the distinct shapes predicted by the vsepr theory are based on the attraction of electrons for each other. true false

When H₂S gas is removed from the system at equilibrium, the reaction shifts to the right (products) and the concentration of NH₃ increases (option C)

A French scientist (Chatelier) postulated a principle which helps us to understand a chemical system in equilibrium.

The principle states that If a an external constraint such as change in temperature, pressure or concentration is imposed on a system in equilibrium, the equilibrium will shift so as to neutralize the effect.

According to Chatelier's principle a decrease in concentration of the products will favor the forward (right) reaction.

From the above principle, we can conclude that when H₂S gas is removed from the system at equilibrium, the reaction shifts to the right (products) and the concentration of NH₃ increases.

Thus, the correct answer to the question is option C

Learn more about chemical equilibrium:

https://brainly.com/question/4289021

#SPJ1

Answer: D

Explanation:

An object can store energy as the result of its position. For example, the heavy ball of a demolition machine is storing energy when it is held at an elevated position. This stored energy of position is referred to as potential energy. Similarly, a drawn bow is able to store energy as the result of its position. When assuming its usual position (i.e., when not drawn), there is no energy stored in the bow. Yet when its position is altered from its usual equilibrium position, the bow is able to store energy by virtue of its position. This stored energy of position is referred to as potential energy. Potential energy is the stored energy of position possessed by an object. https://taraenergy.com/blog/an-introduction-to-potential-energy/

Answer:There are two types of polymers: synthetic and natural. Synthetic polymers are derived from petroleum oil, and made by scientists and engineers. Examples of synthetic polymers include nylon, polyethylene, polyester, Teflon, and epoxy. ... Examples of naturally occurring polymers are silk, wool, DNA, cellulose and proteins.

Explanation:

Answer: 6158.46

Explanation:

1 mole of helium gas contains 6.02 x1023 helium atoms. 1 mole of water contains 6.02 x1023 water molecules.

Answer:

1, 1, 2

Explanation:

1, 1, 2

Approximately 18.4832 mL of 0.250 M NaOH is required to neutralize 30.4 mL of 0.152 M HCl.

To determine the volume of 0.250 M NaOH required to neutralize 30.4 mL of 0.152 M HCl, we can use the concept of stoichiometry and the balanced chemical equation for the neutralization reaction between NaOH and HCl:

NaOH + HCl -> NaCl + H2O

From the balanced equation, we can see that the stoichiometric ratio between NaOH and HCl is 1:1. This means that for every mole of NaOH, we require an equal number of moles of HCl to neutralize.

First, let's calculate the number of moles of HCl present in the given volume:

Moles of HCl = concentration of HCl * volume of HCl

= 0.152 M * 30.4 mL

= 4.6208 mmol (millimoles)

Since the stoichiometric ratio is 1:1, the number of moles of NaOH required to neutralize the HCl is also 4.6208 mmol.

Now, let's calculate the volume of 0.250 M NaOH needed to contain 4.6208 mmol:

Volume of NaOH = (moles of NaOH) / (concentration of NaOH)

= 4.6208 mmol / 0.250 M

= 18.4832 mL

Therefore, approximately 18.4832 mL of 0.250 M NaOH is required to neutralize 30.4 mL of 0.152 M HCl.

learn more about NaOH here

https://brainly.com/question/20573731

#SPJ11

Ores: metal/coal (iron, gold, coal)

Mineral: not metal, (Granite, limestone,

Explanation:

calcium + hydrochloric acid to give calcium chloride and Hydrogen gas.

the state symbols represent:

s - solid

g - gas

l - liquid

aq- aqueous

it's not necessary to balance the word equation

If the frog cells swell and burst while the human cells shrink means that the solution will be hypotonic for frog cells while for human cells the solution will be hypertonic.

These changes will occur because in the frog cell there will be higher concentrations of ions than in the extracellular space, so water will enter the cell by osmosis to equalize the concentrations of the cells. While in the human cell there will be a lower concentration of ions than outside the cell, for this reason the water leaves it in order to equalize the concentrations both inside and outside the cell. Being then the hypotonic solution for the frog cell and hypertonic for the human cell.

Therefore, we can confirm that if the frog cells swell and burst while the human cells shrink means that the solution will be hypotonic for frog cells while for human cells the solution will be hypertonic.

To learn more about solution visit: https://brainly.com/question/1616939

#SPJ1

Answer: 50 Newtons

Explanation:

Due to newtons third law of motion for every action there is an equal and opposite reaction or in this case the equal and opposite amount of force applied so the same 50 N is applied on the car by the barrier

the answer is A: The number of atoms of that element in the molecule

Answer:

The number of atoms of that element in the molecule

Explanation:

The physical property that would make a mineral appropriate to use as an abrasive is hardness.

A mineral with a high level of hardness is able to resist being scratched or abraded, which makes it ideal for use in abrasive applications such as sandpaper. Some minerals that are commonly used as abrasives include diamond, corundum, and garnet. These minerals have a high level of hardness and are able to effectively remove material from a surface through the process of scratching or cutting. The choice of which mineral to use will depend on factors such as the type of material being worked on and the level of abrasiveness required.

To know more about abrasiveness, here

brainly.com/question/9624379

#SPJ4

Answer:

C

Explanation:

Hydrogen has one electron in its outermost shell, while fluorine has seven electron in its outermost shell, hence both hydrogen and fluorine needs a single electron to complete its outermost shell. That's why there is a single bond between hydrogen and fluorine.

Both hydrogen and fluorine share one electron with each other for the completion of their outermost shell. So the correct option is C.

In chemistry, the interatomic linkage that can be formed between atoms of the same or different elements and is due to the sharing of an electron pair between two atoms is called a covalent bond.

The kind of bonding is the result of an electrostatic force of attraction of their nuclei for the same electrons so that they can complete their octet. When the bonded atoms have lower total energy than that of widely separated atoms, a covalent bond is formed m

The inorganic substances hydrogen, nitrogen, chlorine, water, and ammonia (H2, N2, Cl2, H2O, NH3) and also all the organic compounds are the molecules that have covalent bonding. In the case of structural representations of molecules, this type of bonding is indicated by solid lines that connect pairs of atoms.

Therefore the correct option is C.

Read more about covalent bonds, here

https://brainly.com/question/19382448

#SPJ6

moles Cl⁻ : 0.00197

mass NaCl : 0.115

% purity : 95.83%

Molarity shows the number of moles of solute in every 1 liter of solute or mmol in each ml of solution

\(\large \boxed {\bold {M ~ = ~ \dfrac {n} {V}}}\)

Where

M = Molarity

n = Number of moles of solute

V = Volume of solution

So to find the number of moles can be expressed as

n = V x M

Reaction

AgNO₃ + NaCl ⇒ AgCl + NaNO₃

Molarity(concentration) of AgNO₃ = 0.1 mol/dm³(L) = 0.1 M

Volume=V of AgNO₃ = 19.7 ml(cm³)

so mol of AgNO₃ :

\(\tt mol=M\times V\\\\mol=0.1~mol/L\times 0.0197~L\\\\mol=0.00197\).

From the equation, mol ratio AgNO₃ : NaCl  = 1 ; 1, so mol NaCl= mol AgNO₃= 0.00197

NaCl⇒Na⁺+Cl⁻

mol Cl⁻ : mol NaCl = 1 : 1, mol Cl⁻ = 0.00197

\(\tt mass=mol\times MW\\\\mass= 0.00197\times 58.5=0.115~g\)

\(\tt \%purity=\dfrac{mass~NaCl}{mass~rock}\times 100\%\\\\\%purity=\dfrac{0.115}{0.12}\times 100\%=95.83\%\)

The correct term to fill in the blank is "preventive" use of a pesticide.

Applying a pre-emergent herbicide before weed seeds germinate is a preventive measure to stop weeds from growing, rather than trying to kill them after they have already established. This type of use can be more effective and environmentally friendly than reactive use of pesticides.
                                               Applying a pre-emergent herbicide is an example of preventive use of a pesticide.

                                       The correct term to fill in the blank is "preventive" use of a pesticide.

                            Applying a pre-emergent herbicide before weed seeds germinate is a preventive measure to stop weeds from growing, rather than trying to kill them after they have already established.

Learn more about pesticide

brainly.com/question/31600813

#SPJ11

Answer:

158.4 g

Explanation:

Find mass of CO2

= Number of moles x molar mass

= 3.6 mol x (12 + 16 + 16)

= 3.6 mol x 44

= 158.4 g

Acid precipitation, commonly known as acid rain or acid deposition, refers to rainfall or any form of precipitation that has a lower pH value than normal rainwater. Acid precipitation is primarily caused by air pollution, particularly the emission of sulfur dioxide (SO2) and nitrogen oxides (NOx) into the atmosphere from industrial processes, power generation, and transportation.

The primary harmful components of acid precipitation are sulfuric acid (H2SO4) and nitric acid (HNO3), which are formed when sulfur dioxide and nitrogen oxides react with water, oxygen, and other chemicals in the atmosphere. These acids dissolve in rainwater and other forms of precipitation, leading to a decrease in pH.

The harmful effects of acid precipitation on living things are primarily due to its acidic nature. Acidic water can have detrimental impacts on ecosystems, including:

1. Aquatic Life: Acid precipitation can acidify lakes, rivers, and streams, making the water more acidic than what many aquatic organisms can tolerate. It can harm fish, amphibians, and other aquatic organisms by disrupting their respiratory systems, impairing their reproduction, and damaging their habitat.

2. Forests and Plant Life: Acid rain can damage forests and vegetation. It leaches essential nutrients from the soil, such as calcium and magnesium, and makes them less available to plants. This can lead to nutrient deficiencies, stunted growth, and increased vulnerability to diseases and pests.

3. Soil and Microorganisms: Acid precipitation can also affect soil quality by altering its pH and nutrient availability. Acidic conditions can harm beneficial soil microorganisms that play a crucial role in nutrient cycling and maintaining soil health.

4. Buildings and Infrastructure: Acid rain can corrode and deteriorate buildings, statues, monuments, and other infrastructure made of materials such as limestone, marble, and metal. This can lead to structural damage and the loss of cultural and historical artifacts.

Overall, the harmful effects of acid precipitation on living things are primarily due to its ability to disrupt the delicate balance of ecosystems and affect the physiological processes of organisms. The impacts can be widespread and can have long-term consequences for biodiversity, ecosystem functioning, and human activities dependent on healthy ecosystems.

To know more about precipitation refer here

https://brainly.com/question/18109776#

#SPJ11

The following two statements are true about chemical kinetics.

1. Chemical  kinetics is the study of the rate of reactions.
2. A reaction rate can be defined as the decrease in the concentrations of reactants with time.

Chemical kinetics deals with the study of rate of chemical reactions. Rate of reaction is defined as  the measure of the change in concentration of the reactants or the change in concentration of the products per unit time.

The reaction rates decrease with time because reactant concentrations decrease as reactants are converted to products. The rate decreases as the reaction proceeds.

               A→B

A= reactant        rate of reaction =-\(\frac{d[A]}{dt}\)

B=product          rate of reaction=+\(\frac{d[B]}{dt}\)

This means that the concentration of 'A' decrease  with respect to time. It can also be noted by measuring the increase in the Concentration of B with the passage of time.

Negative sign indicates the conc. of reactants decreases with time

Positive sign indicates that conc. of product increases with the passage of time .Remember rate of reaction always positive.

To learn more about Chemical Kinetics, click here

brainly.com/question/28940590

#SPJ4

Answer: The standard potential is  -0.141 V

Explanation:

To calculate the Gibbs free energy for given value of equilibrium constant we use the relation:

\(\Delta G=-RTlnK\)

where,

= standard Gibbs free energy = ?

R = Gas constant = 8.314 J/Kmol

T = temperature = 298 K

K = equilibrium constant =

Putting values in above equation, we get:

\(\Delta G=40853J\)

Also \(\Delta G=-nFE^0\)

where n = no of electrons gained or lost = 3

F = Faradays constant = 96500 C

\(E^0\) = standard potential = ?

\(40853=3\times 96500\times E^0\)

\(E^0=-0.141V\)

Thus the standard potential is -0.141 V

Answer:

Over time, the solid particles will settle on whatever is outside."

Explanation:

Answer:

C

Explanation:

Answer:

6.7%

Explanation:

The formula of the compound is given as:

        C₆ H₁₂  O₆

The problem here is to find the percent composition of hydrogen.

First;

Find the molar mass of C₆ H₁₂  O₆  = 6(12) + 12(1) + 6(16)  = 180g/mol

Secondly;

Percentage composition of H = \(\frac{molar mass of H}{Molar mass of compound}\)  x 100

Percentage composition of H = \(\frac{12(1)}{180}\) x 100  = 6.7%

Answer:

The formula for salt is NaCl or Sodium chloride

Based on the periodic table, the element that is most reactive is Na.

The correct option is A.

Reactivity is a gauge of an element's propensity to create compounds with other elements. While certain elements require energy to react and are inert, others will do so simply and spontaneously. Reactivity is a gauge of an element's propensity to create compounds with other elements.

Reactive elements are the Group 1 and Group 2 metals. Also, the Group 17 and Group 16 non-metals are reactive non-metals.

Group 1 and Group 2 metals form positive ions easily by electron loss. Group 17 and Group 16 non-metals form negative ions by electron gain.

Learn more about reactive elements at: https://brainly.com/question/25380167

#SPJ1

The hybridization expect for Carbon in ethyne (C₂H₂) is sp atomic orbital hybridization.

In ethyne (C₂H₂), each carbon atom forms two sigma bonds and two pi bonds. The sigma bonds are formed by the overlap of hybrid orbitals, while the pi bonds are formed by the overlap of unhybridized p orbitals.

In its ground state, carbon has the electronic configuration 1s² 2s² 2p². To form bonds, carbon undergoes hybridization, where its valence electrons are rearranged into hybrid orbitals.

In ethyne, each carbon atom forms two sigma bonds: one sigma bond with another carbon atom and one sigma bond with a hydrogen atom. To accommodate these bonds, carbon undergoes sp hybridization, where one 2s orbital and one 2p orbital combine to form two sp hybrid orbitals.

The hybridization process involves the promotion of one electron from the 2s orbital to an empty 2p orbital. The resulting configuration for each carbon atom is two half-filled sp hybrid orbitals and two unhybridized 2p orbitals. The two sp hybrid orbitals point in opposite directions, creating a linear arrangement.

The two carbon atoms in ethyne then overlap their sp hybrid orbitals to form a sigma bond. Additionally, the unhybridized 2p orbitals on each carbon atom overlap sideways to form two pi bonds. These pi bonds involve the sideways overlap of parallel p orbitals, resulting in the formation of a pi bond above and below the molecular plane.

To know more about hybridization here

https://brainly.com/question/29020053

#SPJ4

The moles of gas that I have If I have an unknown quantity of gas at a pressure of 1.2 atm, a volume of 31 liters, and a temperature of 87 0 C is 1.26 moles.

To determine the mol of gas, we can use Mendeleev-equation Clapeyron's:

pV = nRT

Where:

n is the number of moles = ?

p is pressure = 1.2 atm

V is volume = 31 liters

T is temperature = 87°C ⇒ (273+87) = 360 K

R is the constant of all gases = 0.082 L.atm/mol.K

So, we can define the n number as:

n = pV/(RT)

n = (1.2) (31) / (0.082) (360) =

1.26 moles

Learn more about mole of gas here: https://brainly.com/question/14732897

#SPJ4

Answer:

6

Explanation:

number of protons equal number of electrons for the atom to be stable

The hydrogen bonding of water is one of the main property of water which makes it responsible for all the other physical and chemical properties.

Water molecules are polar in nature and they form hydrogen bonds. Hence, they have a high boiling point , high specific heat and density. Water can exhibit the properties of an acid, as well as a base (amphoteric character). The water molecules are constantly moving and the hydrogen bonds continuously breaks and forms again. These hydrogen bonds are strong, which is the reason for the unique properties of water.

To learn more about properties of water :

https://brainly.com/question/15395979

#SPJ4

All of the following are qualitative tests that are often used to identify unknown ionic compounds except titration.

Qualitative tests are conducted to determine the presence or absence of certain ions or compounds in a sample based on their characteristic reactions. Common qualitative tests include flame tests, precipitation reactions, color changes, and gas evolution tests.

Titration, on the other hand, is a quantitative technique used to determine the concentration of a specific substance in a solution by reacting it with a standardized solution of another substance. It is not typically used as a qualitative test for identifying unknown ionic compounds.

learn more about ionic compounds here

https://brainly.com/question/30420333

#SPJ11

It requires 7458 calories of heat to raise the temperature of 225 grams of water from 10.5°C to 43.7°C.

To calculate the amount of heat required to raise the temperature of a substance, we can use the formula Q = m * C * ΔT, where Q represents the heat, m is the mass of the substance, C is the specific heat capacity, and ΔT is the change in temperature.

In this case, we have 225 grams of water, a specific heat capacity of 1.00 cal/g°C, and a temperature change of 33.2°C (from 10.5°C to 43.7°C).

Plugging these values into the formula:

Q = 225 g * 1.00 cal/g°C * 33.2°C

Q = 7458 cal

Therefore, it requires 7458 calories of heat to raise the temperature of 225 grams of water from 10.5°C to 43.7°C.

This calculation is based on the specific heat capacity of water, which is the amount of heat energy required to raise the temperature of water by 1°C per gram. The specific heat capacity of water is relatively high compared to other substances, which is why it takes a significant amount of heat to raise its temperature.

It's important to note that the specific heat capacity of water can vary slightly with temperature, but for practical purposes, we often assume a constant value of 1.00 cal/g°C.

By using the given values and the formula for heat, we can accurately determine the amount of heat required for this specific temperature change in the given mass of water.

for more such questions on temperature

https://brainly.com/question/4735135

#SPJ11

Answer:

See attached image.

Explanation:

The explanations are on the attachment.  The numerical results are below.

1.  63g/7cm^3 = 9 g/cm^3

2.  The m or mm must be converted so that the units are the same.  1 m = 1000 mm.  I'll convert the meters to mm:  0.080 m = 80 mm.

480 mm^2/80 mm = 6 mm

3.  L times L makes no physical sense, unless this is a new Star Wars technique for making dark matter.  Entertaining, but useless.