Explain the energy changes that occur when the following reaction happens:
H2 + Cl2 → 2HCl

A. Energy is absorbed when the HCl bonds form.

B. Energy is needed to break the bonds of H-H in H2 and Cl-Cl in Cl2

C. Energy is released when the bonds of H-H in H2 and Cl-Cl in Cl2 break.

D. Energy is released when the H-Cl bonds form.

E. No energy changes occur when this reaction happens.

Answer:

In CO, the oxidation number of carbon is +2 and that of oxygen is -2

In H2 the oxidation number of hydrogen is zero

In CH3OH, the oxidation state of carbon is -2, that of hydrogen is +1 and that of oxygen is -2

Explanation:

The oxidation number of an element in any compound is defined as the electrical charge that the element appears to have as determined by a set of arbitrary rules. These rules make it possible to calculate the oxidation number of an atom in a compound given the oxidation numbers of other atoms in the same compound.

In CO, the oxidation number of carbon is +2 and that of oxygen is -2

In H2 the oxidation number of hydrogen is zero

In CH3OH, the oxidation state of carbon is -2, that of hydrogen is +1 and that of oxygen is -2

Answer:

B the answer is B thank you

Answer:

D. 0.079 mol

Explanation:

This question involving the number of moles of neon (Ne) gas can be solved using the ideal gas law, also called the general gas equation.

The formula for the general gas equation is:

PV = nRT

Where;

P = pressure (atm)

V = volume (Litres)

n = amount of substance (mol)

R = ideal gas constant

T = temperature (K)

In this question, P is given as 0.83atm, V = 2.2L, R = 0.0821 L.atm/mol.K, T= 283K, n = ?

We calculate 'n' by making it the subject of the formula i.e.

PV= nRT

Divide both sides by RT, we have;

n = PV/RT

Hence, we input our values

n = 0.83 × 2.2 / 0.0821 × 283

n= 1.826 / 23.2343

n = 0.07859

Hence, n is approximately 0.079 mol

Answer:

Explanation:

loss of habitat and contact with humans

Answer:

A

Explanation:

Loss of habitat and contact with humans contributed to the extinction of many large mammals.

Answer:

more

Explanation:

Answer:

A. More than on the Earth

Explanation:

Answer:

Percent Yield = 91.97%

Explanation:

Aluminum hydroxide Formula: Al(OH)3 Molar mass: 78 g/mol

Stomach acid Formula: HCl Molar mass: 36.46 g/mol

Aluminum Chloride Formula: AlCl₃ Molar mass: 133.34 g/mol

14g Al(OH)3

2Al(OH)3 + Cl2 → 2Al(OH)3Cl

Balanced equation

14/156 = 0.0897 Moles of Al(OH)3

Ratio is 2:1:2 so same ratio for Al(OH)3 to AlCl₃

0.0897 x 266.68 = 23.92grams of AlCl₃

Theoretical yield of aluminum chloride

Actual yield aluminum chloride 22.0 g

Percent yield?

Percent Yield = (actual Yield/Theoretical yield) x 100

Percent Yield = (22/23.92) x 100

Percent Yield = 91.97%

The percent yield of aluminum chloride in the neutralization reaction has been 91.97%.

The balanced reaction for neutralization of stomach acid with aluminum hydroxide has been:

[tex]\rm Al(OH)_3\;+\;3\;HC\l\rightarrow\;AlCl_3\;+\;3\;H_2O[/tex]

The reaction has been determined that 1 mole of aluminum hydroxide forms 1 mole of aluminum chloride. The moles of aluminum hydroxide has been given as:

Moles =  [tex]\rm \dfrac{Mass}{Molecular\;mass}[/tex]

Moles of Aluminum hydroxide = [tex]\rm \dfrac{14}{156}[/tex]

Moles of Aluminum hydroxide = 0.0897 mol.

Thus, the aluminum chloride formed has been:

1 mole Aluminum hydroxide = 1 mole aluminum chloride

0.0897 mole aluminum hydroxide = 0.0897 mole aluminum chloride

The mass of Aluminum chloride formed has been:

0.0897 mole aluminum chloride = [tex]\rm \dfrac{Mass}{266.68}[/tex]

Mass of Aluminum chloride = 0.0897 mol × 266.68 g/mol

Mass of Aluminum chloride = 23.92 grams

The %yield can be given as:

%Yield = [tex]\rm \dfrac{Actual\;yield}{Theoretical\;yield}\;\times\;100[/tex]

The theoretical yield = 23.92 grams

The actual yield = 22 grams

% Yield = [tex]\rm \dfrac{22}{23.92}\;\times\;100[/tex]

% Yield = 91.97%.

The percent yield of aluminum chloride in the neutralization reaction has been 91.97%.

For more information about the neutralization reaction, refer to the link:

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Answer:

There’s a high need for energy storage and are very expensive. Renewable energy is also not always available because some need sun while others need wind.

Explanation:

Answer:2 for 5, 6 for7

Explanation:

Answer:

Conjugate acid is H3O

Explanation:

HCl + H2O = H3O + Cl

HCl = H+ and Cl- = Acid

H2O = OH- and H+ = Neutral as equal OH- and H+

H3O = H3O+ = Acid also known as Hydronium

Cl = Just free floating Chlorine = Cl-

Conjugate acid is H3O

Acid = A solution with more H+ ions than OH- ions.

Explanation:

Ok so water is H2O and cabon dioxide in the air is CO2, so the water goes through the carbon dioxide and makes acid rain H2SO4.

Now we have our limestone which is CaCO3.

What happens is that the acid breaks apart our limestone into Ca2+ and CO3 2-. This then reforms into Calcium bicarbonate Ca(CO3)2.

Calcium bicarbonate is soluble in water and is hence washed away by the rain eroding the limestone.

Answer:

159 g OF LiNO2 WILL BE USED TO MAKE 0.25 L OF 0.75 M SOLUTION.

Explanation:

How many grams of LiNO2 are required to make 250 mL of 0.75 M?

First calculate the molarity in mol per dm3

0.75 M of LiNO2 reacts in 250 mL = 250 /1000 L volume

0.75 M = 0.25 L

In 1 L, the molarity of LiNO2 will be:

= (0.75 * 1/ 0.25) M

= 3 mol/dm3 of LiNO2

Next is to calculate the molarity in g/dm3:

Molarity in mol/dm3 = molarity in g/dm3 / RMM.

RMM of LiNO2

(Li = 7 , N =14 , 0 = 16)

RMM = ( 7 + 14 + 16 * 2) = 53 g/mol

Molarity in mol/dm3 =  Molarity in g/dm3 / RMM

Molarity in g/dm3 = Molarity in mol/dm3 * RMM

Molarity in g/dm3 = 3 * 53

Molarity in g/dm3 = 159 g/dm3.

So therefore, to make 250 mL of 0.75 M of LiNO2, we use 159 grams of LiO2.

Answer:

MgF2 - Salt

H2SO4 - Acid

Explanation:

Arrhenius Definition

Arrhenius acid is a substance that dissociates in water to form hydroxide (H+) ions.

Arrhenius base is a substance that dissociates in water to form hydroxide (OH–) ions.

H+

OH-

S2-

O2-

MgF2 - Salt as no Hydrogen

H2SO4 - Acid as converts to HSO4- and H+ upon dissociation in water.

Answer: 2 Acetate ions

Explanation:

Strontium Acetate, has the molecular formular to be; C4H6O4Sr ( or in a linear form, Sr(CH3COO)2), contains two acetate ions.

In one molecule of strontium acetate (Sr(CH₃COO)₂), there are two acetate ions (CH₃COO⁻).

We must first comprehend the chemical composition of strontium acetate in order to calculate the quantity of acetate ions present.

Acetate ions (CH₃COO⁻) and strontium ions (Sr²⁺) combine to linear form the ionic compound strontium acetate. Sr(CH₃COO)₂ is the chemical formula for strontium acetate.

(CH₃COO)₂ stands for two acetate ions in the formula. The (CH₃COO⁻) ion, also referred to as the acetate ion, is a polyatomic ion made up of two carbon (C), three hydrogen (H), and two oxygen (O) atoms. It has a -1 charge overall.

Thus, there are two acetate ions (CH₃COO⁻) in a single molecule of strontium acetate (Sr(CH₃COO)₂).

It's crucial to understand that in ionic compounds like strontium acetate, the ratio of positively charged ions (cations) to negatively charged ions (anions) must be balanced in order to produce a neutral compound. In this instance, the two -1 charges of the acetate ions (CH₃COO⁻) counterbalance the two +2 charges of the strontium ions (Sr²⁺), creating a neutral molecule.

To know more about linear form :

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Answer:

hey

Explanation:

Answer:

I'm really not sure

Explanation:

So there's the answer

Answer:

60g/mol

Explanation:

By using nucleon numbers given on the periodic table, the mass of 1 mole of each element is:

C= 12g

H= 1g

O= 16g

Since molar mass is the sum of the masses of each element present in the compound,

Molar Mass (Mr) = 12+3(1)+12+16(2)+1 = 60g/mol

Answer:

2CO + O ₂ → 2CO ₂

Explanation:

CO + O ₂ → CO ₂

Left Side

C = 1

O = 3

Right Side

C = 1

O = 2

So we'll balance the oxygen first

2CO + O ₂ → 2CO ₂

Left Side

C = 2

O = 4

Right Side

C = 2

O = 4

Ok so balancing the O has also balanced the C

Answer:

It will reduce the quantity of metals extracted for use in the manufacturing of electronics

Explanation:

The manufacturing of electronics is a huge market for the metal extraction industry. Many electronics have metal casing, metal circuit boards etc. This implies that a large quantity of metal is required for the production of electronics. This leads to consistent mining activities in order to supply enough quantity of metal to produce more electronics.

However, if electronics are recycled, less metals are extracted for the electronics industry. This saves energy required for mining operations and minimizes the deleterious environmental impact associated with metal mining from the earth. These deleterious consequences include; erosion, sinkholes, loss of biodiversity, contamination of soil, groundwater, and surface water by the chemicals emitted from mining processes.

Hence, recycling of electronics saves the environment from the degradation caused by consistent mining activities. Reduction of mining activities by recycling ought to be an important goal of the electronics manufacturing industry.

Answer:

The gravitational  force between the satellites is [tex]3.81\times 10^{10}\ N[/tex].

Explanation:

Mass of satellite 1, [tex]m_1=5.3\times 10^{12}\ kg[/tex]

Mass of satellite 2, [tex]m_2=3.5\times 10^8\ kg[/tex]

Distance between masses is 1.8 m

It is required to find the gravitational  force between the satellites. The formula used to find the force between two masses is given by :

[tex]F=G\dfrac{m_1m_2}{r^2}\\\\F=6.67\times 10^{-11}\times \dfrac{5.3\times 10^{12}\times 3.5\times 10^8}{(1.8)^2}\\\\F=3.81\times 10^{10}\ N[/tex]

So, the gravitational  force between the satellites is [tex]3.81\times 10^{10}\ N[/tex].

Answer:

There is less oxygen because there are less trees to produce it.

Answer:

There will be less oxygen for us to breathe

Explanation:

This is because trees produce oxygen when they do photosynthesis and without as many trees we get less and less oxygen produced

Answer:

           1s², 2s², 2p³  

Explanation:

The atomic number of Nitrogen is seven. So it contains seven protons and seven electrons in neutral form. Also, the electronic configuration cited above contains seven electrons among which two electrons are present in first shell and five electrons are present in valence shell respectively.