Margerie is performing a reaction in her chemistry lab. She combines two liquid
reactants and heats them up. When the two reactants combine, they form a new
compound and none of the reactants are left over. This product is a liquid with a slightly
different color.Is the new product that Margerie made a mixture?
No, because the two original reactants cannot be separated through physical means after the
reaction.
O Yes, because she combined two liquids and made a new product that is evenly mixed.
O No, because she used heat instead of just stirring the mixture.
Yes, because there was a color change.

To make a 100 ml solution of 0.8 m from a 2.7 m concentrated stock solution we have to take a volume of: 30 ml of the concentrated solution

To solve this problem, the formula and the procedure that we have to use is:

c1 * v1 = c2 * v2

Where:

Information about the problem:

Applying the dissolution of concentrations formula and clearing the volume of the concentrated solution (v1) we get:

c1 * v1 = c2 * v2

v1 = (c2 * v2)/ c1

v1 = (0.8 m * 100 ml)/ 2.7 m

v1= 29.6 ml

By rounding the volume to a whole integer value we have:

v1= 30 ml

In chemistry a solution is known as a homogeneous mixture of two or more components called:

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22.4L

of any gas contains 1 mol of that gas.

50.75g/10L*22.4L/1 mol= 113.68g/mol- this is the mole weight of your gas

1 mol/113.68g*129.3g=1.137403 mol

Set up a ratio

1.137403mol/x L=1 mol/22.4 L

X=25.477827L, or with sig figs, x=25.5L

According to the equation, one molecule of H₂ reacts for every two molecules of C₂H₄ that respond at the particle level. One molecule of C₂H₆ is created when these molecules join.

According to the equation, 1 mole of H₂ reacts for every 1 mole of C₂H₄ that does. To create 1 mole of C₂H₆, these reactants must be combined in a ratio of 1:1.

The balanced equation for the chemical reaction is:

\(C_2H_4_(g_) + H_2_(g_) -- > C_2H_6_(g_)\)

This equation illustrates how ethene (C₂H₄) and hydrogen gas (H₂) combine to create ethane. (C₂H₆). The stoichiometric coefficients in the equation denote the mole ratios of the reactants and products in the balanced equation. They are represented by the coefficients in the equation.

According to the equation, one molecule of H₂ reacts for every two molecules of C₂H₄ that respond at the particle level. One molecule of C₂H₆ is created when these molecules join.

According to the equation, 1 mole of H₂ reacts for every 1 mole of C₂H₄ that does. To create 1 mole of C₂H₆, these reactants must be combined in a ratio of 1:1.

In general, the balanced equation and its coefficients offer crucial details about the proportions of reactants and products engaged in the chemical reaction.

Chemical processes are modeled by chemical equations. The proportions of the reactants and products engaged in a chemical reaction are displayed in a balanced chemical equation.

The reactant's and products' mole ratios, which show the relative amounts of each substance engaged in the reaction, are represented by the coefficients in the balanced equation.

The mass conservation principle, says that mass is neither produced nor destroyed in a chemical reaction and experimental data are used to determine these coefficients.

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Answer: This strand is made in fragments because, as the fork moves forward, the DNA polymerase (which is moving away from the fork) must come off and reattach on the newly exposed DNA. This tricky strand, which is made in fragments, is called the lagging strand.

Explanation:

Answer:

The ecological relationship between termites and the wood-digesting protozoans that live in their gut is an example of  mutualism. Thank you for posting your question here at brainly. I hope the answer will help you.

Answer:

2MnO2 + H2O => Mn2O3 + 2OH is the correct balanced equation.

When manganese oxide reacts with water to form a different manganese oxide and hydroxide, the correct balanced equation for this is 2MnO₂ + H₂O ⇾ Mn₂O₃ + 2OH.

The term balance chemical equation is define as the equation which satisfy the law of conservation of mass, i.e., “Total mass of the products is equal to the total mass of all the reactants”.

If a chemical equation is not balanced, it will break the law of conservation of mass. It will indicate that either mass is created or destroyed, which is impossible.

Balanced chemical equations have the equal number and type of each atom on both sides of the equation.  

Thus, When manganese oxide reacts with water to produce a different manganese oxide and hydroxide, the correct balanced equation for this reaction is 2MnO₂ + H₂O ⇾ Mn₂O₃ + 2OH.

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The supreme court decision is: Tinker v. Des Moines Independent Community School District (1969).

The landmark Supreme Court case of Tinker v. Des Moines Independent Community School District (1969) was monumental in its decision to protect freedom of expression. This case involved several Iowa high school students, who were suspended from school for wearing armbands as a form of protest against the Vietnam War. The students took their case to court, arguing that their right to free expression was violated by the school district. The court ultimately sided with the students, ruling that “students do not shed their constitutional rights to freedom of speech or expression at the schoolhouse gate”.

This ruling was the first time that the Supreme Court had addressed the issue of student expression in public schools. The ruling established the precedent that students are protected by the First Amendment in public schools, and that school administrators must have a valid reason to restrict student speech. This ruling was also important in protecting the rights of students to express their opinions in a peaceful manner. In addition, the case highlighted the importance of individual expression and the power of students to challenge the status quo.

Which of the following supreme court decisions allows public school students to wear t-shirts protesting a school board decision that eliminates funding for high school arts programs?

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Answer:

It loses kinetic energy.

Explanation:

The definition of heat is molecules moving fast, so it cooling would mean they slow down.

Answer:

B, It loses kinetic energy.

Explanation:

To determine the specific internal energy of a two-phase liquid-vapor mixture, we can use the steam tables. The steam tables provide information about temperature, volume, and energy for each phase of the mixture.

First, we must determine the specific volume of each phase at the given temperature.

The specific volume of the liquid phase is given in the liquid table, and the specific volume of the vapor phase is given in the vapor table. Then, we must use the specific volumes to calculate the mass of each phase.

Finally, the internal energy can be calculated by multiplying the mass of each phase by the specific internal energy of that phase, which is also given in the steam tables.

This process should be repeated for each temperature and specific volume of the two-phase mixture to accurately determine the internal energy.

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Paint has a component known as the binder, which is a liquid that is responsible for holding the pigment particles together and enabling the paint to be applied to a surface.

Without a binder, the pigment would not be able to stick to the surface and would simply fall off or rub off. The binder serves as a "glue" that holds the pigment in place and helps it adhere to the surface. There are various types of binders that can be used in paint, including oil, water, and various synthetic polymers. The choice of binder will depend on the type of paint being used and the desired properties of the finished product.

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Answer:

200.00 mol

Explanation:

Nitric acid: Nitrogen dioxide is 2:3

and nitrogen dioxide is already 300.00 mol so using the ratio, nitric acid is 200.00 mol

Answer:

200.00

Explanation:

Did it on edge GL

The ranking of the given compounds in terms of priority from highest to lowest is CH3 < Br < -I < -OH.

The ranking of the compounds is determined by their functional groups and their ability to affect the reactivity of a molecule. In this case, we are comparing the functional groups -OH (hydroxyl), -I (iodide), Br (bromine), and \(CH_3\) (methyl).

The highest priority is given to -OH because it is an alcohol functional group, which is highly reactive and can participate in various chemical reactions. It has a higher priority compared to the other groups.

Next, we have Br, which represents a bromine atom. Bromine is less reactive than -OH but more reactive than -I. Therefore, it has a higher priority compared to -I.

The lowest priority is given to -I, which represents an iodine atom. Iodine is the least reactive among the given groups, and it has the lowest priority.

Finally, \(CH_3\), which represents a methyl group, has the lowest priority among all the functional groups mentioned. Methyl groups are relatively unreactive and have the least influence on the reactivity of a molecule compared to the other functional groups.

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Answer:

Don't worry school's will re-open in August 2021. ._.

Explanation:

i think everyone does. so i'll help you

the volume of Cl2(g) in the sealed container is 0.0166 L (16.6 mL).

We must first determine the moles of NaCl in the 25.00 ml sample of 0.250 M NaCl in order to compute the number of moles of Cl-(aq) present before any reaction takes place:

M x V = 0.250 mol/L x 0.025 L = 0.00625 mol for moles of NaCl.

Since 1 mole of Cl-(aq) is produced for every mole of NaCl, there are 0.00625 moles of Cl-(aq) in the environment before any reactions take place.

Next, we apply the Ideal Gas Law (PV = nRT) to determine the volume of Cl2(g) within the sealed container:

PV = nRT

in which P is pressure (0.950 atm)

Volume is V. (unknown)

n = the quantity of gas moles (0.00625 mol)

R = (0.0821 L atm/mol K) gas constant

T = temperature (22 °C to 295 K conversion).

calculating for V

V = nRT

V = nRT / P = 0.00625 mol x 0.0821 L atm/mol K x 295 K / 0.950 atm = 0.0166 L = 16.6 mL

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The cl2(g) produced is dried and stored in a sealed container. at 22oc the pressure of the cl2(g) in the container is 0.950 atm the volume is 0.0166 L.

M x V = 0.250 mol/L x 0.025 L = 0.00625 mol for moles of NaCl.

Volume is V. (unknown)

n = the quantity of gas moles (0.00625 mol)

R = (0.0821 L atm/mol K) gas constant

T = temperature (22 °C to 295 K conversion).

calculating for V

V = nRT

V = nRT / P = 0.00625 mol x 0.0821 L atm/mol K x 295 K / 0.950 atm = 0.0166 L = 16.6 mL

An ideal gas is defined as one for which both the volume of molecules and forces between the molecules are so small that they have no effect on the behavior of the gas.This law relates four different variables which are pressure, volume, no of moles or molecules and temperature. Basically, the ideal gas law gives the relationship between these above four different variables.

PV=nRT

where,

P is the pressure.

V is the volume.

n is the amount of substance.

R is the ideal gas constant.

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The alkali metals can't exist alone in nature because of incomplete outermost shell of alkali metals.

The alkali metals have the high thermal and electrical conductivity. It has high lustre, ductility, and malleability as compared to other materials. Each alkali metal atom has one electron in its outermost shell which make more reactive.

So we can conclude that the alkali metals can't exist alone in nature because of incomplete outermost shell of alkali metals.

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Density is referred to as a characteristic property of matter because Option A. the density of a substance is the same regardless of the mass and the volume of the substance at a given temperature.

Density is the substance's mass consistent with the unit of quantity. The symbol most customarily used for density is ρ, despite the fact that the Latin letter D can also be used. Density is the size of ways tightly a cloth is packed together. it's far defined as the mass consistent with unit quantity.

ρ = m/V, wherein ρ is the density, m is the mass of the item and V is the quantity of the object.

The density of a liquid is a measure of how heavy it is for the quantity measured. in case you weigh the same amounts or volumes of two one-of-a-kind beverages, the liquid that weighs extra is greater dense.

The density is of two types, one is absolute density, and the alternative is relative density. Relative density is also called unique gravity, which is the ratio of the density of a material to the density of a reference material. typically, the reference fabric is water.

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Answer:

Nuclear fusion is the process by which two or more atomic nuclei join together to form a single heavier nucleus and large amounts of energy.

The total interaction energy in units of eV/atom assuming λ = 4156 eV and R_0/rho = 12 is 150N eV/atom.

Given Potential for two inert gas (Xe) atoms at separation R :

U=λe^(-R/rho)-R^6/a^6

a) To calculate the potential energy of the two atoms at equilibrium separation R_0,

we have to put dU/dR = 0λ e^(-R_0/rho) = (6R_0^6)/(a^6)λ e^(-R_0/rho) = (6(12rho)^6)/(a^6)

Therefore, λ = (6(12rho)^6)/(a^6) * e^(12)

The potential energy can be expressed as, U=λe^(-R_0/rho) = ((6(12rho)^6)/(a^6)) * e^(12) * e^(-12rho/rho)= ((6*12^6)/a^6) * e^(-11rho)

b) Given R_0 = 12rho, λ = (6(12rho)^6)/(a^6) * e^(12)

Therefore, λ = (6(12rho)^6)/(a^6) * e^(12) = (6 * 12^6)/(a^6) * e^(12) * e^(-12) = (6 * 12^6)/(a^6)

Potential energy U = λe^(-R_0/rho) = (6 * 12^6)/(a^6) * e^(-11rho)c)

The total interaction energy in units of eV/ atom assuming λ = 4156 eV and R_0/rho = 12

Therefore, λ = (6(12rho)^6)/(a^6) * e^(12) = (6 * 12^6)/(a^6) * e^(12) * e^(-12) = (6 * 12^6)/(a^6)

Total energy (U) = (N/2)U = (N/2)λe^(-R_0/rho) = (N/2)(6 * 12^6)/(a^6) * e^(-11rho) = 150N eV/atom.

Therefore, the total interaction energy in units of eV/atom assuming λ = 4156 eV and R_0/rho = 12 is 150N eV/atom.

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Answer:

true!

Explanation:

If Justin drives 3 miles north and 1.5 miles to the east to get to school and takes him 45 minutes, his average speed/velocity is 6 miles/hour north east.

Speed is the amount of distance traveled by an object per unit of time. On the other hand, velocity is the amount of speed and the direction it is moving. Speed is a scalar quantity while velocity is a vector quantity.

To get the speed of Justin driving from home to his school, divide the distance he traveled by the amount it took him.

speed = (3 miles + 1.5 miles) / 45 minutes(1hr/60 minutes)

speed = 6 miles/hour

Taking note of the direction he traveled, the velocity will be:

velocity = 6 miles/hour north east

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Answer:

See answer below

Explanation:

I have to answer this question in english because is the rule here. I hope you can understand this.

Now, in order to answer this, is really easy. We already have the quantity of SO₂ in the air of a city. This concentration is 14 mg/m³, so we want to know the quantity in 1 L. This quantity can be expressed in mass.

If concentration according to the units is: mg/m³ This means that we have units of mass and volume. So, in order to know the quantity of SO₂ in mass, we need to convert the units of volume m³ to liter.

1 m³ is covered in 1000 L, therefore:

14 mg/m³ * 1 m³/1000 L = 0.014 mg/L

Then, the mass will be:

m = 0.014 mg/L * 1 L

m = 0.014 mg of SO₂

This is the quantity of SO₂ in 1 L.

Answer:

a

Explanation:

it made of metals and non metals

Answer

0.009 mol/L

Explanation

Given:

Mass of KCl = 0.66 g

Volume of water = 700 mL = 0.7 L

From the periodic table: 1 mol K = 39.10 g; 1 mol Cl = 35.453 g

What to find:

The molarity of the solution

Step-by-step solution:

The formula to calculate molarity is:

The first step is to calculate the molar mass of KCl

KCl = Mass of 1 mol K + Mass of 1 mol Cl

KCl = 39.10 g + 35.453 g

KCl = 74.553 g

So the molar mass of KCl = 74.553 g/mol

The next step is to determine the number of moles of KCl in 0.66g of KCl:

Put the values of mole and volume into the molarity formula above to determine the molarity of the solution:

The molarity is 0.009 mol/L

Answer:

write down each element and what you need to know about it repeatedly, and it will burn into your brain

Explanation:

Length x width x height can define the volume of an object.

Volume can be defined as the space which is occupied by an object in space. It is also called the capacity of the object. The volume of an object also refers to the amount of space it fills. Very large Volumes can be measured in cubic meters (m3) while the other hand, while the Smaller volumes can be measured in cubic centimeters (cm3) as well as cubic millimeters (mm3). Volume has three dimensions i.e. length, width, and height whereas area has two dimensions i.e. length and width. We can calculate the volume of an object with the help of a formula i.e. Volume = length × width × height.

So we can conclude that volume of an object can be calculated with the help of the formula i.e. Volume = length × width × height.

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