Which element has the shortest ionization energy​

Answer:

option B is correct

Explanation:

momentum(p)=mv

mass= m=4 kg

velocity=v=1.5 m/s

P=4kg*1.5 m/s=6.0 kg.m/s

so option B is correct

The amount of heat energy produced when 1 g of hydrogen and 2 g of nitrogen are reacted, is -6.61 KJ

First, we shall obtain the limiting reactant. Details below:

3H₂ + N₂ -> 2NH₃

From the balanced equation above,

28 g of N₂ reacted with 6 g of H₂

Therefore,

2 g of N₂ will react with = (2 × 6) / 28 = 0.43 g of H₂

We can see that only 0.43 g of H₂ is needed in the reaction.

Thus, the limiting reactant is N₂

Finally, we the amount of heat energy produced. Details below:

3H₂ + N₂ -> 2NH₃ ΔH = -92.6 KJ

From the balanced equation above,

When 28 grams of N₂ reacted, -92.6 KJ of heat energy were produced.

Therefore,

When 2 grams of N₂ will react to produce = (2 × -92.6) / 28 = -6.61 KJ

Thus the heat energy produced from the reaction is -6.61 KJ

Learn more about heat energy:

https://brainly.com/question/31429264

#SPJ1

Answer:

5 moles of  Fe₂(SO₄)₃  will be produced

Explanation:

Given data:

Number of moles of Fe₂(SO₄)₃ = ?

Number of moles of Fe react = 10 mol

Solution:

Chemical equation:

3H₂SO₄   +   2Fe    →        Fe₂(SO₄)₃ + 3H₂

Now we will compare the moles of iron and  Fe₂(SO₄)₃ .

                 Fe        :           Fe₂(SO₄)₃

                  2          :             1

                  10         :           1/2×10 = 5 mol

5 moles of  Fe₂(SO₄)₃  will be produced.

Answer:

No we can’t cover the earth with one mole of pennies

Explanation:

We can’t cover the earth with one mole of pennies due to the fact that making this possible will require the flattening and extra expansion before it covers the whole surface.

The extra expansion and flattening with result in the loss of intermolecular forces and won’t remain as a solid and form other states of matter which won’t be able to cover the surface.

Answer:

Esto se debe a la rotación de la tierra

Explanation:

Surface ocean currents curve to the right in the Northern Hemisphere because the Earth rotates on its axis, circulating air is deflected toward the right in the Northern Hemisphere and toward the left in the Southern Hemisphere. This deflection is called the Coriolis effect.

Answer:

The molar density of any ideal gas at STP is:

1 mol / 22.4 L = 0.04464 mol / L

The molar mass of F2 is: 2(19) = 38 g/mol

0.04464 mol / L * (38 g / mol) = 1.70 g/L

Explanation:

There are 5.78 × 10^20 sulfide ions in sodium sulfide

The formula of the compound is Na2S. The molar mass of the compound is calculated as follows; 2(23) +32 = 46 + 32 = 78 g/mol

Number of moles of Na2S = 0.15 g/ 78 g/mol = 0.0019 moles

Since there is 1 mole of Na^+ and 2 moles of S^2- in Na2S, the number of S^2- ions in  0.19 moles of Na2S is 0.00096 moles of S^2-.

If 1 mole of S^2- contains 6.02  × 10^23

0.095 moles of S^2- contains 0.00096 moles × 6.02  × 10^23/ 1 mole

= 5.78 × 10^20 sulfide ions

Learn more: https://brainly.com/question/1309057

Answer: 11.1 L.

Explanation: A balloon filled with helium gas at 1.00 atm occupies 11.1 L.

Consider the gas is taken at STP. Thus at standard temperature and pressure of 1 atm where one mole of any gas contains 22.41 L. Thus helium gas at 1 atm pressure contains 22.414 L/mol

Helium is 2nd element in periodic table. It is a noble gas ncluded in the 18th group. Helium is the second most abundant element in the universe. Stars including sun is made of helium gas and hydrogen gas.

The condition at which the temperature is 298 K and pressure of 1 atm is called standard temperature and pressure or STP condition. At STP one mole pf every substance contains 22.414 liter of the gas.This is called molar volume.

Therefore, the volume of helium gas at 1 atm pressure by considering the condition of STP and the gas if taken is one moles will be 22.414 liter. This is the volume of one mole of all gas at stp.

To find more on helium, refer here:

https://brainly.com/question/1780577

#SPJ2

The number of moles of NaCl dissolved in the water to make the given solution is 1 mole.

A mole can be described as a unit that is employed to calculate the count of particles. The particles which are counted are usually identical entities, individually distinct.

The amount of chemical substance can be measured in the terms of the mole and the number of entities in one mole is approximately equal to 6.023 × 10 ²³.

Given, the one liter of a 1 M solution of NaCl.

The concentration of the NaCl solution = 1 M

The molarity of the given solution, \(M = n/V\)

The number of moles of NaCl, n = M ×V = \(\displaystyle {1 mol L^{-1}}\times{1L}\) = 1 mol

Learn more about the mole, here:

brainly.com/question/26416088

#SPJ1

The mass of lithium metal that is used in lithium batteries is 6.17 grams,  this can be calculated by using number of moles formula.

It is defined as the ratio between mass and molar mass.

It is given by:

Number of moles = mass / Molar mass

What information do we have?

Number of moles= 0.89 moles

Molar mass of Lithium metal= 6.941 g/mol

To find:

Mass of Lithium metal=?

On substituting the values

n= m/M

0.89 = m/ 6.941

m= 0.89*6.941

m= 6.177 grams

Thus, the mass of lithium metal is 6.177 grams.

Find more information about Number of moles here:

brainly.com/question/13314627

Answer:

Nitrogen group element, any of the chemical elements that constitute Group 15 (Va) of the periodic table. The group consists of nitrogen (N), phosphorus (P), arsenic (As), antimony (Sb), bismuth (Bi), and moscovium (Mc)

Explanation: Hope i helped! :D

Answer:

True

Explanation:

A hypothesis is an educated guess about the outcome of an experiment or thought

Answer:

C. Benzoic acid

-TheUnknownScientist

Answer:         ☆           ★                          ☆      ★           ☆    ★            ☆       ★  

Benzoic Acid          ☆              ★

Explanation:

There's a benzene ring(:

When copper is placed in water, it reacts with the water molecules to form copper(II) ions and hydrogen gas. The reaction is exothermic, which means it releases heat energy into the surroundings. By measuring the temperature changes that occur, we can determine the amount of heat that is released by the reaction.

The temperature changes can be measured using a thermometer. We can place the copper metal in a container of water and take the initial temperature reading. Then, we can add the copper to the water and record the temperature change over time. By monitoring the temperature changes, we can observe the exothermic reaction taking place.

The heat released by the reaction between copper and water has many practical applications, including in the design of power plants and in the production of steam for heating and electricity generation. Therefore, understanding the heat released during this reaction is important for a variety of scientific and engineering fields.

In conclusion, step 7 of putting copper metal in water and measuring the temperature changes allows us to observe and measure the heat released by the exothermic reaction between copper and water, which has important applications in various scientific and engineering fields.

Know more about exothermic here:

https://brainly.com/question/2924714

#SPJ11

Answer:

Aluminum

copper

Iron

Lead

The Final Slide:

Aluminum- 0.90

Copper- 0.35

Iron- 0.44

Lead- 0.12

Explanation:

I hope this helps! :))))

The value of S2 is S₂ = 2.1 g/L.Approximately 2.1 g of the gas will dissolve in 2 L of water at 0.6 ATM, assuming the temperature remains constant.

To determine the amount of gas that will dissolve in 2 L of water at 0.6 ATM, we can use Henry's law, which states that the solubility of a gas is directly proportional to the partial pressure of the gas above the liquid.

According to Henry's law, the solubility of a gas can be represented as:S₁/P₁ = S₂/P₂,,where S₁ and S₂ are the solubilities of the gas at the respective pressures P₁ and P₂.Given that 7 g of the gas dissolves in 1 L of water at 2.0 ATM, we can consider this as our initial condition, denoted by S₁/P₁.

Now, we need to find the solubility at 0.6 ATM in 2 L of water, denoted by S₂/P₂.Since the temperature remains constant, we can assume that the solubility of the gas does not change. Therefore, we can rewrite the equation as:

S₁/P₁ = S₂/P₂,

Substituting the known values, we have:

(7 g/1 L)/(2.0 ATM) = S₂/(0.6 ATM),

Solving for S₂, we get:

S₂ = (7 g/1 L) * (0.6 ATM)/(2.0 ATM),

S₂ = 2.1 g/L.

For more such questions on temperature

https://brainly.com/question/4735135

#SPJ8

Answer:

See explanation

Explanation:

Poor irrigation: When too much water is used during irrigation or water is inefficiently used for irrigation purposes, there could be an overall decrease in the availability of water resources leading to vegetation loss and desertification. Therefore, water resources should be properly managed to avoid desertification.

Overgrazing: Overgrazing refers to excessive grazing of a grassland. When livestock are allowed to overgraze on a particular area, there is vegetation loss and consequent desertification. Grazing practices should be organized in such a way that grasslands are not subjected to overgrazing.

Poor tillage practices: Poor tillage practices such as continuous cropping makes the soil more porous and exposes the soil to erosion. There may be vegetation loss and finally desertification. Sustainable tillage practices such as shifting cultivation and bush fallowing should be adopted.

The grams of magnesium hydroxide needed to yield 8.00 moles of magnesium chlorate is approximately 466.64 g. None of the options provided match the calculated value of 466.64 g.

To determine the grams of magnesium hydroxide (Mg(OH)2) needed to yield 8.00 moles of magnesium chlorate (Mg(ClO3)2), we need to consider the balanced chemical equation for the reaction between magnesium hydroxide and chlorine.

The balanced equation is as follows:

2 Mg(OH)2 + 6 Cl2 → 2 Mg(ClO3)2 + 2 H2O

From the balanced equation, we can see that 2 moles of Mg(OH)2 react with 6 moles of Cl2 to produce 2 moles of Mg(ClO3)2.

Therefore, the stoichiometric ratio is 2 moles of Mg(OH)2 : 2 moles of Mg(ClO3)2.

To calculate the grams of Mg(OH)2 needed, we can use the stoichiometric ratio and the given moles of Mg(ClO3)2.

Given:

Moles of Mg(ClO3)2 = 8.00 moles

Using the stoichiometric ratio, we have:

8.00 moles Mg(ClO3)2 × (2 moles Mg(OH)2 / 2 moles Mg(ClO3)2) = 8.00 moles Mg(OH)2

To convert moles to grams, we need to multiply by the molar mass of Mg(OH)2.

The molar mass of Mg(OH)2 = (24.31 g/mol) + (2 * 16.00 g/mol) = 58.33 g/mol

Grams of Mg(OH)2 = 8.00 moles Mg(OH)2 × 58.33 g/mol = 466.64 g

Therefore, the grams of magnesium hydroxide needed to yield 8.00 moles of magnesium chlorate is approximately 466.64 g.

For  more such questions on magnesium chlorate

https://brainly.com/question/12358640

#SPJ11

Reagent bottles must be closed when not in use because they may contain volatile or sublime substances.

Reagent bottles are most commonly used to store chemical reagents, including acid and alkali solvents that can be safely stored due to anti-corrosion capabilities.

Reagent bottles, often known as graduated bottles, are glass, plastic, borosilicate, or related-substance containers with specific caps or stoppers. They are used in labs to store chemicals in liquid or powder form in cabinets or on shelves.

Some reagent bottles are tinted amber (actinic), brown or red to protect light-sensitive chemical compounds from visible light, ultraviolet and infrared radiation which may alter them; other bottles are tinted blue (cobalt glass) or uranium green for decorative purposes -mostly vintage apothecary sets.

To learn more about reagent bottle refers to;

https://brainly.com/question/11443360

#SPJ1

Answer: 6.25 L

Explanation:

Charles Law  V1/T1 = V2/T2

Convert temperature to Kelvin by adding 273.15

V2 = V1T2/T1

V2= 6.4 X 293.15/300.15 = 6.25 L

by using pro.gram..

\({\huge{\blue{\underline{\underline{ ═══════════}}}}}\)

\({\huge{\pink{\underline{\underline{❑❑❑❑❑❑❑❑❑～}}}}}\)

\({\huge{\orange{\underline{\underline{﹌﹌﹌﹌﹌﹌﹌﹌﹌♪}}}}}\)

\({\huge{\purple{\underline{\underline{✎﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏}}}}}\)

The piece of evidence that best identifies the type of reaction as nuclear or chemical is: Chemical, because a new substance is formed. Option 4

In this scenario, the observation that a new substance is formed is a key characteristic of a chemical reaction. Chemical reactions involve the rearrangement of atoms to form different substances with distinct properties. The formation of a new substance indicates a chemical change has occurred.

The other pieces of evidence listed do not necessarily point to a nuclear reaction:

Chemical, because energy is released during the reaction: Energy can be released in both nuclear and chemical reactions, so this observation alone is not sufficient to determine the type of reaction.

Nuclear, because energy is released during the reaction: While energy can be released in nuclear reactions, it is not exclusive to them. Chemical reactions can also release energy, such as in exothermic reactions.

Nuclear, because the mass decreased after the reaction: This observation suggests a change in mass, which could be indicative of a nuclear reaction. However, it is important to consider that chemical reactions can also involve changes in mass, such as the formation of gases or dissolution of a solid.

Overall, the most conclusive evidence to identify the type of reaction is the formation of a new substance, which aligns with a chemical reaction.

Option 4

For more such questions on Chemical visit:

https://brainly.com/question/29886197

#SPJ8

Answer:

Voltage is the measure of electric potential energy per unit charge, current is the flow of electric charge through a circuit, and resistance is the property of a material that opposes the flow of electric current.

Ohm's Law relates these three concepts by stating that current is directly proportional to voltage and inversely proportional to resistance.

Hope this helps!

The beaks that were more common in the 1984 abundance of rain were the  finches that has larger beaks.

Darwin saw that the finches on the Galapagos had a graduated range of beak sizes and forms and hypothesized that these species had evolved from a single original mainland species.

Note that the Finches evolved on the Galápagos Islands based on the diverse types of food available there; long, pointed beaks were useful for snatching insects, while broad, blunt beaks are known to be excellent for cracking seeds as well as nuts.

Learn more about Finches from

https://brainly.com/question/16724412
#SPJ1

The result of the reaction between 2.2 g of Al and 1.8 g of O2 is the formation of 3.89 g of \(Al_{2} O_{3}\).

The given masses of Al and \(O_{2}\) are in a ratio of approximately 1:1. Therefore, we can assume that all the Al reacts with all the O2, and use stoichiometry to determine the products and reactants involved.

The balanced chemical equation for the reaction between Al and O2 is:

                                       4 Al + 3 \(O_{2}\) → 2 \(Al_{2} O_{3}\)

Using the molar masses of Al (26.98 g/mol) and \(O_{2}\) (32.00 g/mol), we can convert the given masses into moles:-

2.2 g Al × (1 mol Al/26.98 g Al) = 0.0815 mol Al

1.8 g \(O_{2}\) × (1 mol \(O_{2}\)/32.00 g \(O_{2}\)) = 0.0563 mol \(O_{2}\)

From the balanced chemical equation, we can see that 4 moles of Al react with 3 moles of \(O_{2}\) to produce 2 moles of Al2O3. Therefore, the limiting reactant is \(O_{2}\), since there are fewer moles of \(O_{2}\) than required by the stoichiometry of the reaction.

Using the mole ratio from the balanced chemical equation, we can determine the amount of \(Al_{2} O_{3}\) produced:

0.0563 mol \(O_{2}\) × (2 mol \(Al_{2} O_{3}\)/3 mol \(O_{2}\)) × (101.96 g Al2O3/mol) = 3.89 g \(Al_{2} O_{3}\).

To know more about chemical equation:

brainly.com/question/11231920

#SPJ1

Answer: It is option 4

Explanation:

The Chlorine have to share 2 electrons

Answer: 177.23 g.

Explanation:

the volume of the aluminum bar is

1.7 cm x 3.0 cm x 12.9 cm

= 65.61 cm^3

2.7 g/cm^3 x 65.61 cm^3

177.23g

Answer:

Cautiously and avoiding filling in the central area so that it does not overflow when filling, since being very beach makes filling difficult.

Explanation:

The basins are shallow, that is why filling is difficult, the filling must be slow, low intensity and at the edges not placing the water filling in the center of the basin.

When you fill a basin with liquid water, you can see that the water takes the shape of the container in which it is contained. This is because in the liquid state, water has molecules farther apart than in the solid state.

You can notice this property when performing an experiment with liquid and solid water.

When filling a glass, liquid water takes on the shape of a glass, and solid water, such as an ice cube, remains the same shape when placed in a glass.

Therefore, when filling a basin with water we perceive a property of the physical state of water, in liquid form. Water is one of the few substances that can be found naturally in liquid, solid and gaseous states.

Learn more here:

https://brainly.com/question/23650420

When you are sweating or shivering, you are exhibiting your limits of tolerance.

The human body can only withstand certain amounts of environmental stress. A key element in defining the body's tolerance limitations is temperature. Only a small range of temperatures is tolerable for the human body, and both hypothermia and hyperthermia can be fatal. Air pressure and humidity both have an impact on how well the body can withstand the environment. Altitude sickness and dehydration are both caused by low air pressure and high humidity, respectively. The body's capacity to endure the environment can also be impacted by pollution and chemical exposure. While exposure to radiation can result in cancer and genetic damage, noise pollution can also induce stress and hearing loss. Overall, a complex interplay of many environmental influences affects the human body's tolerance thresholds.

To know more about the limits of tolerance, check out:

https://brainly.com/question/26145317

#SPJ1