Immediately after the golf ball is hit by the putter, the ball has 12 joules of mechanical energy. Seconds later, after the ball has rolled several meters through the grass, its mechanical energy has dropped to 4 joules due to friction with the grass and air.

The amount of mechanical energy lost by the golf ball is _______ the amount of heat energy gained by the ball, grass, and air molecules due to friction.
A.
equal to
B.
less than
C.
greater than
D.
unrelated to

Answer:

given that

....the mass of the metal is 20g(0.02kg)

....specific heat capacity(c) is 0.4J/g°C

....ΔT=??

heat(Q)=3.9KJ(3900J)

Q=mcΔT

ΔT= Q/mc

.....=3900÷(20g x 0.4J/g°C)

.....=487.5°C

Using the heat transfer formula Q = mcΔT, the change in temperature is calculated to be 487.5 °C. The metal absorbs 3.9 kJ of heat and has a specific heat capacity of 0.4 J/g°C.

To find the change in temperature for the 20 g piece of metal, we'll use the heat transfer formula:

Where:

Given:

Rearrange the formula to solve for ΔT:

Substitute the given values:

The change in temperature for the metal piece, given the provided data, is 487.5 °C.

Answer:

The answer to your question is pH = 6.3

Explanation:

Data

pH = ?

[H⁺] = 4.73 x 10⁻⁷ M

pH is the measure of the concentration of [H⁺]. pH measures the acidity of the solution. If the value of pH is between 0 and 6.9, the solution is an acid. If the pH is 7.0 the solution is neutral and if the pH is between 7.1 and 14, the solution is an alkali.

Formula

pH = -log[H⁺]

Substitution

pH = -log[4.73 x 10⁻⁷]

-Simplification

pH = - (-6.3)

-Result

pH = 6.3

Answer:

The answer to your question is  Volume 1 = 16.7 ml

Explanation:

Data

[HCl] 1 = 6.0 M

Volume 1 = ?

[HCl] 2 = 1.0 M

Volume 2 = 100 ml

Process

To solve this problem use the dilution formula

             [HCl] 1 x Volume 1 = [HCl] 2 x Volume 2

-Solve for Volume 1

             Volume 1 = [HCl] 2 x Volume 2 / [HCl] 1

-Substitution

             Volume 1 = 1 x 100 / 6

-Simplification

             Volume 1 = 100/6

-Result

             Volume 1 = 16.7 ml

Answer:

B

Explanation:

The leaves contain a pigment called chlorophyll, which colors the leaves green.

Answer: B

Explanation:

Chlorophyll can make food the plant can use from carbon dioxide, water, nutrients, and energy from sunlight.

Answer:

Magnesium, Carbon and Oxygen.

Explanation:

Answer:Magnesium carbonate is a magnesium salt with formula CMgO3. Its hydrated forms, particularly the di-, tri-, and tetrahydrates occur as minerals. It has a role as an antacid and a fertilizer. It is a magnesium salt, a carbonate salt and a one-carbon compound.

Explanation:

Answer:

Erythrocytes

Explanation:

Water passes through the Bowman's capsule into the glomerular filtrate and so do salts, glucose, urea, amino acids, and a majority of smaller proteins (molecular weight < 68,000). Erythrocytes or other blood cells do not enter the glomerular filtrate.

Answer: The volume of the gas in the squirrel now is 0.00532 L

Explanation:

To calculate the final volume of the system, we use the equation given by Charles' Law. This law states that volume of the gas is directly proportional to the temperature of the gas at constant pressure.

Mathematically,

[tex]\frac{V_1}{T_1}=\frac{V_2}{T_2}[/tex]

where,

[tex]V_1\text{ and }T_1[/tex] are the initial volume and temperature of the gas.

[tex]V_2\text{ and }T_2[/tex] are the final volume and temperature of the gas.

We are given:

[tex]V_1=0.005L\\T_1=308K\\V_2=?\\T_2=328K[/tex]

Putting values in above equation, we get:

[tex]\frac{0.005}{308}=\frac{V_2}{328}\\\\V_2=0.0053L[/tex]

Thus  the volume of the gas in the squirrel now is 0.00532 L

Answer:

m = 176.12 g

Explanation:

Let's write the reaction again:

Mg(s) + 2HCl(aq) --------> MgCl₂(aq) + H₂(g)

This reaction is a simple displacement reaction, in this case, the magnesium is displacing the atoms of hydrogens to form MgCl₂. 1 mole of Mg reacts with 2 moles of HCl. If the magnesium is the limiting reactant, we need to calculate the theorical yield of MgCl₂. The mole ratio between these two is 1:1 so, all we have to do is calculate the moles of magnesium and then the moles of MgCl₂:

moles Mg = 45 / 24.3 = 1.85 moles

As the mole ratio is 1:1 then:

moles Mg  = moles MgCl₂ = 1.85 moles

Now, we calculate the mass using the molecular mass:

m = 1.85 * 95.2

The theoretical yield of MgCl₂ obtained from the reaction is 176.3 g

We'll begin by calculating the mass of the Mg that reacted and the mass of MgCl₂ produced from the balanced equation.

Mg(s) + 2HCl(aq) —> MgCl₂(aq) + H₂(g)

Molar mass of Mg = 24.3 g/mol

Mass of Mg from the balanced equation = 1 × 24.3 = 24.3 g

Molar mass of MgCl₂ = 95.2 g/mol

Mass of MgCl₂ from the balanced equation = 1 × 95.2 = 95.2 g

SUMMARY:

From the balanced equation above,

24.3 g of Mg reacted to produce 95.2 g of MgCl₂

From the balanced equation above,

24.3 g of Mg reacted to produce 95.2 g of MgCl₂

Therefore,

45 g of Mg will react to produce = (45 × 95.2)/24.3 = 176.3 g of MgCl₂

Thus, the theoretical yield of MgCl₂ is 176.3 g

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Answer: The term used to describe the equilibrium constant for the autoionization of water is ION-PRODUCT CONSTANT of liquid water (Kw).

Explanation:

Autoionization of water can also be called self ionisation in which water molecules undergoes dehydronation reaction( which is reversible) to form hydroxide ion and hydronium ion. This helps to describe water as amphiprotic because it acts as an acid by donating a proton to a base to form the hydroxide ion or as a base by accepting a proton from an acid to form the hydronium ion.

Hence, the equilibrium constant for the autoionization of water is ION-PRODUCT CONSTANT of liquid water (Kw). At 25°C Kw = 1.01× 10-¹⁴.

Final answer:

The equilibrium constant for the autoionization of water is the ion-product constant for water, symbolized as Kw, with a value of 1.0 × 10-14 at 25 ℃.

Explanation:

The equilibrium constant for the autoionization of water is called the ion-product constant for water, and it is given the symbol Kw. The autoionization reaction can be represented as: H2O(l) = H+ (aq) + OH- (aq), and the respective Kw = [H+][OH-]. At 25 ℃, Kw has a value of 1.0 × 10-14. This reaction is an example of autoionization, where like molecules react to yield ions. The value of Kw is temperature-dependent and increases with rising temperatures. For instance, at 100 ℃, the value of Kw is about 5.6 × 10-13, which is significantly larger than at room temperature.

Answer:

BBr3

Explanation:

Attached image.

Boron tribromide:

BBr3

phosphorus trihydride:

PH3

Answer:

1.The diagram is attached

2.sodium alginate is a polymer which can be extracted from brown seaweed and is used for defloculating, gelling and thickening

Used also in dermatological preparation

Used in adhensive paste

Sodium alginate polymer is used in the food industry as a stabilizer for ice cream, yogurt, cream, and cheese.

A polymer is obtained by the agglomeration of small molecules called monomers. Monomers are the simple units from which polymers are formed the units that compose the sodium alginate polymer shown in the image attached to this answer are called monomers.

Sodium alginate is obtained from brown seaweed and is useful in the food industry as a stabilizer for ice cream, yogurt, cream, and cheese.

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Nitrogen gas has the chemical formula N2. One molecule of nitrogen gas is made up of two atoms of nitrogen.

The correct option is C.

Explanation:

Nitrogen gas has the chemical formula [tex]N_{2}[/tex], which means that two atoms of nitrogen element combined to form nitrogen gas.

The combination of two atoms of element nitrogen produce dinitrogen atom.

Dinitrogen is the nitrogen gas usually present in atmosphere of the earth in abundance.

2 atoms of nitrogen element

N + N = [tex]N_{2}[/tex]

the gas is colorless and odorless formed at standard condition of temperature and pressure. The two nitrogen atoms are tightly bonded with triple bonds in between the atoms.

One molecule of nitrogen gas is made up of  C. Two atoms of nitrogen.

Nitrogen gas, with the chemical formula N₂, consists of molecules that each contain two nitrogen atoms bonded together. The formula N₂ indicates that the gas is diatomic, meaning it is composed of pairs of nitrogen atoms. Each molecule of nitrogen gas has no oxygen atoms and consists solely of nitrogen.

The molecular formula N₂ reflects the fact that nitrogen naturally forms a diatomic molecule in its elemental state. This diatomic nature is due to the strong triple bond between the two nitrogen atoms, which is the most stable configuration for nitrogen in its gaseous form.

Answer:

SbF5

Mass ratio = 1.28 : 1

And atomic ratio = 1 : 5

Answer:

6.37 L

Explanation:

- Used combined gas law. Get rid of temperature since it is constant. (You could also keep it and get the same answer, but it is another step)

- Change C to K

- Change torr to atm

- Hope this helps! I would be glad to give you a step by step explanation. Please let me know if you want help on how to do these types of problems.

The nitrogen has one unpaired electron in its orbitals.

The number of electrons in nitrogen (N) is 7 because its atomic number is 7. To find out how many single electrons there are in the orbitals of nitrogen, we have to write down the way its electrons are arranged.

The electron configuration of nitrogen is: 1s² 2s² 2p³

In the 2p orbital, there are three electrons (2p³). Since each orbital can hold a maximum of two electrons, we know that two electrons will be paired in one of the 2p orbitals, and one electron will be unpaired in another 2p orbital.

Therefore, nitrogen has one unpaired electron in its orbitals.

Read more about  nitrogen here:

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Answer:  0.0400 M

Explanation:

[tex]HCl+NaOH\rightarrow NaCl+H_2O[/tex]

To calculate the volume of acid, we use the equation given by neutralization reaction:

[tex]n_1M_1V_1=n_2M_2V_2[/tex]

where,

[tex]n_1,M_1\text{ and }V_1[/tex] are the n-factor, molarity and volume of acid which is [tex]H_2SO_4[/tex]

[tex]n_2,M_2\text{ and }V_2[/tex] are the n-factor, molarity and volume of base which is NaOH.

We are given:

[tex]n_1=1\\M_1=?\\V_1=150mL\\n_2=1\\M_2=0.100M\\V_2=60.0mL[/tex]

Putting values in above equation, we get:

[tex]1\times M_1\times 150=1\times 0.100\times 60.0\\\\M_1=0.0400M[/tex]

Thus the original concentration of the HCl solution is 0.0400 M

CH₄ is the molecular formula for methane. The correct option is (C) molecular.

To answer the question, let's first understand what the different terms mean:

This means that CH₄ indicates the composition of a methane molecule, showing it consists of one carbon atom and four hydrogen atoms. It does not show how the atoms are bonded or arranged.

Answer:

This is the amount of heat required to change solid ice into liquid water.

Explanation:

-Latent heat of fusion or enthalpy of fusion is defined as the amount of heat required by a substance to change its status from solid to liquid

-Hence, 3.4 X 105 J/Kg is the amount of heat required to change solid ice into liquid water.

Answer:

Primary producers that create energy from oxidizing chemicals. (Ans. B).

Explanation:

Hydrothermal vents, submarine hot springs form as a result of volcanic activity on the ocean floor. Cracks occur in the Earth's crust, water seeps dissolving minerals and evolves superheated from.

Through the process of chemosynthesis, some specialized species such as crabs, shrimp, slugs, etc generate energy from the H2S (hydrogen sulfide) which is present in the mineral abundant water splashing out of the vents. These bacteria are able to support ecosystems as a primary producer form the bottom level of the food chain in which all other animals are dependent.

Final answer:

Ocean ecosystems around hydrothermal vents support thriving communities of living things, including primary consumers that create energy from oxidizing chemicals.

Explanation:

The ocean ecosystems around hydrothermal vents, submarine hot springs, and methane cold seeps are able to support thriving communities of living things. These ecosystems contain chemoautotrophic bacteria that synthesize complex organic molecules, such as glucose, using energy from inorganic compounds like hydrogen sulfide (H₂S) released from the vents. The rest of the ecosystem, including primary consumers like swimming shrimp, squat lobsters, and vent mussels, obtain energy from these bacteria, making option D. primary consumers that create energy from oxidizing chemicals the correct answer.

Answer:

Rock A because after physical weather and chemical weathering it more likely for Rock A to experience more chemical weathering.

Explanation: Weathering: This is a geological term used to describe the various processes and Activities involved in the breaking down of rocks either through physical,mechanical,chemical etc actions into smaller particles.

ROCK A WILL HAVE MORE CHEMICAL WEATHERING BECAUSE THE PHYSICAL WEATHERING MUST HAVE BROKEN DOWN THE PARTICLES FOR EASY WATER AND OTHER SUBSTANCE NEEDED FOR EASIER CHEMICAL REACTION OR WEATHERING.

The theoretical mass of ammonia is 56.6 grams when reaction is begun with 10.00 grams of each reactant.

Explanation:

Data given:

mass of reactants = 10 gram

The reactants are hydrogen and nitrogen gas.

Theoretical mass of ammonia =?

balanced chemical reaction is :

3 [tex]H_{2}[/tex] + [tex]N_{2}[/tex] ⇒ 2 N[tex]H_{3}[/tex]

Atomic mass of hydrogen gas = 2 grams/mole

atomic mass of nitrogen gas = 28 grams/mole

number of moles of each reactant is determined:

number of moles  = [tex]\frac{mass}{atomic mass of 1 mole}[/tex]

putting the values for hydrogen gas

number of moles = [tex]\frac{10}{2}[/tex]

number of moles = 5

number of moles of nitrogen gas = [tex]\frac{10}{28}[/tex]

                                                       = 0.35 moles

from the balanced equation,

3 moles of hydrogen gas reacted to give 2 moles of ammonia

5 moles of hydrogen will give x moles

[tex]\frac{2}{3}[/tex] = [tex]\frac{x}{5}[/tex]

3x =10

x = 3.33 moles

mass of ammonia produced = number of moles x atomic mass

                                               = 3.33 x 17

                                                 = 56.61 grams of ammonia produced from hydrogen

For nitrogen gas,

1 mole nitrogen gas reacted to give 2 moles of ammonia gas

0.35 moles will give x moles

[tex]\frac{2}{1} =\frac{x}{0.35}[/tex]

x = 0.7 moles of ammonia formed

mass = number of moles x atomic mass

         = 0.7 x 17

           = 11.9 grams

Thus the limiting reagent is hydrogen gas in the reaction.

The mass from limiting reagent is called theoretical yield = 56.61 grams

Question:

The information given is:

Trial #      Tiwater     T f           ΔT        Masswater  (m)

       #1:     21.2         10.8        10.8       24.990

       #2:    20.8        9.50       9.5         25.000

       #3:    20.9        9.20       9.2         25.010

Answer:

The heat of the reaction is -5985 J

Explanation:

The heat absorbed by the water is given by

ΔQ = m·c·ΔT  

From which

∑ (ΔT·m)/3 = 278.34 kg·°C

ΔQ = c×∑ (ΔT·m)/3 = 4.184 J/g·°C×278.34 kg·°C = 1164.565 J

ΔQ Calorimter = Specific heat capacity of calorimeter, [tex]c_{calorimeter}[/tex] × ΔT[tex]_{average}[/tex]

Where the [tex]c_{calorimeter}[/tex] = 443 J/°C for example, we have

ΔQ Calorimter = 443×11.133 = 4820.733 J

From which the heat of reaction is then

[tex]\Delta Q_{reaction} = -(\Delta Q_{water} + \Delta Q_{calorimter})[/tex]

[tex]\Delta Q_{reaction} = -5985.298 \, J[/tex]

Using 4 digits, we get

[tex]\Delta Q_{reaction} \approx -5985 \, J[/tex].

Answer:

Carbohydrates are metabolized by three pathways which are glycolytic pathway, oxidation of fatty acids, and the citric acid cycle. The NADH and FADH2 formed in these pathways are energy rich molecules because each contains a pair of electrons having a high transfer potential. When these electrons are used to reduced molecular oxygen to water, a large amount of free energy is liberated which is used to generate ATP. This process is known as oxidative phosphorylation.

Explanation:

There are two type of reaction that takes place in oxidative phosphorylation which are oxidation and reduction.

First, carbon fuels are oxidized in the citric acid to yield electrons with high transfer potential. Then, this electron motives force is converted into a proton motive force and this proton motive force is finally converted into phoshoryl transfer potential. The final phase of oxidative phosphorylation is carried out by ATP synthase, an ATP synthesizing assembly that is driven by the flow of protons back into the mitochondrial matrix.

Answer:

Carbohydrates is a macromolecules which is broken down into simpler substances like glucose which is used in the generation of energy in the process of cellular respiration.

Explanation:

Glycolysis is the first phase of respiration in which glucose molecule is broken down forming two molecules of pyruvate, two molecules of ATP, two molecules of NADH and two molecules of water. The second phase is Krebs cycle in which oxidation of acetyl-CoA occurs and energy is released in the form 2 ATP and carbondioxide. Electron transport chain is a third phase in which NADH, FADH and oxygen are the reactants producing 34 ATP and water. 34 ATP includes ATP of glycolysis and Krebs cycle.

Answer: i think the answer is

C. Chemists have learned how dangerous chemicals can be

Explanation:

Answer:

Chemists have improved our quality of life

Explanation:

Apex

Answer:

She has to mix 0.0550 moles of NaOH in a 550 mL solution to make a 0.100 M solution

Explanation:

Step 1: Data given

Concentration of the solution = 0.100 M

Number of moles NaOH = 0.0550 moles

Step 2: Calculate the volume of solution she needs

Concentration NaOH solution = number of moles NaOH / volume solution

Volume of the solution = Number of moles NaOH / Concentration NaOH solution

Volume of the solution = 0.0550 moles NaOH / 0.100 mol /L

Volume of the solution needed = 0.55 L

Volume of the solution needed = 550 mL

She has to mix 0.0550 moles of NaOH in a 550 mL solution to make a 0.100 M solution

Answer:

0.550

Explanation:

Answer:

The reaction will shift rightwards favoring the product.

Explanation:

Hello,

In this case, considering the chemical reaction to be:

[tex]H_2(g)+I_2(g)\rightleftharpoons 2HI(g) ;\Delta H^o rxn=-9.4kJ/mol;Kc=49[/tex]

We notice that the sign of the change in the enthalpy of the reaction is negative, therefore this an exothermic chemical reaction in which the heat is a product as the reaction vessel heats up as the reaction undergoes. In such a way, by decreasing the temperature we are removing heat and by means of the Le Chatelier's principle, when removing a product, the reaction will shift rightwards favoring the product, HI.

Best regards.

Answer:

the balance will shift to the right, favoring the products. More HI will be formed.

Explanation:

Step 1: Data given

H2(g), I2(g), and HI(g) are at equilibrium at a different temperature in a different vessel.

Step 2: The balanced equation

H2(g) + I2(g) ⇆ 2HI(g)

Step 3:

If the temperature is increased, the system will release less heat as reaction.

Since formation of HI is exothermic

When the temperature drops, the system will produce more heat. With the result, the balance will shift to the right, favoring the products. More HI will be formed.

Answer:

CO2 consists of individual molecules with one central carbon atom double bonded to two oxygen atoms. Silicon does not form double bonds with oxygen. CO2 is gas but SiO2 is a solid because SiO2 has a giant molecular structure. CO2 has a simple molecular structure, and because of this, CO2 is gas but SiO2 is solid at room temperature.

Answer:

Explanation:

Because of their structure . Silica has a  chain structure with e one silicon atom bonded to 4 oxygen atoms in the lattice. The structure is a long chain of tightly held atoms and this forms a solid.

The carbon dioxide molecule however as a linear structure and each  oxygen atom is bonded by double bonds. These double bonds are not as strong as the Si - O bonds in silica so will not form a chain structure.

Answer:

101.3 kPa / 1 atm (first choice)

Explanation:

1 atm = 101.3 kPa, so to convert atm to kPa, just multiply the given value by 101.3 kPa.

Hope this helps

Answer:

[tex]P_2=135.73psi[/tex]

Explanation:

Hello,

In this case we use the Boyle's law which allows us to understand the volume-pressure behavior as an inversely proportional relationship:

[tex]V_1P_1=V_2P_2[/tex]

Whereas we solve for [tex]P_2[/tex] as the required final pressure:

[tex]P_2=\frac{V_1P_1}{V_2} =\frac{27.0L*14.7psi}{3.00L}\\ \\P_2=135.73psi[/tex]

Best regards.

Answer is 0.62

Explanation: Since the worker works at least 8 hours minimum, therefore total maximum length of time is 16 hours.Thus, the probability of at least 8 hours is. 16/24=2/3=0.62

Answer:

Answer is 0.62

Explanation:

i