I GIVE 40 POINTS PLZ ANSWER

Order the following aqueous solutions from lowest freezing point to highest freezing point: 1 M NaNO3, 1 M Li3PO4, 1 M Ca(NO3)2, 1 M C6H12O6s

The statement is correct. The photoelectric effect refers to the phenomenon where electrons are ejected from the surface of a material when it is exposed to light. The frequency of light striking an electron in a metal must be above the threshold frequency in order for the photoelectric effect to occur.

The statement is correct. The photoelectric effect refers to the phenomenon where electrons are ejected from the surface of a material when it is exposed to light. However, for the photoelectric effect to occur, the frequency of the incident light must be above a certain threshold frequency.

The threshold frequency is the minimum frequency of light required to dislodge electrons from the material. Below this threshold frequency, regardless of the intensity or duration of the light, no electrons will be emitted.

This behavior can be explained by the particle-like nature of light, where light is composed of discrete packets of energy called photons. The energy of a photon is directly proportional to its frequency. Only photons with energy greater than or equal to the binding energy of the electrons in the material can dislodge them.

Therefore, the frequency of light striking an electron in a metal must be above the threshold frequency in order for the photoelectric effect to occur.

For more question on photoelectric

https://brainly.com/question/1458544

#SPJ8

Answer:

B2Br6

Explanation:

The pressure of the gas in the vessel will be 10.92 atm

The Ideal gas equation gives the relationship between gas pressure, volume, number of moles and temperature.

The Ideal gas equation is given below:

where

From data provided

P = 13.15 atm; V = 10.0 L; T = 21°C = 294 K

R = 0.082?057 L.atm/K.mol

making n subject of formula to find initial number of moles of oxygen gas

n = PV/RT

n = 13.15 x 10/0.082?057 x 294

n = 5.45 moles oxygen at start

The equation for the combustion of hexane is given below:

2 C6H14+ 19 O2 --> 12 CO2 + 14 H2O

Number of moles of hexane in 9.45 g

Number of moles = mass/molar mass

molar mass of hexane = 86 g

Number of moles of Hexane = 9.45/86

Number of moles of hexane = 0.11 moles

2 moles of hexane reacts with  19 moles of oxygen

0.11 moles of hexane will react with 0.11 × 19/2 moles of oxygen

 1.045 mole O2 will be used up

Moles of oxygen left = 5.45 - 1.045

Moles of oxygen left = 4.405 moles

2 moles of hexane produces 12 molesof CO2

0.11 moles of hexane produces 0.11 × 12/2

0.11 moles of hexane produces 0.66 mole CO2

Total moles of gas = 4.406 + 0.66 = 5.065 mole of gas in a 10 L container at -10°C

From ideal gas equation;

P = nRT/V

P = 5.065 × 0.082× 263/10

P = 10.92 atm

Therefore, the pressure of the gas in the vessel will be 10.92 atm

Learn more about ideal gas equation and gas pressure at: https://brainly.com/question/12873752

Answer:

sosksjsjjs

Explanation:

even i know how to type şïllily

a) In the reaction \(H_2CO_3 + CN^- = HCN + HCO^{3-}\), \(H_2CO_3\) acts as an acid by donating a proton (\(H^+\)) to \(CN^-\).

b) In the reaction \(F^- + HSO_4^{-} = HF + SO_4^{2-}\), \(HSO_4^{-}\) acts as an acid by donating a proton (\(H^+\)) to \(F^-\).

c) In the reaction \(HSO_4^- + H_2O = H_3O^+ + SO_4^{2-\), \(HSO_4^{-}\) acts as an acid by donating a proton (\(H^+\)) to \(H_2O\).

a) The acid is both an Arrhenius acid (produces \(H^+\) ions in water) and a Bronsted-Lowry acid (donates a proton to a base).

b) The acid is both an Arrhenius acid (produces \(H^+\) ions in water) and a Bronsted-Lowry acid (donates a proton to a base).

c) The acid is a Bronsted-Lowry acid (donates a proton to a base) but not an Arrhenius acid because it does not produce \(H^+\) ions in water. However, the \(H_3O^+\) ion that is formed can be considered an Arrhenius acid because it produces \(H^+\) ions in water.

For more question on proton click on

https://brainly.com/question/17351413

#SPJ11

Answer: If the ΔEN is between 1.6 and 2.0 and if a metal is involved, then the bond is considered ionic. If only nonmetals are involved, the bond is considered polar covalent.

Explanation:

Answer:

Q = -1.318 KJ

Explanation:

We will use the assumption that this solution acts like water and thus we will use the specific heat capacity of water and when converting from mL to g, we will use the conversion like we do for water.

We are told that 50 mL of HCl reacts with 100 mL of NaOH.

Thus total mass; m = 50 + 100 = 150 mL

Converting to grams gives 150 g since we have assumed that the solution behaves like water.

We are given;

Initial temperature; T_i = 21.3° C

Final temperature; T_f = 23.4° C

ΔT = 23.4 - 21.3

ΔT = 2.1°C

Formula for quantity of heat is;

Q = mcΔT

c is specific heat capacity.

We will use c = 4.184 J/g°C since the solution is assumed to behave like water.

Thus;

Q = -(150 × 2.1 × 4.184)

Q = -1317.96 J

Negative sign is used because temperature was raised and thus reaction is exothermic.

Approximation to KJ gives; -1.318 KJ

Answer:

Ca3(PO4)2

Explanation:

Ca3(PO4)2 or calcium phosphate is insoluble in water.

Answer: A model would be useful because the model makes the concepts easier to understand.

Explanation:

Models are helpful tools in science education that can be used to enhance explanations, spark discussion, make predictions, provide visual representations of abstract concepts, and create mental models.

Answer:

\(pOH=11.2\)

Explanation:

Hello,

In this case, by knowing that the pOH is defined in terms of the concentration of OH⁻ as shown below:

\(pOH=-log([OH^-])\)

We directly compute with the given concentration:

\(pOH=-log(6.5x10^{-12})\\\\pOH=11.2\)

Moreover, fur such pOH, the pH will be:

\(pH=14-11.2=2.8\)

Which means that such solution is an acid solution.

Best regards.

Answer:

11.2

Explanation:

The Earth’s tilt changes its position relative to the stars and constellations as the Earth rotates around its axis.

N5+ + 2e →N³

here Nitrogen gains electron so, its reduction half-reaction

20²- → 0₂

here oxygen loss electron so, its oxidation half-reaction

20² → 20₂ + 4e¯​

here oxygen loss electron so, its oxidation half-reaction

2N5+ + 4e¯ → 2N³

here nitrogen gains electron so, its reduction half-reaction

To know more about  oxidation visit : https://brainly.com/question/13003361

#SPJ9

You need to know the reaction's standard enthalpy change, standard entropy change, and temperature in order to calculate the value of Kp at a specific temperature.

The equilibrium constants for a perfect gaseous mixture are Kp and Kc. When equilibrium concentrations are represented in terms of atmospheric pressure and Kc is the equilibrium constant, Kp is the equilibrium constant utilized.

The equilibrium constant, as defined by the "Law of Chemical Equilibrium," is the ratio of product of product concentration to product of reactant concentration. The stoichiometric coefficient in the balanced chemical equation increases with each concentration term.

To know more about enthalpy visit:-

https://brainly.com/question/13996238

#SPJ1

the volume of ammonia produced at STP.

Mass of hydrogen is 32.6g

Molar mass of H2 = 2 g/mol

Moles of H = 32.6g/2g/mol = 16.3mol

N2(g) + 3H2(g) —-> 2NH3(g)

The Mole ratio of H to NH3 is 3 : 1

32.6 mole of H = 1/3 x 16.3= 10.87 mol = 5.43mol

Moles of NH3 = 5.43mol

At STP moles = volume/molar volume, but molar volume = 22.4L/mol

Moles = volume/molar volume, volume = moles X molar volume

Volume = 5.43 mol x 22.4L/mol

= 121.63 L

Volume of NH3 = 121.63L

Answer:

Explanation:

% yield = (actual yield / theoretical yield) X 100

For this question,

% yield = (150g/ 162 g) X 100 = 92.6%

Answer:

92.6%

Explanation:

7.19 is pKnet for the net reaction in which water plus dissolved carbon dioxide form hydrogen ions plus bicarbonate ions

The balanced reaction would be: H+ + HCO₃- ⇌ H₂CO₃

The equilibrium constant for the reaction is:

Keq = [H₂CO₃]/[H+][HCO₃-] = 10^(pKnet) = 7.94 × 10⁻⁷

Using the equilibrium constant, we can set up an expression for x:

Keq = [H₂CO₃]/[H+][HCO₃-] = x/[(2.48 × 10⁻² - x)(1.8 × 10⁻²)]

x = 6.43 × 10 ⁻⁸ M

Therefore, the final concentration of H+ is 6.43 × 10⁻⁸ M, and the pH is:

pH = -log[H+] = -log(6.43 × 10⁻⁸) = 7.19

So the pH decreases from the average value of 7.4 to 7.19

The acidity or basicity of a solution is measured by its pH. It is the concentration of hydrogen ions in the solution as a negative logarithm (base 10) The pH scale ranges from 0 to 14, with 0 representing the most acidic condition, 7 representing neutral conditions, and 14 representing the most basic.

The total amount of dissolved inorganic carbon in a solution, including bicarbonate ions and carbon dioxide , is referred to as the carbonate pool. Blood plasma contains the carbonate pool, which serves as a buffer and contributes to pH stability in biological systems.

To learn more about blood:

brainly.com/question/14781793

#SPJ1

The number of solute (stock solution) needed are 15 mL solute and the number of solvents (water) is needed 10 ml. The correct option is a.

Molarity is the measure of the concentration of any solute per unit volume of the solution.

Given that the 25 mL of a 60 mg/mL solution

Dose in hand = 0.5 g / 5ml =

500 mg / 5ml = 100 mg/ml

D= 60 mg x 25 = 1500 mg

Molarity = n / V

1500 mg / 100 mg/ml = 15 ml solute

The number of solutes then minus by the total stock supply

15 - 5 ml = 10 ml solvent

Thus, the correct option is a. 15 mL solute; 10 mL solvent.

To learn more about molarity, refer to the link:

https://brainly.com/question/14562993

#SPJ1

6) Magnitude of the rate of constant is E) 230.

7) The overall order is  D) 3.

To find the rate constant, use the rate law equation for this reaction:

rate = k[ClO₂]²[OH⁻]

Using any of the three experiments to solve for k. Experiment 1:

0.0248 M/s = k(0.060 M)²(0.030 M)

Solving for k:

k = 229.6296 ≈ 230

To determine the overall order of the reaction, add up the exponents in the rate law equation. In this case, the overall order is 2 + 1 = 3.

Learn more on rate constant here: https://brainly.com/question/26127112

#SPJ1

Answer:

Idon't know if this helps but I think it is a linear structure and if I am wrong I am so sorry

Answer:

2 HCl + Ba(OH)₂ ⇒ BaCl₂ + 2 H₂O

Explanation:

In a complete neutralization reaction, an acid reacts with a base to form neutral salt and water. To form barium chloride, hydrochloric acid (acid) reacts with barium hydroxide  (base). The balanced chemical equation is:

2 HCl + Ba(OH)₂ ⇒ BaCl₂ + 2 H₂O

Answer:

As altitude increases, the amount of gas molecules in the air decreases the air becomes less dense than air nearer to sea level.

Explanation:

Answer:divide

Explanation:this is not science this is math dont be lazy just divide

Answer:

I would say 4.) Biomass

Explanation:

This looks like the best possible answer because it is plant based. Worst case scenario we could run out of plants. In comparison, wind will pretty much always be around along with wave/tidal power and solar.

The decomposition of aspirin (acetylsalicylic acid,\(C_{9} H_{8} O_{4}\)) can occur through the hydrolysis reaction, resulting in the formation of acetic acid (\(CH_{3} COOH\)) and salicylic acid (\(C_{7} H_{6}O_{3}\)).

The decomposition of aspirin (acetylsalicylic acid, \(C_{9} H_{8} O_{4}\)) can occur through the hydrolysis reaction, resulting in the formation of acetic acid (\(CH_{3} COOH\)) and salicylic acid (\(C_{7} H_{6}O_{3}\)). To determine the moles of each product formed, we need to consider the balanced chemical equation for the reaction:

\(C_{9} H_{8} O_{4} = > C_{7} H_{6}O_{3} +CH_{3} COOH\)

From the equation, we can see that for every 1 mole of aspirin, 1 mole of salicylic acid and 1 mole of acetic acid are produced.

Therefore, the moles of salicylic acid and acetic acid formed will be equal to the number of moles of aspirin that decomposes. If we know the amount of aspirin in moles, we can directly calculate the moles of each product based on stoichiometry.

For more question on aspirin

https://brainly.com/question/25794846

#SPJ8

In the reaction 239/93 Np -> 239/94 Pu + X, the symbol "X" represents an electron. Option C is correct.

This reaction involves the radioactive decay of Neptunium-239 (239/93 Np) into Plutonium-239 (239/94 Pu). Specifically, it undergoes beta decay, which involves the emission of an electron.

During beta decay, a neutron in the Neptunium-239 nucleus is converted into a proton, and an electron (also known as a beta particle) is emitted. The electron carries a negative charge (-1) and is represented by the symbol "e^-" or simply "e". It balances the charge and atomic number in the reaction equation.

The balanced equation for the reaction is:

239/93 Np -> 239/94 Pu + 0/-1 e

So, in summary, the symbol "X" in the reaction 239/93 Np -> 239/94 Pu + X represents an electron (e^-) emitted during the beta decay of Neptunium-239.

For more question on electron click on

https://brainly.com/question/26084288

#SPJ11

COMPLETE QUESTION

in the reaction 239/93 Np -> 239/94 Pu+X, what does X represent

A. PROTON

B. POSITRON

C. ELECTRON

D. NEUTRON

The moles of Cl₂(g) will be present at equilibrium is 3.94 × 10⁻⁴ mol

To determine the number of moles of Cl₂(g) at equilibrium, we need to use the given equilibrium constant (Kₑ) and the initial concentrations of CO(g) and COCl₂(g).

Given:

[CO(g)] = 0.3500 mol

[COCl₂(g)] = 0.05500 mol

Kₑ = 1.2 × 10²

The balanced equation for the reaction is:

CO(g) + Cl₂(g) ⇌ COCl₂(g)

Let's denote the number of moles of Cl₂(g) at equilibrium as x. At the start, we have [Cl₂(g)] = 0 mol, but it will change by x at equilibrium.

Using the equilibrium expression, we can write:

Kₑ = [COCl₂(g)] / ([CO(g)] * [Cl₂(g)])

Plugging in the values:

1.2 × 10² = [COCl₂(g)] / (0.3500 * [Cl₂(g)])

To solve for [Cl₂(g)], we need to isolate it on one side of the equation:

[Cl₂(g)] = [COCl₂(g)] / (0.3500 * Kₑ)

Now, let's substitute the given values:

[Cl₂(g)] = 0.05500 / (0.3500 * 1.2 × 10²)

[Cl₂(g)] ≈ 3.94 × 10⁻⁴ mol

Therefore, approximately 3.94 × 10⁻⁴ moles of Cl₂(g) will be present at equilibrium.

Know more about moles here:

https://brainly.com/question/29367909

#SPJ8

The question was Incomplete, Find the full content below:

Starting with 0.3500 mol CO(g) and 0.05500 mol COCl₂(g) in a 3.050-L flask at 668 K, how many moles of Cl₂(g) will be present at equilibrium

CO(g) + Cl₂(g) ⇄ COCl₂(g)  Ke 1.2 x 10^{2} at 668 K

Answer:

300×175=52500

Explanation:

caculator

Answer:

\(m_{H_2O}=9.24gH_2O\)

Explanation:

Hello there!

In this case, since there is a 2:2 mole ratio between sodium peroxide and water according to the given reaction, it is possible to apply the following stoichiometric setup for the calculation of the required mass of water:

\(m_{H_2O}=40.0gNa_O_2*\frac{1molNa_O_2}{78gNa_O_2}*\frac{2molH_2O}{2molNa_O_2} *\frac{18.02gH_2O}{1molH_2O} \\\\m_{H_2O}=9.24gH_2O\)

Best regards!