Elements 104, 105, and 106 have been named rutherfordium (Rf), dubnium (Db), and seaborgium (Sg), respectively. These elements are synthesized from californium-249 by bombarding with carbon-12, nitrogen-15, and oxygen-18 nuclei, respectively. Four neutrons are formed in each reaction as well. (b) Write the equations in shorthand notation.

Answer:

Lead (II) Sulfate

Explanation:

Don't forget to add the (II) marking indicating that lead has a charge of 2+ (because Sulfate has a charge of 2-, balancing the ion).

The full name of the compound is Lead sulfate.

An ionic compound is a compound held together with an ionic bond, or a bond that utilizes opposite charges to be held together

Ionic compounds are named by stating the cation first, followed by the anion.

Positive and negative charges must balance.

Some anions have multiple forms and are named accordingly with the use of roman numerals in parentheses.

Ternary compounds are composed of three or more elements.

Therefore, The full name of the compound is Lead sulfate.

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Answer:

16 atm

Explanation:

The compound is named 2,3-dibromo-2,4-hexadienedioic acid, which consists of a six-membered ring with alternating single and double bonds.

The line-angle formula describes a six-membered ring with alternating single and double bonds. To name the compound, we need to consider the functional groups and substituents present.

The carboxylic acid group, -COOH, is attached to the first vertex of the ring. This group is named as "hexanedioic acid" because it contains six carbon atoms in a linear chain. The prefix "hexa-" indicates the presence of six carbons, and the suffix "-dioic acid" denotes the presence of two carboxylic acid groups.

The bromine atom, represented by "Br," is attached to the third vertex in a clockwise direction. Since there are two bromine atoms present, the prefix "di-" is used. Thus, the compound is named "dibromo-hexanedioic acid."

To specify the positions of the bromine atoms, we start numbering the ring from the vertex where the carboxylic acid group is attached, which is the first vertex. Moving clockwise, the second vertex has a double bond, the third vertex has a bromine atom, and the fourth vertex has a double bond. Therefore, the compound is named as "2,3-dibromo-2,4-hexadienedioic acid." The numbers indicate the positions of the substituents in the ring.

In summary, the compound is named 2,3-dibromo-2,4-hexadienedioic acid, which represents a six-membered ring with alternating single and double bonds, a carboxylic acid group attached to the first vertex, and a bromine atom attached to the third vertex in a clockwise direction.

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The statement that is true about the gold atom and atomic weight is "An atom of gold always has an atomic weight of 79."

The atomic number of an element is determined by the number of protons in its nucleus. The element with atomic number 79 is gold, which has the symbol, Au. If a gold atom loses one electron, it does not change into platinum, which is an element with atomic number 78. The number of protons in a gold atom, and therefore its atomic number, remains constant.

The atomic weight of an element is determined by the number of protons and neutrons in its nucleus. Since gold has 79 protons, an atom of gold will have an atomic weight of approximately 197, which is the sum of the number of protons and neutrons in its nucleus.

Therefore, the statement that is true about the gold atom and atomic weight is "An atom of gold always has an atomic weight of 79."

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A stereomicroscope has a larger field of view and shallower depth of field than compound microscopes.

At low magnifications, a stereomicroscope, also referred to as a dissecting microscope, is intended to give a three-dimensional picture of specimens. For binocular vision, it typically has two distinct optical pathways for each eye. Compared to a compound microscope, this design allows for a wider field of view, allowing you to see a bigger portion of the specimen.

Stereomicroscopes have lower magnification levels, therefore the depth of field is shallower as a result. The range of distances that appear in focus at a specific magnification is referred to as the depth of field. Only a small portion of the specimen's depth can be clearly seen at once using a stereomicroscope. This is because, unlike compound microscopes, which are used largely for studying fine internal structures, stereomicroscopes are employed primarily for observing the surface details of objects.

Contrarily, compound microscopes are made for seeing thin, clear specimens at high magnification. They have a limited range of view but a larger depth of field, enabling close analysis of minuscule specimen structures.

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Answer:

the 3rd one

Explanation:

A redox reaction is a chemical reaction in which one or more of the reacting species undergoes oxidation and one or more undergoes reduction. An oxidizing agent is an element or compound that oxidizes another substance, while a reducing agent is an element or compound that reduces another substance.

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The amount in grams is the 6 mmol of the magnesium is  0.145 g.

The mmol of the magnesium = 6 mmol

1 mmol = 0.001 mol

The 6 mmol = 0.006 mol

The molar mass of the magnesium = 24.30 g/mol

The number of the moles = mass / molar mass

Where,

The Moles = 0.006 mol

The molar mass magnesium =  24.30 g/mol

The number of the moles = mass / molar mass

The mass of the magnesium = 0.006 / 24.30

The mass of the magnesium  = 0.145 g

Thus, the grams of the magnesium is 0.145 g in the 6 mmol of the magnesium.

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Answer:

It depends on what you would use it for.

Explanation:

It asks

The product of the electron transport chain that reenters the krebs cycle is NAD. Details about electron transport chain can be found below.

Cellular respiration is the process by which living organisms break down food molecules in their cells.

The process of cellular respiration involves the following stages:

The electron transport chain is a series of reactions that involve the transfer of electrons from one molecule to another. NAD+ is one of the electron acceptor and products of the ETC that reenters the kreb cycle.

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"Action Potential" is the name for the electrochemical signal that allows neurons to communicate with neighboring cells.

Electrochemical signals are those that are sent by neurons. An electric potential which goes along length of the cell is produced by a neuron after it has been triggered by a stimulus of some kind. The "electro" component of electrochemical is this.

A neuron's membrane conducts an electrical charge known as an action potential, commonly known as a nerve impulse. It can be produced when chemical inputs from a neighbouring cell alter a neuron's membrane potential.

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Answer: C2H4 + 3O2  2CO2 + 2H2O

Explanation: Since the exact same amount of atoms is on both sides, no mass or matter is lost which agrees with the law of conservation of mass. This law states that The law of conservation of mass is that, in a closed or isolated system, matter cannot be created or destroyed. It can change forms but is conserved.

Hope this helped!

Answer:

The Planetary model said that electrons were in a fixed orbit

Explanation:

Bohr said that the shape of the atom was like a our universe. Nucleus in the middle with protons and electrons were in a fixed orbit around the nucleus.

However, now we know electrons are not in a fixed orbit due to Schrodiger's model aka the electron cloud model that proves the electron is not on a fixed orbit.

If a chemical reaction has a negative AH and a negative AS, then it will be spontaneous at low temperatures and non-spontaneous at high temperatures.

The spontaneity of a reaction is determined by the sign and magnitude of the change in Gibbs free energy (G). The equation for calculating Gibbs free energy is:

ΔG = ΔH - TΔS

where H is the change in enthalpy, T is the temperature in kelvins, and S is the change in entropy.

When G is negative, the reaction is spontaneous.

When G is positive, the reaction is non-spontaneous.

When G is zero, the reaction is at equilibrium. If a chemical reaction has a negative H and a negative S, then the formula for Gibbs free energy becomes:

G = H - TS = (-) - T(-) When T is low, -TS will be small, so G will be negative, and the reaction will be spontaneous.

When T is high, -TS will be large, so G will be positive and the reaction will be non-spontaneous.

Therefore, the answer is D

It will be spontaneous at low temperatures and non-spontaneous at high temperatures.

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The volume of air expelled from the lungs at 37°C that occupies a volume of 2.9 L would occupy a volume of  2.55 L  at temperature 0.2°C.

To solve this problem, we can use the combined gas law, which relates the initial and final volumes, temperatures, and pressures of a gas when the number of particles is constant:

(P₁ * V₁) / (n * R * T₁) = (P₂ * V₂) / (n * R * T₂)

where P₁ and P₂ are the initial and final pressures, V₁ and V₂ are the initial and final volumes, n is the number of gas particles, R is the ideal gas constant, T₁ and T₂ are the initial and final temperatures.

In this case, we can assume that the pressure and the number of gas particles remain constant, so we can simplify the equation as:

V₁ / T₁ = V₂ / T₂

We are given the initial volume V₁ = 2.9 L and the initial temperature T₁ = 37°C = 310 K. We need to find the final volume V₂ at the final temperature T₂ = 0.2°C = 273.2 K.

Substituting these values into the equation, we get:

V₂ = V₁ * (T₂ / T₁)

V₂ = 2.9 L * (273.2 K / 310 K)

V₂ = 2.55 L (rounded to two significant figures)

Therefore, the  occupied volume = 2.55 L.

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Answer:

1.8 g/ml

Explanation:

density = mass/volume

d = 54/30

Answer:

We know (by definition) that: 1 yr ≈ 525948.77 min.

We can set up a proportion to solve for the number of minutes.

1 yr / 714 yr ≈ 525948.77 min / x min

Now, we cross multiply to solve for our unknown x:

x min ≈ (714 yr / 1 yr) * 525948.77 min → x min ≈ 375527421.78000003 min

Conclusion:

714 yr ≈ 375527421.78000003 min

Explanation:

Hope it is helpful....

\(714 \: y \times \frac{12 \: months}{1 \: years} \times \frac{30.417 \: days}{1 \: month}\)

\( = 260612.856 \: days\)

\(260612.856 \: days \times \frac{24 \: h}{1 \: day} \times \frac{60 \: min}{1 \: h}\)

\( = 375282512.6 \: minutes\)

\(\\ \sf\ast\Rrightarrow 2H_2O\longrightarrow 2H_2+O_2,\Delta H=484J\)

\(\\ \sf\ast\Rrightarrow 2NH_3\longrightarrow N_2+3H_2,\Delta H=92J\)

\(\\ \sf\ast\Rrightarrow \Delta H=+ve(Endothermic)\)

\(\\ \sf\ast\Rrightarrow \Delta H=-ve(Exothermic)\)

Answer:

the volume should be in cubic cm so I assumed that you wanted to write the same . then the answer is 5489.07 kg/m^3

Answer:

\(\boxed {\boxed {\sf d\approx5.49 \ g/cm^3}}\)

Explanation:

Density can be found by dividing the mass by the volume.

\(d=\frac{m}{v}\)

The mass of the rock is 555 grams and the volume is 101.1 cubic centimeters.

\(m=555 \ g \\v= 101.1 \ cm^3\)

Substitute the values into the formula.

\(d=\frac{555 \ g}{101.1 \ cm^3}\)

Divide.

\(d=5.48961424 \ g/cm^3\)

Let's round to the nearest hundredth to make the answer more concise.

The 9 in the thousandth place tells us to round up. In the tenth place, the 8 will become a 9.

\(d\approx5.49 \ g/cm^3\)

The density of the rock is about 5.49 grams per cubic centimeter.

Answer:

True, there’s Prokaryotic and Eukaryotic

Explanation:

Eukaryotic are more complex and HAVE a nucleus, Prokaryotic are less complex and don’t have a nucleus

The spontaneity of a reaction is determined by the Gibbs free energy change (∆G), which is a measure of the system's ability to do work.

The equation that links ∆G, ∆H, and ∆S is: ∆G = ∆H - T∆S, where T is the temperature in Kelvin and ∆H and ∆S are the enthalpy and entropy changes, respectively. The signs of ∆H and ∆S determine whether the reaction is exothermic or endothermic and whether it is entropy-driven or enthalpy-driven, respectively.

If ∆G is negative, the reaction is spontaneous, meaning it occurs without the input of energy.The given reaction has a ∆H of 23.25 kJ and a ∆S of 161.26 J/mol∙K.

First, we need to convert the units of ∆S from J/mol∙K to kJ/mol∙K by dividing by 1000.∆S = 161.26 J/mol∙K ÷ 1000 = 0.16126 kJ/mol∙K Substitute the values into the equation to determine the spontaneity of the reaction:

∆G = ∆H - T∆S∆G = (23.25 kJ) - (298 K) x (0.16126 kJ/mol∙K)∆G = 23.25 kJ - 48.02 kJ∆G = -24.77 kJ Since ∆G is negative, the reaction is spontaneous.

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Answer:

C) Orion spur.

The Orion Arm is a minor spiral arm of the Milky Way Galaxy that is 3,500 light-years across and approximately 10,000 light-years in length, containing the Solar System, including Earth.

Answer:

pretty sure u did it right??

Answer:

That's right!

-How many protons will be in the ion?

•15 protons

The formula of the bromic acid is HBrO₃. IT is also called as the hydrogen bromate.

The Bromic acid, that is also known as the hydrogen bromate, is the type of the  oxoacid with the molecular formula of HBrO₃.  It will only exists in the aqueous solution. It is the colorless solution that will turns the yellow at the room temperature as it will decomposes to the bromine.

The bromic acid is stable only when  in the very dilute solutions, it is usually produced by reaction of the barium bromate with the sulfuric acid. It is  used as the oxidizing agent in the manufacture of the dyes and the pharmaceuticals.

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Answer:

vVv

Explanation:

innate means "inborn or natural", meaning they were born with it. if somewhat is born with an inate immunity, it means it was passed through genetics aka heredity

Answer: D

Explanation:

The statement that describes the effect of large asteroid and comet impacts is they may kick up dust and pollute Earth’s atmosphere. The correct option is D.

Asteroids are the small, big rocks that are made up of dust, and rocks. They orbit the sun and are smaller than a planet. An asteroid hits the earth like 65 million years ago. When asteroids and comets hit the earth's surface, they create large or small craters.

Comets are small or large snowy balls of gases. They are made up of rocks, and dust, and they orbit the sun. They orbit the sun. A comet has three parts, a nucleus, a comma, and a tail. When it comes near the sun, it converts into a burning ball of gases.

Thus, the correct option is D. They may cause small craters on Earth’s surface.

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Answer:

wat do we have to do here ????

Answer:

than what can i do lol

The atomic weight of the element is approximately 35.4535 amu.

The average mass of an element in relation to all of its isotopes and their relative abundances is known as its atomic weight. Atomic mass units, sometimes referred to as Daltons, are used to measure atomic weight. The same element can have different isotopes.

The atomic weight (also known as atomic mass) of an element is the weighted average of the masses of its isotopes, taking into account their natural abundance.

To find the atomic weight of the element given in the problem, we can use the following formula:

atomic weight = (mass1 x abundance1 + mass2 x abundance2) / 100

where mass1 and mass2 are the masses of the two isotopes, and abundance1 and abundance2 are their natural abundances as percentages.

Substituting the given values, we get: The natural abundances of the two isotopes, abundance1 and abundance2, are expressed as percentages.

Inputting the values provided yields:

atomic weight = (35.0 amu x 75.5% + 36.9 amu x 24.5%) / 100

atomic weight = (2642.5 + 904.05) / 100

atomic weight = 35.4535 amu

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The element that is being reduced in the given redox reaction is Cl (Chlorine)

The given redox reaction is

Cr(OH)₄⁻(aq) + ClO⁻(aq) → CrO₄²⁻(aq) + Cl⁻(aq)

First, we will define the terms oxidation and reduction

Oxidation can be defined as an increase in oxidation number

Reduction is defined as a decrease in oxidation number

This means the element that is being reduced in the reaction would have a decrease in oxidation number.

Oxidation number of Cr in Cr(OH)₄⁻ is +3; and the oxidation number of Cr in CrO₄²⁻ is +6. This is an increase in oxidation number and it means Cr is being oxidized.

Oxidation number of Cl in ClO⁻ is +1; and the oxidation number of Cl in Cl⁻ is -1. This is a decrease in oxidation number and it means Cl is being reduced.

Hence, the element that is being reduced in the given redox reaction is Cl (Chlorine).

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