What causes air masses to move?
A.) A difference in air pressure and temperature occurs.
B.) Weather conditions change rapidly to produce storms.
C.) A collision takes place between two natural wind patterns.
D.) Long, narrow bands of wind blow in the upper atmosphere.

Correct Answer is D.

Answer:

50 CM burette

Explanation:

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The metal would be the cathode and Zinc would be the anode. There must be an anode and a cathode in an electrochemical cell.

Steps to electroplate a metal with zinc:

Prepare the electrolyte solution: Dissolve zinc sulfate in water to make a solution. This will serve as the electrolyte solution.

Prepare the metal to be plated (cathode): Clean the metal to be plated thoroughly to remove any dirt, grease, or other contaminants. This is important to ensure good adhesion of the zinc plating.

Prepare the zinc anode: Clean the zinc anode thoroughly and suspend it in the electrolyte solution.

Set up the electroplating apparatus: Connect the positive terminal of the power supply to the zinc anode and the negative terminal to the metal to be plated (cathode). Place the metal to be plated (cathode) in the electrolyte solution.

Start the electroplating process: Apply a direct current (DC) voltage to the electrodes. This will cause the zinc ions in the electrolyte solution to be attracted to the metal to be plated (cathode) and deposit on its surface.

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The empirical formula of this compound is \(Fe_2O_3\)

To calculate the empirical formula of a compound, the value of moles of each element is needed.

As we have the information of the mass value, we will use the molar mass expression, which corresponds to:

\(MM_O = 16g/mol\\MM_Fe = 55.8g/mol\)

                                              \(MM = \frac{m}{mol}\)

                                                   \(16 = \frac{4.8}{x}\)

                                                   \(x = 0.3mol\)

                                                    \(55.8=\frac{11.2}{x}\\x = 0.2\)

As the value of the empirical formula must be an integer, simply multiply the two values ​​by a common factor:

                                                \(O = 0.3 \times 10 = 3\\Fe = 0.2 \times 10 = 2\)

                                                       \(Fe_2O_3\)

So, the empirical formula of this compound is \(Fe_2O_3\).

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Coal and Energy obtained from coal are formed as a result of decomposed life matter such as plants

A. Compressed ancient plants

It should be noted that coal is also a type of fossil fuel formed by prolong compaction of fossil material e.g dead plants over millions of years, forest lives etc. and as a result of high pressure and heat acting on these fossil matter they are transformed to fuel.

In summary, fossil fuels are formed as a result of age long compressed matter.

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The formula of the hydrate is NiCl2·4.27H2O. The name of the hydrate is nickel (II) chloride tetrahydrate.

To determine the formula and name of the hydrate, we need to first find the value of "x" in the formula NiCl2·xH2O using the given information.

Mass of water = Initial mass - Mass of anhydrous salt

Mass of water = 0.470 g - 0.256 g

Mass of water = 0.214 g

The molar mass of H2O is 18.015 g/mol, so the number of moles of water present in the hydrated salt can be calculated as:

Moles of water = Mass of water / Molar mass of water

Moles of water = 0.214 g / 18.015 g/mol

Moles of water = 0.0119 mol

The number of moles of anhydrous salt can be calculated by dividing its mass by its molar mass:

Moles of anhydrous salt = Mass of anhydrous salt / Molar mass of anhydrous salt

Moles of anhydrous salt = 0.256 g / (Ni: 58.69 g/mol + 2Cl: 2 x 35.45 g/mol)

Moles of anhydrous salt = 0.00279 mol

The ratio of moles of water to moles of anhydrous salt is equal to "x" in the formula NiCl2·xH2O:

Moles of water / Moles of anhydrous salt = x

0.0119 mol / 0.00279 mol = x

x ≈ 4.27

Therefore, the formula of the hydrate is NiCl2·4.27H2O. The name of the hydrate is nickel (II) chloride tetrahydrate.

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The value of the equilibrium constant Kc or Kp for ((ab)²)/((a₂)(b²))

The equilibrium constant expression for the given chemical reaction is:

Kc = [(ab)²] / [(a₂)(b²)]

where Kc is the equilibrium constant.

Let's assume that the gases have partial pressures of p(ab), p(a2), and p(b). Then, the equilibrium constant expression can be written as:

Kp = [(p(ab))²] / [(p(a₂))(p(b²))]

Now, we can use the ideal gas law to relate the partial pressures to the number of moles of each gas:

p(ab) = (n(ab) * RT) / V

p(a2) = (n(a2) * RT) / V

p(b) = (n(b) * RT) / V

where n is the number of moles, R is the gas constant, T is the temperature in Kelvin, and V is the volume.

Substituting these expressions into the equilibrium constant expression, we get:

Kp = [(n(ab) * RT / V)²] / [(n(a₂) * RT / V) * (n(b) * RT / V)²]

Simplifying, we get:

Kp = (n(ab)² / n(a₂) * n(b)²) * (RT / V)²

We can rewrite the expression in terms of the number of moles of the reactants and products, as:

Kp = ([ab]² / [a₂] * [b]²) * (RT / P)²

where [ab], [a₂], and [b] are the molar concentrations of the reactants and products, and P is the total pressure of the gases.

Therefore, the value of the equilibrium constant Kc or Kp for ((ab)²)/((a₂)(b²)) can be calculated using the above expression. However, the specific numerical value of Kc or Kp will depend on the temperature and pressure conditions of the reaction.

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Subaquatic soil can be classified as sediment or soil based on its geological properties and formation processes.

Sediment refers to any material that is transported and deposited by water, wind, ice, or gravity. Sediments can be composed of various materials, such as minerals, rocks, organic matter, and even human-made debris.

Sediments can accumulate in different environments, such as rivers, lakes, oceans, and deserts, and can be deposited in layers over time.

Subaquatic soil can be classified as sediment or soil based on its geological properties and formation processes. If it has primarily formed through sediment deposition, it is more appropriate to classify it as sediment.

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The minimum number of grams of I that must be present is ; 0.01836 * 10⁻³ mol

Given data :

Volume of solution to be tested for I-ion = 10 mL

Volume of  Pb(NO₃)₂ = 0.2 mL

molarity of Pb(NO₃)₂ = 0.13 M

First step : calculate conc of PB²⁺ ions in the solution

conc of PB²⁺ ions =  ( molarity of Pb(NO₃)₂ * volume of  Pb(NO₃)₂ ) / ( total volume )

                              = ( 0.13 * 0.2 ) / ( 10 + 0.2 )

                              = ( 0.026 ) / ( 10.2 )  = 0.002549 M

Next step : determine the molarity of  I

using the dissociation reaction of PbI₂

PbI₂(s) ---> Pb²⁺ (aq)  + 2I (aq)

also;  Ksp = [ Pb²⁺ ] [ I ]²  ---- ( 1 )

From the question the given value of Ksp = 8.49 * 10⁻⁹

Therefore equation ( 1 ) becomes

8.49 * 10⁻⁹ = ( 0.002549 ) * [ I ]²

[ I ] = √ ( 8.49 * 10⁻⁹ ) / ( 0.002549 )

      = 0.0018 M

Final step : Determine the minimum number of grams of I

moles of I = molarity of I * total volume

                 = 0.0018 M * 10.2 mL

                 = 0.01836 * 10⁻³ mol

Hence we can conclude that The minimum number of grams of I that must be present is ; 0.01836 * 10⁻³ mol

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You can see that in the chemical equation, 1 mole of Cu(NO3)2 is produced by 1 mole of AgNO3. The ratio between them is 1 : 1, so 1.50 moles of AgNO3 produce 1.50 moles of Cu(NO3)2. The only thing we need to do is the conversion from moles to grams using the molar mass of Cu(NO3)2.

You can see the molar mass of each element of Cu(NO3)2 in the periodic table. For Cu its molar mass is 63.5 g/mol, for N would be 14 g/mol and for oxygen, we have 16 g/mol. We have to do the algebraic sum to obtain the entire molar mass using the number of atoms.

We have 1 atom of Cu, 2 atoms of N, and 6 moles of oxygen (2 x 3 = 6):

Using this molar mass and the number of moles, we can find the number of grams of Cu(NO3)2, like this:

So, the answer is that 281.25 grams of Cu(NO3)2 are produced by 1.50 moles of AgNO3.

Energy is released during nuclear reactions. To calculate energy changes, use the attached image below. Nuclear reactions produce far more energy than other types of reactions, such as chemical reactions.

The term nuclear reaction is defined as a process in which two nuclei, or a nucleus and an external subatomic particle, collide to produce one or more new nuclides.

Normally, chemical reactions take place outside the nucleus. Nuclear reactions occur only within the nucleus. When chemical reactions occur, elements retain their identity, as do the nuclei of atoms.

Thus, in nuclear reactions, the nuclei of atoms undergo complete transformations, resulting in the formation of new elements.

The nuclear reactions are as follows:

Alpha decay - PO₈₄²°⁶⇒ ₈₂Pb²°⁶ + He⁴₂

Beta⁻ decay - Na²²₁₁ ⇒ Na ²²₁₀ + e°₋₁

Beta⁺ decay - Na²⁴₁₁ ⇒ Na₁₀²⁴ + e°₋₁+β

Gamma - CO⁶°₂₇ ⇒ Ni⁶⁰₂₆ + e°₋₁ +γ

Fission - U²³⁵₉₂ + n₀¹ ⇒ Ba¹⁴⁴₅₆ + Kr⁸⁹₃₆ +3n₀¹

Fusion- H₁² +H³₁ ⇒ He⁴₂ + n¹₀ +17.59MeV

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The electrons move from left to right through the circle labeled "M" to reach the cathode, where reduction takes place.

If oxidation occurs on the left side of the fuel cell and reduction occurs on the right side, the movement of electrons can be described as follows: Electrons move from left to right through the circle labeled "M."

In a fuel cell, the process of oxidation takes place at the anode (labeled A) where the fuel is oxidized, releasing electrons. These electrons then flow through the external electrical circuit, represented by the wire connecting objects A and B. The electrons reach the cathode (also labeled A) on the right side of the cell, where reduction occurs.The circle labeled "M" represents the membrane or electrolyte in the fuel cell. This membrane allows the transport of ions but blocks the movement of electrons. As a result, electrons cannot flow directly through the electrolyte but must travel through the external circuit.

This movement of electrons through the external circuit is what generates an electric current that can be used to power electrical devices or systems.

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Order of miscibility is

HF > CH3F > CH2NH > C3H4

The most miscible compound in ammonia is HF, which is then followed by CH3F, CH2NH, and C3H4.

This is due to the fact that ammonia's polar nature enables it to establish hydrogen bonds with extremely electronegative elements like fluorine, electronegative atoms like carbon and nitrogen, and finally non-polar compounds like C3H4.

So, order of miscibility HF > CH3F > CH2NH > C3H4

Ammonia is a highly reactive substance that can combine with other elements to generate a wide range of compounds. Ammonium chloride is the product of its most frequent interaction with acids, such as hydrochloric acid. Amines are created when bases and ammonia react. Ammonia can be used to neutralise acids because it is a weak base. Additionally, it is employed in the production of compounds like as fertilisers and explosives.

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The number of moles of gas in the sample is 0.72 mol.

To determine the number of moles in the gas, we use the ideal gas law:

PV = nRT

Where P is the pressure, V is the volume, n is the number of moles, R is the gas constant ( 0.08206 Latm/molK ), and T is the temperature in Kelvin.

First, convert the temperature from Celsius to Kelvin:

T (K) = T (°C) + 273.15

T (K) = 35.2 + 273.15

T (K) = 308.35 K

Next, we need to convert the pressure from torr to atm:

1 atm = 760 torr

P (atm) = 735.5 torr / 760 torr/atm

P (atm) = 0.96776 atm

Plug in the values we have and solve for n:

PV = nRT

n = PV / RT

n = (0.96776 atm)(18.86 L) / (0.08206L·atm/mol·K)(308.35 K)

n = 18.25 / 25.303

n = 0.72 mol

Therefore, there are 0.72 moles of gas in the sample.

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The properties of a natural resource that make it useful for humans as a material or energy source is the ability to convert mass into energy and vice versa.

The expression natural resources make reference to all types of matter and energy extracted from nature that can be used to produce goods and services.

Some examples of natural resources include for example irreversible resources such as fossil fuels (i.e., oil, or coal, gas, minerals such as metals, rocks, etc) as well as those based on the use of reversible energy such as eolic air energy, solar radiation or sunlight, soil and hydric resources or water.

Therefore, with this data, we can see that natural resources can be defined as any material and or energy obtained from nature that may be irreversible or reversibly used to produce goods and services.

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Answer:

[He]2\(s^{2}\)3\(p^{1}\)

Explanation:

The electron configuration for Boron is 1\(s^{2}\)2\(s^{2}\)3\(p^{1}\), but you can also write it as the noble gas configuration, which is [He]2\(s^{2}\)3\(p^{1}\)

Note that helium has the configuration of 1\(s^{2}\), so we instead of writing it, we write [He]. This can be useful when writing the configurations of elements from the later periods as it saves space.

The balanced equation of the redox reaction is given as follows:

The balanced equation of the reaction is determined using the half-reaction method.

The given equation of the redox reaction is:

H₆TeO₆ + Br₂ ----> TeO₂ + BrO₃⁻

Reduction half-reaction:

H₆TeO₆ → TeO₂

The oxidation state of Te changes from +6 to +4, showing that it has lost gained electrons.

H₆TeO₆ → TeO₂ + 2e⁻

Oxidation half-reaction:

Br₂ → BrO₃⁻

The oxidation state of Br changes from 0 to +5, showing that it has lost five electrons.

Balancing the electrons transferred and the atoms by adding electrons, H₂O, and H⁺ to the appropriate sides:

Br₂ + 6 H₂O → 2 BrO₃⁻ + 12 H⁺ + 10 e⁻

The number of electrons transferred in both half-reactions balanced is  by multiplying the oxidation half-reaction by 5 and the reduction half-reaction by 2:

5 (H₆TeO₆ → TeO₂ + 2 e⁻) → 5 H₆TeO₆ → 5 TeO₂ + 10 e⁻

2 * (Br₂ + 6H₂O → 2 BrO₃⁻ + 12 H⁺ + 10e⁻) → 2 Br₂ + 12 H₂O → 4 BrO₃⁻ + 24 H⁺ + 20 e⁻

The two half-reactions are added together and the electrons are canceled out to obtain the balanced redox reaction:

5 H₆TeO₆ + 2 Br₂ + 12 H₂O → 5 TeO₂ + 4 BrO₃⁻ + 24 H⁺

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The balanced chemical reaction between H₂(g) and O₂(g) molecules is given by 4 H₂(g) + 2O₂(g) → 4 H2₂O(g).

A chemical equation is said to be balanced if the quantity of each kind of atom in the reaction is the same on both the reactant and product sides. In a balanced chemical equation, the mass and the change are both equal.

The reactant box contains 4 molecules of H₂ and two molecules of O₂ and the product box contains 4 molecules of water.

The reduced balanced equation is as follows:

2H₂(g) + O₂(g) ⇒ 2H₂O(g).

Thus,the balanced equation that is represented in the drawings is 4 H₂(g) + 2O₂(g) → 4 H2₂O(g).

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Your question is incomplete, incomplete part of question attach in image below.

Answer:

A, F, H

Explanation:

Hydrogen bonding occurs between compounds that make N-H, O-H, and F-H bonds.  Just because a compound has a N, O, and F atom in the molecule doesn't mean that the compound will exhibit hydrogen bonding.  The N, O, or F must be bonded to a hydrogen.  Carbon-hydrogen bonds do not cause hydrogen bonding.

This means that A, F, and H will have hydrogen bonding.

Answer:

CH3CH2OH

CH3NH2

NH3

Explanation:

Hydrogen bonds are formed when hydrogen is bonded to an electronegative atom such as oxygen or nitrogen.

Hydrogen bonds accounts for the solubility of alcohols and amines in water. Similarly, it accounts for the high boiling point of ammonia. All the compounds chosen above exhibit a significant degree of hydrogen bonding.

Answer:

polar bonds are caused by different kind of atoms, because almost every atoms have different powers to attract electrons.

the answer will be the two same atoms, F2

The United States experienced a decrease in the real GDP, high inflation, and arising unemployment rate.

The United States appeared to be entering a recession.A recession is a decline in economic activity, characterized by declining GDP, high unemployment rates, and increased unemployment benefits. Economic analysts and the media commonly use a two-quarter consecutive decline in real GDP as a definition of a recession.

The United States is considered to have entered a recession in the 1970s, which was characterized by an energy crisis, inflation, and recession. However, by the end of the decade, the economy had improved, and it entered into the 1980s with a strong economic performance.

The 1970s were a period of high inflation, low growth, and an oil crisis, which had a significant impact on the United States economy. Therefore, it can be concluded that The United States was in the middle of an economic boom before the 1970s recession and entered a recession in the 1970s due to a decrease in the real GDP, high inflation, and arising unemployment rate.

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Answer:0.230g

Explanation:

Answer:

1

Explanation:

Eventually the survivors will become resistant to insecticide

Answer:

285 kJ

Explanation:

potential energy

= m g h

= 95,000 g × 10 m/s² × 300 meters

= 95 kg × 10 m/s² × 300 meters

= 950 kgm/s² × 300 meters

= 285,000 J

= 285 kJ

Answer:

Explanation:

1 mole of nickel contains 6.02 * 10^23 atoms

3.63 mols of nickel contain x atoms.

What you have is a proportion. A proportion consists of 2 ratios or 4 parts.

Of the 4 parts, you know three of them. The problem is to solve for the 4th.

1/3.63 = 6.02*10^23 / x               Cross multiply

x = 3.63 * 6.02* 10^23                Combine the right.

Answer: x = 2.19*10^24 atoms

The mass of the solid aluminum that forms are 192.73 grams

To determine the mass of solid aluminum that forms, we need to use stoichiometry and the balanced chemical equation for the reaction between magnesium and aluminum nitrate.

The balanced chemical equation is:

3 Mg + 2 Al(\(NO_{3}\))3 → 3 Mg(\(NO_{3}\))2 + 2 Al

The equation shows that 3 moles of magnesium react with 2 moles of aluminum to produce 2 moles of aluminum nitrate.

To calculate the mass of solid aluminum, we need to know the amount of magnesium used. Given that the volume of the magnesium is 150.0 mL and its density is 1.738 g/cm³, we can calculate the mass of magnesium using the formula:

Mass = Volume × Density

Mass of magnesium = 150.0 mL × 1.738 g/cm³ = 260.7 g

Now, using the molar mass of magnesium (24.31 g/mol) and the molar ratio from the balanced equation, we can determine the moles of magnesium used:

Moles of magnesium = Mass of magnesium / Molar mass of magnesium

= 260.7 g / 24.31 g/mol

= 10.72 mol

According to the stoichiometry of the balanced equation, the ratio of moles of magnesium to moles of aluminum is 3:2. Therefore, the moles of aluminum formed will be:

Moles of aluminum = (2/3) × Moles of magnesium

= (2/3) × 10.72 mol

= 7.15 mol

Finally, we can calculate the mass of solid aluminum using its molar mass (26.98 g/mol):

Mass of aluminum = Moles of aluminum × Molar mass of aluminum

= 7.15 mol × 26.98 g/mol

= 192.73 g

Therefore, the mass of the solid aluminum that forms is approximately 192.73 grams.

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The correct option s D.

Because from the reaction of hydrogen and nitrogen to form ammonia, Hydrogen is oxidized, nitrogen is reduced.

Therefore, Nitrogen gas is the oxidizing agent and hydrogen gas is the reducing agent.

This is called a redox reaction

Redox reaction is a chemical reaction in which electrons can move from one atom to another leading to change of oxidation states.

In this reaction nitrogen gas act as an oxidizing agent and hydrogen gas actsas a reducing agent.

N2+3H2 = 2NH3

(g). (g)

From the reaction, oxidation number of nitrogen is 0 on the reactants' side to

3.

The decrease in the oxidation number of nitrogen indicate that it is being reduced.

On the other hand, the oxidation number of hydrogen move from on the reactants' side to +1 on the products' side. This increase in the oxidation number of hydrogen indicate that hydrogen is oxidized.

Therefore, nitrogen gas is reduced to ammonia and hydrogen gas is oxidized to ammonia

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