Help please!!!!

If the formula of ammonium nitrate is NH4NO3, determine how many moles of the solid were dissolved in the water

Answer:

the answer is neutron :)))))))))

I would say C.) It has been updated and modified based on the new data

Answer: please make the question more understandable

Explanation:

they are found on the crust

Answer:

crust

Explanation:

Answer:

4Na  +   O₂  →   2Na₂O  

6.82g

Explanation:

The combustion of sodium involves combining the element with oxygen gas:

              4Na  +   O₂  →   2Na₂O  

We have been given 5g of Na.

The balanced reaction equation is given as shown above. This reaction is also a synthesis or combination reaction.

b. Maximum amount of product that can be obtained.

Sodium is the limiting reactant and it will determine the amount of product that can be formed.

  To solve this, we find the number of moles of the given sodium.

  Mass of given sodium  = 5g

    Molar mass of Na  = 23g/mol

  Number of moles of Na  = [tex]\frac{mass}{molar mass}[/tex]  

Insert the parameters and solve;

 Number of moles of Na  = [tex]\frac{5}{23}[/tex]    = 0.217moles

  From the balanced reaction equation:

         4 moles of Na will produce 2 moles of Na₂O  

      0.217 moles of Na will produce [tex]\frac{0.217 x 2}{4}[/tex]   = 0.11mole of Na₂O  

So;

 Mass of Na₂O   = number of moles x molar mass

    Molar mass of Na₂O   = 2(23) + 16  = 62g/mol

 Mass of Na₂O   = 0.11 x 62  = 6.82g

Answer:

2.24dm³

Explanation:

Given parameters:

Mass of He = 40g

Unknown:

Volume of Helium  = ?

Solution:

To solve this problem, we convert the given mass to number of moles.

   Number of moles  = [tex]\frac{mass}{molar mass}[/tex]  

   molar mass of He  = 4g/mol

  Number of moles  = [tex]\frac{4}{40}[/tex]   = 0.1mole

So;

                  1 mole of gas at rtp occupies a volume of 22.4dm³

                0.1 mole of He will occupy a volume of 0.1 x 22.4 = 2.24dm³

Answer:

D, last one.

Explanation:

In order to use solar energy, we need solar panels.  Which we need sun for it to heat up, and once there is the sun.  The heat can hit the water, and cause the water to burn/boil

Answer:

June 20

Explanation:

Answer:

I think A does because there are so many letters in their so a

Answer:

C

Explanation:

A p orbital has the approximate shape of a pair of lobes on opposite sides of the nucleus.

Explanation:

A p orbital would have a du-bbell shape.

Options A and B show a spherical shape, which are for s orbitals.

Option D shows a double du-bbell / clover leaf shape, which is for d orbitals.

The answer is Option C.

P.S. The word is censored apparently, so be forgiving! Thanks~

Answer:

This strong current of warm water influences the climate of the east coast of Florida, keeping temperatures there warmer in the winter and cooler in the summer than the other southeastern states. Since the Gulf Stream also extends toward Europe, it warms western European countries as well.

Answer:

warm climates in northern Europe

Explanation:

I took the test in K12 and this was the answer :)

Answer:

second law

Explanation:

Answer: Positive

Explanation: Just a guess

Answer:

Positive

Explanation:

Answer: Inorganic chemistry

Explanation:

Inorganic chemistry can be defined as the branch of chemistry which studies the behavior of the inorganic compounds. Inorganic compounds are those compounds which lack carbon hydrogen bonding. The carbon monoxide, carbon dioxide, sodium chloride and water are the examples of inorganic compounds. This branch also studies the effect of these chemical compounds on the living things. The water and salts are chemicals which regulate the chemical and physiological reactions in the body.

Answer:

The difference in potential energy between the reactants and products

Explanation:

The difference in potential energy between the reactants and products reveals the enthalpy of reaction, hence option B is correct.

The change in the enthalpy of a chemical reaction that takes place at constant pressure is known as the heat of reaction also known as the enthalpy of reaction. It is a unit of measurement for thermodynamics.

In a thermodynamic system, energy is measured by enthalpy. Enthalpy is a measure of a system's overall heat content and is equal to the system's internal energy plus the sum of its volume and pressure.

The difference between  total product and total reactant molar enthalpies, computed for substances in their standard states, is the standard enthalpy of reaction for a chemical reaction.

Therefore, the difference in potential energy between the reactants and products reveals the enthalpy of reaction, hence option B is correct.

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Answer:

0.105 mol/dm³

Explanation:

From the question given above, the following data were obtained:

Mass of MgCl₂ = 10 g

Volume of solution = 1 dm³

Concentration of MgCl₂ =?

Next, we shall determine the number of mole present in 10 g of MgCl₂. This can be obtained as follow:

Mass of MgCl₂ = 10 g

Molar mass of MgCl₂ = 24 + (2 ×35.5)

= 24 + 71

= 95 g/mol

Mole of MgCl₂ =?

Mole = mass /Molar mass

Mole of MgCl₂ = 10 / 95

Mole of MgCl₂ = 0.105 mole

Finally, we shall determine the concentration of MgCl₂. This can be obtained as follow:

Mole of MgCl₂ = 0.105 mole

Volume of solution = 1 dm³

Concentration of MgCl₂ =?

Concentration = mole / Volume

Concentration of MgCl₂ = 0.105 / 1

Concentration of MgCl₂ = 0.105 mol/dm³

Concentration is [tex]0.105\ mol/dm^{3}[/tex]

Given:-

Mass of MgCl₂ = 10 g

Volume of solution = [tex]1\ dm^{3}[/tex]

Concentration of MgCl₂ =?

[tex]Molar mass of MgCl_2 = 24 + (2\times35.5)\\= 24 + 71\\= 95 g/mol[/tex]

 Mole of MgCl₂ =?

The number of moles is calculated by the equation as follows:-

[tex]Mole = mass /Molar massMole of MgCl_2= 10 / 95Mole of MgCl_2 = 0.105 mole[/tex]  

Determine the concentration of [tex]MgCl_2[/tex] as follows:-

Mole of MgCl₂ = 0.105 mole

Volume of solution = 1 dm³

Concentration of MgCl₂ =?

[tex]Concentration = mole / Volume\\Concentration\ of\ MgCl_2 = 0.105 / 1\\Concentration \ of\ MgCl_2= 0.105 mol/dm^{3}[/tex]

Hence the concentration of 10g of magnesium chloride is [tex]0.105 mol/dm^{3}[/tex].

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Answer:

 2Li   +   F₂    →    2LiF

Explanation:

The reaction expression is given as:

          Li   +   F₂    →     LiF

We are to balance the expression. In that case, the number of atoms on both sides of the expression must be the same.

 Let use a mathematical approach to solve this problem;

  Assign variables a,b and c as the coefficients that will balance the expression:

             aLi   +  bF₂    →     cLiF

Conserving Li: a  = c

                   F:  2b  = c

          let a = 1, c  = 1 and b  = [tex]\frac{1}{2}[/tex]  

  Multiply through by 2;

        a  = 2, b = 1 and c  = 2

               2Li   +   F₂    →    2LiF

Answer:

The process in which a solid changes directly to a gas is called sublimation. It occurs when the particles of a solid absorb enough energy to completely overcome the force of attraction between them. Dry ice (solid carbon dioxide, CO2) is an example of a solid that undergoes sublimation.

Answer:

Answer choice c  = 174

Explanation:

If you divide 30% into 580 you get 174. You can also check your work by doing 580 divided by 70%

30% divided by 580 = 174

Answer:

C6H12O6 + 6O2 + 38ADP + 38Pi => 6CO2 + 6H2O + 38ATP is the chemical equation for cellular respiration

Explanation:

Cellular respiration is the process by which cells breakdown glucose molecules to produce energy in the form of ATP molecules and release waste products such as carbon dioxide and water molecules. Cellular respiration involves a series of reaction pathways such as glycolysis, pyruvate oxidation, citric acid cycle and the oxidative phosphorylation pathway.

The first step of glycolysis breaks down a glucose molecule to release two pyruvate molecules.

In pyruvate oxidation, two molecules of pyruvate are oxidized to acetyl-CoA molecules.

In the citric acid cycle, the acetyl-CoA molecules are used to produce the electron carriers NADH and FADH2.

In the oxidative phosphorylation pathway, NADH and FADH2 donate their electrons to oxygen and ATP molecules are produced using the energy of electron transfer and proton-pumping.

The overall equation for cellular respiration is given as:

C6H12O6 + 6O2 + 38ADP + 38Pi => 6CO2 + 6H2O + 38ATP

Answer:

when sodium reacts with chlorine atoms, sodium will give an electron which is negative charged to chlorine.it makes sodium(+) and chlorine (-)..then sodium will attract chlorine to form sodium chloride(NaCl)

Answer:When acids react with carbonates,---CO2--------gas is liberated.

Explanation:

Acids liberate Carbon IV oxide when they react with  Carbonates  bicarbonate

For examples

Acid +carbonate  ⟶ Salt + Water + Carbon dioxide

Calcium carbonate + Hydrochloric acid  will give Calcium chloride with the liberation of CO2 gas and water

CaCO3 + 2HCl →CaCl2 + CO2 + H2O

To Test for the presence of the CO2 Liberated, we pass the gas through lime water, if the lime water turns milky, then C02 gas is confirmed.

Answer:

D.the metal atom use their positive charges to gain additional electrons until every atom has eight valence electrons.

The statement which best describes the metallic bonding is (B). The valence electrons between the metals become decoalized and can move freely between the metallic cations.Hence the correct option is (B).

Chemical bonds known as metallic bonds are produced by the electrostatic attraction of positively charged metal ions and conduction electrons.

A structure of positively charged ions may be thought of as sharing free electrons.

Atoms in a metallic substance are held together by a force called the metallic bond. Atoms in such a solid are packed closely together. Each metal atom's outermost electron shell typically overlaps with a significant number of its nearby neighbors.

Therefore, The statement which best describes the metallic bonding is (B). The valence electrons between the metals become decoalized and can move freely between the metallic cations.Hence the correct option is (B).

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Answer:

FLUORINE

The most reactive nonmetal is fluorine. Fluorine is a halogen, which is Group 17 on the periodic table, and the halogens are the most reactive nonmetals. This is because they all have one empty space in their valence electron shells.

Explanation:

Answer:

a)

Hmax=v2sin⁡2452g+hH_{max}=\frac{v^2\sin^2{45}}{2g}+hHmax​=2gv2sin245​+h

Hmax=2+62sin⁡2452(9.81)=2.92 mH_{max}=2+\frac{6^2\sin^2{45}}{2(9.81)}=2.92\ mHmax​=2+2(9.81)62sin245​=2.92 m

It is less than the height of the basket of 3.05 m. So, this is a miss.

b)

d=R=v2sin⁡(2⋅45)g=v2gd=R=\frac{v^2\sin{(2\cdot45)}}{g}=\frac{v^2}{g}d=R=gv2sin(2⋅45)​=gv2​

4.21=v29.814.21=\frac{v^2}{9.81}4.21=9.81v2​

v=6.43msv=6.43\frac{m}{s}v=6.43sm​

Answer:

No (I edited it because some people were confused )

Explanation:

In this way, cells are different from atoms and molecules. Atoms are not living things; they do not need food, water, and air; and they do not reproduce themselves. Cells are alive. Cells are bigger than atoms.

To see the number of atoms of an element in a given molecule we need to multiply stoichiometry to the number that is written on the foot of the element that is stoichiometry. Therefore, atoms are basic building block of any matter. Cells are building block of any living organism.

Atom is the smallest particle of any element, molecule or compound. Atom can not be further divided. Atoms contains nucleus in its center and electron that revolve around the atom in fixed orbit.

In the nucleus, proton and neutron are present. Electron has -1 charge while proton has +1 charge. Neutron is neutral that is it has no charge. So overall the charge of nucleus is due to only proton, not by neutron. Atoms are basic building block of any matter. Cells are building block of any living organism.

Therefore, atoms are basic building block of any matter. Cells are building block of any living organism.

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Answer:

Partial pressure of oxygen =  0.43 atm

Total pressure = 1.0 atm

Explanation:

Given data:

Volume of flask = 8.77 L

Temperature = 80°C (80 + 273.15 K = 353.15 K)

Mass of methane = 3.25 g

Mass of oxygen = 4.08 g

Partial pressure of oxygen = ?

Total pressure = ?

Solution:

Number of moles of methane:

Number of moles = mass/molar mass

Number of moles = 3.25 g/ 16 g/mol

Number of moles = 0.2 mol

Number of moles of oxygen:

Number of moles = mass/molar mass

Number of moles = 4.08 g/ 32 g/mol

Number of moles = 0.13 mol

Total number of moles in flask = 0.13 mol + 0.2 mol = 0.33 mol

Pressure of oxygen:

PV = nRT

R = general gas constant = 0.0821 atm.L/mol.K

P ×8.77 L = 0.13 mol × 0.0821 atm.L/mol.K  × 353.15 K

P = 3.77atm.L /8.77 L

P =  0.43 atm

Pressure of flask:

PV = nRT

R = general gas constant = 0.0821 atm.L/mol.K

P ×8.77 L = 0.33 mol × 0.0821 atm.L/mol.K  × 353.15 K

P = 8.75atm.L /8.77 L

P =  1.0 atm