the sun has the same diameter as jupiter?

Answer:

methane

Explanation: methane is obtained from the decaying of flora and fauna mostlyunder damp

Answer:

It is a combustion reaction.

The positive value of 571.6 kJwhich is the enthalpy change tells us that it is exothermic

When energy is released into the surrounding area during a chemical reaction, it's considered an exothermic reaction with ΔH < 0. Conversely, endothermic reactions result from heat absorption with ΔH > 0.

The provided equation's positive value of 571.6 kJ reveals that heat is pouring out of the reaction, causing negative changes in enthalpy and firmly placing this chemical event as exothermic in nature.

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Answer:

the answer is helium but more of then but for now use helium

Answer:

C: The atomic nucleus contains most of the mass.

A. The maximum theoretical yield of the gaseous product in grams is 0.037 g

B. The grams of the excess reagent are left over is 0.97 g

C. The pH of the HBr solution is 1.37

D. The OH¯ concentration of the HBr solution is 2.33×10¯¹³ M

E. The volume (in mL) of the gaseous product is 323 mL

F. The new temperature of the gas is 61 °C

We'll begin by calculating the mole of HBr in the solution. This is illustrated below:

Molarity = mole / Volume

Mole = molarity × volume

Mole of HBr = 0.043 × 0.8506

Mole of HBr = 0.0366 mole

Thus, the mass of HBr can be obtained as follow:

Mass = mole × molar mass

Mass of HBr = 0.0366 × 81

Mass of HBr = 2.96 g

Balanced equation

Ca + 2HBr --> CaBr₂ + H₂

Molar mass of Ca = 40 g/mol

Mass of Ca from the balanced equation = 1 × 40 = 40 g

Molar mass of HBr = 81 g/mol

Mass of HBr from the balanced equation = 2 × 81 = 162 g

Molar mass of H₂ = 2 g/mol

Mass of H₂ from the balanced equation = 1 × 2 = 2 g

SUMMARY

From the balanced equation above,

40 g of Ca reacted with 162 g of HBr to produce 2 g of H₂

Next, we shall determine the limiting reactant.

From the balanced equation above,

40 g of Ca reacted with 162 g of HBr.

Therefore,

1.7 g of Ca will react with = (1.7 × 162) / 40 = 6.885 g of HBr.

Since a higher amount of HBr is needed, therefore HBr is the limiting reactant and Ca is the excess reactant

Finally, we shall determine the maximum theoretical yield of the gaseous product. details below

From the balanced equation above,

162 g of HBr reacted to produce 2 g of H₂.

Therefore,

2.96 g of HBr will react to produce = (2.96 × 2) / 162 = 0.037 g of H₂

Thus, The maximum theoretical yield of the gaseous product obtained is 0.037 g

Ca is the excess reactant

From the balanced equation above,

162 g of HBr reacted with 40 g of Ca.

Therefore,

2.96 g of HBr will react with = (2.96 × 40) / 162 = 0.73 g

Thus, the mass of the excess reactant leftover can be obtained as illustrated below:

Mass of excess reactant leftover = 1.7 - 0.73

Mass of excess reactant leftover = 0.97 g

pH = –Log H⁺

pH = –Log 0.043

pH = 1.37

[H⁺] × [OH¯] = 10¯¹⁴

0.043 × [OH¯] = 10¯¹⁴

Divide both side by 0.043

[OH¯] = 10¯¹⁴ / 0.043

[OH¯] = 2.33×10¯¹³ M

Using the ideal gas equation, the volume of the gas can be obtained as follow:

PV = nRT

Divide both side by P

V = nRT / P

V = (0.0185 × 0.0821 × 362) / 1.7

V = 0.323 L

Multiply by 1000 to express in mL

V = 0.323 × 1000

V = 323 mL

The new temperature of the gas can be obtained by using the combined gas equation as illustrated below:

P₁V₁ / T₁ = P₂V₂ / T₂

(1.7 × 0.323) / 362 = (0.329 × 1.54) / T₂

Cross multiply

1.7 × 0.323 × T₂ = 362 × 0.329 × 1.54

Divide both side by 1.7 × 0.323

T₂ = (362 × 0.329 × 1.54) / (1.7 × 0.323 )

T₂ = 334 K

Subtract 273 to obtain answer in °C

T₂ = 334 – 273 K

T₂ = 61 °C

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The primary difficulties in creating a low-cost, portable water purification system include assuring efficient pollution removal, compact design, durability etc.

In order to create a low-cost, portable water purification system, engineers must overcome several main obstacles and challenges, including: ensuring the removal of contaminants effectively; designing a compact and lightweight system; guaranteeing durability and reliability in harsh environments; providing an affordable, sustainable power source; and addressing cultural and social factors that may affect user acceptance and adoption.

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Answer:

B-100

Explanation:

ppm is an unit of concentration that could be defined as the mass in mg of solute (In this case, NaCl) per kg of solution.

Now, a solution of NaCl that is 0.01% by mass, contains 0.01g of NaCl in 100g of solution.

To solve this question, we must convert the mass of NaCl to mg and the mass of solution to kg:

Mass NaCl:

0.01g * (1000mg / 1g) = 10mg

Mass Solution:

100g * (1kg / 1000g) = 0.10kg

The ppm are:

10mg / 0.10kg =

100ppm

Right answer is:

Concentration of the reactants decreases over time as they are used up in the reaction. This means that there are fewer collisions between the reactant particles per unit time, leading to a decrease in the rate of reaction. Additionally, as the reaction progresses, the concentration of the product molecules increases, leading to an increase in the likelihood of the reverse reaction (i.e., CaCl2 + H2O + CO2 → CaCO3 + 2HCl) occurring. This also contributes to a decrease in the rate of the forward reaction over time.

Benzene has a combustion energy of -3.11 kJ/g.

The balanced formula for benzene combustion is

\(6CO_2 + 3H_2O from C_6H_6 + 15O_2\)

We may use the stoichiometric ratio of benzene to oxygen, 1:15, to calculate how much oxygen is necessary to burn 0.500 g of benzene:

O2:15 moles:1 mole \(C_6H_6\)

0.000476 moles C6H6: 0.00714 moles \(O_2\).

3266 kJ/mol of energy is released during the combustion of one mole of benzene. The energy produced as a result of burning 0.000476 moles of benzene is:

E = 3266 kJ/mol 0.000476 moles.

ΔE = -1.556 kJ

determine how much energy the water has absorbed:

q = m × c × ΔT

According to the preceding question, if the water's beginning temperature is 25.0°C and its end temperature is 36.2°C, the temperature change is:

ΔT = 36.2°C - 25.0°C

ΔT = 11.2°C

Now that the values have been substituted, we can determine how much heat the water has absorbed:

250.0 g, 4.184 J/g, 11.2°C, and q

q = 11,126.4 J

The combustion energy per gramme of benzene may then be calculated by converting the units of E to kJ/g as follows:

ΔE = -1.556 kJ / 0.500 g

ΔE = -3.11 kJ/g

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The combustion energy of benzene is -3.11 kJ/g.

What is  Combustion Energy?

The energy released when a specific quantity of a substance burns entirely in oxygen is known as the heat of combustion of the substance.

Calculation-

1 mole of O2 in 15 moles

0.00714 moles: 0.000476 moles of C6H6.

The form of the energy is:

E is 3266 kJ per mole, or 0.000476 moles.

ΔE = -1.556 kJ

tally up the energy that the water has absorbed:

q = m × c × ΔT

The shift in temperature is:

ΔT = 36.2°C - 25.0°C

ΔT = 11.2°C

How much heat the water has absorbed can be calculated:

4.184 J/g, 11.2 °C, 250.0 g, and q

q = 11,126.4 J

By changing the units of E to kJ/g, it is possible to compute the combustion energy per gramme as follows:

ΔE = -1.556 kJ / 0.500 g

ΔE = -3.11 kJ/g

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Answer:

C

Explanation:

I believe it would be weather because climate is the average temperature of a area. This leads me to believe it is c.

I am sorry if this is incorrect, but that is what I would've went with if I was taking the test. :)

125 grams of zinc was reacted, therefore, 125 grams of zinc will produce 42.6 liters of hydrogen gas at STP, and the problem involves stoichiometry, which is the calculation of reactants and products in a chemical reaction.

The balanced chemical equation for the reaction of zinc and hydrochloric acid is:

Zn + 2HCl → ZnCl₂ + H₂

From the equation,

125 g Zn x (1 mole Zn/65.38 g) = 1.91 moles Zn

So, one can expect 1.91 moles of hydrogen gas to be produced.

Now, at STP (standard temperature and pressure), the volume of one mole of gas is 22.4 liters. Therefore, the volume of hydrogen gas produced at STP can be calculated as:

1.91 moles H2 x 22.4 L/mole = 42.6 L H2

Therefore, 125 grams of zinc will produce 42.6 liters of hydrogen gas at STP.

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Answer

CO2 and NO are covalent

Explanation:

Which of the following are covalent compounds? Select all that apply.

CaO

CO2

KBr

NO

the atoms ib covalent compounds share electron pairsO

CaO and KBr are ioinic

CO2 and NO are covalent

The covalent compounds are \(CO_2\) and \(NO\).

The covalent compounds are bonded to each other by the mutual sharing of electrons between them referred to as the covalent bond in the structure.

Covalent bonds are chemical bonds formed when two atoms share electrons to achieve a stable electron configuration. In covalent bonding, atoms combine by sharing their outermost electrons to achieve a full valence electron shell.

Covalent bonds typically form between nonmetal elements that have similar electronegativities.

The rest of the compounds are held by the ionic forces of attraction and hence referred to as the ionic compounds. An ionic compound contains a metal and a non-metal to be bonded to each other.

Therefore, the covalent compounds provided in the list are \(CO_2\) and \(NO\).

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Answer:

496 g of Fe₂O₃.

Explanation:

The balanced equation for the reaction is given below:

4Fe + 3O₂ —> 2Fe₂O₃

From the balanced equation above,

4 moles of Fe reacted to produce 2 moles of Fe₂O₃.

Therefore, 6.20 moles of Fe will react to produce = (6.20 × 2)/4 = 3.1 moles of Fe₂O₃

Finally, we shall determine the mass of 3.1 moles of Fe₂O₃. This can be obtained as follow:

Mole of Fe₂O₃ = 3.1 moles

Molar mass of Fe₂O₃ = (56 × 2) + (3×16)

= 112 + 48

= 160 g/mol

Mass of Fe₂O₃ =?

Mass = mole × molar mass

Mass of Fe₂O₃ = 3.1 × 160

Mass of Fe₂O₃ = 496 g

Therefore, 496 g of Fe₂O₃ were produced from the reaction.

The total number of electrons  Al+3. Fe¹3 Mg² Sn¹² Co²Co³ Lit¹ Cr+3,  Rb Pt+2 are 3, 3, 2, 12, 2, 3, 0, 3.0,2 electrons

Electrons are subatomic particles that have a negative charge and are found outside the nucleus of an atom. They orbit the nucleus in shells or energy levels and are involved in chemical bonding and electricity. Electrons are much smaller in size compared to protons and neutrons, which make up the nucleus of an atom.

Al+3 has 10 electrons (13 protons - 3 electrons).

Fe¹3 has 20 electrons (26 protons - 3 electrons).

Mg² has 10 electrons (12 protons - 2 electrons).

Sn¹² has 50 electrons (50 protons - 12 electrons).

Co² has 27 electrons (27 protons - 2 electrons).

Co³ has 26 electrons (27 protons - 3 electrons).

Li¹ has 3 electrons (3 protons - 0 electrons).

Cr+3 has 21 electrons (24 protons - 3 electrons).

Rb¹ has 37 electrons (37 protons - 0 electrons).

Pt+2 has 76 electrons (78 protons - 2 electrons).

Therefore,  The number of electrons in an atom determines its chemical behavior and the way it interacts with other atoms.

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Answer:

In this reaction, Ca(OH)2 is a reducing agent. It reacts with hydrogen chloride to form calcium chloride and water. Therefore, the following reaction shows that matter is neither created nor destroyed in a chemical reaction: Ca(OH)2 + 2HCI -> CaCl2 + 2H20. The formation of calcium chloride and water from the hydrolysis of calcium hydroxide is not an example of matter being created or destroyed in a chemical reaction because it does not involve the breaking down of any bonds between atoms.

Explanation:

Answer: The chocolate has melted, which means it has turn from a solid to a liquid. A liquid has a definite volume but an indefinite shape. Therefore, the correct answer is B.

Priya brought a solid chocolate bar to school to eat as a snack in the afternoon. She left it in her pocket for a few hours. When she took out the chocolate bar to eat it, the bar was was no longer solid. The description that best describes the current state of the chocolate is "The chocolate is now made up of particles packed relatively close together, having an indefinite shape but a definite volume".

There are basically 3 states of matter - Solids, Liquids and gases.

Solid is having definite shape and definite volume, Liquid is having indefinite shape and definite volume and gas is having indefinite shape and indefinite volume.

Liquid and gas states are fluids that can flow easily and their particles are far away from each other.

Water is a liquid, Hydrogen and Oxygen are gases, Ice is a solid.

Given is that Priya left chocolate in her pocket for a few hours. When she took out the chocolate bar to eat it, the bar was was no longer solid.

Therefore, When she took out the chocolate bar to eat it, the bar was was no longer solid. The description that best describes the current state of the chocolate is "The chocolate is now made up of particles packed relatively close together, having an indefinite shape but a definite volume".

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Answer:

1. balanced

2. balanced

3. unbalanced

4. balanced

5. balanced

6. unbalanced

7. balanced

8. unbalanced

Explanation:

The following are categorized into polar or nonpolar molecules:

a) Beryllium chloride (BeCl₂) is a nonpolar molecule. The Be-Cl bond is polar due to the electronegativity difference between beryllium and chlorine, but the molecule is linear with the two polar bonds pointing in opposite directions, resulting in a net dipole moment of zero.

b) Hydrogen sulphide (H₂S) is a polar molecule. The H-S bond is polar due to the electronegativity difference between hydrogen and sulfur, and the molecule has a bent shape, resulting in a net dipole moment that is not zero.

c) Sulphur trioxide (SO₃) is a nonpolar molecule. The S-O bonds are polar due to the electronegativity difference between sulfur and oxygen, but the molecule is trigonal planar with the three polar bonds pointing in different directions, resulting in a net dipole moment of zero.

d) Water (H₂O) is a polar molecule. The H-O bond is polar due to the electronegativity difference between hydrogen and oxygen, and the molecule has a bent shape, resulting in a net dipole moment that is not zero.

e) Trichloromethane (CHCl₃) is a polar molecule. The C-Cl bonds are polar due to the electronegativity difference between carbon and chlorine, and the molecule has a tetrahedral shape, resulting in a net dipole moment that is not zero.

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The Kevlar jacket is only similar to the spiderweb  in the arrangement of atoms in molecules of both substances.

A spider web refers to the tiny web-like structures that is seen around places where spiders breed. On the other hand the Kevlar jacket is known for its high tensile strength.

The Kevlar jacket is only similar to the spiderweb  in the arrangement of atoms in molecules of both substances.

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Answer:

1. A spiderweb and a Kevlar jacket have some obvious differences. Which property is similar between the web and the jacket?

Arrangement of atoms in molecules

2. Assuming silk from spiderwebs could be made just as strong as Kevlar, why would a company still choose to use Kevlar in producing bulletproof fabrics?

The cost might be higher for producing spiderweb silk

3. Which microscopic detail affects the strength of different forms of silk?

Different silk strands have different combinations of amino acids

4. Which type of silk is the strongest?

Major ampullate

5. Which natural source has been bioengineered to make silk proteins?

Goat milk

Explanation:

Answer:

37.36 degrees Celsius

Explanation:

The temperature change of a substance can be calculated using the formula:

ΔT = Q / (m * Cp)

Where:

ΔT is the change in temperature (in degrees Celsius)

Q is the heat added or removed (in calories)

m is the mass of the substance (in grams)

Cp is the specific heat capacity of the substance (in calories per gram per degree Celsius)

For a 60g sample of iron with a specific heat of 0.214 cal/g*C and 2000 calories added to it, the temperature change would be:

ΔT = 2000 / (60 * 0.214) = 37.36 degrees Celsius

Answer:

a

Explanation:

Its a 1/3 chance guess so shoot your shot but positive its a

The density of the iron pyrite cube is 1.343 g/cm³.

Given,

Side of iron pyrite cube = 0.31 cm

Mass of iron pyrite = 0.040 g

The volume of iron pyrite cube = s³ cm³

Or, volume = 0.029791 cm³

We have to find the density of the sample.

Density is defined as the mass per unit volume. Or, it is the ratio of mass to the volume of the substance.

Using the formula for density, we get,

Density = mass/volume

Or, density = 0.40/0.029791

Or, density = 1.343 g/cm³

Hence, the density of the iron pyrite cube is 1.343 g/cm³.

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Answer:Matter is defined as anything that has mass and takes up space (it has volume). ... Volume is the amount of space something occupies. Words such as big, little, long, or short are used to describe volumes.

Explanation:

The volume of hydrogen needed to react with 5.00 L of oxygen based on the mole ratio is 10.00 L.

The volume of hydrogen gas is needed to react with 5.00 L of oxygen is determined from the mole ratio of the reactants as shown in the equation of reaction below:

Equation of reaction:  2 H₂ + O₂ → 2 H₂O

Mole ratio of hydrogen to oxygen = 2 : 1

Moles of gases occupies equal volume

Therefore, Volume ratio of hydrogen to Oxygen = 2 : 1

Volume of hydrogen needed to react with 5.00 L of oxygen = 5.00 * 2

Volume of hydrogen needed to react with 5.00 L of oxygen = 10.00 L

In conclusion, the volume of hydrogen required is obtained from the mole ratio of hydrogen and oxygen in the reaction.

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the possible quantum numbers (ordered n, ℓ, mℓ ) are:Option B.5, 3, -3 and Option C. 4, 3, -2

The quantum numbers n, ℓ, mℓ represent respectively the principal quantum number, the orbital angular momentum quantum number and the magnetic quantum number.

These are the three most important quantum numbers. T

here is another quantum number called the spin quantum number, denoted by ms.

Let's see which of the given quantum number sets is possible.2, 1, 3 is not possible because for ℓ = 1, mℓ can only be -1, 0, or 1. 5, 3, -3 is possible.4, 3, -2 is possible. -4, 3, 1 is not possible.

For any value of ℓ, mℓ must be between -ℓ and +ℓ. e. 2, 1, -2 is not possible because for ℓ = 1, mℓ can only be -1, 0, or 1. f. 3, 2, 2 is not possible because for ℓ = 2, mℓ can only be -2, -1, 0, +1, or +2. g. 3, 3, 1 is not possible because for any value of ℓ, mℓ must be between -ℓ and +ℓ.

Therefore, the possible quantum numbers (ordered n, ℓ, mℓ ) are:5, 3, -34, 3, -2

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In chemistry, drawing chemical structures is a fundamental skill that allows us to communicate and understand chemical concepts.

A chemical structure is a diagram of a molecule or compound that depicts the arrangement of atoms as well as the chemical bonds that hold them together. Depending on the complexity of the molecule and the level of detail required, there are various methods for drawing chemical structures. Lewis structures, line structures, and condensed structures are the most prevalent types of chemical structures.Lewis structures are diagrams that depict a molecule's valence electrons and bonding patterns. To create a Lewis structure, you must first determine how many valence electrons each atom has and then use them to form bonds and fill octets.

When designing Lewis structures, you should additionally consider formal charges, resonance, and electronegativity.Line structures are a method of depicting molecules that is simplified by the use of lines to represent bonds and atoms. In line structures, each vertex or endpoint represents a carbon atom unless otherwise indicated. Hydrogen atoms are not usually shown unless they are attached to a heteroatom. Line structures are useful for quickly drawing and comparing structures, but they do not show the three-dimensional arrangement of atoms.Condensed structures are another way of representing molecules by using symbols and abbreviations to represent atoms and functional groups. In condensed structures, bonds are implied rather than drawn, and atoms are listed in the order of their connectivity.

Condensed structures are useful for representing large and complex molecules, but they can be ambiguous and difficult to read without practice.

Overall, drawing chemical structures is an essential skill in chemistry that requires practice and attention to detail. By learning how to draw Lewis structures, line structures, and condensed structures, you can better understand chemical concepts and communicate your ideas to others.

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Answer:

When dry ammonia is passed over heated sodium in absence of air, the product formed is sodium amide. - When dry ammonia is passed over heated sodium in absence of air, sodium amide is produced. - Sodium amide aka sodamide is mainly used as a strong base in organic chemistry.

Explanation:

These are radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays are in order of increasing frequency and decreasing in wavelength.

In general, the electromagnetic spectrum is divided into seven sections, rising in energy and frequency and decreasing in wavelength. Radio waves, microwaves, infrared (IR), visible light, ultraviolet (UV) light, X-rays, and gamma rays ar names for these types of energy.

The parts of the electromagnetic spectrum are known to as gamma rays, X-rays, ultraviolet radiation, visible light, infrared radiation, and radio waves, from highest to lowest energy.

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