Which reaction is balanced correctly?
C 6H 12O6 + 3O 2 → 6CO 2 + 6H 2O
CH 4 + 4O 2 → CO 2 + 2H 2O C
3H 8 + 5O 2 → 3CO 2 + 4H 2O
C + O 2 → 2CO 2

Answer:

8: D

9: A

10: C

11: B

Answer:

Assuming it was collected from the atmosphere it would be virtually nothing

Explanation:

hydrogen makes up 0.000055% of the atmosphere while oxygen makes up 23 percent. 20/400000 cm^3 of hydrogen

Answer: use methods to clean up ocean oil spills

Explanation:

Answer:

D. 4

Explanation:

Answer and Explanation: Carbon can form a maximum of four covalent bonds. Carbon can share up to four pairs of electrons, therefore, the carbon atom fills its outer energy level and achieves chemical stability.

Answer: true

Explanation:

Thermal efficiency of process heating equipment

Answer:

1. 25 moles water.

2. 41.2 grams of sodium hydroxide.

3. 0.25 grams of sugar.

4. 340.6 grams of ammonia.

5. 4.5x10²³ molecules of sulfur dioxide.

Explanation:

Hello!

In this case, since the mole-mass-particles relationships are studied by considering the Avogadro's number for the formula units and the molar mass for the mass of one mole of substance, we proceed as shown below:

1. Here, we use the Avogadro's number to obtain the moles in the given molecules of water:

\(1.5x10^{25}molecules*\frac{1mol}{6.022x10^{23}molecules} =25 molH_2O\)

2. Here, since the molar mass of NaOH is 40.00 g/mol, we obtain:

\(1.2mol*\frac{40.00g}{1mol} =41.2g\)

3. Here, since the molar mass of C6H12O6 is 180.15 g/mol:

\(45g*\frac{1mol}{180.15g}=0.25g\)

4. Here, since the molar mass of ammonia is 17.03 g/mol:

\(20mol*\frac{17.03g}{1mol}=340.6g\)

5. Here, since the molar mass of SO2 is 64.06 g/mol:

\(48g*\frac{1mol}{64.06g} *\frac{6.022x10^{23}molecules}{1mol} =4.5x10^{23}molecules\)

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Answer:

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

\(volume = \frac{mass}{density} \\\)

From the question we have

\(volume = \frac{3.50}{5.61} \\ = 0.6238859...\)

We have the final answer as

Hope this helps you

Answer:

The amount of thermal energy stored in an object depends on three things.

Answer:

Explanation:

The three subatomic particles: protons with a positive charge, neutrons with a neutral charge, and electrons with a negative charge. The atomic mass can be found by adding the amount of protons and the amount of neutrons together. Therefore, you can find the number of neutrons in an atom by subtracting the number of protons from the atomic mass.

The mass of \(\rm HClO_3\) Produced in the reaction has been given by the stoichiometric laws. The mass-produced in the reaction has been 141.03 grams.

The stoichiometric law has been the moles produced in the reaction and the reacted equivalent to the stoichiometric coefficient.

The mass of water in the reaction has been given as:

\(\rm Density=\dfrac{Mass}{Volume}\\ 0.998\;g/mol=\dfrac{Mass}{18\;ml}\\ Mass=17.964\;grams\)

The molar mass of water has been 18 grams/mol. Thus, 17.964 grams of water has been equivalent to 1 mol.

From the balanced chemical equation, the moles of \(\rm HClO_3\) Produced has been given as:

\(\rm 3\;mol\;H_2O=5\;mol\;HClO_3\\1\;mol\;H_2O=\dfrac{5}{3}\;\times\;1\;mol\;HClO_3\\ 1\;mol\;H_2O=1.67\;mol\;HClO_3\)

The moles produced has been 1.67 mol. The molar mass of the compound is 84.45 g/mol

The mass can be given as:

\(\rm Mass=Moles\;\times\;Molar\;mass\\Mass\;HClO_3=1.67\;\times\;84.45\;grams\\Mass\;HClO_3=141.03\;grams\)

The  mass of \(\rm HClO_3\) Produced in the reaction is 141.03 grams.

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The phenomena which  wind causes  are waves and surface currents.

Surface currents are caused by  winds  which blow over the ocean water and result in creation of waves. Surface currents  are horizontal streams of water which are capable of  flowing thousands of kilometers and can reach great depths.

Surface currents play a major role in determining the climate all over the world. They are influenced by three major factors 1) overall global wind patterns 2)rotation of earth 3)shape of ocean basins . When a surface  current collides with the land it  changes the direction of currents.

Because of surface currents the global climate has warmer water  from equator to the cooler parts of the ocean  as they transfer heat energy.

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Answer:

3.85

Explanation:

Calculate molar mass, starting with each element, then find grams per mole, then convert.

Answer:

1. some thing that has matter is an apple, a person,a table. things that does 2.not Light.,Sound.,Heat.Energy.Gravity.Time.A Rainbow.Love.

3. Physical changes only change the appearance of a substance, not its chemical composition. Chemical changes cause a substance to change into an entirely substance with a new chemical formula. Chemical changes are also known as chemical reactions.

4.A chemical reaction is usually accompanied by easily observed physical effects, such as the emission of heat and light, the formation of a precipitate, the evolution of gas, or a color change. Absolute confirmation of a chemical change can only be validated by chemical analysis of the products!

5.Precipitate: In chemistry, a solid formed by a change in a solution, often due to a chemical reaction or change in temperature that decreases solubility of a solid. In meteorology a precipitate is liquid or solid water (rain, snow, etc.) falling from the sky.

6.n simple terms, the endothermic reactions absorb energy from the surrounding that is in the form of heat. On the other hand, an exothermic reaction releases energy into the surrounding of the system.

hope this help plz give me a thxs and brainlyest and a five star thx and you welcome let me know if this helped

Explanation:

The final pressure of the gas of initial pressure 275 torr is 550 torr.

Pressure is the force acting normally per unit area to the surface of an object

To caluclate the final pressure of the balloon, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the final pressure is 550 torr.

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Answer:

c is the

Explanation:

Answer:

There are three types of intermolecular forces: London dispersion forces (LDF), dipole- dipole interactions, and hydrogen bonding. Molecules can have any mix of these three kinds of intermolecular forces, but all substances at least have LDF.

Answer:

A. Using materials and design techniques that reduce the negative

environmental impact of a structure

Explanation:

A P E X

Using materials and design techniques that reduce the negative

environmental impact of a structure. Hence, option A is correct.

Green design is the 'creation of buildings which are energy-efficient healthy, comfortable, flexible in use and designed for long life.

The word ‘Green’ represents designs which are eco-friendly and less harmful to humans and other organisms. It helps in the protection of natural resources such as water, air etc.

Green designs are also referred to as techniques and materials that reduce the negative environmental impact of a structure.

Hence, option A is correct.

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The mass of the ammonia that is required is  258 g.

The quantitative correlations between the reactants and products in a chemical reaction are the focus of the chemistry subfield known as stoichiometry.

We have to know that;

1 mole of CO2 produces 1 mole of urea

2.2 moles of CO2 produces 2.2 urea

Given that the number of moles of urea = 455 g/60 g/mol

= 7.58 moles

Now;

2 moles of NH3 produces 1 mole of urea

x moles of NH3 produces 7.58 moles of urea

x = 7.58 * 2/1

= 15.16 moles

Mass of the ammonia =  15.16 moles * 17 g/mol

= 258 g

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Answer: 14.0

Explanation: 14.0 is a base. The more basic, the less hydrogen ion concentration.

Answer: the new pressure of the gas is 15.55 atm, which is approximately 16 atm.

Explanation:

The question requires us to determine the new pressure of the gas, given the new temperature and volume of the gas.

The following information was provided by the question:

initial temperature = T1 = 35 K

inital volume = V1 = 26 L

initial pressure = P1 = 25 atm

final temperature = T2 = 67 K

final volume = V2 = 80 L

Since both temperature and volume changed from the initial and final condition, we'll need to use the inital values given (T1, V1 and P1) to determine the number of moles of the gas (as this value does not change), and then use this value, together with the final values given (T2 and V2), to determine the new pressure.

We'll apply the equation for ideal gases to solve this problem:

1) Calculating the number of moles of gas

We can rearrange the equation of ideal gases to calculate the number of moles:

We can use the constant of gases, R, as 0.082057 L.atm/K.mol.

Applying the values given by the question, we'll have:

Therefore, there are 226.3 moles of the gas.

2) Calculating the new pressure

Next, with the amount of moles of gas known, we can calculate the new pressure of the gas.

We can rearrange the equation of ideal gases to calculate the pressure:

And, applying the values provided by the question:

Therefore, the new pressure of the gas is 15.55 atm.

Complete the Lewis structure for AZT.

Azidothymidine excatly was the first antiretroviral agents that was the approved for use for the  treating HIV infection in the United States [1987] and was the  subsequently frequently used in antiretroviral regiments for so many years.

a- When the carbonate atomic are  bonded to 4 other atoms the hybridization is said to be sp3 type. Here 1 s orbitals and 3 p orbitals in the same type  shell of an atomic combine to form 4 new equivalents orbitals.To  the arrangements is tetrahedral within a bonds angles of  109.5o.

b-When the carbonate atomic are  bonded to 4 other atoms the hybridization is said to be sp3 type. Here 1 s orbitals and 3 p orbitals in the same type  shell of an atomic combine to form 4 new equivalents orbitals.To  the arrangements is tetrahedral within a bonds angles of  109.5o.

C-The 2s and all the three (3p) orbitals of carbon by the  hybridise to form 4 sp3 orbitals.

d,e-There are 4 types of bond's or interactions: there are ionic, covalent, and  hydrogen bonds, and van der Waals interactions.

f-The azide bond angle, ∠N(1)-N(2)-N(3), is 173.6°, 173.2° and 171.5° in AZT, CH3N3 and HN3, respectively, which clearly the indicated a non-linear  asymmetrical chains structures.

g-Hence there are 5 pi bond's presented in this is  molecules. f. Since it is N atomic undergoes to the sp hybridization, bond's ∆ is 180°.

h-The oxygenation is sp3 hybridised which means that it has 4 sp3 hybrids orbitals. 1 of the sp3 hybridized orbitals overlap with s orbitals from a hydrogen to form the O-H sigma bond's. One of the sp3 hybridized orbitals overlapping with an sp3 hybridised orbital from carbon to formulate the C-O sigma bonds.

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Answer:

the answer is 373

Explanation:

K=°C + 273

K=100+273=373

Answer:

Option C

Explanation:

According to Hund's rule

d subshell has 5 orbitals.

The amount of heat energy absorbed when 200 grams of water are heated from 20 C to 60 C is 33,440 Joules.

To find the amount of heat energy absorbed when 200 grams of water are heated from 20 C to 60 C, we can use the equation Q = mcAT.
First, we need to find the value of m, which is the mass of the water in grams. In this case, it is given as 200 grams.
Next, we need to find the value of AT, which is the change in temperature in degrees Celsius.

This can be calculated by subtracting the initial temperature from the final temperature, which gives us 60 C - 20 C = 40 C.
The specific heat capacity of water, C, is given as 4.18 Joules per gram per degree Celsius.
Now we can plug in the values into the equation:
Q = mcAT
Q = (200 g) x (4.18 J/g°C) x (40°C)
Q = 33,440 J
Therefore, the amount of heat energy absorbed when 200 grams of water are heated from 20 C to 60 C is 33,440 Joules.

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Explanation:

hybridization refers to the process of mixing atomic orbitals in a way that creates new hybrid orbitals. This is commonly observed in organic chemistry, where hybridization is used to explain the shapes and bonding properties of molecules.

The hybridization of atomic orbitals occurs when atoms bond to form molecules. In the hybridization process, the valence electrons of an atom are rearranged and redistributed in order to form new orbitals with different shapes and energies. This can result in stronger and more stable bonding between atoms.

The most common types of hybridization are sp, sp2, and sp3, which involve the mixing of s and p orbitals. For example, in the sp3 hybridization of carbon, the 2s orbital and three 2p orbitals are combined to form four sp3 hybrid orbitals, which are arranged in a tetrahedral shape.

The effects of hybridization in chemistry include changes in the bond angles, bond lengths, and overall shape of molecules. This can affect the reactivity and chemical properties of the molecule, such as its acidity or basicity.

The concentration of NaOH in molarity is calculated to be equal to 2.186 M.

Concentration of chemical substance expresses the amount of substance present in any mixture.

In a neutralization reaction between NaOH and HCl, the number of moles of HCl will be equal to the number of moles of NaOH.

n(NaOH) = n(HCl)

n is the number of moles.

n(HCl) = M(HCl) x V(HCl)

M is the molarity and V is the volume in liters.

n(HCl) = 0.65 M x 0.037 L = 0.02405 moles HCl

Since the number of moles of NaOH is the same as the number of moles of HCl, we can use the following formula to find the concentration of NaOH:

M(NaOH) = n(NaOH) / V(NaOH)

V(NaOH) = 11.0 mL / 1000 mL/L = 0.011 L

M(NaOH) = n(NaOH) / V(NaOH) = n(HCl) / V(NaOH)

M(NaOH) = 0.02405 moles / 0.011 L = 2.186 M

Therefore, the concentration of NaOH in molarity is 2.186 M.

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Due to its twofold charge, calcium oxide requires a far stronger force than sodium chloride to separate its ion pairs.

Melting point is a temperature at which substance start melting. An ion enough energy to break free from its neighbors' ionic bonds in order to melt an ionic solid. Each ion has six bulk neighbors (both, I presume, are fcc) or five at the surface face, three at the corner, and four at the edge.

Due to the doubling of charge from each neighbor, you need to supply at least three to five times as much thermal energy to calcium oxide as sodium chloride in order to free the ions.

Therefore, Due to its twofold charge, calcium oxide requires a far stronger force than sodium chloride to separate its ion pairs.

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Answer:

P, I, Cl, and O would form anions because they are nonmetals. Mg, In, Cs, Pb, and Co would form cations because they are metals.

Explanation:

Answer:

think I did this before and its V

The following balanced chemical equation may be used to describe the interaction between aluminum (Al) and calcium nitrate (Ca(NO₃)₂):

2 Al + 3 Ca(NO₃)₂ → 2 Al(NO₃)3 + 3 Ca

Reactants are the chemicals that begin a chemical reaction, while products are the compounds that are created as a result of the reaction.

The substances that initiate a chemical reaction. Products are the substances that are created during the reaction. Compounds or elements can act as reactants and products.

Aluminium and calcium nitrate interact in this reaction to form aluminium nitrate (Al(NO₃)₃) and calcium (Ca), which are the end products.

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