The 21 centimeter wavelength photon of cold Hydrogen gas is emitted when...

Answer:

oxygen<carbon<aluminium<potassium

Explanation:

atomic radius increases down the group but decreases across the period

Answer:

Nomenclature is the process of naming chemical compounds with different names so that they can be easily identified as separate chemicals. ... For example, organic compounds include molecules with carbon rings and/or chains with hydrogen atoms (see picture below).01-Jul-2014

Nomenclature: Iron (II) Chloride

Compound: FeCl2

1,4-di-t-butyl-2,5-dimethoxybenzene is a solid substance. The melting point of 1,4-di-t-butyl-2,5-dimethoxybenzene is around 110-112 °C. 1,4-Di-t-butyl-2,5-dimethoxybenzene is also known as Bis(2,6-dimethoxy-4-tert-butylphenyl)methane.

This compound is used in a wide range of fields such as the pharmaceutical industry, material science and organic chemistry. 1,4-di-t-butyl-2,5-dimethoxybenzene is a solid substance. The melting point of 1,4-di-t-butyl-2,5-dimethoxybenzene is around 110-112 °C. 1,4-Di-t-butyl-2,5-dimethoxybenzene is also known as Bis(2,6-dimethoxy-4-tert-butylphenyl)methane

The formula of the 1,4-di-t-butyl-2,5-dimethoxybenzene is as shown below:Figure: The structural formula of 1,4-di-t-butyl-2,5-dimethoxybenzene. This compound is used in a wide range of fields such as the pharmaceutical industry, material science and organic chemistry.

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Answer:

Hey mate...

Explanation:

This is ur answer.....

This is because fluorine atoms are the smallest of the halogens—the atoms are bonded close together, which leads to repulsion between free electrons in the two fluorine atoms.

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Radiation from alpha decay has the least energy.

Alpha decay is the name for the nuclear process that releases alpha particles. Two protons that were lost by the uranium atom are present in the alpha particle. Additionally, the two protons have a +2 charge. The particle's mass, or the sum of its protons and neutrons, is represented by the top number, 4, in this case. Alpha particles must also have two neutrons because they have two protons, making a total of four protons and neutrons. Two protons and two neutrons are the constant components of alpha particles.

A nuclear process known as "alpha decay" releases a particle made up of two protons and two neutrons when an unstable nucleus transforms to another element. The helium nucleus that is being ejected is known as an alpha particle.

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Answer:

C) Alpha decay

Explanation:

Alpha decay, beta decay, electromagnetic decay, Gamma decay

its least to greatest

If 3.7 grams of cl2 are used, HCl produced from the reaction is 7.4 grams.

A balanced chemical reaction formed when the number of the atoms involved in the reactants side is same to the number of atoms in the products side.

The balanced chemical equation is

H₂ + Cl₂ ⇒ 2HCl

From the balanced equation above,

1 gram of Cl₂ reacted to produce 2 gram of HCl

To determine the grams of HCl produced

From the balanced equation above,

1 gram of Cl₂ reacted to produce 2 gram of HCl

Therefore,

3.7 gram of Cl₂ will react to produce

= 3.7 × 2

= 7.4 grams of HCl

Thus, if 3.7 grams of cl2 are used, HCl produced from the reaction is 7.4 grams.

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To two decimal places, the imaginary element's approximate atomic mass is 212.47 g/mol.

The identical unit cells are defined in such a way that they fill space without overlapping. A crystal lattice is the three-dimensional arrangement of atoms, molecules, or ions within a crystal.It is composed of multiple unit cells. Every lattice point is occupied by one of the three component particles.

For a face-centered cubic (FCC) lattice, the number of atoms per unit cell (Z) is 4. The density of the element can be related to its atomic mass (M) using the equation:

density = Z × M / (Na × a³)

where Na is Avogadro's constant and a is the edge length of the unit cell.

Rearranging this equation to solve for the atomic mass, we get:

M = density × Na × a³ / (Z)

Substituting the given values, we get:

M = (2.47 g/cm³) × (6.022 × 10²³ mol⁻¹) × (7.17 × 10⁻⁸ cm)³ / 4 = 212.47 g/mol

Therefore, the approximate atomic mass of the imaginary element is 212.47 g/mol, to 2 decimal places.

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Wascana Chemicals should use emissions reduction technologies to reduce the amount of sulphur dioxide emitted during paint production.

To comply with the Ministry of Environment's directive, Wascana Chemicals, a paint manufacturer, needs to reduce the amount of sulphur dioxide released during paint production. This can be accomplished through the use of emissions reduction technology, such as scrubbers, catalytic converters, or gasification systems.Scrubbers are devices that use a wet process to remove pollutants from gas streams. The gas stream is forced through a scrubbing solution that traps pollutants, including sulphur dioxide.Catalytic converters, on the other hand, use a chemical process to transform pollutants into less harmful substances. Gasification systems convert solid or liquid materials into a gas, which can be combusted to generate energy.

In conclusion, to comply with the Ministry of Environment's emissions reduction regulations, Wascana Chemicals should consider implementing one or more emissions reduction technologies such as scrubbers, catalytic converters, or gasification systems to reduce the amount of sulphur dioxide emitted during paint production.

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The gas sample is having molar mass of 64 g/mol

The question is incomplete, here is the complete question:

A sample of gas weighs 10.1 g and occupies a volume of 5.65 L at 60 °C and 580 torr. Identify the gas sample.

(a) (molar mass = 119.4 g/mol)  

(b) (molar mass = 44.02 g/mol)

(c) (molar mass = 64.07 g/mol)

(d) (molar mass = 17.03 g/mol)

(e) (molar mass = 70.90 g/mol)

To calculate the molar mass of the gas, we use the equation given by ideal gas equation:

PV = nRT

P = Pressure of the gas = 580 torr

V = Volume of the gas = 5.65 L

w = Weight of the gas = 10.1 g

M = Molar mass of gas = ?

R = Gas constant =62.36 L

T = Temperature of the gas = 60 degree C = ( 60+ 273) K  = 333K

Putting values in above equation, we get:

580 torr * 5.65 l = 10.1/ M* 62.364 L

M = 64g /mol

Hence, the gas sample is having molar mass of 64 g/mol

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The amount of the mass in grams that was lost from the fusion reaction is 5.56×10¯⁷ Kg

Energy is defined as the ability to work.

The mass can be obtained as follow

E = mc²

Divide both side by c²

m = E / c²

m = 5×10¹⁰ / 3×10⁸

m = 5.56×10¯⁷ Kg

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The name of the element is Arsenic (As). Atomic number of arsenic is 33 and its mass number is 77.

Atomic number is defined as the number of a chemical element located in the periodic system, where the elements are arranged in order of increasing number of protons in the nucleus. Accordingly, the number of protons, which is always equal to the total number of electrons in the neutral atom, is also known as the atomic number.

Mass number is defined as the the total number of protons and neutrons present in an atom. Mass number can be calculated by adding the number of neutrons and the number of protons (atomic number) together.

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Rutherford said that the atom is mostly empty space, with a small, dense positively charged nucleus located at the center.

Ernest Rutherford conducted the famous gold foil experiment, which involved bombarding a thin sheet of gold with alpha particles. He observed that most of the alpha particles passed straight through the gold foil, but some were deflected at angles, and a few bounced back in the direction they came from.

This led him to conclude that the atom was mostly empty space, with a small, dense nucleus at the center that was positively charged and contained most of the atom's mass. The negatively charged electrons were located in the space surrounding the nucleus, but they were much smaller and lighter than the nucleus itself.

In conclusion, Rutherford's discovery of the atomic nucleus revolutionized our understanding of the structure of the atom. It provided a more accurate picture of the atom than the previous plum pudding model, which suggested that the atom was a uniform blob of positive charge with electrons embedded throughout. Rutherford's model showed that the atom was a complex structure with a small, but incredibly dense nucleus at its center, surrounded by electrons in a cloud-like arrangement.

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Answer:

Forensic drug chemists analyze samples of unknown materials including powders, liquids and stains to determine the chemical identity or characteristics of the compounds that make up the sample. samples submitted as evidence in a drug-related case can contain one compound or a mixture of many compounds.

0.54g is the mass of carbon in  0.045 moles of carbon. Elementary particles shared the same quantity of matter.

A body's mass is an inherent attribute. Until the discoveries of the atom as well as particle physics, it was thought to be tied to the amount of matter inside a physical body. It was discovered that various atoms and elementary particles shared the same quantity of matter.

mole = given mass/ molar mass

substituting all the given values in the above equation, we get

0.045 moles = mass/ 12

mass =0.045×12= 0.54g

Therefore, 0.54g is the mass of carbon in  0.045 moles of carbon.

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The volume at 100 mmHg : 0.656 L

Boyle's Law  

At a constant temperature, the gas volume is inversely proportional to the pressure applied  

\(\rm p_1V_1=p_2.V_2\\\\\dfrac{p_1}{p_2}=\dfrac{V_2}{V_1}\)

V₁=3.5 L

P₁=2.5 kPa=18,7515 mmHg

P₂=100 mmHg

\(\tt \dfrac{18.7515}{100}=\dfrac{V_2}{3.5}\\\\V_2=\dfrac{18.7515\times 3.5}{100}=0.656~L\)

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An electric potential field that grows in the positive x-direction will cause an at-rest negatively charged particle to accelerate in that direction.

Around a charged item, the electric field acts as a "force field" to show in which direction an imaginary positively charged particle would be pushed by the electric force. It also demonstrates how powerful of a shove the electric force would provide.

The difference between two points in an electric field in terms of potential energy per unit charge is known as the electric potential, also known as voltage. 

We are aware that, if we move the particle to a specific location, the electrical potential energy will change depending on the amount of charge we are pushing or pulling, as well as whether it is positive or negative. To measure the electrical potential at any given site, physicists utilise a single positive charge as our model charge.

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Answer:

The volume of a sample of gas (2.49 g) was 752 mL at 1.98 atm and 62∘C 62 ∘ C .

%C = 40

%H = 6.67

%O = 53.33

Given

Glucose  C₆H₁₂O₆

Required

The percent composition

Solution

MW Gulucose = 180 g/mol

Ar C = 12 g/mol

Ar H = 1 g/mol

Ar O = 16 g/mol

%C = 6.12/180 x 100% = 40%

%H = 12.1/180 x 100% = 6.67%

%O = 6.16/180 x 100% = 53.33%

Answer: So to figure out your energy balance you need to gather some important information.  That is, you eat more calories than your body uses. A kilojoule is a calorie) is a measure of energy in food. On average, people eat and drink around 8700 kilojoules a day.

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The federal government was unable to intervene in elixir sulfanilamide containing diethylene glycol that causes kidney poisoning as there was no legal requirement that medicine be safe.

In 1937, a sulfonamide antibiotic called elixir sulfanilamide, which was incorrectly made, poisoned large numbers of people in the United States. Over a hundred individuals are said to have died as a result. The 1938 Federal Food, Drug, and Cosmetic Act was passed in response to the uproar produced by this episode and subsequent tragedies of a similar nature, greatly expanding the authority of the Food and Drug Administration to regulate pharmaceuticals.

A warning that Elixir Sulfanilamide was poisonous and lethal was promptly published in newspapers and broadcast on radio once the AMA laboratory identified diethylene glycol as the dangerous component. On the 14th, a doctor in New York was informed of the fatalities and immediately contacted Food and Drug Administration headquarters.

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Answer:

The new volume of the air inside when the cabin is pressurized to 75 kPa is 37818.\(\overline 6\) m³

Explanation:

The given 747 airplane parameters are;

The volume of air in the airplane, V₁ = 28,000 m³

The pressure of the air on the ground, P₁ = 101.3 kPa

The pressure of the air once it is in flight, P₂ = 75 kPa

Let V₂ represent the new volume of the air inside when the cabin is pressurized to 75 kPa

Boyle's Law states that the pressure of a given mass of air is inversely proportional to its volume at constant temperature

Therefore, by Boyle's law, we have;

P ∝ 1/V and P₁·V₁ = P₂·V₂

Which gives;

V₂ = P₁·V₁/P₂

Substituting the known values, we get;

V₂ = 101.3 kPa × 28,000 m³/(75 kPa) = 37818.\(\overline 6\) m³

The new volume of the air inside when the cabin is pressurized to 75 kPa = V₂ = 37818.\(\overline 6\) m³.

The equilibrium of this reaction shifts towards the reactants due to warming.

This is because the reaction is exothermic, meaning that it releases heat. When the temperature is increased, the reaction will shift in the direction that absorbs heat, which is towards the reactants. This is in accordance with Le Chatelier's principle, which states that a system at equilibrium will shift in a direction that counteracts any changes imposed on it.
In this case, the change imposed on the system is an increase in temperature, and the system counteracts this change by shifting towards the reactants, which absorb heat. This shift in equilibrium will result in a decrease in the concentration of the products and an increase in the concentration of the reactants.
Therefore, the correct answer is:
O towards the reactants

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By using the ideal gas law to get volume we have"

Where v is volume, T is temperatute, n is number of moles, R is the molar gas constant and P is pressure. At STP P= 101,325 Pa, T= 273.15 K and R= 8.314 J/mol K

We must first convert mass to moles:

By substituting this value into the ideal gas law we have:

1.9502e-6L of H2 gas reacted at STP

Answer:

1 NaCl

Explanation:

Explanation:

helium

Helium gas is not found in earth crust