What process results in a new substance being formed?

Chemical reaction

Physical change

Mixing

Answer:

Option 1.

Explanation:

3.6cm * 1inch/2.54 cm = 1.417 inch

The molar mass of the substance b was found to be 2.02 g/mol

what does effusion mean ?

1. The act of pouring forth; as in effusion of water, blood, grace, speech, and so on.

2. That which is poured out, either literally or metaphorically.

3. The escape of a fluid from its natural vessel, either by rupture or exudation through its walls. It may enter the substance of an organ or emerge on a free surface.

4. The liquid that is leaking or exuding.

5. The act of pouring out; that which is poured out

Finally, they remembered that England had frequently been harassed and invaded by the Romans, Saxons, Danes, Normans, and other nations at various times, resulting in great effusion of blood and frequent alteration of government constitutions; and if anything could be devised to prevent the like in the future, they should erect a lasting monument to their names.

Making his entry with much pomp and ostentation, he congratulated the ladies and shook each of their hands in both his own.

Virgie felt repugnance in every nerve as he shook hands with effusion.

The molar mass of the substance b was found to be 2.02 g/mol

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Answer:

Only Harry and Jena

Explanation:

Under federal regulations, an UST is any one or a combination of tanks such that the volume of an accumulation of regulated substances is 10% or more beneath the surface of the ground.

Any UST system holding a mixture of hazardous waste and other regulated substances are also are not covered by federal regulations regarding USTs.

Farm or residential tank of capacity more than 11 gallons used for storing motor fuel is covered by federal regulations regarding USTs.

According to the given question,

Only Harry and Jena are covered by federal regulations regarding USTs.

Answer:

33 m/s.

Explanation:

Since in 1 second, you walk 3 meters so in 11 seconds, you will walk 33 m/s.

1 second = 3 meters.

11 seconds = 11 x 3 m/s = 33 m/s

If you walk at a speed of 3 meters per second (m/s),  33 m/s you walk in 11 seconds. Speed may be described as the distance an item goes with relation to the time something takes to complete the task.

The distance that an item travels in relation to the period of time it takes to complete this task may be used to define speed. In other terms, it refers to a measurement of an object's motion's speed without direction Velocities are what we get when speed and direction are combined.

Speed may be described as the distance an item goes with relation to the time something takes to complete the task. To put it differently, it refers to a measurement as to how swiftly something travels. Speed is measured in metres per second, or m/s, since the distance is measured in meters and the time is measured in seconds.

1 second = 3 meters.

11 seconds = 11 x 3 m/s = 33 m/s

Therefore, if you walk at a speed of 3 meters per second (m/s),  33m/s you walk in 11 seconds.

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Answer: Elements in the same family generally have similar properties because they contain the same number of the electrons, for instance.

Hope this helped!

Answer:

dgdgdf

Explanation:

and yeah thatds it

Answer: D.)Topsoil

Explanation: Have agriculture

Answer:

keep it from being washed away by water

Answer:

alkali metals hydrogen lithium sodium potassium rubidium cesium francium alkaline earth metals beryllium magnesium calcium strontium barium radium group 3 boron aluminium gallium indium thalium carbon family carbon silicon germanium tin lead

Explanation:

i hope this will help you :)

There's Hydrogen and Helium

Then Lithium, Beryllium

Boron, Carbon everywhere

Nitrogen all through the air

With Oxygen so you can breathe

And Fluorine for your pretty teeth

Neon to light up the signs

Sodium for salty times

Silicon

(Phosphorus, then Sulfur) Chlorine and Argon

(Potassium) And Calcium so you'll grow strong

(Scandium) Titanium, Vanadium and Chromium and Manganese

This is the Periodic Table

Noble gas is stable

Halogens and Alkali react aggressively

Each period will see new outer shells

While electrons are added moving to the right

Iron is the 26th

Then Cobalt, Nickel coins you get

Copper, Zinc and Gallium

Germanium and Arsenic

Selenium and Bromine film

The pH of clean water increases when an acid is introduced. The opposite is true if a base is introduced to pure water. A solution's hydronium ion concentration must fall as the concentration of hydroxide ions rises.

If there are more hydrogen ions than hydroxide ions in a solution (i.e., pH pOH), the solution is acidic. Since the concentration of hydrogen and hydroxide ions in pure water is constant, even when the pH changes, the water remains neutral (pH = pOH).

Bases and Acids

An acid is a chemical that, when introduced to pure water, will cause the pH to fall. In a similar way, a base is something that will raise the pH of water by 4.

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Therefore, the concentration of the [CoCl4]2- complex with an absorbance value of 0.55 (assuming a path length of 1 cm) is approximately 0.000953 M.

The molar absorptivity value, also known as the molar absorption coefficient, is a measure of how strongly a substance absorbs light at a specific wavelength. In this case, the reported molar absorptivity value for the [CoCl4]2- complex is 577.2 M-1cm-1.

To find the concentration of the complex with an absorbance value of 0.55, we can use the Beer-Lambert Law, which states that absorbance (A) is equal to the molar absorptivity (ε) times the concentration (c) times the path length (l):

A = εcl

Given that the absorbance value (A) is 0.55 and the path length (l) is 1 cm, we can rearrange the equation to solve for the concentration (c):

c = A / (εl)

Plugging in the values, we have:

c = 0.55 / (577.2 M-1cm-1 * 1 cm)

Simplifying the calculation, we get:

c ≈ 0.000953 M

Therefore, the concentration of the [CoCl4]2- complex with an absorbance value of 0.55 (assuming a path length of 1 cm) is approximately 0.000953 M.

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39.17 ml of the 15.0 M HF stock solution is required to prepare 250.0 ml of a 2.35 M HF solution.

To prepare 250.0 ml of a 2.35 M HF solution from a 15.0 M HF stock solution, we can use the formula M1V1 = M2V2, where M1 is the initial molarity, V1 is the initial volume, M2 is the final molarity, and V2 is the final volume.
In this case, we are looking for V1, the volume of the stock solution required.
M1 = 15.0 M
V1 = ?
M2 = 2.35 M
V2 = 250.0 ml
Plugging the values into the formula, we get:
15.0 M x V1 = 2.35 M x 250.0 ml
Solving for V1, we get:
V1 = (2.35 M x 250.0 ml) / 15.0 M
V1 = 39.17 ml
Therefore, 39.17 ml of the 15.0 M HF stock solution is required to prepare 250.0 ml of a 2.35 M HF solution.

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If our clothing catches fire or a large number of chemicals is spilled on our clothing, the best thing to do is stop, drop, and roll.

Stop where we are, drop to the ground, and roll to put out the fire or absorb the chemical spill. You should also try to cover your face, mouth, and nose with your hands or a cloth to avoid inhaling chemicals or smoke.

If possible, we should also seek help from someone nearby who can help us with the fire or chemical spill. Make sure to call emergency services as soon as possible. If the clothing is still burning, you should take off any items of clothing that have not been burned or affected by the chemical spill, and move away from the fire or spill as quickly as possible.

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The enthalpy change when 5 g of zinc metal is heated from 100oc to the point where the entire sample is melted having the heat of fusion for zinc is 112.4 j/g and its specific heat capacity is 0.388 is 581.4 J.

specific heat capacity is 0.388 j-1c-1 .

The specific heat capacity can be defined as the quantity of heat (J) absorbed per unit mass (kg) of the material when its temperature increases 1 K.  

The heat of fusion for zinc is 112.4 j-1.

The expression for Heat energy is,

             = mcΔT+mL

where, m = mass of water

c = specific heat capacity of water

L = specific latent heat of fusion of ice

ΔT = change in temperature

Heat energy can be explained as a result of the movement of tiny particles called atoms, molecules or ions in solids, liquids and gases. It can be transferred from one object to another. The transfer or flow of heat energy due to the difference in temperature between the two objects is called heat.

Putting all the values in the expression of heat energy, we get,

  = 0.5 g * 0.388 * 100 + 5 * 112.4

  = 19.4 + 562

   = 581.4 J

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The temperature at which the solution with 5.0 g KCl and 10 mL H2O precipitates would depend on the specific solubility of KCl in water at different temperatures, which can be determined from a solubility table or graph.

The temperature at which a solution of 5.0 g KCl and 10 mL H2O precipitates depends on the solubility of KCl in water. KCl is a salt that can dissolve in water to form a solution.

To determine the temperature at which precipitation occurs, we need to consider the solubility of KCl in water at different temperatures. The solubility of KCl increases with increasing temperature, which means that more KCl can dissolve in water as the temperature rises.

At a certain temperature, called the saturation temperature, the solution becomes saturated, meaning that it contains the maximum amount of KCl that can dissolve in water at that temperature. If we cool down the saturated solution below this temperature, the excess KCl will start to precipitate out of the solution.

To find the saturation temperature, we would need to consult a solubility table or graph specific to KCl in water. The solubility of KCl in water is typically given in grams of solute (KCl) per 100 mL of water at a given temperature.

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Answer:helium or the noble gases

Explanation: The ionization energy decreases from top to bottom in groups, and increases from left to right across a period. Thus, helium has the largest ionizing energy

The two basic geologic processes which contributed to the formation of folded mountain ranges like in Glacier National Park include:

This is a geologic process which involve materials in the earth being washed away and transported to other parts by water, wind etc.

In the case of Glacier National Park, ice erodes the mountain thereby resulting in the folding of the sedimentary rocks.

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This reaction is an example of a neutralization reaction, which occurs when an acid and a base react to form a salt. In this case, ethylamine (C2H5NH2) is a weak base and water (H2O) is a weak acid.

Reaction: C2H5NH2 + H2O → C2H5NH3+ + OH-

Reactants: C2H5NH2 (ethylamine) and H2O (water)

Products: C2H5NH3+ (ethylammonium ion) and OH- (hydroxide ion)

When they react, they form an ethylammonium ion (C2H5NH3+) and a hydroxide ion (OH-).

This reaction is an important part of the nitrogen cycle, in which nitrogen is converted from one form to another in order to become part of the food chain. The products of this reaction can also be used as fertilizers for plants.

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The mole fraction of the solvent is 0.905.

The mole fraction of solvent in a solution with a vapor pressure of 47.89 torr if the vapor pressure of the pure solvent is 52.86 torr, can be determined using the following equation given by Rault's Law:

x = p/p⁰

where, x= Mole Fraction of Solvent, p=Vapor Pressure of Solution, p⁰=Vapor Pressure of Pure Solvent


Using this equation, we can determine the mole fraction of solvent in this solution as follows:


Mole Fraction of Solvent = 47.89 torr/52.86 torr = 0.905


Therefore, the mole fraction of solvent in a solution with a vapor pressure of 47.89 torr, if the vapor pressure of the pure solvent is 52.86 torr, is 0.905.

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Answer:

D.Cooking an egg

Explanation:

This is because when cooked, the heat denatures the proteins which changes their properties and composition. The most clear ways this happens with eggs are when they're fried for something like egg fried rice.

(a) To get the pH of the media to 5.8, you would add NaOH solution. NaOH is used as a basic solution, and when it is added to a solution, it will increase the pH of the solution.

(b) The molecular weight of BA is 225.3. To prepare a 1M solution, you would have to weigh out 225.3 grams of BA.(c) To convert a 1M solution of BA to mg/mL, you can use the following equation: 1 mole = molecular weight in grams; 1000 millimoles = 1 mole. So, 1 M = 1000 mg/mL. Therefore, a 1M solution of BA is equivalent to 1000 mg/mL .(d) To convert a concentration of 1000 mg/mL .

Therefore, to calculate the weight required for a 5 mM solution, use the following formula :Mass of BA = molarity × volume × molecular weight= 5 × 0.001 × 225.3= 1.1265 grams(f) To convert a concentration of 5 mM to mg/mL, we use the following formula: Concentration (mg/mL) = (Concentration (mM) × Molecular weight) / 1000= (5 × 225.3) / 1000= 1.1265 mg/mL(g)

To convert a concentration of 1.1265 mg/mL to mg/L, we multiply by 1000, so 1.1265 mg/mL = 1126.5 mg/L.(h) Given that the stock solution of BA is 5 mM and the working solution is 0.2 mg/mL.

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Answer:

CATION

Explanation:

If an atom has an equal number of protons and electrons, its net charge is 0. If it gains an extra electron, it becomes negatively charged and is known as an anion. If it loses an electron, it becomes positively charged and is known as a cation.

Answer:

0.483 g/g

Explanation:

Solubility of KCl in water at 70o C is = 48.3 g/100 g = 0.483 g/g.

The fact that the amount of sunlight should vary every day is the missing factor.

It goes without saying that Katherine wants to find out if the time of day a plant is watered impacts its growth. She waters various plant species with the same quantity of water at various intervals throughout the day. The plants receive the same amount of sunshine and are situated in the same spot.

Plants should be watered at various times of the day, an independent variable.

Controlled variable; identical plant species should be used in the experiment

Sunlight intensity is a dependent variable that should fluctuate everyday.

Controlled variable; identical water volume should be used in the experiment

From above we can conclude that missing variable is that the amount of sunlight should change daily.

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Answer:

V = 5000 mL

Explanation:

¡Hola!

En este caso, dado que la molaridad de una solution se calcula al dividir las moles por el volume de solución en litros, es posible calcular el volumen cuando se dividen las moles por la molaridad, tal y como se muestra a continuación:

\(M=\frac{n}{V}\\\\V=\frac{n}{M}\)

Así, podemos reemplazar la molaridad y moles dadas para obtener:

\(V=\frac{1.5mol}{0.3mol/L}=5L\)

Que en mililitros sería:

\(V=5L*\frac{1000mL}{1L}\\\\V=5000mL\)

¡Saludos!

Answer:

A, B, D, E

Explanation:

did it on edg

Answer:

A. Making laundry detergent

B. Making dish detergent

D. De-hairing hides

E. Making paper

Explanation:

The amount of heat in joules needed to heat up 57.1 grams of ice at 0 Celsius to 66 Celsius is 34857 J.

To calculate the amount of heat in joules needed to heat up 57.1 grams of ice at 0 Celsius to 66 Celsius, we can use the following formula:

q = m x c x ΔT

Where:
q = amount of heat (in joules)
m = mass of the substance (in grams)
c = specific heat capacity of the substance (in J/g°C)
ΔT = change in temperature (in °C)

First, we need to calculate the amount of heat needed to melt the ice:

q1 = m x ΔHf

Where:
ΔHf = heat of fusion of ice (334 J/g)

q1 = 57.1 g x 334 J/g = 19039.4 J

Next, we need to calculate the amount of heat needed to raise the temperature of the water from 0°C to 66°C:

q2 = m x c x ΔT

Where:
c = specific heat capacity of water (4.184 J/g°C)

ΔT = 66°C - 0°C = 66°C

q2 = 57.1 g x 4.184 J/g°C x 66°C = 15817.6 J

Finally, we add the two amounts of heat together to get the total amount of heat needed:

q = q1 + q2
q = 19039.4 J + 15817.6 J
q = 34857 J

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Answer:

Cl² is dichlorine

Explanation:

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Answer: