in a reusable resource system, reducibility is independent of the order of reduction! true or false?

Answer:

3.125g/mol

Explanation:

To find the molar mass of the gas, we need to initially find the number of moles (n) contained in the gas. To find the number of moles, we use the general gas law whose equation is:

PV=nRT

Where; P= Pressure

V= Volume occupied by gas

n= number of moles

R= general gas constant

(0.0821 L atm mol/K)

T= absolute temperature

According to the question; P= 2.0atm, V= 2.0L, n= ?, T= 298K

To find n, we make it the subject of the formula:

n= PV/RT

n= 2.0 × 2.0 / 0.0821 × 298

n= 4/ 24.4658

n= 0.16mol

If number of moles (n) of the gas is 0.16mol and it weighs 0.500g, its molar mass can be found using:

number of moles (n) = mass (g) / molar mass

Making MM subject of the formula;

molar mass = mass / number of moles

MM= 0.500/0.16

MM= 3.125

Hence, the molar mass of the gas is 3.125g/mol.

Answer:

\(0.5\: moles\: occupies \: 1 \: litre \\ 4.9 \: moles \: will \: occupy \: ( \frac{4.9}{0.5} ) \: moles \\ = 9.8 \: litres\)

Answer:

B

Explanation:

Alcohol helps break down perfume ingredients. Break down is a close synonym for dissolve. So, B is the correct answer.

Answer:

The correct answer is B

Explanation:

Alcohol makes the perfume dissolve.

The given statement "The point at which indicator undergoes color change is called end point titration. " is True.

The endpoint of a titration is the point at which the indicator being used undergoes a color change, indicating that the reaction between the analyte and the titrant is complete. The choice of indicator depends on the nature of the reaction being studied and the pH range in which the reaction occurs. The indicator is selected such that its color changes at the pH at which the reaction is complete. For example, phenolphthalein is commonly used as an indicator in acid-base titrations because it changes from colorless to pink in the presence of a base, indicating the endpoint of the titration.

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The density of H2O2 gas at 15 °C and 160. 20 kPa is given by formula PV=nRT is 236.40 g/L.

Density is defined as the mass per unit volume of a material under certain temperature and pressure conditions. The gas's density is equal to its mass divided by its volume. If the density of the gas is known, the molar mass of the material may be calculated. Temperature and pressure affect density.

we have,

Temperature = 15 = 15 + 273 = 288 K

And pressure = 160.2 KPa.

PV = nRT

PV = m/mwt x RT

pxmwt/RT = m/V

we know m/v = density

density = 160.20 x 34 / 0.08 x 288

d = 236.40 g/L

Therefore, density of H2O2 gas is 236.40 g/L.

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Answer:

You can calculate joules by calculating the kinetic energy, or energy of motion, of an object. You can also calculate the joules by calculating the amount of work accomplished by a person or machine. Lastly, you can calculate joules by converting directly from a measurement in calories

Dependent variables could be height, number of leaves, biomass, etc. The constants could be the amount of water fed to the plants and other environmental conditions apart from the temperature.

Experimental variables could be independent, dependent, or constant.

Independent variables are supplied by the researcher and are often varied or manipulated to produce different effects on experimental systems or subjects.

Dependent variables are measured. Their values are often affected by whatever independent variable the researcher supplies.

Constant variables are uniform throughout the experimental groups or subjects.

Thus, in this case, the aim is to test the effect of temperature on the growth of a plant. The independent variable is the different temperatures.

The dependent variable would be any feature of the experimental plants that indicate growth. It could the height, the number of leaves, etc.

The constant variable would be other conditions the experimental plants are subjected to.

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Answer:

0.11M

Explanation:

What is the Molarity of a Ca(OH)2 solution if 30.0mL of

the solution is neutralized by 26.4mL of 0.25M HCI solution?

1L (1000 ml) of the HCl contains 0.25 moles of H ion

26.4 ml contains ( 26.4 X0.25/1000) moles of H ion ion

=0.0066 moles H ion

2HCl +Ca (OH)2-----> 2H2O +CaCl2

SO 2 H IONS NEUTRALIZE 1 Ca(OH)2 MOLECULE

00066 moles H ion neutralize 0.0033 moles Ca(OH)2

the 0.0033 moles are distributed over 30 ml, so the concentration of the

Ca(OH)2 IS 0,0033/(30/1000) =0.11 moles/liter or 0.11M

Answer:

75240J

Explanation:

Given parameters:

Mass of water  = 300g

Initial temperature of the water  = 85°C

Final temperature  = 25°C

Unknown:

Amount of heat released = ?

Solution:

The amount of heat released in this cooling process can be calculated using the expression below;

     H  = m x c x (t₂  - t₁)

m is the mass

c is the specific heat capacity of water  = 4.18J/g°C

t is the temperature

  Insert the parameters and solve;

 H = 300 x 4.18 x (25  - 85) = -75240J

The negative symbol denotes heat loss.

Answer:

they all use electric

Explanation:

they plug into things like the light gets screwed into the thing and the rest can plug into the wall

Answer:

they all are are use electricity

Explanation: a light bulb a toaster a radio and a computer all use electricity

Hydrofluoric acid/Formula

______________________

HF

______________________

o0o0o0o0o0o0o0o0o0o0o0

Answer:

Big bang theory

Explanation:

Our universe began with an explosion of space itself - the Big Bang. Starting from extremely high density and temperature, space expanded, the universe cooled, and the simplest elements formed. Gravity gradually drew matter together to form the first stars and the first galaxies.

Answer:

The Big Bang

Explanation:

The Big Bang was the moment 13.8 billion years ago when the universe began as a tiny, dense, fireball that exploded. Most astronomers use the Big Bang theory to explain how the universe began.

Answer:

The material that makes up the substance is a third factor that affects how much thermal energy a sense has.

Answer:

NA = 6.02214076×10^23 mol−1.

Explanation:

1 mole of helium gas contains 6.02 x10^23 helium atoms. So multiply this by 3 after solving the equation.

There are 1.8066 x 10 ^24 atoms in 3 moles of helium

1 mole of any substance is equal to 6.022 × 1023 atoms , This is called the  Avogadro's Number and it represents 12 grams of pure carbon.

Hence,

I mole of Helium = 6.022 × 1023 atoms

Therefore,  

3 moles of helium will be 3 x   6.022 × 1023 atoms

3 moles of helium =1.8066 x 10 ^24 atoms

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Answer:

0.0022 concentration

Explanation:

concentration = moles of solute / liters of solution

first off, convert 125g of potassium sulfate into moles. we can do this using conversion factors. the conversion factor we will use is potassium sulfate's molar mass.

125g K2SO4 * ( 1 mol / 174.259) = 0.720 moles potassium sulfate

then, we follow the concentration formula

0.720 moles potassium sulfate / 325.6 L = 0.0022 concentration

If I were asked to dry fish to make a smoked one, I would place it in a dry and cool place. This is because the process of smoking fish involves first drying it out to remove excess moisture, which helps to preserve the fish and prevents it from spoiling. A dry and cool environment is ideal for this, as it allows the moisture to evaporate slowly without the risk of the fish becoming too warm and potentially spoiling.

On the other hand, a wet and warm environment would be counterproductive, as it would encourage the growth of bacteria and other microorganisms that could spoil the fish before it has a chance to be properly preserved through the smoking process. Therefore, it is important to find a cool and dry location to dry the fish before smoking it, which can include a well-ventilated room or an outdoor area that is protected from direct sunlight and rain.

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During the electrolysis of an aqueous solution of NaBr, water is also present in the solution along with NaBr.

Therefore, the products formed at the electrodes depend on the reduction and oxidation potentials of both the ions present in the solution as well as water.At the cathode (negative electrode), water can be reduced to hydrogen gas (H2) or sodium ions (Na+) can be reduced to sodium metal, depending on their reduction potentials. In this case, the reduction potential of water (-0.83 V) is less than that of Na+ ions (-2.71 V), so water is reduced to hydrogen gas 2H2O + 2e- → H2 + 2OH-At the anode (positive electrode), the Br- ions present in the solution can be oxidized to form Br2 molecules or water can be oxidized to form oxygen gas (O2) and hydrogen ions (H+), depending on their oxidation potentials. In this case, the oxidation potential of Br- (-1.07 V) is greater than that of water (-1.23 V), so Br- ions are oxidized to form Br2 molecules:

2Br- → Br2 + 2e-Therefore, the final products of the electrolysis of NaBr solution are hydrogen gas (H2) at the cathode and bromine gas (Br2) at the anode.

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Answer:

Explanation:

Here, we want to get which of the compounds have the highest percentage by mass of nitrogen

What we have to do here is to divide the mass of nitrogen atoms in the compound by the molecular mass of the compound

a) NH3

The atomic mass of nitrogen is 14 amu, the atomic mass of hydrogen is 1 amu

The molar mass is thus 14 + 3(1) = 17 g/mol

The percentage by mass of nitrogen will be

14/17 * 100 = 82.35 %

b) HCN

The atomic mass of carbon is 12 amu

Thus, we have the molar mass as

1 + 12 + 14 = 27 g/mol

Percentage of nitrogen by mass will be : 14/27 * 100 = 51.85 %

c) For N2O

The atomic mass of oxygen is 16 amu

The molar mass of the compound will be 14(2) + 16 = 44 g/mol

Percentage of nitrogen by mass will be = 28/44 * 100 = 63.64 %

d) NI3

The atomic mass of iodine is 127 g/mol

So the molar mass of the compound will be:

14 + 3(127) = 395 g/mol

Percentage by mass of nutrogen will be

14/395 * 100 = 3.54 %

From what we have, the highest percentage by mass of nitrogen is 82.35 % and that belongs to ammonia (NH3)

The equation 2H2O ⇌ H3O+ + OH- represents the self-ionization of water, where water molecules can react with each other to form hydronium ions (H3O+) and hydroxide ions (OH-).

If H3O+ is added:

Adding hydronium ions (H3O+) will shift the equilibrium to the left, favoring the reverse reaction. This means more water molecules will combine to form H2O, reducing the concentration of H3O+ ions.

If H3O+ is taken away:

Removing hydronium ions (H3O+) will shift the equilibrium to the right, favoring the forward reaction. This means more water molecules will ionize to form H3O+ ions to compensate for the loss.

If OH- is added:

Adding hydroxide ions (OH-) will shift the equilibrium to the left, favoring the reverse reaction. This means more water molecules will combine to form H2O, reducing the concentration of OH- ions.

If OH- is removed:

Removing hydroxide ions (OH-) will shift the equilibrium to the right, favoring the forward reaction. This means more water molecules will ionize to form OH- ions to compensate for the loss.

In summary, adding or removing H3O+ or OH- ions will cause the equilibrium to shift in order to maintain the balance of concentrations and satisfy the equilibrium expression.

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Answer:

PLEASE MARK ME AS THE BRAINLIEST

Explanation:

According to the 2n2 rule, the maximum number of electrons in the third period = 2 x (3)2 = 18. But, the last shell cannot accommodate more than 8 electrons so, the number of electrons in third period is 8. Hence, the number of elements is also 8.

The statement "Mutations always occur in the coding sequence of genes" is NOT TRUE regarding the effects of mutations in genetics.

Mutations can occur in different regions of the gene, not just in the coding sequence. While mutations in the coding sequence can lead to changes in the protein's structure and function, some mutations occur in other regions, such as the regulatory regions or non-coding regions of the gene. These non-coding mutations can still have significant effects on gene expression and regulation.

Loss-of-function mutations are usually recessive, meaning that both copies of the gene need to have the mutation for the phenotype to be affected. Gain-of-function mutations, on the other hand, are usually dominant, meaning that even one copy of the mutated gene can lead to a change in phenotype.

Some mutations can indeed be lethal, particularly if they disrupt essential genes or critical cellular processes. These mutations can have severe consequences on the organism's development, survival, or overall health.

In summary, while mutations in the coding sequence of genes can have significant effects, it is not true that mutations always occur in this specific region. Mutations can occur in various parts of the gene, and their effects depend on factors such as the type of mutation, the location of the mutation, and the interaction with other genes and environmental factors.

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Answer:

3fe s )+ 4h2o G )= fe3o4 s )+ 4h2 G

Explanation: 3Fe(s) + 4H2O(g) → Fe3O4(s) + 4H2(g) (i) Iron metal is getting oxidised. (ii) Water is getting reduced. (iii) Water is acting as reducing agent.

Explanation:

i make a search

Answer:3,4,1,2

Explanation:

hope this helped

1s22s22p44d2 this may be answer

Answer:

1s²2s²2p⁶

Explanation:

...................

Answer:The tilt of the Earth's axis also defines the length of daylight. Daylight hours are shortest in each hemisphere's winter. Between summer and winter solstice, the number of daylight hours decreases, and the rate of decrease is larger the higher the latitude. The fewer sunlight hours the colder the nights

Explanation: That's a answer for you.

The law of conservation of matter, also known as the law of conservation of mass,  can not be creastates that in a unrestricted system, the total mass of the system remains constant or destroyed.

This means that during any physical or chemical process, the total mass of the reactants must be equal to the total mass of the products. The law of conservation of matter is particularly applicable to chemical responses involving oxygen, hydrogen, and carbon  patches.

These  patches are generally set up in organic  composites and are involved in  numerous important chemical responses. the law of conservation of matter is essential for understanding and  prognosticating the issues of chemical responses, particularly those involving oxygen, hydrogen, and carbon  patches.

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Answer:

B

Explanation:

Calorimetry is the scientific study of the transformation of heat energy. A calorimeter is a device that is used to conduct these types of experiments. It is used to determine the heat transfer that occurs between two bodies that are at different temperatures.In the given problem, a piece of gold with a mass of 15.23 g and an initial temperature of 54 °C was dropped into a calorimeter that contains 28 g of water.

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Answer:

C) sometimes

Explanation:

No; only a small percentage of mutations cause genetic disorders—most have no impact on health or development. For example, some mutations alter a gene's DNA sequence but do not change the function of the protein made by the gene

Outgoing shortwave radiation depends on factors such as the angle of the Sun's rays, albedo, cloud cover, and atmospheric gases. These factors collectively determine the amount of solar radiation that is reflected, absorbed, and re-emitted by the Earth's surface, influencing the outgoing shortwave radiation.

Outgoing shortwave radiation depends on several factors. Firstly, it is influenced by the solar radiation received by the Earth's surface. The amount of solar radiation reaching the Earth is determined by the angle of the Sun's rays, which changes throughout the day and across different seasons. This means that outgoing shortwave radiation will vary depending on the time of day and the time of year.

Another important factor is the albedo, which refers to the reflectivity of different surfaces on Earth. Surfaces with high albedo, such as ice and snow, reflect more solar radiation back into space, resulting in lower outgoing shortwave radiation. Conversely, surfaces with low albedo, such as dark soil and vegetation, absorb more solar radiation, leading to higher outgoing shortwave radiation.

The presence of clouds also plays a role in outgoing shortwave radiation. Clouds can either reflect incoming solar radiation back into space or absorb and re-emit it as longwave radiation. The type and thickness of clouds, as well as their altitude, can affect the amount of outgoing shortwave radiation.

Finally, atmospheric gases such as water vapor, carbon dioxide, and ozone can also influence outgoing shortwave radiation. These gases absorb and re-emit some of the incoming solar radiation, impacting the amount of radiation that escapes back into space.

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