When washing items in the detergent solution when do you replace the water.

Answer:

To solve this problem, we can use the combined gas law, which relates the pressure, volume, and temperature of a gas:

(P1V1)/T1 = (P2V2)/T2

where P1, V1, and T1 are the initial pressure, volume, and temperature of the gas, and P2, V2, and T2 are the new pressure, volume, and temperature of the gas.

We are given:

P1 = 110 kPa

V1 = 2.00 L

T1 = 30.0°C = 303.15 K

We need to find V2, given:

P2 = 440 kPa

T2 = 80.0°C = 353.15 K

Substituting these values into the combined gas law equation, we get:

(110 kPa)(2.00 L)/(303.15 K) = (440 kPa)(V2)/(353.15 K)

Solving for V2, we get:

V2 = (110 kPa)(2.00 L)(353.15 K)/(303.15 K)(440 kPa) = 1.55 L

Therefore, the new volume of the gas is 1.55 L.

Answer:

43 g N₂

Explanation:

To find the mass of N₂ required, you need to (1) convert grams H₂ to moles H₂ (via molar mass), then (2) convert moles H₂ to moles N₂ (via mole-to-mole ratio from equation coefficients), and then (3) convert moles N₂ to grams N₂ (via molar mass). It is important to arrange the conversions in a way that allows for the cancellation of units. The final answer should have 2 sig figs to match the amount of sig figs of the given value.

Molar Mass (H₂): 2(1.008 g/mol)

Molar Mass (H₂): 2.016 g/mol

Molar Mass (N₂): 2(14.009 g/mol)

Molar Mass (N₂): 28.018 g/mol

1 N₂(g) + 3 H₂(g) -----> 2 NH₃(g)

9.3 g H₂           1 mole             1 mole N₂             28.018 g
--------------  x  ----------------  x  --------------------  x  ------------------  =  43 g N₂
                        2.016 g            3 moles H₂            1 mole

Answer:

b

Explanation:

The Theoretical temperature ie, Absolute Zero is when "All particles in a sample can never all be moving at once." Hence, Option (A) is correct

What is Absolute Zero temperature ?

It is determined by  ideal gas law;  absolute zero is taken as −273.15 degrees on the Celsius scale (International System of Units), which equals −459.67 degrees on the Fahrenheit scale.

Absolute zero is the lowest limit of the thermodynamic temperature scale, a state at which the enthalpy and entropy of a cooled ideal gas reach their minimum value, taken as zero kelvin.

The fundamental particles of nature have minimum vibrational motion, retaining only quantum mechanical, zero-point energy-induced particle motion.

According to the laws of thermodynamics,

Absolute zero cannot be reached using only thermodynamic means, because the temperature of the substance being cooled approaches the temperature of the cooling agent asymptotically and a system at absolute zero still possesses quantum mechanical zero-point energy, the energy of its ground state at absolute zero.

The kinetic energy of the ground state cannot be removed.

Therefore,

The theoretical temperature ie, Absolute Zero is when "All particles in a sample can never all be moving at once." Hence, Option (A) is correct

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The element belongs to the second group of the periodic table.

four ionization energies of the element are 738, 1450, 7730, and 10550 kJ mol¹ .

We can see that, there a large increase in the 3rd ionization energy. Which indicates that below the electrons removed by third and fourth ionization energy is considered as core electrons, and the first two electrons is considered as valence electrons.

So the valency of this element is 2,which indicates that it belongs to the second group of the periodic table and are known as Alkaline earth metals, with the outermost configuration ns2.

The second-most reactive metals in the periodic table are the alkaline earth metals, which include radium, barium, strontium, calcium, and beryllium. They have low electronegativity, low electron affinity, and low ionization energy. They are good electrical conductors and have an oxidation state of +2.

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Answer: 137.76 g

Explanation:

The thermal conductivity of air is approximately k = AΔT / Q, where A is the area, ΔT is the temperature difference, and Q is the power input.

To measure the thermal conductivity of air using the apparatus used in the conduction of gases and liquids experiment, follow these steps:

Set up the apparatus: Arrange the experimental setup, including a heat source, a temperature sensor, and a sample chamber containing air. Ensure that the apparatus is properly insulated to minimize heat loss.

Measure the power input: Set the power source to 15 W and record this value as Q. This represents the amount of heat energy being supplied to the system.

Measure the temperature difference: Place the temperature sensor in the sample chamber and record the initial temperature, T1. Then, allow the system to reach a steady state and record the final temperature, T2. Calculate the temperature difference as ΔT = T2 - T1.

To determine the thermal conductivity of air, use the formula k = AΔT / Q. Substitute the known values of power input (Q = 15 W) and temperature difference (ΔT) into the equation. The area (A) is a characteristic of the specific experimental setup and needs to be determined based on the geometry and dimensions of the sample chamber.

By performing these steps and plugging the values into the formula, you can calculate the thermal conductivity of air in units of W/m·K.

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Pi bonds are formed when two unhybridized p orbitals overlap, which means there are a total of 16 pi bonds (32/2).
Therefore, the answer is: 32 sigma bonds and 16 pi bonds.

Based on the given molecule, there are a total of 16 oxygen (O) atoms. Each oxygen atom is bonded to two other atoms, which means there are a total of 32 single (sigma) bonds (16 x 2) in the molecule.
Next, we need to determine the number of pi (π) bonds. Pi bonds are formed when two atoms share electrons in the unhybridized p orbital. To calculate the number of pi bonds, we need to determine the number of unhybridized p orbitals in the molecule.
In the given molecule, each oxygen atom is also bonded to two other oxygen atoms, which means there are a total of 32 oxygen-oxygen bonds. Oxygen has six valence electrons, so each oxygen atom in the molecule has two lone pairs of electrons and two sigma bonds. This leaves two unhybridized p orbitals available for pi bonding. Since there are 16 oxygen atoms in the molecule, there are a total of 32 unhybridized p orbitals.
Pi bonds are formed when two unhybridized p orbitals overlap, which means there are a total of 16 pi bonds (32/2).
Therefore, the answer is: 32 sigma bonds and 16 pi bonds.

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We need the structure (Refer to the attachment)

Answer:

A heat engine is a type of engine, (like the motor in a car) that produces ... Heat engines do just the opposite; they take the energy from being warm ... using a flame to heat water into steam, then using the steam to turn a turbine. ... is the percentage of energy input that the engine can convert to useful work.

Explanation:

hope this helps

and i hope its right

Answer:

It will double

Explanation:

Given;

From the ideal gas equation;

PV = nRT

P=nRT/V

where;

P = pressure of the gas

n= number of moles of the gas

V= volume of the gas

R = the gas constant

T= absolute temperature of the gas

If V is halved when n and T remain the same

P2 = nRT/V/2

P2 = nRT * 2/V

P2 = 2nRT/V

Hence the pressure is doubled.

Answer:

A) It will double

Explanation:

...

The activation energy denoted by Ea is referred to as the minimum energy or the threshold energy required for a reaction to occur. When reactant molecules overcome the repulsion energy resulting in the collision of outer electrons by optimum kinetic energy. Higher the activation energy more easy for the reaction to take place.

When comparing two similar chemical reactions, the reaction with the smaller activation energy (Ea) because the activation energy is lower, the transition of the reactant molecules into the product species requires less energy. Accordingly, the pace of the response will be higher.

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Answer:

0 being the lowist 14 being the hieist 0 is the most acidic 14 is the hieist base 7 is nutrol

Explanation:

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14

Answer:

by determining or looking up the electron configurations of the main group elements.

Explanation:

The valence electrons participate in chemical reactions. ... You can also find the core and valence electrons by determining or looking up the electron configurations of the main group elements.

When ice partially melts, the resulting water has the same chemical composition as the ice because ice is a pure substance. However, when rocks partially melt, the resulting magma is not a pure substance, but rather a mixture of various minerals that have different melting points.

As the rock begins to melt, the minerals with the lowest melting points will melt first, leading to a change in the chemical composition of the remaining solid rock. This change in composition can result in the production of magma with a different composition than the source rock.

Additionally, the process of partial melting can also cause the separation of different minerals within the source rock, further altering the composition of the resulting magma. Therefore, while partial melting of ice and rocks both involve melting a substance, the resulting products can have vastly different compositions due to differences in the nature of the substances being melted.

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Answer:

I believe it's either D or A I did it in my math

Answer:

The change from a liquid phase to a gaseous phase.

so the answer would be it changed to a gaseous phase

---------------

This is what occurs when the vapor pressure of the liquid is equal to the atmospheric pressure exerted on the liquid.

Volume (in L) of Carbon dioxide : 23.6 L

Avogadro's hypothesis:  

In the same T,P and V, the gas contains the same number of molecules  

So the ratio of gas volume will be equal to the ratio of gas moles  

\(\tt \dfrac{V_1}{n_1}=\dfrac{V_2}{n_2}\)

Combustion of ethane :

\(\tt 2C_2H_6+7O_2\Rightarrow 4CO_2+6H_2O\)

mol ratio of C₂H₆ : CO₂ ⇒ 2 : 4

so the volume of CO₂ :

\(\tt \dfrac{V_1}{n_1}=\dfrac{V_2}{n_2}\\\\\dfrac{11.8}{2}=\dfrac{V_2}{4}\\\\V_2=\boxed{\bold{23.6~L}}\)

Answer:

23.6

Explanation:

If 89.5 grams of silver is produced, 105.45 grams of Cu reacted.

The Chemical equation is

Cu + 2AgNO₃ → Cu(NO₃)₂ + 2Ag

The equation is balanced,

89.5 grams of Silver is produced in the reaction.

It is asked that how much Cu will be produced.

The amount of Copper can be calculated by using mole concept,

From the reaction,

When 1 moles of Copper Reacts, 2 moles of Ag are formed.

So, we can say,

Mole of Cu (n) = 2 x Moles of Ag

Mole of a compound can be found by using the formula,

Moles = Given mass of compound/Molar mass of the compound

So,

n = 2 x 89.5/107.87  moles

n = 2 x 0.82 moles

n = 1.64 moles.

Moles of Copper are 1.64.

So, the mass of Cu reacted will be

1 mole Cu = 63.55 grams

1.64 moles Cu = 1.64 x 63.55 grams

1.64 moles of Cu = 105.45 grams.

To produce 89.5 grams of silver, 105.45 grams of Copper would have reacted.

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Answer:

84.313 g/mol

Explanation:

Magnesium Carbonate molecular weight. Molar mass of MgCO3 = 84.313 g/mol.

Wine was produced 37 years ago (1984 as usual year 15,2021) that is shown in the calculations below.

Reaction rate is calculated using the formula rate = Δ[C]/Δt, where Δ[C] is the change in product concentration during time period Δt. The rate of reaction can be observed by watching the disappearance of a reactant or the appearance of a product over time.

The time can be represented as follows:

t= 2.303\∧ log A0/A

∧= 0.693/t 1/2

The rate of a reaction is proportional to the reciprocal of the time taken. Rate α 1 time Rate is inversely proportional to time. Units: s-1, min-1 etc.

The given parameters are as follows:

t1/2=12.3

A0=5.5

A=0.688

t= 2.303/(0.693/12.3) log (5.5/0.688)

t=36.9

t=37 years

Thus, wine was produced 37 years ago (1984 as usual year 15,2021)

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The entropy change for a particle in this gaseous system is negative and given by -k ln(2.404). This means that the system becomes less disordered as a result of the change in temperature and volume.

The entropy change for a particle in this gaseous system can be calculated using the Boltzmann entropy formula:

S = k ln(W)

where S is the entropy, k is the Boltzmann constant, and W is the number of microstates.

Since the final number of microstates is 0.418 times that of the initial number of microstates, we can write:

W_final = 0.418 * W_initial

Taking the natural logarithm of both sides, we get:

ln(W_final) = ln(0.418) + ln(W_initial)

Substituting this into the entropy formula, we have:

S_final - S_initial = k ln(W_final) - k ln(W_initial)

= k [ln(0.418) + ln(W_initial)] - k ln(W_initial)

= - k ln(2.404)

Therefore, the entropy change for a particle in this gaseous system is negative and given by -k ln(2.404). This means that the system becomes less disordered as a result of the change in temperature and volume.

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The electronegativity periodic table is a chart that arranges elements according to their electronegativity, which is a measure of an atom's ability to attract electrons to itself. Electronegativity is a chemical property that reflects the relative tendency of an atom to draw electrons towards itself when it forms a chemical bond with another atom.

The electronegativity values are usually determined using the Pauling scale, which was developed by Linus Pauling and is widely used in chemistry. In this scale, the electronegativity of an element ranges from 0.7 for cesium to 4.0 for fluorine, with increasing electronegativity moving from left to right across a period and increasing as one moves down a group.

The electronegativity values can be useful in understanding chemical bonding and the behavior of molecules. For example, elements with high electronegativity values tend to form ionic bonds, while elements with low electronegativity values tend to form covalent bonds. Additionally, the electronegativity difference between two bonded atoms determines the type of bond, with larger differences indicating polar covalent bonds and smaller differences indicating nonpolar covalent bonds.

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In the single-displacement reaction between zinc and hydrochloric acid solution, the temperature typically increases, and the pressure may also increase.

When zinc (Zn) is added to a hydrochloric acid (HCl) solution, a chemical reaction takes place. The zinc reacts with the hydrochloric acid to form zinc chloride (ZnCl2) and hydrogen gas (H2). This reaction is exothermic, meaning it releases heat energy.

The release of heat energy during the reaction causes an increase in temperature in the immediate vicinity of the reaction mixture. The temperature rise can be observed by measuring the temperature of the solution or feeling the container if it is not insulated.

As the reaction proceeds, hydrogen gas is produced. If the reaction takes place in a closed container, such as a sealed flask or test tube, the production of gas can lead to an increase in pressure within the container. The pressure increase is a result of the accumulation of gas molecules in a confined space.

It is important to note that the magnitude of the temperature and pressure changes depends on the specific conditions of the reaction, such as the concentration of the acid and the amount of zinc used. The reaction rate and extent of temperature and pressure changes can be influenced by various factors, including the reaction vessel size, presence of catalysts, and reaction stoichiometry.

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It is clear from the tabular data that, the monkeys in troop 2 were better to avoid predators and more of them  were able to reproduce. Hence, option D is correct.

In the biosphere, not all living things are fit to survive for a longer life time. Most of them are pray of other higher level animals. Some organisms adopt some strategies to hide from their predators and they can survive more.

It is clear from the table that, the monkeys residing in the ground are more prone to the attacks by their predators. Whereas monkeys living in trees can survive more.

In each year the survival rate is increasing for both troop. However the more number of monkeys which can sustain their population is in troop 2. Therefore, option D is correct.

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Answer:

C

Explanation:

d=300

t=6hr

speed=?

speed=300/6

speed=50m/hr the important thing in this question is to get the right units

Answer:

  802.69 g

Explanation:

The molar mass of Barium nitrite is 229.34 g/mol, so 3.5 moles of it will have a mass of ...

  3.5 mol × 229.34 g/mol = 802.69 g

The name of the compound CH₃CHOOH is acetic acid.

The International Union of Pure and Applied Chemistry (IUPAC) names organic compounds according to chemistry rules.

To locate the longest carbon chain, there are various requirements to follow, such as finding the functional group.

Thus, the name of the compound CH₃CHOOH is acetic acid.

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Answer:

Frequency

Explanation:

I do not see the options but I know the answer:

The frequency of a sound wave is what your ear understands as pitch. A higher frequency sound has a higher pitch, and a lower frequency sound has a lower pitch.

If you find my answer helpful

Pls consider marking my answer as Brainliest! It would mean a lot!

Answer:

frequency

Explanation:

vaild

To produce 35.5g of H2, approximately 2055.49g of NaCl is required.

To calculate the mass of NaCl required to produce 35.5g of H2, we need to determine the stoichiometry of the reaction and use the molar mass of NaCl.

The balanced equation for the reaction is:

2NaCl + 2H2O -> 2NaOH + H2

From the balanced equation, we can see that for every 2 moles of NaCl, 1 mole of H2 is produced. We can use the molar mass of H2 (2.016g/mol) to convert the given mass of H2 into moles:

moles of H2 = mass of H2 / molar mass of H2

moles of H2 = 35.5g / 2.016g/mol

moles of H2 = 17.6 mol

Since the stoichiometry of the reaction is 2 moles of NaCl to 1 mole of H2, we can set up the following ratio:

moles of NaCl / moles of H2 = 2 / 1

Rearranging the equation to solve for moles of NaCl:

moles of NaCl = (moles of H2 * 2) / 1

moles of NaCl = (17.6 mol * 2) / 1

moles of NaCl = 35.2 mol

Now, we can calculate the mass of NaCl required using the molar mass of NaCl (58.44g/mol):

mass of NaCl = moles of NaCl * molar mass of NaCl

mass of NaCl = 35.2 mol * 58.44g/mol

mass of NaCl = 2055.49g

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Answer:

A) form when lava and magma cool

please give me brainliest :p

God bless!

Answer:

A: form when lava and magma cools

Explanation:

Got it right on Edge 2020 :)