You perform a titration where you add 0.35 m hcl to a flask containing 50 ml of 0.75 m naoh. what is the ph after you add 50 ml of 0.35 m hcl

Answer:

approximately 1 week

Explanation:

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1 to 2 weeks but if they smell a litte more stink then usually you better get rid of them or they my make you sick. i got sick for old boiled egg from the school cafeteria a long time ago.

Explanation:

The acid-base interactions significantly affect polymer formation when adding solid acids or bases.

What is PVA?

PVA is in produced by polymerization of vinyl acetate followed by hydrolysis of the resulting poly(vinyl acetate)

Physical crosslinking occurs between same PVA molecules via hydrogen bonding between hydroxyl groups or simply entanglements.

An acidic solution has high concentration of hydrogen ions ( H+)

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Answer:

Evaporation

Explanation:

The water evaporated when heat was added causing the water to go.

Answer:

When water is heated the molecules move faster and since they vibrate the evaporate.

Explanation:

sciense :)

Reaction rate: According to the question The order of a is 1 and the order of b is 2.

Reaction rate is the speed at which a chemical reaction occurs. It is closely related to the reactants, products, and the conditions of the reaction, such as temperature, pressure, concentration, and catalysts.

This can be determined by looking at the reaction rate. When the concentration of a is doubled, the reaction rate stays constant. This indicates that the reaction is not dependent on the concentration of a, and therefore its order is 1. When the concentration of b is doubled, the reaction rate doubles. This shows that the reaction is dependent on the concentration of b, and therefore its order is 2.

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Answer:

398 mL

Explanation:

Using the equation for molarity,

C₁V₁ = C₂V₂ where C₁ = concentration before adding water = 8.61 mol/L and V₁ = volume before adding water, C₂ = concentration after adding water = 1.75 mol/L and V₂ = volume after adding water = 500 mL = 0.5 L

V₂ = V₁ + V' where V' = volume of water added.

So, From C₁V₁ = C₂V₂

V₁ =  C₂V₂/C₁

= 1.75 mol/L × 0.5 L ÷ 8.61 mol/L

= 0.875 mol/8.61 mol/L

= 0.102 L

So, V₂ = V₁ + V'

0.5 L = 0.102 L + V'

V' = 0.5 L - 0.102 L

= 0.398 L

= 398 mL

So, we need to add 398 mL of water to the nitric solution.

The following equations shows the ion formation:

NH₄OH → NH₄⁺ + OH⁻

HNO₃ → H⁺ + NO₃⁻

The formation of an ion involves the process of adding or removing one or more electrons from an atom or molecule, resulting in a charged species.

This can occur through a variety of methods, including chemical reactions, exposure to radiation, or the application of an electric field.

From the above question, we can represent the formation of ions in NH₄OH (ammonium hydroxide) and HNO₃ (nitric acid) by the following equations:

NH₄OH → NH₄⁺ + OH⁻

In this equation, ammonium hydroxide dissociates into ammonium cation (NH₄⁺) and hydroxide anion (OH⁻) ions.

HNO₃ → H⁺ + NO₃⁻

In this equation, nitric acid dissociates into hydrogen cation (H⁺) and nitrate anion (NO₃⁻) ions.

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The final answer will give us the volume of liquid bromine formed in milliliters, which represents the amount of bromine that can be used to purify the water at the water park.

To determine the volume of liquid bromine formed when 7.82 x 10^21 formula units of sodium bromide react with excess chlorine gas, we need to use stoichiometry and the balanced chemical equation for the reaction.

The balanced chemical equation for the reaction between sodium bromide (NaBr) and chlorine gas (Cl2) is:

2NaBr + Cl2 → 2NaCl + Br2

From the balanced equation, we can see that the molar ratio between sodium bromide and liquid bromine is 2:1. This means that for every 2 moles of sodium bromide, we can produce 1 mole of liquid bromine.

1. Convert the given formula units of sodium bromide to moles:

Moles of NaBr = 7.82 x 10^21 formula units / Avogadro's number

2. Determine the moles of liquid bromine formed:

Since the molar ratio between sodium bromide and liquid bromine is 2:1, the moles of liquid bromine formed will be half the moles of sodium bromide.

3. Convert moles of liquid bromine to grams:

Grams of Br2 = Moles of Br2 × molar mass of Br2

4. Convert grams of liquid bromine to milliliters:

Volume (mL) = Grams of Br2 / Density of Br

By following these steps, we can calculate the volume of liquid bromine formed. It's important to note that the density of bromine (3.12 g/mL) is used to convert the mass of bromine to volume.

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Answer: It it used for lots of things like a coolant for computers, in medicine to remove unwanted skin, warts and pre-cancerous cells, and in cryogenics, in which scientists study the impact of very cold temperatures on substances.

Explanation:

The following which are medical applications of radiation include the following below:

This is referred to as the transmission of energy through space and it usually occurs at the speed of light thereby making it a very fast method of heat transfer when compared to the others. Radiation are used for various purposes such as immigration for searching luggage etc.

It is also used for medical reasons such as cancer therapy as the radiation help in destroying the cancerous cells thereby making it easy for their removal from the body system. It is also used for genetic engineering in the creation of new types of substances through the modification of nucleic acids such as DNA etc.

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Answer: Nobel gases

i dont know what the options were but i hope that helped

Answer:

Winter

Explanation:

I dont know but whatev

Answer:

Winter

Explanation:

The seasonal cycle in the polar and temperate zones of one hemisphere is opposite to that of the other. Therefore, When it is summer in the Northern Hemisphere, it is winter in the Southern, and vice versa.

hope it helps :)

Answer:

From point, 1 mole of water = molar mass of water =18g 20 moles of water = 18 g x 20 = 360g (iv) From point, 6.022 x 1023 molecules of water = 1 mole = 18g of water 1.2044 x 1025 molecules of water Therefore, points (ii) and (iv) represent 360 g of water.

Brainly is erroneously blocking my answer from being posted due to nonexistent profanity and/or links, so I have attached an image of my written response. Please let me know if you have any problems seeing it.

In a solution, the relative concentrations of hydrogen ions (H+) and hydroxide ions (OH-) determine its acidic, basic, or neutral nature.

In a basic solution, the concentration of hydroxide ions (OH-) is higher than the concentration of hydrogen ions (H+). In an acidic solution, the concentration of hydrogen ions is higher than the concentration of hydroxide ions. In a neutral solution, the concentrations of hydrogen ions and hydroxide ions are equal.

The quantity of hydrogen and hydroxide ions in an aqueous solution affects whether it is acidic or alkaline.

The solution is more acidic the more hydrogen ions it contains. A fall in the pH scale results from an increase in hydrogen ions. The hydrogen ion concentration of the pH scale, which ranges from 0 to 2, is quite high, and as it falls, the pH value rises.

Alkalinity increases as hydroxide ion concentration increases. The pH value rises as the concentration of hydroxide ions increases. The pH range of 12 to 14 indicates a very high level of alkalinity. The pH value rises as the concentration of hydroxide ions does.

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Science is a systematic study of the universe. Option C

Science is a systematic study of the universe. We know that science involves the observance of the occurrences of the universe and the formulation of hypothesis that explain them. These hypothesis can now be con firmed or disproved by the use of experiments.

Thus, the branch of knowledge and the systematic study of the universe and all it encompasses, one that is based upon facts, observation, and experimentation is science Option C.

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11.4 g/cm³ is equivalent to 1 x  10¹⁵ Pg/dal.

To convert 11.4 g/cm³ to Pg/dal, we need to use the following conversions:

1 g/cm³ = 10¹² Pg/dal (pico grams per decaliter)

1 dal = 10 L (decaliter to liter conversion)

First, we can convert grams to pico grams by multiplying by 10¹² :

11.4 g/cm³ x 10¹² Pg/g = 1.14 x 10¹³ Pg/cm³

Next, we need to convert cm³ to the dal. Since 1 cm³ = 0.0001 L, we can divide by 0.0001 L to get dal:

1 cm³ = 0.0001 L

1/(0.0001 L) = 10000 dal/L

So, we can convert cm³ to dal by multiplying by 10000 dal/L:

1.14 x 10¹³ Pg/cm³ x 1 cm³/(11.4 g) x 10000 dal/L = 1 x 10¹⁵ Pg/dal

Therefore, 11.4 g/cm³ is equivalent to 1 x  10¹⁵ Pg/dal.

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The Percent error for ice and salt water is 94.55%. The Percent error for ice water is 100.40%.

Absolute zero is the temperature whereby a system in its balanced state contains the lowest energy that corresponds to -273.15 °C.

Using the formula for Percent error, we have:

\(\mathbf{percent \ error = \dfrac{|experimental \ value| - |actual \ value| }{|actual \ value|} \times 100\%}\)

For ice and salt water:

\(\mathbf{percent \ error = \dfrac{|-14.9 -(-273.15)| }{|-273.15|} \times 100\%}\)

Percent error = 94.55%

For Ice water:

\(\mathbf{percent \ error = \dfrac{|1.1 -(-273.15)| }{|-273.15|} \times 100\%}\)

Percent error = 100.40%

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"the number of ions produced by one formula unit of the electrolyte," refers to the van't Hoff factor (i) in an ideal solution of a strong electrolyte. It represents the extent of dissociation of the electrolyte into ions.

In an ideal solution of a strong electrolyte, the van't Hoff factor (i) represents the number of ions that are produced when one formula unit of the electrolyte dissociates completely in the solution. It is a measure of the extent of dissociation of the electrolyte.

For example, for a strong electrolyte such as sodium chloride (NaCl), when it dissolves in water, it completely dissociates into sodium ions (Na+) and chloride ions (Cl-). In this case, the van't Hoff factor (i) would be 2 because one formula unit of NaCl produces two ions (Na+ and Cl-).

Similarly, for other strong electrolytes, the van't Hoff factor (i) can be determined based on the number of ions produced per formula unit. It is important to note that for non-electrolytes or weak electrolytes, the van't Hoff factor (i) is typically less than 1, indicating partial dissociation or no dissociation in the solution.

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Answer : The volume of kristas rock is 30 mL.

Explanation :

From the given image we conclude that:

Initial volume of liquid = 150 mL

Final volume of liquid = 180 mL

Now we have to determine the volume of kristas rock.

Volume of kristas rock = Final volume of liquid - Initial volume of liquid

Volume of kristas rock = 180 mL - 150 mL

Volume of kristas rock = 30 mL

Therefore, the volume of kristas rock is 30 mL.

At the end of the reaction before adding aqueous \(NaHCO_3\), the following chemical species are likely to be present:

A Lewis structure, also known as a Lewis dot diagram, is a way to represent the chemical bonding in a molecule. It uses dots (also called electron dots or Lewis dots) to show the valence electrons on an atom, and lines to show the bonds between atoms. The goal of drawing a Lewis structure is to use the valence electrons of the atoms in a molecule to form the most stable arrangement of atoms, that is to say, to achieve the octet rule where each atom has 8 valence electrons in its outermost shell.

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Answer:

qui bcuyrbfvcsyfbreyqavb

Explanation:

dnjsfn bsigbeauysbk

In an acid-base titration, the primary standard is a. neither an acid nor a base

The process of analyzing the concentration of an unknown acid or base solution is called titration. A burette is used to accurately measure the volume of a solution. It is critical to use a primary standard in this titration process. A primary standard is a highly pure chemical reagent that has a precisely known molar mass and can be easily stored without decomposing.

A primary standard is a chemical that is neither an acid nor a base. It is either a highly pure acid or a highly pure base. The concentration of a solution can be determined using primary standards since they have a precisely known concentration. Acid-base titrations are an excellent way to determine the concentration of an unknown acid or base solution. As a result, primary standards are required to conduct acid-base titrations.

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The alcohol is used in the thermometers instead of the water because The freezing point of the alcohol is less than -100°C.

Thermometer is the instrument that is used to measure the temperature of the substance which will be present in the liquid state. The freezing point of the alcohol is less than the  - 100 °C, and  we can measure the very low temperature by using an alcohol thermometer.

The expansion of the alcohol is more than as compare to that of the mercury for the same rise or the fall of the temperature, therefore, the  alcohol used in the thermometer can measure the temperature very more accurately.

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Answer:

Answer one:
Solute particles block some of the ability of liquid particles to evaporate. We can then conclude, solutions of solid solutes typically have a lower vapor pressure than pure solvents.

Answer two:
Solutions freezing points are lower than of the pure solvent or solute because freezing (becoming a solid) creates order and decreases entropy.

Answer three:
The presence of solute particles decreases the vapor pressure of the liquid solvent, this means a higher temperature is needed to reach the boiling point.

Explanation:

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Answer:

It is important to know if a resource is renewable or non-renewable because renewable resources are self-sustaining (unlike non-renewable resources). If a non-renewable resource is used too often, that resource may eventually become non-existant. This can also happen to renewable resources, but it is more difficult.

the conjugate acid for each base is conjugate acid of H2PO−4 : HPO4^2-, conjugate acid of SO2−4 : HSO4-, conjugate acid of NH3 : NH4+

A conjugate acid-base pair is a pair of substances that differ by only a proton. An acid is a substance that donates a proton (H+) in a chemical reaction, while a base is a substance that accepts a proton. When an acid loses a proton, it becomes its conjugate base, and when a base gains a proton, it becomes its conjugate acid.For example, the conjugate acid of the base NH3 is NH4+ and the conjugate acid of the base H2O is H3O+. The conjugate acid and the base are in equilibrium with each other, and the acidity constant (pKb) of the base is related to the basicity constant (pKa) of the conjugate acid. In acid-base reactions, the acid donates a proton to form its conjugate base, and the base accepts a proton to form its conjugate acid.

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Answer:

Diffusion is faster at higher temperatures because the gas molecules have greater kinetic energy. Effusion refers to the movement of gas particles through a small hole. Graham's Law states that the effusion rate of a gas is inversely proportional to the square root of the mass of its particles

2S + 302 = 2SO3

Mass of S = 6.3g

Mass of 02 = 10.0g

M(S) = 32g/mol

n = 6.3g/32g/mol

n = 0.195mol

n(S)/n(SO3) = 2/2

Let n(SO3) = x

2(0.195) = 2x

0.39 = 2x

x = 0.195

Therefore, n(SO3) = 0.195mol

But M(SO3) = (32×1) + (16×3)

= 80g/mol

m = 80g/mol × 0.195mol

m = 15.6g