Elements 3 to 10 (Li to Ne) show a more or less steady increase in IE. What does this tell you about the energy level that each successive electron (from 3 to 10) is assigned to?

If the element is an ion, the charge should always be shown next to the symbol. For instance, the symbols for sodium and chloride ions are Na+ and Cl-, respectively. We use the terms "cation" and "anion" to describe positive and negative ions, respectively.

The elements are given in the current periodic table in increasing order of atomic number. The number of  protons in an atom's nucleus is referred to as an atomic number. An element's identity is determined by its proton count (i.e., an element with 6 protons is a carbon atom, no matter how many neutrons may be present). How many electrons surround the nucleus depends on the number of protons, and the arrangement of these electrons determines most of an element's chemical behavior.

In a periodic table with rising atomic numbers, elements with similar chemical properties naturally line up in the same column (group).

In contrast, every element in Group 8A is a monatomic gas that is non-reactive and stable at room temperature. For instance, every element in Group 1A is a somewhat soft metal that reacts violently with water and creates 1+ charges. In other words, when an element's mass increases, its properties replicate themselves frequently.

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Answer: 16 g/mol

Explanation: Molarity is Moles/Liters or Mol/L

(0.50 mol/L)(1.30L) = 0.65mol

(cancels out L)

Molar mass is g/mol so...

10.5g/0.65mol = 16.1 g/mol

Rounded to 2 sig figs is 16 g/mol

Answer:

all of the above

Explanation:

Answer:

(A) chlorine is an oxidizing agent in this reaction so it oxidize iodine and it itself is reduced

Explanation:

Cl2 oxi no. = 0 became Cl- oxi no. = -1

so it is reduced

I- oxi no. = -1 became I2 oxi no. = 0

so it oxidized

Explanation:

Ammonia has a formula mass of 17.031 g/mol, so the top blank is 1 and the bottom blank is 17.031

Calculating the product, we get the answer to be 1.5 mol

Answer:

NaHCO₃

Explanation:

Sodium bicarbonate (baking soda) is a chemical compound with the formula NaHCO₃.

The voltage is generated by the pH gradient is 221.7 mv

given that is as follows :

temperature = 25 °C

pH difference = 3.75

ideal pH electrode = 59.16 mV

pH unit change of analyte activity = 3.75× 59.16 = 221.8 mV

voltage generated :

E = (2.303 RT / nF ) ΔpH

E = ( 2.303× 8.314 × 298 / 1 × 96485 ) 3.75

E = 221.7 mV

Thus, When the difference in pH across the membrane of a glass electrode at 25 °C is 3. 75 pH units, voltage is generated by the pH gradient is 221.7 mV.

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Answer:

60

Explanation:

its force x distance

Answer:

1.35moles

Explanation:

mm=18.02gmol⁻¹   mass=24.3g

mole=mass/mm

mole=24.3/18.02

mole=1.35moles

Answer:

Explanation:

To find the number of moles given the molecular weight and mass we use the formula

\(n = \frac{M}{m} \\ \)

where

n is the number of moles

M is the molar mass

m is the mass of the substance

From the question

m = 24.3 g

M = 18.02 g/mol

We have

\(n = \frac{24.3}{18.02} \\ = 1.348501664...\)

We have the final answer as

Hope this helps you

Answer:

m = 0.025 kg

Explanation:

Condensation is the change of state of a substance from vapor to liquid. This involves the specific latent heat of vaporisation of water = 2.25 × 10^6 J/kg

Amount of heat (Q) = mass (m) × Specific latent heat of vaporisation (Lv)

m = Q ÷ Lv

m = (57500 J) ÷ (2.25 × 10^6 J/kg)

m = 0.025 kg

The reaction is exergonic. that is the free energy change delta G for a reaction is -46.11 kJ/mol, the reaction is exergonic.

Chemical thermodynamics, exergonic reactions are chemical reactions in which the change in free energy is negative (there is a net release of free energy).

This shows the spontaneous reaction when the system is closed and the initial and final temperatures are the same.

Reactions can be endergonic or exergonic. Endergonic reactions require heat or energy input. The exergonic reaction is the opposite. it gives off heat. Answer and Explanation:

Reactions with negative values of G are exergonic, meaning they release heat.

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Anna should consume 300 grams of carbohydrates daily.

Who is a physician?

A doctor with a medical degree is referred to as a "physician" in general. Physicians investigate, diagnose, and treat illnesses and injuries in an effort to preserve, promote, and restore health.

Medical professionals identify and treat diseases and injuries. Other obligations include:

If Anna's physician advises that she consume 1200 calories, or (2000*.60), from carbs, then she should consume 60% of her calories from carbohydrates.

Anna should have 300 grams of carbs per day if 1200 calories are equivalent to (1200/4) or 4 calories per gram of carbohydrate.

Therefore, Anna should consume 300 grams of carbohydrate daily

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Answer:300

Explanation:

They tell us that the pressure of the gas is constant and the temperature and volume vary. If we assume that the gas behaves like an ideal gas, we can apply Charles's law, which tells us:

where,

V1 is the initial volume, 3.62L

T1 is the initial temperature, 21.6°C=294.75K

V2 is the final volume, 3.45L

T2 is the final temperature, in Kelvin

Now, we clear T2 and replace the known data:

The temperature at which the volume of the gas is 3.45 L will be 281K

Answer. b) 281K

Answer:

He did this by determining how much the cathode rays were bent when he varied the voltage. He found that the mass of the particles was 2000 times smaller than the mass of the smallest atom, the hydrogen atom. In short, Thomson had discovered the existence of particles smaller than atoms.

Explanation:

J.J. Thomson's experiments with cathode-ray tubes showed that each atom includes tiny negatively charged subatomic debris or electrons. Thomson proposed the plum pudding version of the atom, which had negatively-charged electrons embedded within a definitely-charged "soup."

the electron

In 1897, J.J. Thomson determined the electron by experimenting with a Crookes, or cathode ray, tube. He tested that cathode rays had been negatively charged. further, he also studied definitely charged debris in neon gas.

Thomson, a professor of physics at the college of Cambridge in England, established the life of tiny debris a good deal smaller in mass than hydrogen, the lightest atom. Thomson had located the primary subatomic particle, the electron.

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The correct answer is c. proximal tubule: site of secretion of organic anions and cations.

The proximal tubule is a crucial part of the nephron, which is the functional unit of the kidney. It is responsible for the reabsorption of important solutes and water from the filtrate, as well as the secretion of organic anions and cations. The secretion of these substances is essential for maintaining proper electrolyte balance and eliminating waste products from the body.

The other options provided are not accurately matched with their functions. The ascending limb of the loop of Henle primarily functions in the reabsorption of sodium and chloride ions, not the secretion of potassium (K+). The descending limb of the loop of Henle is involved in the passive reabsorption of water, rather than the transport of solutes. Lastly, the distal tubule plays a role in the fine-tuning of electrolyte balance and regulation of acid-base balance, but the main site of reabsorption of calcium (Ca2+) and magnesium (Mg2+) occurs in the thick ascending limb of the loop of Henle, not the distal tubule.

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A. n = 105 lines/mm = 105000 lines/m

d*sin θ  = m*λ

(1/105000) * sin θ = 1*498*10^-9 ⇒     θ =  3.0 degree

Also  (1/105000) * sin θ = 1*569*10^-9 ⇒     θ =  3.43 degree

Δθ = 3.43° – 3.0°

Δθ = 0.43°

b) Chromatic Resolving power, R = λ / Δλ

λ  / Δλ  =  m (width) n

589 /0.59 = 2 (width) (105000)

Width = 4.75 mm

Diffraction gratings can split beams of different wavelengths into a spectrum of related lines through the principle of diffraction. In certain directions, only waves of certain wavelengths have obtained the rest are destroyed by their respective interference. other.

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Antoine Lavoisier formulated the atomic theory. This statement is False.

While Antoine Lavoisier made significant contributions to the development of modern chemistry, he did not formulate the atomic theory.

The atomic theory was first proposed by the English chemist John Dalton in the early 19th century.

Dalton's atomic theory proposed that all matter is made up of tiny, indivisible particles called atoms, which have unique properties based on their element.

Dalton also suggested that chemical reactions involve the rearrangement of atoms, but do not create or destroy them.

Lavoisier, on the other hand, is best known for his work on the law of conservation of mass and the development of the modern system of naming chemical compounds.

He was a key figure in the transition from alchemy to modern chemistry and made many significant contributions to the field, but he did not formulate the atomic theory.

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ask

ask the question bro, i will be ready to assist.

maths/ch3m/physics/bio

An ionic compound is a type of chemical compound that is composed of two ions held together by electrostatic forces.

A chemical compound is a combination of two or more elements that are chemically bonded together in a specific ratio. Chemical compounds are formed when the atoms of different elements are joined together through chemical bonds, which are formed when at least one atom gives or shares one or more electrons with another atom.

The two ions, a cation and an anion, are usually a metal and a non-metal. The cation carries a positive charge and the anion carries a negative charge. For example, in the ionic compound NaCl, the cation is sodium (Na+) and the anion is chloride (Cl-). In CrCl4, the cation is chromium (Cr4+) and the anion is chloride (Cl-). In NH,Br, the cation is nitrogen (NH+) and the anion is bromide (Br-). In Cu(OH)2, the cation is copper (Cu2+) and the anion is hydroxide (OH-).

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Answer is option C) Have low melting points.

Explanation:

As is common knowledge, small molecules make up molecular compounds, and these small molecules are held together by an intermolecular force. The intermolecular tensions in this situation are incredibly weak and simple to overcome when breaking it. Therefore, molecular compounds have low melting and boiling points because of weak intermolecular interactions.

Chemical substances known as molecular compounds assume the shape of distinct molecules. Examples include common substances like carbon dioxide and water. These substances differ significantly from ionic substances like sodium chloride. When metal atoms give up one or more of their electrons to nonmetal atoms, ionic compounds are created. The resultant cations and anions are drawn to one another electrostatically.

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Answer:

Plants : Cactus, tumbleweed

Animals : camel, fennec fox

Answer:

Desert plant - Cactus & Tumbleweed

Desert animal - Camel & Scorpion

1. ENDOTHERMIC
2. EXOTHERMIC
3. ENDOTHERMIC
4. EXOTHERMIC
5. INPUT OF HEAT ENERGY
6. ENDOTHERMIC
7. EXOTHERMIC

Answer to question 3:
Q = (200g) x (1 cal/g°C) x (100.0°C - 24.0°C) = 15200 calories

Answer to question 6:
The can filled with water should have the greatest change in temperature after five minutes.

Answer to question 7:
Cork would be the best choice for an insulator as it has low thermal conductivity and can trap air pockets, which helps to slow down the transfer of heat.
1. Endothermic processes:
- Dry ice (CO2) subliming
- The input of heat energy
- Vaporizing a block of iron
- Ice melting

2. Exothermic processes:
- Condensing of H2O on the side of a glass
- Water freezing
- Soot being deposited on the walls inside a chimney
- The release of heat energy

Question 5:
To calculate the heat required, use the formula q = m x C x ΔT.
q = 200g x 1 cal/g x (100°C - 24°C) = 200g x 1 cal/g x 76°C = 15,200 calories. So, the answer is 15200 calories.

Question 6:
The can with iron filings should have the greatest change in temperature after five minutes, as metals generally have a higher conductivity and lower specific heat capacity.

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Answer:

2 nitrogen and oxygen+ nitrogen 2

Answer: 3127

Explanation:

The ratio between the maximum and minimum sound intensities that produce a particular loudness is known as the dynamic range.

The specific ratio can vary depending on the loudness level and the individual's perception.For example, the dynamic range for a loudness level of 60 dB may be around 1,000 to 1, meaning the maximum sound intensity is 1,000 times louder than the minimum sound intensity required to produce that loudness level.

However, in general, the dynamic range for human hearing is estimated to be around 120 decibels, meaning that the loudest sound we can tolerate is around 120 dB greater than the quietest sound we can hear.

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When a strip of magnesium metal ignited by a lighter wand produced an intensely glowing white light and as the metal burned out, it was replaced with a white powder-like substance, this process can be explained as chemical change.

When magnesium is ignited, it undergoes a chemical change, and this process is known as reactivity. The chemical properties of the magnesium metal change when it reacts with the oxygen in the air. As a result of this reaction, magnesium oxide is formed.

As magnesium metal burns, it undergoes a chemical change that causes it to release a tremendous amount of heat and light. The emission of light is caused by the energy that is released as the magnesium metal undergoes a chemical change. This process is known as an exothermic reaction.

Magnesium's physical properties have also changed as a result of this chemical change. The magnesium metal ribbon has been transformed into a white powder-like substance. This is a clear indication that the magnesium metal's physical properties have changed as a result of the chemical change. This process is known as a chemical change. This reaction is an example of the chemical change, a process in which substances are transformed into new substances with different chemical properties.

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Answer:

The volume of displaced fluid is equivalent to the volume of an object fully immersed in a fluid.

The correct answer is d) 5.6. Exchangeable H+ ions are those that can be displaced from soil particles by other cations, such as K+.

In this case, the soil was extracted with a 1M KCl solution, meaning that any exchangeable H+ ions would be replaced by K+ ions in the solution.

The fact that the exchangeable H+ concentration in the solution was measured at 2.3 micromolar tells us that the pH of the solution is around 5.6.

This is because pH is a measure of the concentration of H+ ions in a solution, with lower pH values indicating higher H+ concentrations.

Therefore, a soil extracted with a 1M KCl solution and measured to have an exchangeable H+ concentration of 2.3 micromolar would have a pH of approximately 5.6.

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