.

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Answer:

Terbium

Explanation:

Answer:

1counterforces

2device

3wires

4switch

We need 10.7 g of KClO3 to produce 6.5 g of KCl. Protons and neutrons have approximately the same mass, which is about 1 amu, so the atomic mass of an element is roughly the sum of the number of protons and neutrons in its nucleus.

What is Atomic Mass?

Atomic mass is the mass of an atom of a chemical element. It is usually expressed in atomic mass units (amu) or in grams per mole (g/mol). The atomic mass of an element is determined by the number of protons and neutrons in the nucleus of an atom.

The balanced chemical equation for the reaction of KClO3 producing KCl is:

2KClO3 → 2KCl + 3O2

We can see from the equation that 2 moles of KClO3 produce 2 moles of KCl. We need to calculate how many moles of KCl are produced from 6.5g of KCl, and then use the mole ratio to find the amount of KClO3 needed.

First, we need to convert the mass of KCl to moles:

moles of KCl = mass of KCl / molar mass of KCl

= 6.5g / 74.55 g/mol

= 0.0872 mol

From the balanced equation, we know that 2 moles of KClO3 produce 2 moles of KCl. Therefore, to find the moles of KClO3 needed to produce 0.0872 mol of KCl, we can use the following proportion:

2 mol KClO3 / 2 mol KCl = x mol KClO3 / 0.0872 mol KCl

Solving for x, we get:

x = 0.0872 mol KClO3 x (2 mol KClO3 / 2 mol KCl)

= 0.0872 mol KClO3

Finally, we can convert the moles of KClO3 to grams using its molar mass:

mass of KClO3 = moles of KClO3 x molar mass of KClO3

= 0.0872 mol x 122.55 g/mol

= 10.7 g

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Answer:

The nucleus contains two types of subatomic particles, protons and neutrons. The protons have a positive electrical charge and the neutrons have no electrical charge. A third type of subatomic particle, electrons, move around the nucleus. The electrons have a negative electrical charge.

The statements that accurately describe the rock cycle are:

Rocks change from one type to another in a definite order.

Rocks change slowly over time.

What is Rock Cycle?

It illustrates how the three major types of rocks—igneous, sedimentary, and metamorphic—can be transformed from one type to another over time through various geological processes such as weathering, erosion, sedimentation, and metamorphism. The rock cycle is driven by the continuous movement of the Earth's crust and the interactions between the different components of the Earth system, such as the atmosphere, hydrosphere, and biosphere.

The rock cycle is a natural process that describes how rocks transform from one type to another over time through a series of geological processes. It is a continuous process and there is no set starting or ending point. The rock cycle is driven by various factors including heat, pressure, weathering, erosion, and geological activity.

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Answer:

A C D

Explanation:

By using stratigraphy, which makes the assumption that the oldest layer is at the bottom and the youngest layer is at the top, this is accomplished.

The strata are arranged chronologically as follows: Cambrian, Ordovician, Silurian, Devonian, Carboniferous (Mississippi and Pennsylvanian), Permian, Triassic, Jurassic, Cretaceous, Tertiary, and Quaternary. Sedimentary rock is the sort of rock where fossils are most likely to form.

Sediment builds up throughout time, resulting in the formation of sedimentary rocks. The oldest layer of rock is the lowest layer since it forms first. The youngest layer is the one on top, and each layer underneath that is younger.

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It's never a good idea to use your credit card when experiencing strong emotions, especially if you tend to steer toward 'retail therapy.

Answer:

Sodium Chloride has Ionic bond while Hydrogen Chloride has covalent bond.

Explanation:

Na has 11 electrons (2, 8, 1) and need to give away 1 electron to be stable

Cl has 17 electrons ( 2, 8, 7) and needs 1 electron to be stable.

Na transfers 1 electron to CL to form Ionic bond.

While

Hydrogen has 1 electron and shares with Chlorine to be stable.

Covalent bond involves sharing.

Chlorine reacts with sodium to form ionic sodium chloride while chlorine reacts with hydrogen to form covalent hydrogen chloride.

The nature of bonding between atoms depends on their relative difference in electronegativity.

Chemical bonding is the process by which atoms come together to form compounds.

There are different kinds of chemical bonds;

An ionic bond is formed when there is high electronegativity difference between the bonding atoms. Typically, this type of bond is formed when the electronegativity difference is about 2.0 and above.

For a covalent bond, an electronegativity difference of about 0.4 - 1.7 is considered a polar covalent bond. Lower values of electronegativity difference corresponds to a nonpolar bond.

The electronegativity difference between sodium and chlorine is about 2.23. This corresponds to a pure ionic bond. The compound is composed of chlorine and sodium ion pairs alternately located in a crystal lattice as shown in the image attached.

The  electronegativity difference between chlorine and hydrogen is about 0.96. This corresponds to a polar covalent bond. The negative end of the dipole points towards chlorine while the positive end of the dipole points towards hydrogen.

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The "Ring of Responsibility" requires a 15- to 25-foot untreated buffer zone next to water bodies.

A buffer zone is an area of land that separates two or more countries, states, or territories, and is often demilitarized. The purpose of a buffer zone is to provide a space for negotiations and to reduce the possibility of conflict and war. Buffer zones can also be used to protect sensitive natural resources or habitats, such as areas of wilderness or wildlife. Buffer zones can be permanent or temporary, and can range in size from a few miles to hundreds of miles. In addition to physical barriers, buffer zones can also include economic, political, and social measures to reduce tensions between two or more parties. Buffer zones are an important tool in international relations, as they can help to prevent armed conflict and promote peaceful resolution of disputes.

This buffer zone is intended to prevent pollutants from entering the water body and protect it from potential environmental damage.

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Answer:

i think niether

Explanation:

ΔTf=−0.634°C

Explanation:

We're asked to find the freezing point depression of a solution.

To do this, we use the equation

ΔTf= i⋅m⋅Kf

where,

ΔTf is the change in freezing point temperature that we're trying to find.

i  is the Van't Hoff factor, which is given as 1 (and usually is 1 in the case of nonelectrolytes)

m is the molality of the solution, which is

molality = mol solute /kg solvent

Convert the given mass of sucrose to moles using its molar mass:

35.0g sucrose(1lmol sucrose342.30g sucrose)=0.102 mol sucrose

The molality is thus

molality=0.120lmol sucrose/0.3000lkg water=0.341m

K f is the molal freezing point constant for the solvent (water), which is given as −1.86°C/m

Plugging in known values, we have

ΔTf=(1)(0.341m)(−1.86l°C/m)

=−0.634l°C

This represents how much the freezing point decreases. The new freezing point of the solution is found by adding this value from the normal freezing point of the solvent ( 0.0°Cfor water):

new f.p. = 0.0°C −0.634°C

= −0.6341°C

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An operational definition is the statement of procedures the researcher is going to use to measure a specific variable.

Researchers can explain in detail what they mean when they use a phrase by using an operational definition. Operational definitions are typically measurable and concrete. This method of defining variables enables others to assess the validity of the study. Operationalization is the procedure in question.

The variables you'll utilize as indicators and the methods you'll employ to observe or measure them are both included in your operational definitions. No matter how solid your conceptual definition may be, you need an operational definition since without one, you cannot measure anything.

Operational variables, also known as operationalizing definitions, describe how you'll quantify and define a particular variable when it's applied to your research. This makes it possible for a different psychologist to duplicate your findings and is crucial in establishing.

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Explanation:

A reaction with another element

other choices are physical property

Answer:

A. reaction with another element

Answer:

389929.827

Explanation:

33806.78° C

Answer:

(a) 3.96 (w/w) %

(b) 0.663M

Explanation:

The acetic acid, CH₃COOH, reacts with NaOH as follows:

CH₃COOH + NaOH → CH₃COONa + H₂O

Where 1 mole of acetic acid reacts with 1 mole of NaOH

In the equivalence point of the titration, the moles of acetic acid are equal to moles of NaOH added. To solve this question we need to find the moles of NaOH and thus, the mass of acetic acid

Moles NaOH = Moles acetic acid:

33.0cm³ = 0.033L * (0.100moles / L) = 0.0033 moles

Mass acetic acid -Molar mass: 60g/mol-:

0.0033 moles * (60g / mol) = 0.198g

a) Weight percent is 100 times the ratio of the mass of acetic acid (0.198g) in the mass of vinegar (5.00g):

0.198g / 5.00g * 100 = 3.96 (w/w) %

(b) The volume of the vinegar in the 5.00g is:

5.00g * (1mL / 1.005g) * (1L / 1000mL) = 0.00498L

And the molarity is:

0.0033moles / 0.00498L = 0.663M

The lines with the arrow that points inwards radiating from the charge from all directions. Therefore, option B is correct.

Electric field is generated by the charged bodies. The electric field lines around a positive charges will always be outward to all directions. The field lines around a negative point charge is always inward from all directions.

At one point, a field line is drawn tangential to the net. As a result, the direction of the electric field at any point is the same as the tangent to the electric field line. Second, the relative strength (magnitude) of the electric field at a point is correlated with the relative density of the field lines around that point. 

Always pointing away from a positive charge and in the direction of a negative point are electric field lines. In actuality, positive charges are where electric fields begin and negative charges are where they end. Field lines never cross one another, too. If they do, it suggests that the electric field there has two directions.

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Answer:

Explanation:

Bond energy is the bond strength required to break and form the bonds of the chemicals. In the reaction, more energy was absorbed in the formation of the bonds. Thus, option A is correct.

An endothermic reaction is a chemical reaction that has lesser energy for the reactants compared to the products. The energy gets absorbed from the surroundings instead of getting released.

The bond energy required for the reactants' bond to be broken is higher than the energy required for the product's bond to be broken. This results in a lowering of the temperature of the system due to the cooling effect.

Therefore, option A. bond creation required more energy than breaking.

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by taking into account electronegativity differences, the organic reactive intermediate is a carbocation .When a covalent bond is broken, a previously bonded species takes both of the original bonding electrons from the other species.

This process is known as heterolysis or heterolytic fission. In other words, the electrons from the less electronegative atom will go to the more electronegative atom. Compared to lithium, carbon has a higher electronegativity. Therefore, upon heterolytic cleavage, carbon will possess both bonding electrons and a negative charge, resulting in the formation of a carbanion. Carbocation with an empty p orbital perpendicular to the plane of the positively charged molecule is generated via heterolytic cleavage of a bond and has a planar shape. Because of its positive charge, it reacts with nucleophiles, which are entities with lots of electrons.

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Answer:

Water filters remove elements that cause drinking water to have an unpleasant taste and smell, such as lead, chlorine and bacteria. Home water filtration system will improve the overall purity, taste and smell of your drinking water. It also lowers the pH level of the water that you drink.

Answer:

The average distance from Saturn to Jupiter is 402 million miles. The average distance from Saturn to Jupiter is 402 million miles or 4.32 AUs

The equation C2H4(g) + H2(g) + C2H6(g) → Caco3(s) + Cao(s) + CO2(g) shows an increase in entropy due to the formation of a gas as a product. Option A

In this equation, the reactants on the left-hand side consist of gases (C2H4 and H2), while the products on the right-hand side include a solid (Caco3) and a gas (CO2).

When a reaction involves a change from gaseous to solid or liquid states, there is typically a decrease in entropy because the particles become more ordered and constrained in the solid or liquid phase.

Conversely, when a reaction involves the formation of gases, there is generally an increase in entropy because gases have higher degrees of molecular motion and greater freedom of movement compared to solids or liquids.

In the given equation, the reactants include three gaseous compounds (C2H4, H2, and C2H6), and one of the products is a gas (CO2). Therefore, the overall entropy of the system increases during this reaction.

The equation Fe(s) + S(s) → FeS(s) does not show an increase in entropy. Both the reactants (Fe and S) and the product (FeS) are solids. Since solids have lower entropy compared to gases or liquids, the entropy of the system does not increase in this reaction. Option A

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When hydrogen bromide (HBr) is added to 2-methylbut-2-ene ((CH3)2CCHCH3), an electrophilic addition reaction takes place, where the π bond of the alkene is broken, and the hydrogen and bromine atoms are added to the resulting carbocation.

The reaction proceeds through a Markovnikov addition, where the hydrogen atom attaches to the carbon atom with the greater number of hydrogen atoms.

In this case, the initial addition of HBr to 2-methylbut-2-ene leads to the formation of a primary carbocation, as the positively charged carbon atom only has one alkyl group attached to it. The primary carbocation is relatively unstable, and it can undergo a rearrangement to form a more stable secondary carbocation.

The major product that is typically obtained is the 2-bromo-2-methylbutane. The hydrogen atom from HBr adds to the carbon with three hydrogen atoms (the more substituted carbon), resulting in the formation of a secondary carbocation.

On the other hand, a minor product is also formed, which is 3-bromo-2-methylbutane. This product arises from the addition of HBr to the primary carbocation, which is less stable. Although the primary carbocation is less favored, it can still be formed and lead to the formation of the minor product.

In summary, the addition of HBr to 2-methylbut-2-ene yields two products: the major product is 2-bromo-2-methylbutane, resulting from the addition of HBr to the more stable secondary carbocation, and the minor product is 3-bromo-2-methylbutane, originating from the less stable primary carbocation.

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The expression of the Ksp is Ksp =  [Ca²+] [2OH-]^2

In the balanced chemical equation for the solute's dissolution, Ksp is defined as the product of the ion concentrations in a saturated solution, each concentration being raised to the power of its stoichiometric coefficient.

Ksp is temperature-dependent and varies with different compounds. It is used to predict the maximum amount of a compound that can dissolve in a given solvent under specific conditions.

We know that we can be able to use the expression that has been given in the problem to arrive at the fact that;

Ksp =  [Ca²+] [2OH-]^2

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13) The concentration is 0.376 M.

14) The molecule is bent

15) The s orbital is spherically symmetrical

16) Barium and bromine are most apt to form an ionic bond

17) The enthalpy of reaction is equal to the enthalpy of formation for option C

18) The hybrid set of orbitals is shown by option B

19) Iodine forms the ion in option D

20) The enthalpy is - 44 kJ/mol

21) Carbon excited state is shown by option A

22) Option D does not violate the octet rule (carbon)

23) It is a transition metal

24) The structure is tetrahedral

25) The third ionization energy is shown by option C

26) The element is neon

Concentration = Number of moles/ volume

Concentration = 0.5 moles/1.22 L

= 0.376 M

The sulfur dioxide molecule is bent due to the fact that we have lone pairs in the molecule of the compound.

Given the fact that the s orbital do have a spherically symmetrical shape, the orbital quantum number is zero.

ΔH = Bonds broken - Bonds formed

= (614 + 4(413) + 433) - (5(413) + 348 + 328)

= 2698 - 2741

- 44 kJ/mol

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The performance of a laboratory technician in a blood bank is crucial as it directly impacts the quality of the blood products and patient safety. If there are five problems with a technician's work performance in the first year of work, it can have serious consequences for the blood bank's operations.

Some of the potential problems that may arise include:

Improper labeling of blood products: This can result in confusion and incorrect transfusions.

Mishandling of blood products: This can lead to contamination, spoilage, or improper storage, which can affect the quality of the blood products.

Failure to follow standard operating procedures: This can result in errors, deviations from protocols, and potential safety hazards.

Poor communication skills: This can result in misunderstandings, delays, and errors in documentation.

Inadequate training or knowledge: This can lead to mistakes, misinterpretation of test results, and failure to recognize potential problems.

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The concentration of Zn²⁺ ions at the cathode of the concentration cell is 0.646 M.

The concentration of the Zn²⁺ ions at the cathode of the concentration cell is determined as follows:

At the anode, oxidation half-reaction: Zn(s) ---> Zn²⁺ (aq) + 2 e⁻ [Zn⁺] = 0.100 M

At the cathode, reduction half-reaction: Zn²⁺ (aq) + 2 e⁻ ----> Zn (s)  [Zn⁺] =  x

The Ecell = 24.0 mV or 0.024 V

Using the Nernst equation:

Ecell = E°cell - 0.0592/n * log([Zn⁺]anode/[Zn⁺]cathode)

E°cell of a concentration cell = 0

where;

n is the number of moles of ions = 2

0.024 =  0 - 0.0592/2 * log (0.1/x)

y = 0.646 M

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Answer:

all of the above

Explanation:

have a nice day :-)

The  ions has the noble - gas electron arrangement. The following ions has a noble gas electron arrangement is Ti⁴⁺ .

The atomic number of the titanium is 22. The symbol of the titanium is Ti.

The electronic configuration of Ti is as follows :

Electronic configuration : 1s² 2s² 2p⁶ 3s² 3p⁶ 3d² 4s² or [Ar] 3d² 4s²

The Ti⁴⁺ means the titanium losses the four electrons and form the positively charged ion called as cation.

The electronic configuration of Ti⁴⁺ is as follows :

Electronic configuration : 1s² 2s² 2p⁶ 3s² 3p⁶ or [Ar]

Thus, the Ti⁴⁺  ions has a noble gas electron arrangement.

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