7. Which of the following is not part of the proper protocol for using acids and bases?
A. Wearing protective clothing while handling
B. Storing acids and bases below 10°C
O C. Storing acids and bases in separate areas
D. Add acid to water, not water to acid

Answer:

Air pollution affects the compounds in the air, causing heat to change dramatically over time in the atmosphere.

Answer:

The answer is "23765.4"

Explanation:

Motor weight average number \((\bar{M_n}) = 1000000 \frac{g}{mol}\)

Poly condensation degree dependent on the average number of molecular weights is as follows:

\(DP_n = \frac{\text{Mol.Wt Number Medium}}{\text{Monomer Unit Mol.Wt}}\)

All monomer module, in this case, is propylene  

Sunrise. Unit Wt = Mol. Propylene weight

                           \(= \ Mol. \ Wt \ of \ C_3H_6\\\\= 3 \times 12.01 +6 \times 1.008 \ \ \frac{g}{mol}\\\\= 42.078 \frac{g}{mol}\\\\\)

\(DP_n = \frac{1000000}{42.078}\\\\\)

    \(=23765.4\)

Answer:

Aluminium

Potassium

Answer: Hydrogen

Sodium Magnesium Aluminium

Potassium Calcium Gallium

Rubidium Strontium Indium

Caesium Barium Thallium

Explanation:

Answer:

Warm Springs temperature

Explanation:

The relationship between the rate of diffusion r, and d is r ∝ 1/√d.

The relationship between the rate of diffusion (r) and the density of a gas (d) can be explained using Graham's law of diffusion. According to this law, the rate of diffusion of a gas is inversely proportional to the square root of its density. Mathematically, it can be expressed as:

r ∝ 1/√d

where the symbol '∝' represents 'proportional to'. The constant of proportionality (k) can be introduced to this equation as:

r = k/√d

This equation shows that as the density of a gas increases, its rate of diffusion decreases. This is because denser gases have more molecules per unit volume and thus, they experience greater intermolecular collisions that hinder their movement. Therefore, it requires more energy for them to diffuse through a medium compared to less dense gases.

The relationship between the rate of diffusion and density is particularly important in understanding the behavior of gases in different environments. For instance, in a gas chromatography column, the rate of diffusion of a gas determines how quickly it moves through the column and separates from other components. Similarly, in the Earth's atmosphere, the rate of diffusion of greenhouse gases such as carbon dioxide affects their concentration and hence, their impact on climate change.

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When cyclic ester is reacted with ethyl alcohol in presence of heat and acidic medium, ethyl hexanoate is formed. The structure of ethyl hexanoate is attached in image.

Lactones are the name for cyclic esters. The COOH and OH groups that unite to generate water in these instances are a component of the same molecule.

German chemist Leopold Gmelin likely abbreviated the word "ester" from the German Essigäther, "acetic ether," when he first used it in 1848.

First, carbonyl oxygen abstracts a proton. The production of an ester on one side of the chain and alcohol on the other follow the attack of the ethyl molecule on the carbonyl carbon.

Thus, ethyl hexanoate is formed as a product.

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The strand 1 of hydrocarbons is used to produce plastic, hence option D is correct.

Raw resources like natural gas, oil, or plants that have been processed into ethane and propane are used to make plastics. The subsequent "cracking" procedure uses heat to transform ethane and propane into ethylene and propylene. To produce various polymers, these components are mixed.

Propylene is a substance found in large quantities in petroleum. In order to speed up chemical processes, refiners combine heated propylene with a catalyst to create plastic. Propylene molecules start to cluster together like beads on a thread as a result.

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Answer:

Sulfuric acid (American spelling) or sulphuric acid (Commonwealth spelling), also known as oil of vitriol, is a mineral acid composed of the elements sulfur, oxygen and hydrogen, with molecular formula H2SO4. It is a colorless, odorless and viscous liquid that is miscible with water.

Calcium nitrate is produced by applying nitric acid to limestone and then adding ammonia. It is known as a double salt, since it is comprised of two nutrients common in fertilizers which are high in sodium. The processed result also looks crystallized like salt.

Sucrose is common sugar. It is a disaccharide, a molecule composed of two monosaccharides: glucose and fructose. Sucrose is produced naturally in plants, from which table sugar is refined. It has the molecular formula C₁₂H₂₂O₁₁.

Explanation:

BRO YOU CAN TRUST ME XD ♥️♥️

Answer: 3 hydrogen atoms

Explanation: H=hydrogen

Answer:

the second one

Explanation:

because all of them are under

Answer:

Explanation:

mass -  15.8 g = 0.0158 kg

volume = 32.5 - 22.5 = 10.2 ml

density = mass / volume

= 0.0158 / 10.2

= 0.00154 kg/ml

hope this helps

plz mark as brainliest!!!!!!!

Answer:

The amswer would be A due to the ratio between ethane and carbon dioxide being 1:2. Due to this, you double the moles that are reacting

Answer:

That there appears to be many stars in the sky

Explanation: hope this helps! <33333

Answer:

Carbon dioxide and hydrogen monoxide

Answer

CO2 = 494 mmHg

H2 = 190 mmHg

HCl = 41.04 mmHg

HF = 21.28 mmHg

SO2 = 12.92

H2S = 0.76 mmHg

Explanation

Given:

Composition in mole percent of the gases are:

65% CO2, 25% H2, 5.4% HCl, 2.8% HF, 1.7 % SO2 and 0.1% H2S.

The total pressure of the volcanic gas = 760 mmHg

What to find:

The partial pressure of each of these gases.

Solution:

The partial pressure of each of the gases can be calculated using the % composition and the total pressure.

For 65% CO2

Its partial pressure = (65/100) x 760 mmHg = 494 mmHg

For 25% H2

Its partial pressure = (25/100) x 760 mmHg = 190 mmHg

For 5.4% HCl

Its partial pressure = (5.4/100) x 760 mmHg = 41.04 mmHg

For 2.8% HF2

Its partial pressure = (2.8/100) x 760 mmHg = 21.28 mmHg

For 1.7% SO2

Its partial pressure = (1.7/100) x 760 mmHg = 12.92 mmHg

For 0.1% H2S

Its partial pressure = (0.1/100) x 760 mmHg = 0.76 mmHg

Answer:

2H₂O (liq) + 2e⁻⇒ H₂ (g) + 2OH⁻ (aq)

Explanation:

In reduction-oxidation reaction two reactions take place, one is oxidation and the other is reduction reaction. In an oxidation reaction, there is the loss of an electron whereas in the reduction reaction there is gain of electron occus.

Reduction reaction occurs on the cathode, in a reduction of water there is gain of 2 electrons to gaseous hydrogen in basic aqueous solution. half-reaction for the reduction of liquid water to gaseous hydrogen in basic aqueous solution-

2H₂O (liq) + 2e⁻⇒ H₂ (g) + 2OH⁻ (aq)

Answer: a) A decrease in the solubility of an ionic compound as a result of the addition of a common ion : Common ion effect

b) The mass of a salt in grams that will dissolve in 100 mL of water: Solubility

c) A solution that has dissolved the maximum amount of a compound at a given temperature. Any further addition of salt will remain undissolved: Saturated solution

d) The product of the molarities of the dissolved ions, raised to a power equal to the ion's coefficient in the balanced chemical equation : Solubility product constant

e) The maximum number of moles of a salt that will dissolve in 1 L of solution : Molar solubility

Explanation:

Solubility is expressed usually as the mass of solute per 100 grams or 100 ml of solvent.

Molar solubility of a solid is expressed as the concentration of the dissolved solid in a saturated solution.

Solubility product constant is defined as the equilibrium constant in which a solid ionic compound is dissolved to produce its ions in solution. It is represented as \(K_{sp}\)

The common-ion effect is the decrease in solubility of a sparingly soluble salt by the addition to the solution of a soluble compound with an ion in common with the precipitate.

Saturated solution is defined as the solution in which no more solute particles can be dissolved in the solvent.

Answer: Frequency

Explanation: Without a doubt my answer is Frequency, none of the other options have nothing to do with sound waves so Frequency is my best bet.

Answer:

14.61g

Explanation:

A 1 M solution corresponds to 1 mole of the solute (here, sodium chloride, NaCl) in 1 L of solvent (here probably water). Since the question calls for only making 250 mL, or 1/4 of a L, only 1/4 or 0.25 mol will be required. The molecular weight of NaCl is 58.44 g/mol so you will need:

0.25 mol * 58.44 g/mol = 14.61 g

Answer:

it digest are food

Explanation:

the digestive system helps to digest are food, ot also breaks down the food with acid in our stomach.

Answer:

Ca = 40.1 g

Cl = 35.5

40.1 + 35.5×2

40.1 + 71

111.1 g

Answer:

Explanation:

The kinetic energy of an object can be found by using the formula

\(k = \frac{1}{2} m {v}^{2} \\ \)

m is the mass

v is the velocity

From the question we have

\(k = \frac{1}{2} \times 3 \times {2}^{2} \\ = \frac{1}{2} \times 3 \times 4 \\ = 3 \times 2\)

We have the final answer as

Hope this helps you

300.0 ml of 0.10 m CaCl₂ of the following solutions contains the greatest number of ions, assuming all these salts dissociate completely.

An is an atom or collection of atoms where the number of electrons and the number of protons are different. A positive ion, also known as a cation, is a particle that exists when the flow of atoms exceeds the number of protons. Ions are electrically charged particles that are created either by taking electrons out of neutral atoms to make positive ions or adding protons to neutral atoms to produce negative ions. The quantity of protons remains constant during the formation of an ion.

The number of moles in 300. mL of 0.10 M CaCl₂ is:

0.300 L * 0.10 Mol L = 0.030 mol

Each mole of CaCl₂ contains 3 moles of ions (1 Ca²⁺ and 2 Cl⁻). The moles of ions in 0.030 moles of CaCl₂ are:

0.30molNaCl * 3mol Ions / 1 mol NaCl = 0.90 mols

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The piece of evidence that best identifies the type of reaction as nuclear or chemical is: Chemical, because a new substance is formed. Option 4

In this scenario, the observation that a new substance is formed is a key characteristic of a chemical reaction. Chemical reactions involve the rearrangement of atoms to form different substances with distinct properties. The formation of a new substance indicates a chemical change has occurred.

The other pieces of evidence listed do not necessarily point to a nuclear reaction:

Chemical, because energy is released during the reaction: Energy can be released in both nuclear and chemical reactions, so this observation alone is not sufficient to determine the type of reaction.

Nuclear, because energy is released during the reaction: While energy can be released in nuclear reactions, it is not exclusive to them. Chemical reactions can also release energy, such as in exothermic reactions.

Nuclear, because the mass decreased after the reaction: This observation suggests a change in mass, which could be indicative of a nuclear reaction. However, it is important to consider that chemical reactions can also involve changes in mass, such as the formation of gases or dissolution of a solid.

Overall, the most conclusive evidence to identify the type of reaction is the formation of a new substance, which aligns with a chemical reaction.

Option 4

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Answer:

I don't know because I don't know about chemistry

The amount of water needed to be added to a 8.6317 M NaCl solution to obtain a 1.0421 M solution starting with 4.7869 liters of solution would be 34.8629 L.

The problem here has to do with dilution. The dilution principle states that the number of moles of solute in a solution is constant before and after dilution.

In other words, the dilution principle can be mathematically expressed as:

\(m_1v_1\) = \(m_2v_2\).

Where \(m_1\) and \(m_2\) are molarities before and after dilution; \(v_1\) and \(v_2\) are volumes before and after dilution.

In this case:  \(m_1\) = 8.6317 M,  \(m_2\)= 1.0421 M,  \(v_1\)= 4.7869 L. We are to determine v2.

\(v_2\) = \(m_1v_1\)/ \(m_2\)

    = 8.6317x4.7869/1.0421

    = 39.6498 L

If the final volume of the solution is 39.6498 L and the starting volume is 4.7869, then the amount of water needed can be calculated as:

39.6498 - 4.7869 = 34.8629 L

Thus, the amount of water that will be added to the original solution in order to arrive at the diluted solution is 34.8629 L.

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Answer: 46.8 mol

Explanation:

From the equation, we know that for every mole of oxygen consumed, 2 moles of water are produced.

This means that the answer is 23.4(2)=46.8 mol

The Safety Data Sheet (SDS) for regular bleach can be obtained from the manufacturer or supplier of the specific brand or product. It contains important information regarding the hazardous properties, handling, storage, and emergency procedures related to the bleach.

An SDS typically includes details such as the product's chemical composition, physical and chemical properties, potential hazards to health and the environment, precautionary measures for safe handling and storage, first-aid procedures, and information about proper disposal. It also provides guidance on personal protective equipment (PPE) to be used when handling the product and steps to take in case of accidental release or exposure.

The SDS serves as a crucial resource for understanding the potential risks associated with the use of regular bleach and helps ensure that appropriate safety measures are implemented. It is important to review and follow the information provided in the SDS to minimize the risk of accidents, injuries, or adverse health effects associated with the use of the product.

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