calculate the mass percent (m/m) of a solution prepared by dissolving 47.54 g of nacl in 174.6 g of h2o .

Answer:

A reaction rate can be calculated using a pretty simple procedure.A reaction rate must be calculated from tabulated values or discovered empirically because it depends on change over time.

Describe how a sample experiment might be used to determine the ordering with respect to two different reactants?

     aA+bB→cC+dD

      (14.2.1)

    Also possible to write as:

      response rate = 1a

   (A's disappearance rate)

   = −1b

 (B's disappearance rate

 = 1c

  (C's rate of formation)

  = 1d\s(rate of production of D) (rate of formation of D)

The following is the general example of the distinct average rate of           reaction

 response rate = 1CR1[R1

Δt=⋯=−1CRnΔ[R

 Δt=1CP1Δ[P1]

 Δt=⋯=1CPnΔ[Pn]

 Δt    

  To learn more about rate of reaction refer

   https://brainly.com/question/24795637#

   #SPJ13

If the human population continues to increase, it is likely that the demand for freshwater resources will also increase, which could have a significant impact on global water distribution. As more people use freshwater resources for drinking, sanitation, agriculture, and industrial purposes, there may be greater competition for limited water supplies.

One potential consequence of this increased demand could be that some regions experience water scarcity, while others have an abundance of water. This could lead to conflicts over water resources, as countries and communities compete for access to freshwater sources. In addition, as demand for freshwater increases, there may be a greater risk of pollution and degradation of freshwater resources, further exacerbating water scarcity and potentially affecting the health and wellbeing of communities that rely on these resources.

To address these challenges, it will be important to prioritize sustainable water management practices, including water conservation, watershed protection, and water recycling. This may involve investing in infrastructure to improve water distribution and storage, as well as promoting policies that encourage more efficient water use. Additionally, greater cooperation and coordination between countries and communities will be essential to ensure that water resources are shared fairly and sustainably.

Overall, as the human population continues to grow, it will be critical to prioritize the responsible management and conservation of freshwater resources to ensure that they are available to meet the needs of current and future generations.

Answer:

As the human population continues to increase, the demand for freshwater resources will also rise. With more people using water, the global water distribution could be affected in several ways:

Water scarcity: As the demand for water increases, there could be a shortage of freshwater resources, leading to water scarcity in certain regions. This could have a significant impact on agriculture, energy production, and human health.

Water pollution: With more people using water resources, the chances of water pollution could also increase. Pollution can come from various sources, including industrial waste, agricultural runoff, and sewage. The contamination of freshwater resources can affect the availability of safe drinking water.

Conflict over water resources: Water is a precious resource, and as its scarcity increases, there is a risk of conflict over its distribution. This could lead to tensions between countries or even within countries, as people compete for access to freshwater resources.

Increased pressure on water infrastructure: As the demand for water increases, there will be increased pressure on water infrastructure, including dams, pipelines, and treatment plants. This could lead to issues such as inadequate water supply, water leaks, and higher water bills.

To mitigate these potential problems, it is essential to manage water resources sustainably. This includes reducing water waste, promoting water conservation, investing in water infrastructure, and using water resources efficiently. It is also important to prioritize the needs of vulnerable communities and ensure that everyone has access to safe drinking water.

It is more effective to perform an extraction with several small portions of solvent as opposed to one large portion of solvent of equal volume because the amount of the material left in the trash will be less.

The extraction of certain ratio of the solute is able to the distribute among the phases during each extraction. The various extractions with the lesser amounts of the solvent are more efficient than the single extraction with the huge amount of solvent.

The extraction is about to maximize the outside field of the communication between the two solvents, we can easily get the more surface area in the contact with the fewer amounts.

To learn more about extraction here

https://brainly.com/question/14522836

#SPJ4

In order to determine where testing of tornado warning systems would be most effective in the United States, it is important to understand the areas of the country that are most prone to tornadoes.

The Midwest region is known as "Tornado Alley" due to its high frequency of tornadoes, particularly in states such as Oklahoma, Kansas, and Texas. However, the northeast and mid-Atlantic regions also experience tornadoes, although less frequently. The pacific northwest and West regions are not as prone to tornadoes but still experience them on occasion.

Based on this information, it would make sense for the national government to focus testing efforts on the Midwest region, particularly in areas where tornadoes are most frequent. This could help improve warning systems and potentially save lives in areas where tornadoes are a common occurrence. However, it is also important for warning systems to be effective in all regions of the country where tornadoes may occur, so testing in other regions should not be neglected. Ultimately, the goal should be to improve warning systems nationwide in order to better protect people from the dangers of tornadoes.

To know more about tornados visit:

https://brainly.com/question/17341818

#SPJ11

Five substances have covalent bonds: hydrogen (H2), oxygen (O2), nitrogen (N2), water (H2O), and methane (CH4).

An illustration would be "Water, H2O," which is created when hydrogen and oxygen share electrons (which are both non-metals). Carbon dioxide, CO2, is another example of a covalent bond.

A covalent bond is defined by Lewis as a shared electron pair. In hydrogen chloride, a hydrogen atom and a chlorine atom create the following bond: The shared electron pair between the hydrogen and chlorine ions is shown as a line in a Lewis structure of a covalent molecule. Molecular compounds are another name for covalent compounds. Organic substances like lipids, proteins, nucleic acids, and carbohydrates

To learn more about covalent  please click on below link

https://brainly.com/question/30261436

#SPJ4

Answer:

3.15×18

56.7

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

The correct statement about specific heat capacity is " the quantity of heat that is required to raise 1 g of the sample by 1°C (Kelvin) at a constant pressure".

The heat capacity of a given sample of a substance divided mostly by the mass of the sample, also known as mass heat capacity, is the specific heat capacity of that substance.

Heat is the energy transmitted from one body to the other as a result of a temperature differential. When two bodies of different temperatures collide, energy is transmitted.

Therefore, the quantity of heat that is required to raise 1 g of the sample by 1°C (Kelvin) at a constant pressure is correct statement.

To know more about heat and specific heat capacity.

https://brainly.com/question/13860901

#SPJ2

Answer: D. the quantity of heat that is required to 1 g of the sample 1°C (Kelvin) at a constant pressure

Explanation:

Specific heat capacity is defined as the quantity of heat required to raise the temperature of one gram of a substance by one degree Celsius (Kelvin) at a constant pressure.

It is dependent on temperature, especially for gases, and is related to intermolecular forces. The higher the specific heat of a substance, the more energy is needed to raise the temperature of the substance.

You can multiply this value by the mass of a given substance (g) and the change in temperature (degC) to find the amount of heat gained or lost (Joules).

The heat required to raise the temperature of 8.75 g of water from its melting point to its boiling points is 3.662 kJ.

The amount of heat required to increase the temperature of one gram of a material by one degree Celsius (°C) is defined as specific heat.

The equation q = mcΔt can be used to compute the amount of heat acquired or lost by a specific heat (q), where m is the mass of the sample, c is the specific heat, and Δt is the temperature change.

Given:

m = 8.75

c = 4.186 J/g°C

The melting point and boiling point of water is 0° and 100° respectively.

Δt = 100° - 0° = 100°

We know that,

q = mcΔt

  = 8.75(4.186)100

  = 3.662 kJ

Thus, the heat required to raise the temperature of 8.75 g of water from its melting point to its boiling points is 3.662 kJ.

Learn more about specific heat here:

https://brainly.com/question/21406849

#SPJ9

Answer: temperature, Stp

Explanation:

The calculation for standard temperature and pressure has been referred to as STP.

The mass-volume and volume-mass, has been the measurement of the concentration of the solution.

The mass-volume has been the measurement of mass of sample in the volume of solution. The volume by mass has been the measurement of the volume of solute to mass of solution.

The measurement has been performed with the standard conditions of temperature and pressure.

The standard temperature has been 273.5 K and standard pressure has been 1 atm. These temperatures and pressure has been referred to as STP.

Thus, the calculation for standard temperature and pressure has been referred to as STP.

Learn more about standard conditions, here:

https://brainly.com/question/2142674

There are 3.88 * 10²⁴ atoms of potassium in 2.15 moles of potassium phosphate.

The formula of potassium phosphate is K₃PO₄ and the formula of potassium is K.

1 mole of potassium phosphate contains 3 moles of Potassium atoms

2.15 moles of potassium phosphate contains 2.15 * 3 moles of Potassium atoms

2.15 moles of potassium phosphate contains 6.45 moles of Potassium atoms

Number of atoms in 6.45 moles of potassium atom = 6.45 * 6.02 * 10²³

Number of atoms in 6.45 moles of potassium atom = 3.88 * 10²⁴ atoms

Therefore, there are 3.88 * 10²⁴ atoms of potassium in 2.15 moles of potassium phosphate.

Learn more about atoms and moles at: https://brainly.com/question/15356425

Answer:

Fossil fuels cause local pollution where they are produced and used, and their ongoing use is causing lasting harm to the climate of our entire planet. Nonetheless, meaningfully changing our ways has been very difficult.

Using the given mass of the compound (0.520 g) and the calculated moles, we can determine the molar mass of the compound.

To find the molar mass of the compound, we can use the formula:

ΔT = Kf * m

where ΔT is the freezing point depression, Kf is the cryoscopic constant (in this case, 3.90 °C/m), and m is the molality of the solution.

First, we need to calculate the molality (m) of the solution:

m = moles of solute / mass of solvent (in kg)

The mass of the solvent (lauric acid) is given as 4.62 g. Since the unknown compound is a solute, we need to convert its mass to moles:

moles = mass / molar mass

Given that the mass of the unknown compound is 0.520 g, we can now calculate the moles of the compound.

Next, we convert the mass of the solvent to kg by dividing by 1000:

mass of solvent (lauric acid) = 4.62 g / 1000 = 0.00462 kg

Now we can calculate the molality:

m = moles of solute / mass of solvent = (moles of the compound) / (mass of solvent)

Finally, we can use the freezing point depression formula to find the molar mass of the compound:

ΔT = Kf * m

Substituting the given values:

4.20 °C = 3.90 °C/m * m

Now solve for m:

m = (4.20 °C) / (3.90 °C/m)

Once we have the molality, we can calculate the moles of the compound:

moles = molality * mass of solvent (in kg)

Finally, we calculate the molar mass:

molar mass = mass of solute / moles of solute

Learn more about molar mass here :-

https://brainly.com/question/31545539

#SPJ11

Answer:

4 ClO-

Explanation:

Bond length ∝ 1/ Bond order

Bond order of ClO − =1,

Bond order of ClO 2− =1.5,

Bond order of ClO 3− =1.66 ,

Bond order of ClO 4− =1.75.

Thus the order of bond length is

ClO 4− <ClO3− <ClO2−

<ClO −

The relationship between pH, pOH, and the concentration of hydroxide ions in a solution is given by:

pH + pOH = 14

If a solution has a pOH of 7.39, we can find its pH by subtracting the pOH from 14:

pH = 14 - pOH

pH = 14 - 7.39

pH = 6.61

Therefore, the solution has a pH of 6.61.

The pH scale, which describes the connection between pH, pOH, and the quantity of hydroxide ions, is an essential concept in chemistry. A pH of 7 is regarded as neutral, whereas values below 7 are acidic and those over 7 are basic (also called alkaline).

learn more about , pOH here:

https://brainly.com/question/480457

#SPJ4

Answer:

35g

Explanation:

Answer:

35 grams is bigger

Explanation:

grams= 1

centigrams= .01

Answer:

Explanation:

Molecular weight of Al: 27

Molecular weight of O: 16

Percentage composition of Al by weight in Al2O3

= (27*2) / (27*2 + 16*3)

= 0.5294

In 200 grams of Al2O3, there are

= 200*0.5294

= 105.88 grams of Al

77.18 grams of Al was produced in the experiment.

Percent yield for the experiment

= product mass / reactant mass * 100%

= 77.18 / 105.88 * 100%

= 72.89%

Ten different pollinators plants or trees or flowers are Bee balm, Black-eyed Susan, Butterfly weed, Coneflower, Lavender, Milkweed, Redbud tree, Sunflower, Wild rose, and Zinnia.

Pollinator plants are known as plants that attract and support pollinators, such as bees, butterflies, birds, and other insects or animals. The pollinators they attract help transfer pollen from one flower to another.

When pollinators tranfer pollens, they facilitate the fertilization and reproduction of flowering plants.

Find more exercises on pollinator plants;

https://brainly.com/question/21076663

#SPJ1

Answer:

(i) specific heat

(ii) latent heat of vaporization

(iii) latent heat of fusion

Explanation:

i. Q = mcΔT; identify c.

Here, Q is heat, m is the mass, c is the specific heat and ΔT is the change in temperature.

The amount of heat required to raise the temperature of substance of mass 1 kg by 1 degree C is known as the specific heat.  

ii. Q = mLvapor; identify Lvapor

Here, Q is the heat, m is the mass and L is the latent heat of vaporization.

The amount of heat required to convert the 1 kg liquid into 1 kg vapor at constant temperature.  

iii. Q = mLfusion; identify Lfusion

Here, Q is the heat, m is the mass and L is the latent heat of fusion.  

Here, Q is the heat, m is the mass and L is the latent heat of vaporization.

The amount of heat required to convert the 1 kg solid  into 1 kg liquid at constant temperature.  

(i) c is the molar heat capacity of the substance.

(ii) Lvapor is the latent heat of evaporation of the substance

(iii) Lfusion is the latent heat of fusion of the substance

All the 3 equations fall under Calorimetry.

In all the equation Q is the amount of heat required.

(i) First equation represents the amount of heat required to raise the temperature of a substance of mass m.

                          Q = mcΔT

       here c is the molar heat capacity of the substance and ΔT is the chnage in temperature.

(ii) Second equation represents the amount of heat required to convert a substance of mass m from liquid phase to vapour phase.

                          Q = mLvapor

        here Lvapor is the latent heat of evaporation of the substance

during evaporation no change in temperature occurs.      

(iii) Third equation represents the amount of heat required to convert a substance of mass m from solid phase to liquid phase.

                          Q = mLfusion

        here Lfusion is the latent heat of fusion or melting of the substance

during fusion no change in temperature occurs.    

Learn more about calorimetry:

https:brainly.com/question/25280399

Answer:

8.24 mL

Explanation:

Density can be defined as mass per unit volume, according to the relationship shown in the attached image. Moles (a unit of measurement for small entities) can also be related to mass. Let's look at two formulas which would be useful for answering this question.

\(\boxed{\text{Density}=\frac{\text{Mass}}{\text{Volume}} }\)

\(\boxed{\text{Mole}\times\text{Mr}=\text{Mass (in grams)}}\) , where Mr stands for relative molecular mass

From the periodic table the Mr of nickel is 58.7.

Multiply the number of moles by the Mr:

Mass of Ni

= 1.25(58.7)

= 73.375 g

Calculate the volume of Ni:

Volume

= mass ÷density

= 73.375 ÷8.90

= 8.24 ml (3 s.f.)

To learn more about density, check out: https://brainly.com/question/15278418

The kinetic energy is 0.5177 × 10⁻²¹ J more at 50°C compared to 25°C.

The average kinetic energy of a molecule is directly proportional to the absolute temperature of a gas.

KE = ( 3/2 ) ( R / Nₐ ) T

Where T is the temperature of the molecule, R is the gas constant, and Nₐ is Avogadro's number.

Now, R = 8.314 J/mol.K

Avogadro's number, Nₐ = 6.022 × 10²³ atoms/ mol

The average kinetic energy at 50° C is:

T = 50° C = 323 K

KE₁ = ( 3/2 ) × ( R / Nₐ ) × T₁

KE₁ = ( 3 × 8.314 × 323 ) / ( 2 × 6.022 × 10²³ )

KE₁ = 668.90 × 10⁻²³ J

KE₁ = 6.6890 × 10⁻²¹ J

The average kinetic energy at 25°C is:

KE₂ = ( 3/2 ) × ( R / Nₐ ) × T₂

KE₂ = ( 3 × 8.314 × 298 ) / ( 2 × 6.022 × 10²³ )

KE₂ = 617.13 × 10⁻²³ J

KE₂ = 6.1713 × 10⁻²¹ J

Now,

The average kinetic energy of the molecules at 50° C compared to 25° C is:

KE = KE₁ - KE₂

KE = 6.6890 × 10⁻²¹ - 6.1713 × 10⁻²¹

KE = 0.5177 × 10⁻²¹ J

Hence, the average kinetic energy is 0.5177 × 10⁻²¹ J more at 50° C compared to 25° C.

Learn more about kinetic energy here:

https://brainly.com/question/8101588

#SPJ9

The mass of carbon dioxide produced upon the complete combustion of 23.7 L of propane is  44.0352 kg.

The balanced equation for the combustion reaction of propane is: C3H8 + 5O2 → 3CO2 + 4H2O

To find the mass of CO2 produced, we first need to find the mass of propane in the tank. We can do this using the density of liquid propane and the volume of the tank:
mass of propane = density × volume
mass of propane = 0.621 g/mL × 23.7 L × 1000 mL/L
mass of propane = 14717.7 g

Next, we can use the balanced equation to find the moles of propane and carbon dioxide:
moles of propane = mass of propane / molar mass of propane
moles of propane = 14717.7 g / 44.1 g/mol
moles of propane = 333.6 mol

moles of carbon dioxide = moles of propane × (3 mol CO2 / 1 mol C3H8)
moles of carbon dioxide = 333.6 mol × 3 mol CO2 / 1 mol C3H8
moles of carbon dioxide = 1000.8 mol

Finally, we can use the molar mass of carbon dioxide to find the mass of carbon dioxide produced:
mass of carbon dioxide = moles of carbon dioxide × molar mass of carbon dioxide
mass of carbon dioxide = 1000.8 mol × 44.0 g/mol
mass of carbon dioxide = 44035.2 g

To know more about mass of carbon dioxide refer here:

https://brainly.com/question/16861524#

#SPJ11

The most reliable isotope to use to determine the age of an archaeological site that is about 50,000 years old is carbon-14.

A radioactive isotope of carbon with a half-life of roughly 5,700 years, carbon-14 decays over time. This makes it the perfect option for dating artifacts that are older than 50,000 years. Radiocarbon dating is the process of using carbon-14 to establish an archaeological site's age. The process entails calculating the amount of carbon-14 that is still present in a sample and comparing it to the amount that was initially present when the sample was alive.

The rate of carbon-14 decay can then be used to determine the sample's age. For dating archaeological materials like bones, teeth, charcoal, and wood, this technique has been used extensively.

Learn more about carbon-14:

brainly.com/question/4206267

#SPJ4

Answer:a mouse

Explanation:

Answer: a mouse

Explanation:

The methods by which the two ethers listed can be prepared are shown in the image attached.

An alkoxide ion reacts with either an alkyl halide or a primary alkyl sulfonate to produce ethers. The halide or sulfonate group is replaced by the alkoxide ion, which functions as a nucleophile and creates the ether. Normally, the reaction takes place in the presence of a potent base, like sodium or potassium hydroxide.

Acid-Catalyzed Two alcohol molecules can be converted into symmetrical ethers using the dehydration of alcohols.

Learn more about preparation of ethers:https://brainly.com/question/32190502

#SPJ1