What color is a mirror?

Atoms of different element can not have same atomic number because only same type of atoms combine to form element. Atoms belonging to different element can have different atomic number. Therefore, blanks can be filled as below.

Element generally consist of atoms or we can atoms combine to form element. Atoms of an element is always same, means all the properties of all atoms of one type of element is same. Two or more than two atoms with different physical or chemical properties can not combine together to form an element.

isotopic    Atomic   atomic mass   number of  number of   number charge

notation  number   number           protons      electrons     neutrons

Cl             17              35                  17                 17                 18                  0

Al⁺¹            13              27                  13                 13                 14                +1

Rh             45              101               45                   45               56                0

N-15          7                15                 7                     7                8                   0

Therefore, blanks can be filled as above.

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Answer: Fluorine has the highest ionization enthalpy.

Explanation: This is because the ionization energy decreases from top to bottom and increases from left to right. Also, ionization enthalpy is the amount of energy required by an isolated gaseous atom to lose an electron in its ground state.

Since fluorine needs just one atom to attain noble gas configuration so it will not want to lose any electron and hence a high amount of energy will be required to remove an electron from it.

Considering the definition of molar mass, the amount of moles of CaF₂ in 75.5 g of CaF₂ is 0.968 moles.

The molar mass of substance is a property defined as the amount of mass that a substance contains in one mole.

The molar mass of a compound is the sum of the molar mass of the elements that form it multiplied by the number of times they appear in the compound.

In this case, you know the molar mass of the elements is:

The molar mass of the compound CaF₂ is calculated as:

CaF₂= 40 g/mole + 2× 19 g/mole

Solving:

CaF₂= 78 g/mole

You can apply the following rule of three: If by definition of molar mass 78 grams of the compound are contained in 1 mole, 75.5 grams of the compound are contained in how many moles?

moles= (75.5 grams× 1 mole) ÷78 grams

moles= 0.968 moles

Finally, the amount of moles is 0.968.

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In the below acid-base conditions, starvation will cause severe alkalosis without respiratory correction.

The helps in proper that make it up respiration are as follows: Pulmonary ventilation is the process of forcing air into and out of the lungs. External respiration is the process through which dioxide and oxygen are transferred from the lung to tissues. internal respiration, cellular gas exchange, and blood flow through systemic capillaries.

Respiratory diseases can be brought on by infections, smoking, exposure to smoke exposure, asbestos, radiation, and other forms of air pollution. Some of respiratory conditions include allergies, chronic obstructive pulmonary disease (COPD), respiratory failure, bronchitis, and lung cancer.

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Reactivity series:-

\(\setlength{\unitlength}{0.8 cm}\begin{picture}(20,15)\thicklines\put(5,9.5){\large {\boxed{ \sf{Reactivity \: series}}}}\put(0.8,8){\large\sf K \qquad\qquad\qquad Potassium\qquad\qquad\qquad \: maximum}\put(0.8,7.2){\large\sf Na \qquad\qquad\qquad Sodium\qquad\qquad\qquad\quad \: reactivity}\put(0.8,6.2){\large\sf Ca\qquad\qquad\qquad \: Calcium}\put(0.8,5.2){\large\sf Mg\qquad\qquad\quad \: Magnesium}\put(0.8,4.2){\large\sf Al\qquad\qquad\qquad \: Aluminium\qquad\qquad\qquad \: decreasing}\put(0.8,3.2){\large\sf Zn\qquad\qquad\quad\qquad \: Zinc\qquad\qquad\qquad\qquad \:reactivity}\put(0.8,2.2){\large\sf Fe\qquad\qquad\quad\qquad Ferrous}\put(0.8,1.2){\large\sf Pb\qquad\qquad\qquad \: \:\: Lead}\put(0.8,0.2){\large\sf H\qquad\qquad\qquad \: \:Hydrogen}\put(0.8, - 0.6){\large\sf Cu\qquad\qquad\qquad \: Copper}\put(0.8, - 1.5){\large\sf Hg\qquad\qquad\qquad \: Mercury}\put(0.8, - 2.5){\large\sf Ag\qquad\qquad\qquad \: \:Silver}\put(0.8, - 3.5){\large\sf Au\qquad\qquad\qquad \: \: Gold\qquad\qquad\qquad\quad \: \: minimum reactivity}\put(9.3,8.2){\vector(0, - 2){12}}\end{picture}\)

#1

Ag is found as too less reactive so

#2

No element in universe can displace potassium (K) from its solution as it's most reactive .

#3

Fe is also a reactive metal.

So

#4

#5

#6

#7

#8

#9

#10

#11

As Ca is third most reactive metal

#12

Answer:

They are directly related.

Temp decrease then volume decrease

Temp increase then volume increase

Edible mushrooms: Consuming edible mushrooms is safe and provides health advantages like fiber, vitamins, and minerals.

Non-Edible mushrooms: Mushrooms that cannot be eaten could be harmful or have unappealing flavors and textures that could be harmful if consumed.

Metal carbonyls are characterized as volatile, low-melting-point compounds. They are created from the compound Mx(Co)y, which upon heating breaks down into metal and carbon monoxide. Contact with the skin can make them toxic.

In some cases, such as in nickel tetracarbonyl (Ni(CO)4), these complexes are homoleptic and only contain CO ligands, but more frequently, metal carbonyls are heteroleptic and contain a variety of ligands. Mononuclear metal carbonyls have a single metal atom at their core.

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1. The states of the three substances and the strengths of the forces between the particles for each of the three substances are described as follows:

2. Given the information on room temperature and the temperature of the hot pan stove,  it can be concluded that the melting point of sugar is less than the melting point of salt.

3. Considering the melting points of sugar and salt, as well as the states of sugar, salt, and oil at room temperature, the nature of the attractive forces between particles in the three substances can be described as follows:

The attractive forces between particles of a substance are the forces that exist between the particles of the substance that keep the particles of the substance close to each other.

The stronger the attractive forces between particles of a substance, the more orderly the structure of the substance will be.

Solids have the highest attractive forces between their particles

Liquids - have the next highest attractive forces between their particles

gases - have the lowest attractive forces between their particles

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Option B, Metals have good conductivity.

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Answer:

Yes it is a colligative Property

Explanation:

There is freezing point depression, boiling point elevation, Osmotic Pressure, Vapor Pressure Lowering

Carbon 14 would be your answer, however if it's more than one answer it would also be Carbon 12, so yeah. Your best bet would be Carbon 14.

The best description of carbon sequestration is that it is the process of removing CO2 from the atmosphere and storing it underground or in biomaterials such as trees and plants. This corresponds to option a.

Carbon sequestration plays a vital role in mitigating climate change by reducing the concentration of CO2, a greenhouse gas, in the atmosphere.

Through various methods such as reforestation, afforestation, and carbon capture and storage (CCS) technologies, CO2 is captured and stored long-term, preventing its release into the atmosphere.

Storing CO2 underground involves injecting it into geological formations like depleted oil and gas reservoirs or deep saline aquifers.

Additionally, plants absorb CO2 through photosynthesis, converting it into biomass, which can be stored in forests, soils, and other organic materials.

Carbon sequestration offers a potential solution to help offset anthropogenic carbon emissions and limit their impact on the climate system, contributing to the global efforts to combat climate change. This corresponds to option a.

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The specific gravity of the glycerin, given that the mass of a calibrated flask is 25.0 g, is 1.26

First, we shall determine the volume of the caliberated flask by obtaining the volume of the water. This shown below:

Volume = mass / density

Volume of water = 50 / 1

Volume of water = 50 mL

Thus, the volume of the caliberated flask is 50 mL

Next, we shall determine the density of the glycerin. This shown below:

Density = mass / volume

Density of glycerin = 63 / 50

Density of glycerin = 1.26 g/mL

Finally, we shall determin the specific gravity of the glycerin. Details below:

Specific gravity of glycerin = Density of glycerin / Density of water

Specific gravity of glycerin = 1.26 / 1

Specific gravity of glycerin = 1.26

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This surface to volume ratio of a descending droplet in a gravity pull is what causes the droplets to be spherical. Remember that the volume to surface area ratio of a sphere is low.

What size water droplet is the smallest?

The lowest cluster with a tri structure and nicknamed the tiniest water droplet, the freshwater hexamer (H2O)6, is the subject of research by Richardson et al (3). Its structural properties have been experimentally determined thanks to advanced spectroscopic techniques (4).

How big is a droplet?

A average raindrop measures 2 centimeters (2000 microns) is size, a large aerosols particles is 100 microns across, a tiny aerosol particles is 1 micron across, and a cloud droplet is typically 20 microns across.

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A small amount of heat Q flows from a system A at high temperature (350K) to a system B at low temperature (250K). If Q = 0. 5 J, mA = 1. 2 kg, and mB = 0. 6 kg, the total entropy change of the system be 0.00057J/K.

Firstly we will be taking Q as a positive number,

Then, the entropy lost by A is Q/TA

= (-0.5 J)/(350 K)

= -1/700 J/K

= -0.00143 J/K.

Now, the entropy gain by B is Q/TB

= (0.5 J)/(250 K)

= 1/500 J/K

= +0.00200 J/K.

Therefore, the total entropy change of the system will be the the sum of entropy lost by A and entropy gain by B.

Hence the total entropy would be =0.00057 J/K.

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Answer:

AlCl3 + Fe = Al + FeCl2

Chemical Equation Details aluminum chloride + iron = aluminum + iron(ii) chloride

\(\text{Balanced reaction:}\\\\2\text{Al} + 3\text{FeCl}_2 \longrightarrow 3\text{Fe} + 2\text{AlCl}_3\)

Answer:

the answer is below

Explanation:

Cirrus clouds form from the ascent of dry air, making the small quantity of water vapour in the air undergo deposition into ice (to change from a gas directly into a solid). Cirrus is made up completely of ice crystals, which provides their white colour and form in a wide range of shapes and sizes.

Answer:

Ions.

Explanation:

An ion is any atom or group of atoms that bears one or more positive or negative electrical charges. Positively charged ions are called cations and negatively charged ions, anions.

Atoms with a positive or negative charge are called as ions. If the atoms possess positive charge it is known as a cation, if the atoms possess a negative charge it is known as an anion.

An ion is any atom or group of atoms that bears one or more positive or negative electrical charges.

A positive or negative electric charge is present in an atom or group of atoms due to the loss or gain of one or more electrons (such as a free electron). Having a net electrical charge makes an atom or molecule an ion. By convention, the charge of an electron is thought to be negative, and this charge is equal to and the opposite of the charge of a proton, which is thought to be positive.

A positively charged ion is a cation (atoms or groups of atoms that have more protons than electrons due to having lost one or more electrons). Negatively charged ions are known as anions (meaning they have more electrons than protons due to having gained one or more electrons).

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The question should be

What are Atoms with a positive or negative charge called?

The power radiated by the radiator changes by a factor of 14.1573 when the temperature is increased from 27°C to 54°C.

The formula that relates the power radiated by an object with the fourth power of the temperature is known as the Stefan-Boltzmann Law. It is stated as follows: P = σA(T⁴), where P is the power radiated, σ is the Stefan-Boltzmann constant (5.67 × 10⁻⁸ W/m²K⁴), A is the surface area of the radiator, and T is the temperature in Kelvin.

We must first convert the temperature to Kelvin:

TK = T°C + 273.15

TK1 = 27°C + 273.15 = 300.15 K

TK2 = 54°C + 273.15 = 327.15 K

The factor by which the power radiated changes is the ratio of the power at the new temperature to the power at the original temperature. The equation is as follows:

P2/P1 = (T2/T1)⁴

Substituting the given values:

P2/P1 = (327.15/300.15)⁴

P2/P1 = 1.8856⁴

P2/P1 = 14.1573

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The image that is shown is the gain of two electrons by the oxygen atom.

We have to note that when we talk about the term "ion" we are talking about such a specie that can be formed by the loss or gain of electrons. Thus an ion is positive if it formed by the loss of electrons and the ion is negative if it is formed by the gain of electrons.

In the case of the image that we have here, we can see that there is again of two electrons by the oxygen atom and this is how we form the oxygen ion that has ten electrons and eight protons.

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Answer:

C6H6

Explanation:

Just use the table method to find the ratio of C to H and then compare the RMM with that of the empirical formula.

Answer:

C6H6

Explanation:

We divide each percentage by the relative atomic mass of the element:

Carbon:  92.31 / 12.011 = 7.68

Hydrogen:  7.69 / 1.008 = 7.63

So the ratio of carbon to hydrogen is 1:1.

Empirical formula is CH  - which has a  MM of 13.019

The RMM is 78 so the molecular formula = 78/13.019 = 6 * CH

So it is C6H6  (Benzene).

The potential energy diagram for the reaction N02(0) -> JN2(9) + 02(9) should be a curve that descends from reactants to intermediates and then ascends to products, with a label indicating that ΔH = -33.1 kJ/mol.

A potential energy diagram of a reaction is a graph that demonstrates the progress of a reaction and the changes in potential energy that occur over time. The vertical axis of the diagram shows potential energy, and the horizontal axis shows reaction progress. Reactants are shown on the left, intermediates are shown in the middle, and products are shown on the right. The reaction pathway is depicted with a curve that descends from reactants to intermediates and then ascends to products. Labeling the enthalpy of a reaction involves identifying its enthalpy change. The enthalpy change (ΔH) of a reaction is the heat absorbed or given off by the system at a constant pressure. The reaction N02(0) -> JN2(9) + 02(9) has ΔH = -33.1 kJ/mol. The reaction is exothermic because the enthalpy change is negative.

The potential energy diagram for this reaction should be a curve that descends from reactants to intermediates and then ascends to products. The enthalpy change should be labelled in the diagram. If the enthalpy change is negative, then it should be labelled as a negative value. If the enthalpy change is positive, then it should be labelled as a positive value.

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Explanation:

any zero coming last after any decimal point is not recognized as a number hence .0030 is equivalent .003 therefore there is only one significant figures in the number .0030

a. 1

The relationship between transmittance (T) and absorbance (A) is given by the equation:

A = -log10(T)

To find the corresponding absorbance values at the two ends of the scale, we can substitute the transmittance values into the equation.

For 0.0010 % transmittance:

A = -log10(0.0010)

For 100 % transmittance:

A = -log10(1)

Since the log of 1 is 0, the absorbance at 100 % transmittance is 0.

Calculating the absorbance values for the given transmittance values will provide the corresponding values at the two ends of the scale.

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Answer:

C

Explanation:

You would have to use 11 milliliters of the stock solution of 5.00 mm HNO3 to prepare 0.200 L of 0.550 mm HNO3.

To calculate the volume of the stock solution required, we can use the formula:

C1V1 = C2V2

Where C1 is the concentration of the stock solution, V1 is the volume of the stock solution needed, C2 is the desired concentration of the final solution, and V2 is the final volume of the solution.

In this case, the concentration of the stock solution (C1) is 5.00 mm HNO3 and the desired concentration of the final solution (C2) is 0.550 mm HNO3. The final volume of the solution (V2) is 0.200 L.

Plugging these values into the formula, we have:

(5.00 mm HNO3)(V1) = (0.550 mm HNO3)(0.200 L)

Solving for V1, we get:

V1 = (0.550 mm HNO3)(0.200 L) / (5.00 mm HNO3)

V1 = 0.011 L

To convert this volume to milliliters, we multiply by 1000:

V1 = 0.011 L * 1000 mL/L

V1 = 11 mL

Therefore, you would have to use 11 milliliters of the stock solution of 5.00 mm HNO3 to prepare 0.200 L of 0.550 mm HNO3.

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Answer: Organic acids form when a carboxyl group (−COOH) is substituted for one of the hydrogen atoms in a hydrocarbon.

The % mass of copper in your product will be 3.93 %.

Calculated slope = 64.52

Mass of copper product = 0.059 g

Initial volume (V1) = 25 ml

Final volume (V2) = 100 ml

Absorbance (A) = 0.374

% mass of copper = ?

To find out the concentration (C) we use the following equation

C = A / slope

Put the values

C (M2) = 0.374 / 64.52

C (M2) = 0.005797 g/L

To calculate M1 we use the following equation.

M1V1 = M2V2

M1 = 0.005797 * 100 ml / 25 ml

M1 = 0.0232 g/L

mass of copper = Penny solution x Volume

mass of copper  = 0.0232 g/L x 0.1 L

mass of copper = 0.00232 g

% mass of copper = (total mass of copper ÷ mass of penny) x 100

% mass of copper = (0.00232/ 0.059 ) x 100

% mass of copper = 3.93 %

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I can form two compounds if I combine calcium, hydrogen and oxygen in five minutes.

A compound is formed by the combination of atoms. It is important to note that the same atoms can be combined in different ways to produce new compounds.

I can form two compounds if I combine calcium, hydrogen and oxygen in five minutes.

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