In each pair, choose the larger of the indicated quantities or state that the samples are equal:
(e) Total ions: 2.3 mol of sodium chlorate or 2.2 mol of magnesium chloride

Answer:

The number following the name of the element is the number of subatomic particles inside the nucleus of the atom. This means that it is the mass number of the isotope. The average atomic mass of the element is the sum of the products of the percentage abundance and mass number of the naturally occurring isotopes.

Since, the average atomic mass of the hydrogen is nearest to 1 then, the most abundant isotope should be hydrogen-1.

Explanation:

The representative elements are in columns A1 - A7. In an 18 column table the map is as follows:

A1 = column 1, hydrogen + alkali metals have 1 valence

A2 = column 2, alkaline earth metals have 2 valence

A3 = column 13, Boron family have 3 valence

A4 = column 14, Carbon group have 4 valence

A5 = column 15, Nitrogen family have 5 valence

A6 = column 16, Oxygen column - chalcogens have 6 valence

A7 = column 17, Fluorine column - halogens have 7 valence

The group number of the representative elements = the number of valence electrons.

Answer:

D.1350

Explanation:

Because 5×3=15 and 450×3=1350

The volume of the 70.72 milliliters of isopropanol are in a 93.8 ml sample of the rubbing alcohol solution. This is calculated by using the volume percent concentration.

We have to use the volume by volume percent concentration, v/v%, to to calculate the milliliters of isopropanol which is the solute that are present in the sample.

We know that the volume by volume percent concentrations is that they are meant to represent the number of milliliters of solute present for every 100 mL of solution given.

75.4 % v/v isopropanol is equals to 75.4 mL isopropanol in 100 mL in the solution. That means we can use the volume of the solution by volume percent concentration in order to calculate the number of milliliters of isopropanol present in 75.4mL of  the solution.

Volume of the solute / 93.8 of the solution = 75.4mL solute / 100ml solution

Calculating this we get volume of the solute = 70.72 ml

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Answer:

2:a-heterogenous

b-homogenous

c-heterogenous

d-heterogenous with water

3:Filtration is used to separate insoluble particles from a solution

Distillation is used to separate liquids with close but different boiling points e.g water and ethanol

Explanation:

2: homogenous mixtures form a uniform layer meaning that a mixture containing more than one layer is heterogenous

Answer: left Mg 6, right Mg 1

Left P 4, right P 4

Balanced no

Explanation:

Answer:

8

Explanation:

The atomic number refers to the number which identifies the element, which is the proton number.

From thermal comfort point of view, thick walled structures are beneficial in hot and humid climates is the statement that is true.The correct option is C.

Thick walled structures are beneficial in hot and humid climates from the thermal comfort point of view.How do thick walled structures help in hot and humid climates - In hot and humid climates, thick walls tend to absorb the heat present in the environment. This absorption helps to keep the interior of the structure cool.

Additionally, thick walls take more time to heat up and more time to cool down. Thus, in hot and humid climates, thick walls are a better choice than thin walls because they provide thermal comfort.

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The liquid with a total mass of 88.30 grams and a volume of 165.0 milliliters has a density of: 0.5351 g/ml

To solve this problem the formula and the procedure that we have to use  is:

d = m/v

Where:

Information about the problem:

Applying the density  formula we get:

d = m/v

d = 88.30 g/165.0 ml

d = 0.5351 g/ml

It is a physical quantity that expresses the ratio of the body mass to the volume it occupies.

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Answer:

The main characteristics of glass are transparency, heat resistance, pressure and breakage resistance and chemical resistance.

Explanation:

I hope this help

Mark me brainliest

Answer:

I need a picture to help

Explanation:

Answer:

beryllium has a higher ionization energy because its radius is smaller. boron has a higher ionization energy because its radius is smaller.

The concentration of the solution is .10M

Here given,

V1 = 5.Oml

M1 = .20M

V2 = 10.0ml

We have to find M2

For determining a missing dilution equation value, where M1 and M2 are the molarities of the solutions, expressed in mol/L or M, and V1 and V2 are the volumes of the solutions.

By applying V1M1 = V2M2

By substituting values,

(5.0 ml)(0.20 M) = (10.0 ml) (x M)

x = (5.0)(0.20)/10.0

x = 0.10 M

The fact that one begins with 100. ml and ends with 3.0 ml has no bearing on the final concentration. It would influence the total number of moles of HCl present but not the concentration.

Therefore the concentration of solution is .10M.

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The weight percentages of sodium chloride is 23.1 % and water is 76.9 % in the solution. The theoretical density of the initial concentrated solution is 0.30 g/mL.

The mass of the sodium chloride = 30 g

The mass of the water = 100 mL = 100 g

The total mass = 30 + 100

                         = 130 g

The mass percentage of sodium chloride = (30 / 130 ) × 100 %

                                                                        = 23.1 %

The weight percentage of the water = ( 100 / 130 ) × 100 %

                                                             = 76.9 %

The density of the solution = mass / volume

                                             = 30 / 100

                                            = 0.30 g/mL

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Answer:

The group 1 elements are all soft, reactive metals with low melting points. They react with water to produce an alkaline metal hydroxide solution and hydrogen.

Explanation:

Neutral having no preference or tendency to move one way or the other; neither acid nor base.

An atom in a molecule is given a formal charge (FC) if all chemical linkages involve equitable sharing of electrons among all atoms, regardless of their relative electronegativity.

[Number of valence electrons] = formal charge - [electrons in lone pairs Plus 1/2 the number of bonding electrons]

For carbon, there are 4 valence electrons.

There are two non-bonded electrons (it has a lone pair)

There are three bonds encircling carbon.

Consequently, formal charge = 4 - (2 + 3) = 4 - 5 = -1.

Formally, C in CH3 has a negative 1 charge.

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Answer:

what are you saying ma guy?

Explanation:

Valences have the greatest tendency to form ions, are, +1,-1,+2,-2,+3,-3. All the options are correct.

Valence is the number of electrons lost or gained in a reaction to complete an element's outer energy level.

When an atom gains or loses a valence electron, it forms an ion. Atoms form ions in order to help another to obtain a full octet and to stabilize the valence.

Some atoms gain or lose electrons to form ions because they need to become more stable. They sometimes give them to have an outer shell or gain them to get a closer charge to eight.

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Answer:

+1,-1,+2,-2,+3,-3

Explanation:

Answer:

Light bulbs

Explanation:

light waves are electromagnetic waves which can travel through a vacuum

They change the composition of matter to change the properties of matter.

There is matter all around you. All matter is made up of very small particles, including atoms and molecules. The objects you see and touch on a daily basis were constructed from those atoms. Anything that has mass and occupies space (has volume) is considered matter.

The quantity of matter in an item is its mass. A statue made of lead (Pb) or another little object with a lot of mass may be present. You might have a massive object with a small mass.

Additionally, you ought to be aware of the distinction between matter and weight. Weight is a measure of gravity's pull, whereas mass is a measure of the substance of an object.

Thus, They change the composition of matter to change the properties of matter.

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Sebacic acid (HOOC−(CH2)8−COOH) is a naturally occurring dicarboxylic acid found in urine. A 200 mg sample of sebacic acid crystals would have the highest solubility in a dilute aqueous solution of (d) water. 

A dicarboxylic acid is an organic compound which has two carboxyl functional groups (-COOH) and a general formula of CnH2n-2O4. They are a kind of carboxylic acid. Some dicarboxylic acids occur naturally, but most are produced synthetically. Sebacic acid is one of those dicarboxylic acids that occurs naturally and is found in urine. It is HOOC−(CH2)8−COOH in chemical form.

A dilute aqueous solution of water is expected to have the highest solubility for a 200 mg sample of sebacic acid crystals. Solubility refers to the capacity of a substance to dissolve in a solvent to form a homogeneous solution. It is mostly expressed as the amount of the solute that can dissolve in a given amount of solvent at a particular temperature.

Seabacic acid is a polar molecule due to its two carboxyl functional groups which gives it the potential to form hydrogen bonds with water molecules.

Hydrogen bonds increase the solubility of a compound. Ethanol, Hydrochloric acid, and Sodium hydroxide are also polar substances, but their polarity is lower than that of water. So, a dilute aqueous solution of water is the best option for the highest solubility of a 200 mg sample of sebacic acid crystals.

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Answer: I think you did nothing wrong

Explanation: I think you did nothing wrong

Explanation:

1. The gaseous exchange in the lungs occurs in the alveoli. They are tiny air sacs at the end of the bronchioles (tiny branches of air tubes in the lungs). The alveoli are where the lungs and the blood exchange oxygen and carbon dioxide during the process of breathing in and breathing out.

To prevent the growth of Clostridium botulinum (C. botulinum) bacteria, which is a common foodborne pathogen, it is important to maintain a low pH. The growth of C. botulinum is inhibited in acidic environments.

The recommended pH range to prevent the growth of C. botulinum is typically below 4.6. This value is often considered the critical pH for controlling the growth and toxin production of C. botulinum in food. Food preservation methods, such as canning or acidification, aim to achieve pH levels below 4.6 to ensure the safety of the food and prevent the growth of C. botulinum spores, which can produce the dangerous botulinum toxin. It's important to note that the specific pH requirements to inhibit C. botulinum growth may vary slightly depending on factors such as temperature, oxygen availability, and the presence of other inhibitory factors in the food. Therefore, it's crucial to follow proper food safety guidelines and consult relevant regulatory authorities for specific pH recommendations for different types of food products.

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Answer:

1.Liquids have less force of attraction between molecules than solids and more than gases; gases have a very weak force of attraction between the molecules which is the least amongst the three states of matter. 2.Liquids have definite volume; gases do not have definite volume.

Explanation:

:) HOPE THIS HELPS

Answer:

particles

Explanation:

particles are buzzing around very quickly when in a gas, but when in a liquid they vibrate.

Answer:

Fifth trust me

Explanation:

Precipitates are insoluble ionic solid products of a reaction, formed when certain cations and anions combine in an aqueous solution. The determining factors of the formation of a precipitate can vary.

Additive is the  type of combination of two chemicals produces an effect that is equal to their individual effects taken together. Thus, option (A) is correct.

As the baseline effect in approaches assessing whether medications have a synergistic impact, the additive effect can be utilized to identify synergy. A synergistic effect is comparable to an additive effect in that it has a bigger combined effect than the additive effect.

When two medications are combined, it can generate a 2+2 > 4 effect. Although the synergistic impact is more prevalent, the additive effect may be detected in the majority of combination medicines. If the combined impact of two pharmaceuticals in combination treatment is less than the total of the effects of the two drugs working separately, this is referred to as an antagonistic effect, and the drugs are rarely prescribed together in the same therapy.

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The equilibrium constant is the value of the reaction quotient obtained from the chemical equilibrium equation. Therefore,  K for H⁺(aq) + F(aq) ⇄HF(aq) is 15.2.

The equilibrium constant is the value of the reaction quotient obtained from the chemical equilibrium equation. It is affected by ionic strength and temperature, but is unaffected by the amounts of products and reactants in a solution.

For a process in homogeneous equilibrium, all of the reactants and products are within the same phase. For example, all of the species may be liquids, or all of them could be gases.

HF(aq)⇄H⁺(aq) + F(aq) K = 6.8x104

H⁺(aq) + F(aq) ⇄HF(aq)  K = 1/6.8x104=15.2

Therefore,  K for H⁺(aq) + F(aq) ⇄HF(aq) is 15.2.

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