A solution with a pH of 11 has a [H] of:
11
1x 10-3
1x 10-11
1x 1011
1x 103

Answer:

NaBr(s) → Na+ (aq) + Br– (aq)

Explanation:

Dissociation refers to the separation of an ionic compound or molecule into its constituent ions when dissolved in water. The ions with their respective charges make up the ionic compound, hence, an ionic compound is said to dissociate when the respective cations (+ charge) and anions (- charge) are released in an aqeous solution.

In this case, NaBr(s) or Sodium bromide is an ionic solid {signified by the (s) sign}. Upon dissolving in water, NaBr(s) breaks down into the ionic charges that makes it up i.e dissociates. The balanced ionic equation is as follows:

NaBr(s) → Na+ (aq) + Br– (aq)

Note: 1 mole of the solid ionic compound dissociates into one sodium ion (Na+) and one bromide ion (Br–).

The balanced dissociation equation for the compound, NaBr is:

NaBr(s) —> Na⁺(aq) + Br¯(aq)

NOTE:

Dissociation will only occurs when the compound is dissolved in water

The dissociation equation for NaBr can be written as follow:

From the equation above, we can see that the ions that makes up NaBr are clearly seen. Hence, the above equation is the dissociation equation for NaBr.

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Answer:

neutrons = 71

protons = 6

electrons = 6

Explanation:

Hope this works :)

Answer:

ability to rust

Explanation:

i'm like 90% sure thats correct

Answer:

Mass = 0.014 g

Explanation:

Given data:

Mass of HCl = 0.500 g

Mass of hydrogen gas produced = ?

Solution:

Chemical equation:

Zn + 2HCl       →      ZnCl₂ + H₂

Number of mole of HCl :

Number of moles = mass/molar mass

Number of moles = 0.500 g / 36.5 g/mol

Number of moles = 0.014 mol

Now we will compare the moles of HCl with hydrogen.

            HCl           :            H₂

              2             :            1

           0.014         :           1/2×0.014 = 0.007

Mass of hydrogen gas:

Mass = number of moles × molar mass

Mass =  0.007 mol × 2 g/mol

Mass = 0.014 g

Answer:

concentration is the abundance of a constituent divided by the total volume of a mixture.

Answer:

how was enacting the GI bill Like teaching someone how to fish

Answer:

measured

Explanation:

no way can they pin point exactly when something lived when its in the millions

Answer:

The real acidity of milk is due to lactic acid. This is never found in milk when it is first drawn from the udder. It is produced by the action of the lactic acid organisms on the milk sugar. The so-called apparent acidity of milk is what gives fresh milk its acid reaction.

2) The heat capacity of aluminum is 219.44 J/mol.°C.

3) a) the experimental ΔHs of ice is -0.154 kJ/mol.

b) too high

Calculate the heat released by the aluminum:

q = mcΔT

where q = heat released, m = mass of aluminum, c = specific heat capacity of water and ΔT = change in temperature.

q = (24.7 g) (0.903 J/g°C) (100.0°C - 23.4°C)

q = 18643.26 J

Next, calculate the heat absorbed by the calorimeter:

q = mcΔT

q = (99.5 g + 24.7 g) (15.8 J/°C) (23.4°C - 19.5°C)

q = 4009.92 J

The heat released by the aluminum is equal to the heat absorbed by the calorimeter and water:

18643.26 J = 4009.92 J + q3

where q3 = heat absorbed by the water.

q3 = 14633.34 J

Calculate the molar heat capacity of aluminum:

Cp,m = q3 / (nΔT)

where Cp,m = molar heat capacity, n = number of moles of aluminum, and ΔT = change in temperature.

n = m / M

where m = mass of aluminum and M = molar mass of aluminum (26.98 g/mol).

n = 24.7 g / 26.98 g/mol

n = 0.916 mol

Cp,m = 14633.34 J / (0.916 mol * 76.6°C)

Cp,m = 219.44 J/mol.°C

Therefore, the heat capacity of aluminum is 219.44 J/mol.°C.

3) (a) To calculate the experimental ΔHs of ice, we first need to calculate the heat gained by the water and the heat lost by the ice during the process.

Heat gained by water = mass of water × specific heat capacity of water × change in temperature

= 100.0 g × 4.184 J/g·°C × (-20.1°C)

= -8,423.84 J

Heat lost by ice = mass of ice × heat of fusion of ice

= 25.6 g × 6.01 kJ/mol

= 154.496 J

Since the process is assumed to be adiabatic (no heat exchange with the surroundings), the heat gained by the water must be equal to the heat lost by the ice.

Thus, -8,423.84 J = 154.496 J = -8,269.344 J

The negative sign indicates that the process is exothermic. Therefore, the experimental ΔHs of ice is:

ΔHs = -154.496 J/mol = -0.154 kJ/mol

(b) If the student forgets to include the calorimeter term in the calculation, the calculated ΔHs of ice will be too high. This is because the heat absorbed by the calorimeter during the process is not accounted for, leading to an overestimation of the heat gained by the water and underestimation of the heat lost by the ice.

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ANSWER

The initial volume of the solution is 70mL

EXPLANATION

Given that;

The initial concentration of the solution is 15.0% m/v

The final volume of the solution is 350mL

The final concentration of the solution is 3.0% m/v

Follow the steps below to find the initial volume of the solution.

Step 1; Apply the dilution formula

Substitute the given data into the above formula

Therefore, the initial volume of the solution is 70mL

Answer:

a. The Zn and HCl both retained their identity.

Answer:

2.5 moles of KOOH are produced.

Explanation:

1)Given data:

Number of moles of KOOH produced = ?

Number of moles of LiClO = 5 mol

Solution:

Chemical equation:

2LiClO +  KHSO₄     →      Li₂SO₄ + Cl₂ + KOOH

now we will compare the moles of KOOH and LiClO.

                 LiClO          :          KOOH

                    2              :              1

                   5               :             1/2×5 = 2.5

2.5 moles of KOOH are produced.

Zara should attend a webinar in identifying Drugs by Using Light (option A) if she wants to learn more about spectrophotometry.

Measuring concentrations present within solutions can be achieved by utilizing spectrophotometry - an approach that utilizes light as its primary mechanism. Its significance in identifying and measuring drugs located in samples continues to grow across numerous research areas due to its effectiveness.

Central to this method is recognizing how distinct substances absorb varying amounts of light dependent on their particular electronic structures on specific wavelengths.

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Answer:

Atoms are electrically neutral because they have equal numbers of protons (positively charged) and electrons (negatively charged).

Explanation:

1. The IUPAC name of N is nitrogen.

2. Nitrogen dioxide

3.The IUPAC name of O is oxygen

4.The IUPAC name of OH is hydroxyl.

The IUPAC name of ·0 is a radical. It is commonly found in organic chemistry and plays an important role in many reactions.

IUPAC names for the given compounds are:1.1. N: Nitrogen

The IUPAC name of N is nitrogen.

It is a non-metal and belongs to group 15 in the periodic table. It has an electronic configuration of 1s2 2s2 2p3.1.2. NO2: Nitrogen dioxide

Explanation: NO2 is a chemical compound that is formed by the combination of nitrogen and oxygen. It is a reddish-brown gas that has a pungent odor.

The IUPAC name of NO2 is nitrogen dioxide.1.3. O: Oxygen

Explanation: The IUPAC name of O is oxygen.

It is a non-metal and belongs to group 16 in the periodic table. It has an electronic configuration of 1s2 2s2 2p4.

X: UnknownExplanation: No IUPAC name can be given to an unknown compound as the structure and composition are not known.

Y: Hydroxyl Explanation: The IUPAC name of OH is hydroxyl.

It is a functional group that is composed of an oxygen atom and a hydrogen atom (-OH). It is commonly found in alcohols and phenols. ·0: RadicalExplanation: A radical is a molecule or an ion that contains an unpaired electron.

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Note: The complete question is given below

Provide the IUPAC names for the following compounds:

\(CH_3CH_2CH(CH_3)CH_2CH_2CH_2CH_3\)

C6H5CH(CH3)2

H2NCH2CH2CH2CH2CH2NH2

CH3CH2CH2CH2CH2OH

CH3CH2CH2CHOHCH3

Answer:

-3.28 × 10⁴ J

Explanation:

Step 1: Given data

Step 2: Calculate the work (w) done by the gaseous mixture

We will use the following expression.

w = -P × ΔV = -P × (Vf - Vi)

w = -27.0 atm × (100.0 L - 88.0 L)

w = -324 atm.L

Step 3: Convert w to Joule (SI unit)

We will use the conversion factor 1 atm.L = 101.325 J.

-324 atm.L × 101.325 J/1 atm.L = -3.28 × 10⁴ J

The concept balanced equation is used here to determine the amount of Tin (II) fluoride produced from 30.00g of hydrogen fluoride. The mass of SnF₂ is 117.5 g.

A chemical equation which obeys the law of conservation of mass in which the mass of the reactants is equal to the mass of the products on either side of the reaction is known as the balanced equation.

The balanced equation for the given reaction is:

Sn + 2HF → SnF₂ + H₂

Here 1 mole of SnF₂ is produced from 2 mole of HF. The molar mass of SnF₂ is 156.71 g and that of HF is 20 g.

30 g HF × 1 mol HF / 20 g HF × 1 mol SnF₂ / 2 mol HF × 156.71 g SnF₂ / 1 mol SnF₂ = 117.5 g SnF₂

Thus the mass of Tin (II) fluoride is 117.5 g .

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173 degrees Celsius is extremely hot and would feel scorching and painful. It is well above the boiling point of water (100 degrees Celsius), so any contact with surfaces at this temperature would cause severe burns.

In more detail, at 173 degrees Celsius, the air would be unbearably hot, making it difficult to breathe. Your skin would feel a burning sensation immediately upon contact with any object or surface heated to this temperature. It would be similar to touching a hot stove or a blazing fire. The intense heat would quickly penetrate your skin, causing deep burns and potentially permanent damage. Extreme caution and protective measures are necessary to avoid such high temperatures, as they pose a significant risk to health and safety. It is important to stay away from such extreme temperatures to prevent serious harm.

In summary, 173 degrees Celsius would feel extremely hot and would cause severe burns upon contact with objects or surfaces at this temperature. The air would be scorching and difficult to breathe, making it essential to avoid exposure to such extreme heat for the sake of personal safety.

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Answer:

Wavelength

Explanation:

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A combustion reaction is a type of chemical reaction that involves the rapid combination of fuel (typically a hydrocarbon) with oxygen, resulting in the release of energy in the form of heat and light.

Combustion reactions are often characterized by the presence of a flame and the production of carbon dioxide (CO₂) and water (H₂O) as products.

In the given balanced combustion reaction:

C₂H₂ + 5O₂ → 4H₂O + 2CO₂

The stoichiometric ratio indicates that 1 mole of C₂H₂ reacts with 2 moles of CO₂ produced. Therefore, if 4.44 moles of C₂H₂ react, we can calculate the moles of CO₂ produced using the ratio:

Moles of CO₂ = (4.44 mol C₂H₂) × (2 mol CO₂ / 1 mol C₂H₂)

Moles of CO₂ = 8.88 mol

Therefore, 8.88 moles of CO₂ will be produced in the combustion reaction.

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Answer:

18.8 g Citric acid

Explanation:

We have a 5.00% (w/v) citric acid solution, that is, there are 5.00 grams of citric acid every 100.0 mL of the solution. We can use dimensional analysis to calculate the grams of citric acid in 375 mL of the 5.00% (w/v) solution.

375 mL Solution × (5.00 g Citric acid/100.0 mL Solution) = 18.8 g Citric acid

Answer:

I think cold front if not than its c

Answer:

True

Explanation:

Because the definition of inference is a conclusion reached on the basis of evidence and reasoning.

Answer: A fire itself is the result of a chemical reaction known as combustion, where fuel and oxygen react with one another and atoms rearrange themselves irreversibly. For this to occur, fuel must reach its ignition temperature, and combustion will continue if there is enough fuel, heat and oxygen

State of matter of both substance will be liquid at 115C.

A substance-A substance's melting point is 100 degrees Celsius. Thus, liquid material A will arise from temperatures over 100 degrees. Since material A is liquid at 115 degrees Celsius, the particles are free to migrate and glide over one another.

B Substance-It has a  freezing point of 110 degrees Celsius. This signifies that substance B will exist in a liquid condition at any temperature greater than 110 °C. In a liquid condition, the components of solution B will also be sufficiently mobile to travel past one another.

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Answer:

yes

Explanation:

140g/mol

The mass of silicon is expressed according to the formula:

Given the following parameters

• Moles of silicon = 5.0moles

• Molar mass of silicon = 28g/mol

Substitute the given parameters into the formula

Hence the mass of silicon is 140g/mol

Answer:

1.520

1.333

15.899

Explanation:

its very easy

N = n x No

No = avogadro's number = 6.02 x 10²³

n = mol

a. 9.52 x 10²⁶ : 6.02 x 10²³ = 1.58 x 10³ (3 sig figs)

b. 7.81 x 10²² : 6.02 x 10²³ = 1.30 x 10⁻¹ = 0.130 (3 sig figs)

c. 2.5 x 10²³ : 6.02 x 10²³ = 0.42 (2 sig figs)