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Make a funny sentence for the beneficial or great uses of magnesium

Here is an example for Mercury, it HAS to for Magnesium

¨I have a long history of use in fluorescent lighting so I can light up any room ¨

To determine the time it takes to form 0.20 moles of O2, we need to first find the initial concentration of NO2 and the final concentration of NO2 after the reaction.
Initial concentration of NO2 = (0.50 moles) / (1.00 L) = 0.50 M

Reporting the answer to 2 significant figures, the time it takes to form 0.20 moles of O2 is 1.6 s.

To solve this problem, we need to use the rate law equation and the given values to calculate the time required to form 0.20 moles of O2. The rate law equation for this reaction is rate = k [NO2]^2.
First, we need to calculate the initial concentration of NO2 in the reaction vessel. Since the vessel contains 1.00 L of gas and 0.50 moles of NO2, the initial concentration of NO2 is 0.50 M.
Next, we can use the rate law equation to calculate the rate of the reaction at the initial concentration of NO2:
rate = k [NO2]^2
rate = 0.25 M-1 s-1 x (0.50 M)^2
rate = 0.0625 M/s
To form 0.20 moles of O2, we need to calculate the time required at this rate:
0.20 moles O2 / 2 moles NO2 = 0.10 moles NO2 used
0.10 moles NO2 / (0.0625 M/s) = 1.6 s
Therefore, it would take 1.6 seconds (reported to 2 significant figures) to form 0.20 moles of O2 in the reaction vessel.
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Answer:

A

Explanation:

APEX

The sulfur dichloride has bent shape.

i.e, option A is correct one.

The three dimension (3D) representation of molecule by excluding lone pair of electron is called shape of the molecule.

The geometry and shape of the molecule is determined by using some theories like valence bond theory, hybridization and VSPER theory.

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Time to decay : 2040 years

Further explanation  

The atomic nucleus can experience decay into 2 particles or more due to the instability of its atomic nucleus.  

Usually radioactive elements have an unstable atomic nucleus.  

The main particles are emitted by radioactive elements ,so that they generally decay, are alpha (α), beta (β) and gamma (γ) particles  

General formulas used in decay:  

\(\tt Nt=No.\dfrac{1}{2}^{\dfrac{T}{t\frac{1}{2} }\)  

T = duration of decay  

t 1/2 = half-life  

N₀ = the number of initial radioactive atoms  

Nt = the number of radioactive atoms left after decaying during T time  

moles zirconium :

\(\tt \dfrac{15.4}{91}=0.169\)

moles niobium :

\(\tt \dfrac{2.2}{91}=0.0242\)

the half-life of niobium-91 is 680 years

Reaction

⁹¹₄₁Nb ⇒⁹¹₄₀Zr + ₁⁰e

Amount of Nb from reaction : 0.169

Amount of initial Nb = 0.0242 + 0.169 = 0.1932

Time to decay (T) :

\(\tt 0.0242=0.1932.\dfrac{1}{2}^{\dfrac{T}{680}}\\\\0.1252=\dfrac{1}{2}^{\dfrac{T}{680}}\\\\\dfrac{1}{2}^{3}=\dfrac{1}{2}^{\dfrac{T}{680}}\\\\T=680\times 3=2040\)

Answer:

It’s CCCCCCCCCCCCCCC

Explanation:

I just took the instruction and yes its “C.”

Answer:

In Australia, it's warmer than most of the United States during winter.

Explanation:

Answer: Molarity when 25.0 g of the compound \(NaClO_{3}\)is placed in 85.0 mL of solution is 294.12 M.

Explanation:

Given: Mass = 25.0 g

Volume  = 85.0 mL (1 mL = 0.001 L) = 0.085 L

Molarity is the number of moles of a substance divided by volume in liter.

Hence, molarity of given solution is calculated as follows.

\(Molarity = \frac{mass}{Volume (in L)}\)

Substitute the values into above formula as follows.

\(Molarity = \frac{mass}{volume (in L)}\\= \frac{25.0 g}{0.085 L}\\= 294.12 M\)

Thus, we can conclude that molarity when 25.0 g of the compound \(NaClO_{3}\)is placed in 85.0 mL of solution is 294.12 M.

Answer:

C.the sum of the kinetic energy and the potential energy of an object

Explanation:

This question can be viewed from two angles.

Mechanical energy is defined as the energy of an object in motion or the energy that is stored in objects according to their position.

Mechanical energy can also be defined algebraically as:

\(Energy_{Mechanical} = U + K\)

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Answer:

A Biome is way bigger than a ecosystem

Explanation:

answer: biome

because many ecosystems can make up a single biome.

Both options have the same price per ounce. However, it is worth noting that the six-pack may be a better option for those who prefer the convenience of single-serving cans, while the 2-liter bottle may be a better option for larger groups or gatherings.

The six-pack contains 6 cans, each with a volume of 12 ounces, so the total volume of soda in the six-pack is:

6 cans x 12 ounces/can = 72 ounces

A 2-liter bottle contains:

2 liters x 33.8 fluid ounces/liter = 67.6 fluid ounces

Therefore, the six-pack has a greater volume of soda than the 2-liter bottle.

To determine which option is a better value based on price per ounce, we need to calculate the price per ounce for each option.

For the six-pack, the price is $1.37 per six-pack, or:

$1.37/6 cans = $0.23 per can

Since each can contains 12 ounces of soda, the price per ounce is:

$0.23/12 ounces = $0.019 per ounce

For the 2-liter bottle, the price is $1.31 per bottle, or:

$1.31/67.6 fluid ounces = $0.019 per fluid ounce

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Full Question:  drinks are often sold in six-packs of 12-ounce cans and in 2-liter bottles. A liter is about 33.8 fluid ounces. Which is the greater volume: a six-pack or 2 liters?

A store offers a 2-liter bottle of soft drink for $1.31 and a six-pack of 12-ounce cans for $1.37. Which is the better value (based on price per ounce)?

Answer:

The number of oxygen in 7.9  × 10⁻¹ moles of CO₂ is 9.5116 × 10²³ atoms of oxygen

Explanation:

The given parameters are;

The number of moles of CO₂ = 7.9 × 10⁻¹ moles

The number of molecules of CO₂ in one mole of CO₂ = 6.02 × 10²³

The number of molecules, \(N_{CO_2}\), of CO₂ in 7.9 × 10⁻¹ moles is given as follows;

\(N_{CO_2}\) = 7.9  × 10⁻¹ × 6.02 × 10²³ ≈ 4.76 × 10²³ molecules

The number of atoms of oxygen in one molecule of CO₂ = 2 oxygen atoms

Therefore;

The number of oxygen in 7.9  × 10⁻¹ moles of CO₂ = 2 × 4.76 × 10²³ ≈ 9.5116 × 10²³

The number of oxygen in 7.9  × 10⁻¹ moles of CO₂ ≈ 9.5116 × 10²³ atoms of oxygen.

Answer: P: 25.898% CI: 74.102 %

Explanation: Use the formula, Mass % = mass/total Mass x 100%, to solve.

A potter can use chemistry to better understand how a pottery wheel speed impacts the pot's height. OB. A potter's design can benefit from chemistry.

Several verbal and nounal senses of the word "design" exist. Design refers to the process of outlining a project's final form and functionality through the use of sketches. For instance, before building a new bridge, the government will hire a team to design it. Humans have been proven to develop an immediate thought within a few seconds, but once that impression has matured, it can take much longer to change that perception.

Chemistry is the area of science that focuses.

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The calculated molar ratio of iron to oxygen in BIFs is 1.452.

Comparing this ratio to the molar ratios of Hematite (1:0.75) and Magnetite (1:0.67), we can see that the calculated value of 1.452 is closest to the Hematite molar ratio of 1:0.75. Therefore, Hematite is the more dominant iron component in BIFs.

To calculate the mass of oxygen contained within BIFs, we'll use the given information:

Total mass of the modern atmosphere = 5.01×10¹⁸ kg

Percentage of oxygen in the modern atmosphere = 21%

Mass of oxygen contained within the modern atmosphere = (5.01×10¹⁸ kg) × (0.21) = 1.051×10¹⁸ kg

Percentage of oxygen contained in BIFs = 6.6% (given)

Mass of oxygen contained within BIFs = (6.6% of 1.051×10¹⁸ kg) = 6.6/100 × 1.051×10¹⁸ kg = 6.9166×10¹⁶ kg

Therefore, the mass of oxygen contained within BIFs is 6.9166 × 10¹⁶ kg.

To calculate the number of moles of oxygen contained within BIFs, we'll use the molecular mass of O₂:

Molecular mass of O₂ = 0.032 kg/mole

Number of moles of oxygen contained within BIFs = (Mass of oxygen in BIFs) / (Molecular mass of O₂)

= (6.9166×10¹⁶ kg) / (0.032 kg/mole) = 2.1614375 × 10¹⁸ moles

Therefore, the number of moles of oxygen contained within BIFs is 2.1614375 × 10¹⁸ moles.

Next, let's calculate the mass of iron in BIFs:

Total mass of BIFs = 5.0×10¹⁷ kg

Percentage of iron in BIFs = 35%

Mass of iron contained within BIFs = (35% of 5.0×10¹⁷ kg) = 35/100 × 5.0×10¹⁷ kg = 1.75×10¹⁷ kg

To calculate the number of moles of iron contained within BIFs, we'll use the atomic mass of iron:

Atomic mass of iron = 0.0558 kg/mole

Number of moles of iron contained within BIFs = (Mass of iron in BIFs) / (Atomic mass of iron)

= (1.75×10¹⁷ kg) / (0.0558 kg/mole) = 3.1367419 × 10¹⁸ moles

Therefore, the number of moles of iron contained within BIFs is 3.1367419 × 10¹⁸ moles.

Finally, let's calculate the molar ratio of iron to oxygen in BIFs:

Molar ratio of iron to oxygen = (Number of moles of iron) / (Number of moles of oxygen)

= (3.1367419 × 10¹⁸ moles) / (2.1614375 × 10¹⁸ moles)

≈ 1.452

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Answer:

4, 3, 1, 12

It balances now

molar mass of PF5 = 125.966 g/mol

125 g PF5 × (1 mol PF5/125.966 g PF5) = 0.992 mol PF5

0.992 mol PF5 × (6.022 × 10^23 molecules PF5);

= 5.97 × 10^23 molecules PF5

Since there 5 fluorine atoms per molecule of PF5,

(5.97.× 10^23 molecules PF5) × (5 atoms F/1 molecule PF5)

= 2.99 × 10^24 atoms F

The command that allows moving a file from one location to another is the "mv command".

The mv command renames or transfers files and folders from one directory to another. A file or directory keeps its base file name when moved to a new directory. All links to other files are preserved when you transfer a file, with the exception of when you move it to a different file system. A directory and its contents are added beneath the existing directory when you transfer a directory into it.

The TargetDirectory option of the mv command allows you to provide a new file name or a new directory path name when renaming a file or directory.

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According to law of conservation of mass, the carbon cycle supports the law of conservation of mass as the  total amount of carbon does not change as it moves through the carbon cycle.

According to law of conservation of mass, it is evident that mass is neither created nor destroyed rather it is restored at the end of a chemical reaction .

Law of conservation of mass and energy are related as mass and energy are directly proportional which is indicated by the equation E=mc².Concept of conservation of mass is widely used in field of chemistry, fluid dynamics.

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Answer:

B and C

Explanation:

The correct answer is Condensation and Deposition

Answer:

Explanation:

It is Deposition and Condensation

55.845 g/mol of the mass of cans in the box we brought had a mass of 23kg. 411.74 mol moles we have.

To determine the number of moles of tin cans you have, we need to know the molar mass of the metal that the cans are made of. Tin cans are usually made of steel, which is an alloy made primarily of iron and carbon, with small amounts of other elements.

To convert the mass of the cans (23 kg) to moles, we need to use the following formula:

moles = mass / molar mass

moles = 23,000 g / 55.845 g/mol = 411.74 mol

Therefore, the number of moles of iron in the 23 kg of tin cans is approximately 411.74 mol.

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Answer:

C

Explanation:

Answer:

3

Explanation:

Protons and electrons are always the same.

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Question:

How many moles of H2O are formed from the combustion of 5.0 mol CH4

Answer:

For any balanced chemical reaction, whole numbers (coefficients) are used to show the quantities (generally in moles ) of both the reactants and products. For example, when oxygen and hydrogen react to produce water, one mole of oxygen reacts with two moles of hydrogen to produce two moles of water.

Answer:

solvent

Explanation:

the solvent is usually a liquid substance

Allosteric site and active site are the two sites on an enzyme.

Allosteric enzymes are those that have two sites. They are the active site and the allosteric site. A unique effector or modulator can be linked to an allosteric site on an enzyme. This fastening can be reversed. Similar to how active sites relate to substrates, this site has a special connection with modulators. An enzyme's allosteric site is a location where activator or inhibitor molecules can attach to the enzyme to either activate or inhibit enzyme activity.

The areas on the surface of enzymes known as active sites are often designed by nature during the course of evolution to either catalyze a process or bind substrates. Consequently, the active site can be split into two components: the catalytic site and the substrate binding site.

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Answer:

because they possess the same number of electron at their outermost shell

Hg⁺ with I⁻ forms HgI

Hg⁺ with S²⁻ forms Hg₂S

Hg⁺ with CO₃²⁻ forms Hg₂CO₃

K⁺ with I⁻ forms KI

K⁺ with S²⁻ forms K₂S

K⁺ with CO₃²⁻ forms K₂CO₃

Answer:

Sand dunes are created when wind deposits sand on top of each other until a small mound starts to form. Once that first mound forms, sand piles up on the windward side more and more until the edge of the dune collapses under its own weight.

• Molar mass NH3 ,= Molmass of N + ( 3xmol.mass of H ) = ,17 g/mol

• Molar mass of O2, = 2 x Mol.mass of O = 2*16 = ,32 g/mol

• Mass of NH3 = 7.42 g

The balanced equation of the chemical reaction:

According to stoichemistry ,

• 4 moles of NH3 reacts with 5 moles of O2

• 4x17 g of NH3 reacts with 5x32 g of O2

• then , 7.42 g NH3 reacts with x mass of O2