A strong beam of light is directed toward a tank filled with water. What caused the beam of light to change direction?

Answer:

a. CH3NH2(aq) + H⁺ → CH3NH3⁺

Explanation:

The mixture of a weak base as CH3NH2 with its conjugate acid CH3NH3Cl produce a buffer. As the weak acid is in equilibrium with water, the mixture of the weak base and its conjugate base produce that the acid or base released react avoiding the change in pH.

For example, when a strong acid as HNO3 reacts, the weak base will react producing the conjugate base, that is:

CH3NH2(aq) + H⁺ → CH3NH3⁺

Right answer is:

Answer:

0.7 L

Explanation:

Step 1: Given data

Step 2: Calculate the final volume of the container

If we assume ideal behavior and constant temperature, we can calculate the final volume of the container using Boyle's law.

P₁ × V₁ = P₂ × V₂

V₂ = P₁ × V₁/P₂

V₂ = 0.5 atm × 2.4 L/1.7 atm = 0.7 L

Using standard thermodynamic data at 298K, the entropy changes of the environment when 1.59 mol of P₄O₁₀ (s) is irritated at standard conditions is - 45339.5 J/K

∆H°f product is the total enthalpy of standard formation based on the product substances. ∆H°f reactants is the total enthalpy of the standard formation based on the reactants.

We know:

∆H⁰f (P₄O₁₀) = - 2984 KJ/mol

∆H⁰f (H₂O) = - 285.8 KJ/mol

∆H⁰f (4H₃PO₄) = - 1288.3 KJ/mol

The e reaction is:

                               P₄O₁₀ (s) + 6H₂O (l) → 4H₃PO₄ (aq)

∆H⁰rxn = ∆H⁰f  products - ∆H⁰f  (reactants)

∆H⁰rxn = [4∆H⁰f (P₄O₁₀)] - [1 ∆H⁰f (P₄O₁₀) + 6 ∆H⁰f (H₂O)]

∆H⁰rxn = [4(- 1288.3)] - [ 1(- 2984) + 6(- 285.8)]

∆H⁰rxn = [ - 5153.2] - [ -11936 - 1714.8]

∆H⁰rxn = [- 5153.2] - [-13650.8]

∆H⁰rxn = - 5153.2 + 13650.8

∆H⁰rxn = 8497.6 KJ

Therefore, ∆H⁰rxn for this reaction is + 8497.6 KJ.

From the above-balanced chemical equation, we can write,

For the reaction of 1 mol of P₄O₁₀,

∆H⁰rxn value = + 8497.6 KJ

Then, for the reaction of 1.59 mol of P₄O₁₀, ∆H0rxn value

= + 8497.6 KJ/1 mol x 1.59 mol

= + 13511.184 KJ

We know,

∆S⁰surroundings = - ∆H⁰rxn/ T

Where,

∆S⁰surroundings = standard entropy changes of the surroundings

∆H⁰rxn = standard enthalpy changes of the reaction

T = temperature in Kelvin

Here,

∆H0rxn = 13511.184 KJ = 13511.184 x 10³ J = 13511184 J

T = 298 K

Now,

∆S⁰surroundings = - ∆H⁰rxn/ T

∆S⁰surroundings = - 13511184J/298 K

∆S⁰surroundings = - 45339.5 J/K

Therefore, the entropy changes for the surroundings when 1.59 mol of P₄O₁₀ reacts at standard conditions is - 45339.5 J/K

Learn more about the entropy at https://brainly.com/question/6364271

#SPJ1

The relation between %TDS coffee and refractive index is given by the formula:

np = 0.00175 (% TDS Coffee) + 1.3342

In the given case

np = 1.3384

So, substituting the value of np in the equation above, we get:

1.3384 = 0.00174 (%TDS Coffee) + 1.3342

⇒ 1.3384 - 1.3342 = 0.00174 (%TDS Coffee)

⇒ 0.0042 = 0.00174 (%TDS Coffee)

⇒ (%TDS Coffee) = 0.0042/0.00174

⇒ %TDS Coffee = 2.4137

Hence the value of %TDS Coffee is 2.4137

To learn more about Refractive Index, refer to:

https://brainly.com/question/23750645

#SPJ13

Answer:

• There are 1.8 mol of nitrogen in 0.30 mol of caffeine.

• There are 21.6 mol of hydrogen in 2.7 mol of caffeine.

• There are 16.0 mol of carbon in 2.0 mol of caffeine.

• There are 5.0 mol of oxygen in 2.5 mol of caffeine.

Explanation:

The mass of \(O_2\) needed to produce 8.65 x \(10^{23\) atoms of silver is 22.96 grams.

In the given balanced equation, it is stated that 2 moles of \(Ag_2O\) produce 4 moles of Ag and 1 mole of \(O_2\).

First, let's calculate the number of moles of Ag:

8.65 x \(10^{23\) atoms of Ag / (6.022 x \(10^{23\) atoms/mol) = 1.435 moles of Ag

Since 2 moles of  \(Ag_2O\) produce 1 mole of  \(O_2\), the number of moles of  \(O_2\) needed is half of the moles of  \(Ag_2O\).

Number of moles of  \(O_2\)= 1.435 moles of  \(Ag_2O\) / 2 = 0.7175 moles

Now, we'll use the molar mass of  \(O_2\) to find the mass:

Molar mass = 32.00 g/mol

Mass of  \(O_2\) = number of moles × molar mass

                   = 0.7175 moles × 32.00 g/mol = 22.96 g

Therefore, the mass of  \(O_2\) needed to produce 8.65 x \(10^{23\) atoms of silver is 22.96 grams.

More on stoichiometric calculations can be found here: https://brainly.com/question/27287858

#SPJ1

The balanced chemical equation is for the aqueous reaction of hydroiodic acid (HI) and zinc metal is Zn + 2HI → ZnI₂ + H₂.

The balanced chemical equation is the equation in which the number of atoms on the reactant side is equal to the number of atoms on the product side in an equation.

Now write the balanced chemical equation

Zn + 2HI → ZnI₂ + H₂

Here Zn is a reducing agent, HI is an oxidizing agent.

Thus from the above conclusion we can say that The balanced chemical equation is for the aqueous reaction of hydroiodic acid (HI) and zinc metal is Zn + 2HI → ZnI₂ + H₂.

Learn more about the Balanced Chemical Equation here: brainly.com/question/26694427

#SPJ1

The limiting reactant equation after the chemist's mixture is H₂.

To determine the limiting reactant, we need to compare the moles of each reactant to their stoichiometric coefficients in the balanced chemical equation.

The balanced equation for the reaction between H₂ and N₂ is:

N₂+ 3H₂ → 2NH₃

From the problem, we have 3.2 moles of H₂ and 8.2 moles of N₂. We can use the coefficients from the balanced equation to calculate how many moles of NH₃ each reactant would produce if it completely reacted:

H₂: (3.2 mol H₂) × (2 mol NHH₃ / 3 mol H₂) = 2.13 mol NH₃

N₂: (8.2 mol N₂) × (2 mol NHH₃ / 1 mol N₂) = 16.4 mol NHH₃

The reactant that produces the smaller amount of product is the limiting reactant. In this case, H₂ produces 2.13 mol of NH₃, while N₂ produces 16.4 mol of NHH₃. Therefore, H₂ is the limiting reactant.

Learn more on limiting reactant here: https://brainly.com/question/19033878

#SPJ1

Answer: high pressure, high temperature water extraction

Explanation:

Answer:

C). high pressure, high temperature water extraction

Explanation:

Answer:

Earlier today, my friend got a call from the company where she had recently applied for a job. They informed her that she had been selected for an interview, which was scheduled for later this week. She was overjoyed and relieved to hear the news, as she had been searching for a job for several months and this was one of the positions she was most excited about. The call was definitely the highlight of her day, and it put her in a great mood for the rest of the afternoon! :) She immediately called her parents and friends to share the good news and celebrate!!

Answer:

Mountains, Hills and Rivers

Explanation:

Because I read it and I already know that

Hope that helps!

Answer:

Mountains, Hills and Rivers

Explanation:

Answer: There are \(4.13 \times 10^{-3}\) moles of Pb are contained in \(2.49 \times 10^{25}\) atoms Pb.

Explanation:

According to the mole concept, 1 mole of every substance contains \(6.023 \times 10^{23}\) atoms.

Hence, number of moles present in \(2.49 \times 10^{25}\) atoms of Pb are as follows.

\(No. of moles = \frac{2.49 \times 10^{25}}{6.023 \times 10^{23}}\\= 4.13 \times 10^{-3} mol\)

Thus, we can conclude that there are \(4.13 \times 10^{-3}\) moles of Pb are contained in \(2.49 \times 10^{25}\) atoms Pb.

Answer:1.7

Explanation:

The pH of a solution that is 0.21 M sodium fluoride and 0.57 M hydrofluoric acid is 3.36.

given the data as follows :

sodium fluoride ( base ) = 0.21 M

hydrofluoric acid ( acid )= 0.57 M

using the Henderson - Hassel Balch equation we get:

pH = pKa  +  log (base / acid)

pKa of hydrofluoric acid = 3.8

∴ pH = 3.8 + log ( 0.21 / 0.57 )

pH = 3.8 + ( - 0.4341)

pH = 3.36  

Thus, The pH of a solution that is 0.21 M sodium fluoride and 0.57 M hydrofluoric acid is 3.36.

To learn more about pH here

https://brainly.com/question/491373

#SPJ1

It is most likely Option A: that a chemical change occurred in step 1 and a physical change occurred in step 2.

In step 1, the yellow particles appeared in the liquid, indicating a chemical change. This could be a result of a chemical reaction between the two colorless liquids, or the addition of a reagent that caused a reaction. This change is characterized by the formation of new substances, which are the yellow particles.

In step 2, the colorless liquid was separated from the yellow particles by decantation. Decantation is a physical process that separates immiscible liquids or solid particles from a liquid by allowing them to settle and then carefully pouring off the liquid.

Therefore, This change is characterized by the separation of components of a mixture, no new substances are formed.

Learn more about beaker from

https://brainly.com/question/30191198

#SPJ1

Answer:

Any Group 2A element (Be, Mg, Ca, Sr, Ba, Ra)

Explanation:

According to the Octet Rule, Sulfur would want to gain two electrons in its outermost shell to achieve an octet (8 total electrons).  The elements that could accomplish this in a one-to-one ratio would be Group 2A on the periodic table (alkaline earth metals).

There are two types of chemical compound one is covalent compound and other is ionic compound, covalent compound formed by sharing of electron and ionic compound formed by complete transfer of electron. Therefore, alkaline earth metals are the suitable elements.

Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion.

An ionic compound is a metal and nonmetal combined compound. Ionic compound are very hard. They have high melting and boiling point because of strong ion bond.

The compound that is ionic in nature can be dissociated very easily in water. Since ionic compounds are polar in nature, they readily dissolve in water.  The elements that could accomplish this in a one-to-one ratio would be  alkaline earth metals

Therefore, alkaline earth metals are the suitable elements.

To learn more about chemical compound, here:

brainly.com/question/26487468

#SPJ2

He could improve the model if he place Earth between the moon and the sun.

We know that the solar system is composed of the sun and the planets and we can have a model of the solar system when we get together the sun and the other parts of the solar system as has been done in the model that was put together by Dwight .

Since the model was intended to show the eclipse of the moon then the model can be improved if he place Earth between the moon and the sun in the image of the  model

Learn more about sun:https://brainly.com/question/12617648

#SPJ1

Answer:

Al + S -> Al2S3

Al and S are the reactants, Al2S3 is the product

Explanation:

The mass of magnesium that reacted with oxygen as determined from the  moles of reactants is is 0.01 g.

The number of moles of oxygen that took part in the reaction with magnesium metal is determined from the volume of oxygen that reacted with the magnesium metal.

The volume of oxygen that reacted with magnesium metal is determined as follows:

The volume of air that reacted with magnesium metal = initial volume - final volume

The volume of air that reacted with magnesium metal = 300 mL - 254 mL

Volume of air = 46 ml

Volume of oxygen in the air = 46 * 20.95%

Volume of oxygen in the air = 9.64 mL

Moles of oxygen = 9.64 * 1 mol/22400 mL

Moles of oxygen = 0.00043 moles

Moles of oxygen = moles of Mg

Moles of Mg = 0.00043

Mass of Mg = 0.00043 moles * 24 g/mol

Mass of Mg = 0.01 g

Learn more about moles at: https://brainly.com/question/13314627

#SPJ1

Compressibility --- A) Gas is squeezed into a small container

Reactivity --- B) Sodium easily combines with chlorine to make salt

Heat of combustion --- C) The burning of coal releases a lot of heat

Reactivity --- D) Gasoline catches fire.

Compressibility is the measure of how much a volume changes when pressure is applied on the gas or liquid substance. In other words we can say that Compressibility is defined as a measure of the volume change of a fluid or solid in response to change in pressure.

So we can conclude that Compressibility --- A) Gas is squeezed into a small container

Reactivity --- B) Sodium easily combines with chlorine to make salt

Heat of combustion --- C) The burning of coal releases a lot of heat

Reactivity --- D) Gasoline catches fire.

Learn more about combustion here: https://brainly.com/question/13251946

#SPJ1

Answer:

Blue 25,000 K

White 10,000 K  

Yellow 6000 K          

Orange 4000 K    

Red     3000 K

Explanation:

k = kelvin

Answer:

3.0 g/cm\(3\)

Explanation:

Answer:

hshssytdtctdyeheb

Explanation:

yye6d66d6d6dududyydydydyehwj2

Approximately 194.0 grams of glucose (C6H12O6) would be required to prepare a 5000 mL solution with a concentration of 0.215 M.

To determine the mass of glucose (C6H12O6) required to prepare a 0.215 M solution in 5000 mL, we need to use the formula:

Molarity (M) = moles of solute / volume of solution (in liters)

First, let's convert the volume of the solution from milliliters (mL) to liters (L):

5000 mL = 5000/1000 = 5 L

Now, we can rearrange the formula to solve for moles of solute:

moles of solute = Molarity (M) x volume of solution (L)

moles of solute = 0.215 M x 5 Lmoles of solute = 1.075 mol

Since glucose (C6H12O6) has a molar mass of approximately 180.16 g/mol, we can calculate the mass of glucose using the equation:

mass of solute = moles of solute x molar mass of solute

mass of glucose = 1.075 mol x 180.16 g/mol

mass of glucose = 194.0 g (rounded to three significant figures)

Therefore, approximately 194.0 grams of glucose (C6H12O6) would be required to prepare a 5000 mL solution with a concentration of 0.215 M. It's important to note that the molar mass of glucose used in this calculation may vary slightly depending on the level of precision required.

For more such questions on glucose visit:

https://brainly.com/question/397060

#SPJ8

Saponification number = (V × M × F × 56.1) / W

Where:

V = volume of HCl used in the back titration

M = molarity of HCl

F = factor of KOH (which is 1 for pure KOH)

W = weight of the butter sample used in grams

First, we need to calculate the amount of KOH used in the saponification reaction:

0.5131 M KOH = 0.5131 moles KOH / liter

25.00 mL KOH = 0.02500 L KOH

moles KOH used = 0.5131 moles/L × 0.02500 L = 0.0128 moles KOH

Since the saponification reaction is a 1:1 reaction between KOH and the triacylglycerol in the butter sample, the amount of butter used is also 0.0128 moles.

Next, we need to calculate the amount of HCl that reacted with the excess KOH:

0.5000 M HCl = 0.5000 moles HCl / liter

10.26 mL HCl = 0.01026 L HCl

moles HCl used = 0.5000 moles/L × 0.01026 L = 0.00513 moles HCl

Since the reaction between HCl and KOH is also a 1:1 reaction, the moles of KOH that were not used in the saponification reaction is equal to the moles of HCl used in the back titration:

moles KOH not used = moles HCl used = 0.00513 moles HCl

To find the saponification number,

Saponification number = (V × M × F × 56.1) / W

Saponification number = (0.01026 L × 0.5000 moles/L × 1 × 56.1) / 2.085 g

Saponification number = 6.50

Therefore, the saponification number for this sample of butter is 6.50.

To know more about Saponification:

https://brainly.com/question/2263502

#SPJ1

Answer: A. absorbs

Explanation:

The correct options that will result in mole are option B, C, and H

To know the options that will result in mole, do the following:

Ideal gas law states as follow:

PV = nRT

Where

PV = nRT

Make n the subject by dividing both sides by RT

n = PV / RT (option B)

Mole, mass and molar mass are related according to the following formula:

Mole = mass / molar mass (option C)

Molarity is defined as mole per unit volume as shown below:

Molarity = mole / volume

Make mole the subject by cross multiplying.

Mole = Molarity × volume (option H)

Thus, from the above illustrations, we can conclude that the correct options which will result in mole are option B, C, and H

Learn more about mole:

https://brainly.com/question/30337259

#SPJ1

Answer: Valency

Explanation:

Note that the above prompt on Ecology draws it's analysis form a well known story which have been told visually called "The Lion King".

The answers are:

1) Biotic Factors, simply put are living things

2 examples of things from Lion King Introduction are:

3) Abiotic factors are Non -living things.

4) Examples from the introduction are:

5) the symbiotic relationship is called: commensalism.

Long-term biological interactions known as commensalism occur when individuals of one species benefit while those of the other species suffer neither advantages nor harm.

Ecology which is the study of the environment, allows  a person  to comprehend how different types of creatures coexist in various kinds of physical settings.

Learn more about Ecology  at:

https://brainly.com/question/30429252

#SPJ1

Full Question:

Although part of your question is missing, you might be referring to this full question:

1) What is Biotic Factors

2) List three biotic factors from the Lion King introduction

3) What is Abiotic factors?

4) List three Abiotic factors from the Lion King introduction

5) The bird riding on the tusks of the elephant feed on insects the elephant stirs up. What kind of symbiotic relationship exists between the two?