The orbits of the planets in our solar system are
not
a Elliptical, circular
b Circular, elliptical
C Circular, oval
d None of the above

Answer:

Specific heat capacity

Answer:

81.3 a

Explanation:

Just search up answers on wolframalpha.com

Answer:

Variation within genes leads to different genotypes , which can be seen by the individuals having different phenotypes . For example, the dogs above all have different fur colours and fur lengths. Genetic and environmental variation combine together to produce these different phenotypes.

The ratio  of water molecules to calcium sulfate in hydrate is 1:4.08.

Hydrated molecules contain water of crystallization which can be easily removed by heating the hydrated molecules. The water of crystallization are lost on heating as they are loosely bound to the main moiety.

On strong heating of hydrated form of calcium sulfate, which is 7.534 g anhydrous calcium sulfate of 5.957 grams is obtained. From this data, mass of water molecules liberated is calculated as,

7.534 g -5.957 g=1.577 g

The ratio of water molecules to calcium sulfate  is obtained by dividing mass of water molecules by mass of hydrated calcium sulfate units, which is, 1.577:7.534=1:4.08

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\(3\text{Ni} + 2\text{AuBr}_3 \longrightarrow 3\text{NiBr}_2 +2\text{Au}\)

In chemistry, a buffer is a solution that typically contains an acid and a base, or a salt, and which helps to keep the concentration of hydrogen ions constant. Atoms or molecules that have acquired or lost one or more electrons are known as ions.

When acidic or basic substances are added, a substance is said to be a buffer if it can endure the pH change. It can neutralize minor amounts of acid or base, essentially maintaining the solution's pH. This is important for processes and/or reactions that require specific and stable pH values. How much acid or base can be mitigated before pH changes, as well as how much pH will change, depends on the pH range and capacity of buffer solutions.

What components comprise a buffer?

To successfully maintain a pH range, a weak conjugate acid-base pair, which can be either a weak acid and its conjugate base or a weak base and its conjugate acid, must be present. The pH that is wanted when making the buffer will simply determine which should be used. The following, for instance, could serve as barriers when mixed together in a solution:

Sodium acetate is a salt that contains acetic acid, a weak organic acid with the formula \(CH_{3} COOH\) and its corresponding base, the acetate anion (\(CH_{3} COO-\)) (\(CH_{3}COONa\))

Pyridinium chloride is a compound that contains pyridinium cation (\(C_{5}H_{5}NH+\)), the conjugate acid of pyridine (weak base with formula \(C_{5}H_{5}N\)).

Ammonia (weak base with formula \(NH_{3}\)) and a salt having the ammonium cation, which is the conjugate acid of ammonia, are examples of such compounds (\(NH_{4}OH\))

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Answer:

When the Sun's energy moves through space, it reaches Earth's atmosphere and finally the surface. This radiant solar energy warms the atmosphere and becomes heat energy. This heat energy is transferred throughout the planet's systems in three ways: by radiation, conduction, and convection.

Explanation:

Answer:

The sun radiates energy in all directions. Most of it dissipates into space, but the tiny fraction of the sun's energy that reaches Earth is enough to heat the planet and drive the global weather system by warming the atmosphere and oceans. The delicate balance between the amount of heat Earth receives from the sun and the heat that Earth radiates back into space makes it possible for the planet to sustain life.

Hopefully, this helps you out!

Answer:

It's denser

Explanation:

When something is denser than another substance, it sinks into the substance.

Answer:

carbon because organic compounds are made up of hydrogen and carbon

Answer: 24.32 AMU

Explanation:

See attachment.

Answer:

C

Explanation:

Explanation:

The higher its electronegativity, the more an element attracts electrons. The atom with higher electronegativity, typically a nonmetallic element, is assigned a negative oxidation number, while metallic elements are typically assigned positive oxidation numbers.... Hope it is useful brainliest plz if it was useful....

The relationship between electrons and oxidation number has bee the negative oxidation number implies the gain of the electron, while positive oxidation number implies the loss of electron by elements.

The oxidation number has been defined as the number of electrons lost or gained by an element to form a chemical bond. The elements that lose electrons are assigned positive oxidation number.

The elements that gain electrons to form a chemical bond are assigned a negative oxidation number.

The relationship between electrons and oxidation number has bee the negative oxidation number implies the gain of the electron, while positive oxidation number implies the loss of electron by elements.

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Answer:

The formula for barium ion is Ba2+ and the formula for nitride ion is N3-. When combined, they form barium nitride with the formula Ba3N2.

Explanation:

The formula for the barium ion is Ba²⁺, the formula for the nitride ion is N³⁻.

In order to acquire a stable conformation, the metallic element barium from Group 2 of the periodic table readily loses two electrons.

The production of the Ba²⁺ ion, which has a 2+ charge as a result of the elimination of two negative charges, is the result of the loss of these two electrons.

The nitride ion has the formula N³⁻. A nonmetal element belonging to Group 15 of the periodic table is nitrogen.

To finish its valence shell and obtain a stable electron configuration, it can gain three electrons. The N³⁻ ion is created when nitrogen gains three electrons and three more negative charges, giving it a 3-charge.

Thus, the correct answer is Ba²⁺, and N³⁻.

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In double replacement reactions, the two metals will not combine with each other when products are formed because the atoms of metals contain less than half the full complement of electrons in their outermost shell.

This is referred to as a type of reaction in which the positive and negative ions of two compounds exchange places to form two new products or substances.

The two metals will not combine with each other when products are formed because of their atoms having less than the required electrons which is needed to complement those in the outermost shell.

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Answer:

a

Explanation:

I hope God it has to be 20 characters so here but I hope this right please have a god day

Answer:

The answer is "B. A conductor that has less conductivity than do metallic conductors."

Explanation:

I took the quiz on A P E X, and I got it right.

Taking into account the definition of molarity and the reaction stoichiometry:

In first place, the balanced reaction is:

NiCl₂ + 2 NaOH  → Ni(OH)₂ + 2 NaCl

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

The molar mass of the compounds is:

Then, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:

Molarity is a measure of the concentration of a solute in a solution and indicates the number of moles of solute that are dissolved in a given volume.

The molarity of a solution is calculated by dividing the moles of solute by the volume of the solution:

molarity= number of moles of solute÷ volume

Molarity is expressed in units moles/L.

First, you have 26.0 mL(0.026 L) of a 0.420 M NiCl₂. Replacing in the definition of molarity:

0.420 M= number of moles of NiCl₂÷ 0.026 L

Solving:

0.420 M× 0.026 L= number of moles of NiCl₂

0.01092 moles= number of moles of NiCl₂

Now, the following rule of three can be applied: If by reaction stoichiometry 1 mole of NiCl₂ react with 2 moles of NaOH, 0.01092 moles of NiCl₂ react with how many moles of NaOH?

moles of NaOH= (0.01092 moles of NiCl₂×2 moles of NaOH)÷1 mole of NiCl₂

moles of NaOH= 0.02184 moles

If you have a solution of 0.200 M NaOH, replacing in the definition of molarity you get:

0.200 M= 0.02184 moles÷ Volume of NaOH

Solving:

0.200 M×Volume of NaOH= 0.02184 moles

Volume of NaOH= 0.02184 moles ÷0.200 M

Volume of NaOH= 0.1092 L= 109.2 mL

Finally, a volume of 109.2 mL of 0.200 M NaOH solution are needed.

First, you have 48.0 mL(0.048 L) of a 1.80 M NaOH. Replacing in the definition of molarity:

1.80 M= number of moles of NaOH÷ 0.048 L

Solving:

1.80 M× 0.048 L= number of moles of NaOH

0.0864 moles= number of moles of NaOH

Now, the following rule of three can be applied: if by reaction stoichiometry 2 moles of NaOH form 92.7 grams of Ni(OH)₂, 0.0864 moles of NaOH form how much mass of Ni(OH)₂?

mass of Ni(OH)₂= (0.0864 moles of NaOH×92.7 grams of Ni(OH)₂)÷2 moles of NaOH

mass of Ni(OH)₂= 4.00464 grams

Finally, 4.00464 grams of Ni(OH)₂ are formed from the reaction of 48.0 mL of a 1.80 M NaOH solution and excess NiCl₂.

First, you have 11.3 mL(0.0113 L) of a 0.360 M NaOH. Replacing in the definition of molarity:

0.360 M= number of moles of NaOH÷ 0.0113 L

Solving:

0.360 M× 0.0113 L= number of moles of NaOH

0.004068 moles= number of moles of NaOH

Now, the following rule of three can be applied: If by reaction stoichiometry 2 moles of NaOH react with 1 mole of NiCl₂, 0.004098 moles of NaOH react with how many moles of NiCl₂?

moles of NiCl₂= (0.004098 moles of NaOH×1 mole of NiCl₂)÷2 moles of NaOH

moles of NiCl₂= 0.002034 moles

If you have 30 mL (0.030 L) NaOH, replacing in the definition of molarity you get:

Molarity= 0.002034 moles÷ 0.030 L

Solving:

Molarity= 0.0678 moles/L= 0.0678 M

Finally, the molarity of 30.0 mL of a NiCl₂ solution is 0.0678 M.

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N₂(g) + 3H₂(g) → 2NH₃(g) If we have 12 moles of hydrogen gas, 4.0 moles of nitrogen gas will need to completely react with hydrogen gas.

The amount of substance of a system which includes as many elementary entities is called as mole.

One mole of any substance is equal to 6.023 × 10²³ units of that substance such as atoms, molecules, or ions. The number 6.023 × 10²³ is called as Avogadro's constant.

In Haber process, N₂ reacts with H₂ and formed NH₃.

The balanced equation for the Haber process is as follows:

N₂(g) + 3H₂(g) → 2NH₃(g)

The stoichiometric ratio of H₂ and N₂ is 3 : 1

Therefore, reacted moles of N₂ = reacted moles of H₂ / 3

So, moles of N₂ = 12.0 mol / 3

= 4.0 mol

Thus, 4.0 moles of N₂ is needed to react with 9.0 moles of H₂.

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Answer:

n = 6

Explanation:

moles = m/MM

n = 350g/58.44g/mol = 5.989

Honestly just round up at this point, n = 6

The final temperature of the two substances after they are allowed to reach thermal equilibrium will be closer to the initial temperature of substance B.

This is because the specific heat capacity of substance B is two times that of substance A, meaning it takes twice as much energy to change the temperature of substance B by one degree. Additionally, the mass of substance A is four times the mass of substance B, meaning it has more thermal energy to transfer to substance B.

When the two substances are brought together and allowed to reach thermal equilibrium, the thermal energy will transfer from the substance with the higher temperature to the substance with the lower temperature until they are at the same temperature. Since substance B has a higher specific heat capacity and a lower mass, it will require more thermal energy to reach the same temperature as substance A. Therefore, the final temperature of the two substances will be closer to the initial temperature of substance B.

In conclusion, the final temperature of the two substances after they are allowed to reach thermal equilibrium will be closer to the initial temperature of substance B due to its higher specific heat capacity and lower mass.

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Answer: Spontaneous combustion of a person is an instant ignition of the body without any external influence, that is, there are no signs of fire or fire at all.

Spontaneous human combustion (SHC) is a phenomenon in which a human body is said to suddenly and inexplicably catch fire, burning to ashes without any external source of ignition.

Phenomenon is a broad term that can be used to describe any observable occurrence. It is usually used to describe events that are extraordinary or beyond the norm of what is usually seen. The phenomenon can be natural or man-made, and can range from the spectacular to the mundane. Phenomenon can also refer to a concept or idea that is widely accepted or believed. Phenomenon can also be used to describe any event or occurrence that is remarkable or noteworthy, regardless of whether it is natural or man-made.

It has been a subject of interest and speculation for centuries, and has been cited as a phenomenon in various works of literature. However, there is no scientific consensus on the subject and the cause of SHC remains unknown. Many skeptics argue that it is likely that SHC is caused by external factors, such as a nearby flame, rather than an internal combustion.

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Answer:

Mass is an extensive physical property, it depends on the amount of matter being measured. It is physical because it can be measured without changing a substance's chemical identity.

The ideal gas law formula is used to determine the missing values in questions. When dealing with problems that require solving for missing values using the ideal gas law formula, always ensure that all values are expressed in the correct units and temperature is converted to kelvin.

The ideal gas law formula is represented as PV = nRT, where P represents pressure, V represents volume, n represents the number of moles of gas, T represents the temperature in kelvin, and R represents the universal gas constant. Solve for missing values using the ideal gas law formula:1. 10°C, 5. 5 L, 2 mol, __ atm.The temperature must be converted to kelvin first: T(K) = T(°C) + 273.15K = 10°C + 273.15 = 283.15KPV = nRT

Rearrange the equation to isolate P: P = nRT / V

Substitute the given values:

P = (2 mol)(0.0821 L•atm/mol•K)(283.15K) / 5.5 L

: P = 8.28 atm

2. __ °C, 8. 3 L, 5 mol, 1. 8 atm.The equation PV = nRT can be rearranged to T = PV / nRThe temperature must be converted to kelvin first: T(K) = T(°C) + 273.15T = PV / nR

Substitute the given values: T = (1.8 atm)(8.3 L) / (5 mol)(0.0821 L•atm/mol•K)T(K) = T +

: T = 332 K or 59°C

The temperature must be converted to kelvin first:

T(K) = T(°C) + 273.15K

= 12°C + 273.15

= 285.15

KPV = nRT

Solve for n by rearranging the equation: n = PV / RT

Substitute the given values: n = (1.2 atm)(3.4 L) / (0.0821 L•atm/mol•K)(285.15K): n = 0.141 mol

The ideal gas law formula is used to determine the missing values in questions. When dealing with problems that require solving for missing values using the ideal gas law formula, always ensure that all values are expressed in the correct units and temperature is converted to kelvin.

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Answer:

I hope this will help

Explanation:

Copper is purified by electrolysis . Electricity is passed through solutions containing copper compounds, such as copper(II) sulfate. The anode (positive electrode ) is made from impure copper and the cathode (negative electrode) is made from pure copper.

The rate at which the tank is filled in gallons per second is 3 gallons per minute.

In this question, we are supposed to calculate the rate at which the tank is filled in gallons per second and cubic meters per second. Additionally, we also need to determine the time interval required to fill a 1.00−m3 volume at the same rate.

A) The time required to fill the tank is 5.00 min and the tank is 15.0-gallon. Therefore, the rate at which the tank is filled in gallons per second is given by;

Rate = 15.0 gal / 5.00 min

= 3 gal / min.

Now, to calculate the rate at which the tank is filled in cubic meters per second, we first convert the gallons to cubic inches, then to cubic meters.

B) 1 US gallon = 231 cubic inches, and 1 cubic inch = 0.0254 m³

Therefore, the rate at which the tank is filled in cubic meters per second is;

Rate = (3 gal/min) * (231 in³/gal) * (0.0254 m/in)³ = 0.00794 m³/s

C) To determine the time interval required to fill a 1.00−m3 volume at the same rate, we can use the rate calculated in part (b). Thus,

Time = (Volume) / (Rate)

= 1.00 m³ / 0.00794 m³/s

= 125.7 s = 2.09 hr

Thus, the rate at which the tank is filled in gallons per second is 3 gallons per minute, the rate at which the tank is filled in cubic meters per second is 0.00794 m³/s, and the time interval required to fill a 1.00−m3 volume at the same rate is 2.09 hours.

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The citation you provided is from a scientific paper titled "Atomically Thin p-n Junctions with van der Waals Heterointerfaces" by C.E.A. Lee, published in the journal Nature Nanotechnology in 2014.

The term "atomically thin" refers to the extremely thin nature of the junction, which is only a few atomic layers thick. This is made possible by the use of van der Waals heterointerfaces, which are interfaces between different layered materials held together by weak van der Waals forces. Examples of layered materials include graphene and transition metal dichalcogenides.

The paper explores the fabrication and characterization of these atomically thin p-n junctions, highlighting their potential for future electronic devices with high performance and low power consumption.

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Answer:

coastal area with very high tides deep ocean water miles from a river's mouth

Explanation:

Marshes are a type of wetland ecosystem where water covers the ground for long periods of time. Marshes are dominated by herbaceous plants, such as grasses, reeds, and sedges(National Geographic Society).

Animals found in a marsh include;  frogs, toads, turtles, snakes, mammals, birds and insects. A marsh is a wetland that is dominated by herbaceous rather than woody plant species(Wikipedia). It is characterized by very high tides deep ocean water miles from a river's mouth.

Answer:

a shallow, sheltered area near an estuary

Explanation:

Answer:

Explanation:

the answer is b.

since the only way to have a reaction, it needs to be equal on both sides, and 2Na+ 2H₂O as the reactants is the same on the product side 2NaOH + H₂

reactants

H = 4

Na = 2

O = 1

products

Na = 2

H = 4

O = 1

hopefully this helps :)