Nitric acid can be formed in two steps from the atmospheric gases nitrogen and oxygen, plus hydrogen prepared by reforming natural gas. In the first step, nitrogen and hydrogen react to form ammonia:

N2 (g)+ 3H2(g) → 2NH3(g)

In the second step, ammonia and oxygen react to form nitric acid and water:

NH3(g)+ 2O2(g) → HNO3(g) + H2O(g)

Calculate the net change in enthalpy for the formation of one mole of nitric acid from nitrogen, hydrogen and oxygen from these reactions. Round your answer to the nearest .

(I) kinetic energy of the boy when he hits the ground =potential energy

I. e ½mv²=mgh where g is 10ms-²

m=34kg, g=10ms² , h=3m

=34×10×3

=1020j

(i i) v²=u²+2gh

v²=0²+2×10×3

= 60

v=sqrt of 60

Answer:

Explanation:

45

The mass concentration of sand in the ethanol solution is 0.299 g/dm³.

To find the concentration in grams per cubic decimeter (g/dm³), we first need to convert the volume from liters to cubic decimeters (dm³). Since 1 liter is equal to 1 cubic decimeter, we can directly convert the volume.

Given:

Mass of sand = 0.2 g

Volume of ethanol = two-thirds liter

Converting volume to dm³:

1 liter = 1 cubic decimeter

two-thirds liter = (2/3) cubic decimeter = 0.67 dm³ (rounded to two decimal places)

Now we can calculate the concentration in g/dm³ by dividing the mass of sand by the volume in dm³:

Concentration = Mass / Volume

Concentration = 0.2 g / 0.67 dm³

Concentration ≈ 0.299 g/dm³ (rounded to three decimal places)

Learn more about mass concentration at: https://brainly.com/question/23437000

#SPJ1

Answer:

Point the syringe upright and tap firmly to move the bubbles to the top and expel by pushing the plunger

Explanation:

If you hold the syringe upside down the bubbles will end up at the bottom of the syringe by the plunger since they float up when tapped

Answer:

Explanation:

\we must convert the mass of NaCl in grams into moles. We do this by dividing by the molecular weight of NaCl (58.4 g/mole). Then, we divide the number of moles by the total solution volume to get concentration. The NaCl solution is a 0.1 M solution.

Answer:

0.125

Explanation:

boom

7.54 *\(10^8\) meters is  75.4 nanometers.

To convert 7.54 *  \(10^8\) meters to nanometers, you can multiply the value by \(10^9\)

as,  \(10^9\)nanometers = 1  meter.

7.54 * \(10^8\) m * \(10^9\) =  7.54 x \(10^1\) nm

Therefore, 7.54 *\(10^8\) meters is equal to 75.4 nanometers.

learn more about conversion:

https://brainly.com/question/13076223

To convert 7.54 x 10^-8 meters to nanometers, you multiply 7.54 x 10^-8 by 1 x 10^9 to get 75.4 nanometers.

To convert meters to nanometers, you need to know that 1 meter is equivalent to 1 x 109 nanometers. Therefore, if you were to convert 7.54 x 10-8 m to nanometers, you would multiply 7.54 x 10-8 by 1 x 109.

Here's how you'd do it: 7.54 x 10-8 m * 1 x 109 nm/m = 75.4 nm. So, 7.54 x 10-8 meters is equivalent to 75.4 nanometers.

https://brainly.com/question/32030244

#SPJ2

Answer:

sis aap ye I'd seach karke follow karo ok plz

Explanation:

baad me unfollow kar dena

XxcutemudaxX

Answer:

115g

Explanation:

100*8=800

800+150+200=1150

1150/10=115

Answer:

2.645

Explanation:

Rate of diffusion formula:

Sqrt(mass2/mass1)

>>sqrt(14/2)

(Note:Hydrogen must exist in dwiatomic, [H2])

Formula of the compound is Cu2O and molar mass of the compound is 143.1 g/mol

Make use of chemical formula to determine the number of atoms of each element in the compound.

Multiply atomic weight of each element with its number of atoms present in the compound.

Add up all of them and assign unit as grams/mole.

Determine the molar mass of the compound

Molar mass of the compound can be obtained as followed:

Molar mass of Cu = 63.55 g/mol

Molar mass of O = 16 g/mol

Molar mass of Cu2O = ?

Molar mass of Cu2O = (63.55 × 2) + 16

= 127.1 + 16

= 143.1 g/mol

Learn more about molar masses here:

brainly.com/question/21334167

#SPJ13

Answer:

1. positive 2. Ion 3. Negative 4. anion

Explanation:

Hope this helps you! :)

The partial pressure of nitrogen on Venus is approximately 321.914 kPa.

To find the partial pressure of nitrogen on Venus, we need to calculate the partial pressure using the mole fraction of nitrogen and the total atmospheric pressure. First, we convert the total atmospheric pressure from psi to kilopascals (kPa) since the mole fraction is given in terms of kPa.

1 psi = 6.89476 kPa

Therefore, the total atmospheric pressure on Venus is:

1334 psi × 6.89476 kPa/psi = 9197.53 kPa

Next, we can calculate the partial pressure of nitrogen using the mole fraction. The mole fraction of nitrogen is given as 0.035, which means that nitrogen makes up 3.5% of the total moles of gas in the atmosphere.

The partial pressure of nitrogen is given by:

Partial pressure of nitrogen = Mole fraction of nitrogen × Total atmospheric pressure

Partial pressure of nitrogen = 0.035 × 9197.53 kPa

Partial pressure of nitrogen = 321.914 kPa

Therefore, the partial pressure of nitrogen on Venus is approximately 321.914 kPa.

It's important to note that the given atmospheric composition of Venus's atmosphere and the total atmospheric pressure are approximate values and can vary depending on specific conditions and measurements.

For more such question on partial pressure visit:

https://brainly.com/question/19813237

#SPJ8

The elements in the 4th period on the periodic table are arranged in order of increasing their atomic number.

The modern periodic table can be defined as the arrangement of chemical elements. Elements are orderly arranged according to their increasing atomic number and similar chemical properties. This periodic table is organized in the forms of columns and rows which are named periods and groups.

The 118 elements are present in 18 groups and 7 periods in the modern periodic table. The elements placed in the same group and possessing the same valence electronic configuration possess identical chemical properties. Whereas the elements placed in the same period possess an increasing order of their valence electrons but the electrons are occupied in the same electron shell.

Therefore,  in the modern periodic table, the elements are organized as the periodic function of their atomic number. The number of valence electrons is not increased continuously throughout the period of moving left to right.

Learn more about the periodic table, here:

brainly.com/question/11155928

#SPJ1

Answer:

Genetic Diversity Examples

Genetic diversity is the total number of genetic characteristics in the genetic makeup of a species, it ranges widely from the number of species to differences within species and can be attributed to the span of survival for a species.

Explanation:

i hope this helps u.

There are 3.44 x 10^{22} particles in 0.057 moles of lithium bromide.

The lithium bromide formula also known as the lithium monobromide formula or Bromo lithium formula is explored. It is a counterion bromide-based salt of lithium.

we have to use Avogadro's constant,

Avogadro's constant, is approximately equal to 6.022 x 10^{22} particles per mole.

we can use the following formula:

number of particles = moles x Avogadro's constant

Substitute the values,

number of particles = 0.057 moles x 6.022 x 10^{23} particles/mol

Simplifying the equation

number of particles = 3.44 x 10^{22} particles

To know more about lithium bromide visit:

https://brainly.com/question/16584013

#SPJ9

Answer:

sodium carbonate

Explanation:

sodium carbonate

Answer: According to the molecular orbital theory the shape and size of molecular orbital depends upon- Shape and size of combining atomic orbitals.

Explanation:

we would need 2625.13 grams (or 2.62513 kilograms) of NaCl.

To calculate the mass of NaCl required to produce a 26.4 mol/L solution with a 1.7 L volume, we need to use the formula that relates the mass of solute, moles of solute, and molarity:Molarity (M) = moles of solute / liters of solution Rearranging this formula, we get:moles of solute = Molarity (M) x liters of solutionWe can use this formula to find the moles of NaCl needed:moles of NaCl = 26.4 mol/L x 1.7 L = 44.88 molNow, we can use the molar mass of NaCl to convert from moles to grams. The molar mass of NaCl is 58.44 g/mol:mass of NaCl = moles of NaCl x molar mass of NaClmass of NaCl = 44.88 mol x 58.44 g/mol = 2625.13 gTo produce a 26.4 mol/L solution with a 1.7 L volume.

for more question on NaCl

https://brainly.com/question/23269908

#SPJ8

According to the standard metric system, the correct figure indicating the right answer in a is 100 cm of baseball, and in b 230 ml of milk in glass and man of weight 75 kg.

There are certain standard units used for the measurement of each parameter. For example, the mass of a person is said in kg. The volume of a liquid is expressed in ml or L. Similarly, the the width of an area is expressed in mm or cm for a small object.

The length of a the ball is expressed in centimeters. Hence, 100 cm is the answer. The volume of milk in the glass is 230 ml of milk  and man of weight 75 kg is correct.

The volume in the table spoon is 15 ml and the weight of paper clip is 50 g. Similarly the width of hand is 100 mm.

Find more on metric system:

https://brainly.com/question/25966695

#SPJ1

The human population grew from 1 billion in the year 1800 to approximately 7.8 billion in the year 2021.

In the year 1800, the estimated global human population was around 1 billion. Over the next two centuries, significant advancements in technology, medicine, agriculture, and improved living conditions contributed to a rapid increase in population.

The growth rate of the human population began to accelerate in the 20th century. By the year 1927, the global population reached 2 billion. It took just 33 years for the population to double, reaching 4 billion in 1960. The population continued to grow at an unprecedented rate, with 6 billion people on Earth by the year 1999. As of 2021, the estimated global population stands at approximately 7.8 billion.

This remarkable growth in population can be attributed to several factors, including advancements in healthcare leading to reduced infant mortality rates, improved access to education and contraception, increased agricultural productivity, and overall socio-economic development.

It's important to note that population growth has not been uniform across all regions. Different countries and regions have experienced varying rates of population growth due to factors such as fertility rates, mortality rates, migration patterns, and government policies.

For more such questions on population visit:

https://brainly.com/question/30148263

#SPJ8

Answer: you have to talk to someone who wont mind wanting to wanting to like you a lot like that.

Explanation:  I wish I could be able to talk to someone who would want to get to like me like that, so its a very relatable situation.

Answer: 500g

Explanation:

We are asked to find the theoretical yield of a reaction, and we are given the following information:

In order to find the the theoretical yield we must use the following formula:

We have to convert the percents to real numbers before the calculations.  We can do it dividing the percent value into 100, so:

Answer:

Types of Potential Energy

Elastic Potential Energy. Anything that can act like a spring or a rubber band can have elastic potential energy. ...

Gravitational Potential Energy. There is a constant attractive force between the Earth and everything surrounding it, due to gravity. ...

Chemical Potential Energy.

(IF THIS HELPED CAN YOU PLEASE GIVE ME A BRAINYLEST?)

Answer:

87 is the wight of the hight

Explanation:

Answer:

the rate at which reactants form products is the same as the rate at which products form reactants

Explanation:

There is still  a reaction happening just that the second one happens the opposite happens and keeps it at net 0

Answer:

The correct answer is algae bloom

Explanation:

Algae bloom is a situation in which there is an uncontrollable increase in the amount/growth of algae in a water body (freshwater or marine water). This abnormal increase eventually gives the water body a different colour which is from the pigment of the algae. The processes involved in algae bloom leads to lowered oxygen levels in the water-body which causes the death of several aquatic organisms in the water-body. Since water pollution can be described as the processes involved in causing adverse effects that can contaminate a water-body which can lead to loss of aquatic animals and/or affect the physical properties of the water, algae bloom (as described earlier) is the correct option.

NOTE: volcanic activities and earthquakes may cause air pollution as they release several substances into the air but can hardly be directly linked to water pollution.

Answer:

d) all of the aboved

Explanation:

EDG2020

One liquid substance that could be used in the laboratory for dissolving dry mortar on floor tiles is hydrochloric acid (HCl). Hydrochloric acid is a strong acid commonly used in laboratories for various purposes, including cleaning and dissolving mineral deposits.

When dry mortar, which is primarily composed of cement, hardens on floor tiles, it can be challenging to remove using traditional cleaning methods. However, hydrochloric acid can effectively dissolve and break down the cementitious components of the mortar.

It is important to note that when using hydrochloric acid, proper safety precautions should be followed, such as wearing protective gloves, goggles, and working in a well-ventilated area.

Additionally, it is crucial to dilute the hydrochloric acid to an appropriate concentration for the specific task, as using it undiluted can cause damage to the tiles or other surfaces.

For more such questions on laboratory

https://brainly.com/question/29455421

#SPJ11

As a result, 2.75 moles of KCLO3 are needed.

Divide the mass by the molar mass (122.6g/mole) of KClO3 to get the moles, which is 0.626. To determine the amount of O2 produced, multiply that by the molar ratio: (0.062) x (3/2) = 0.939 moles of oxygen.

The balanced chemical equation for KClO3's breakdown is:

2 KClO3(s) → 2 KCl(s) + 3 O2(g)

The equation states that 3 moles of O2 are created for every 2 moles of KClO3 that break down. Thus, we can apply a ratio to determine how much O2 is generated from 2.75 moles of KClO3:

(3 mol O2 / 2 mol KClO3) x 2.75 mol KClO3

= 4.125 mol O2

Now, we may convert moles to grammes using the molar mass of oxygen:

4.125 mol O2 x 32.00 g/mol

= 132 g O2

Therefore, 2.75 moles of KClO3 will produce 132 grams of O2.

To know more about moles visit:-

https://brainly.com/question/26416088

#SPJ1

Nuclear changes involves changes in the composition of the nucleus of atoms with the release of large amounts of energy.

Nuclear changes are changes which occur in the nucleus of atoms of elements.

Nuclear changes involves radioactive decays to give radiation and energy spontaneously known as radioactivity.

In this type of nuclear change no energy is required to start the reaction but large amount of energy are released.

Nuclear changes can also involve splitting of large nucleus into smaller nucleus of atoms known as nuclear fission or the formation of larger nucleus from the combination of two or more smaller nuclei known as nuclear fusion.

Energy is required to start nuclear fission and fusion but the energy released is far greater.

When compared with energy changes in chemical reactions, the energy released in nuclear reactions is far greater.

Therefore, nuclear changes involves changes in the composition of the nucleus of atoms with the release of large amounts of energy.

Learn more about nuclear changes at: https://brainly.com/question/25819143

#SPJ1

Answer:

6598 mL = 6598 cm^3

Explanation:

Cubic centimeters (cc) and milliliters (mL) are both units of volume measurement. They are equivalent, meaning that 1 mL is equal to 1 cm^3. To convert from mL to cm^3, we simply multiply the volume in mL by 1.

To convert 6598 mL to cubic centimeters, we can use this conversion factor:

1 mL = 1 cm^3

Therefore, we can multiply 6598 mL by 1 to get the equivalent volume in cubic centimeters.

6598 mL x 1 cm^3/mL = 6598 cm^3

So, 6598 mL is equal to 6598 cm^3.