(8.6B) Speed, Velocity, and Acceleration:Question 1 What two factors are needed in order to compute the speed of a car? Select one:
A speed and acceleration
B:acceleration and time
c:speed and distance
D:distance and time​

Unlike protons and neutrons, which are housed inside the atom's nucleus at its center, electrons are found outside the atom.

An atom can have a label in addition to a symbol or atomic number. The label is formatted as "(text)" (without the quotation marks), which means "text, closed curved bracket, open curved bracket." If an isotopic mass is present, it should come after the chemical symbol, followed by the label.

The element is represented by the letter(s) in the centre. The atomic number, which indicates the quantity of protons, is the number in the bottom left corner.

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The correct answer is B) zymomonas. Ethanolic fermentation, which is the process of converting sugars into ethanol (alcohol) and carbon dioxide by yeast, is commonly used in the production of beverages like beer, wine, and pulque.

While there are various microorganisms that can carry out fermentation, yeast is the primary organism involved in ethanolic fermentation.

Zymomonas is a type of bacteria that is known for its ability to perform ethanolic fermentation. It can efficiently convert sugars into ethanol and carbon dioxide, making it suitable for industrial applications such as the production of alcoholic beverages.

Clostridium, Leuconostoc, Lactobacillus, and Propionibacterium are other types of microorganisms, but they are not primarily involved in ethanolic fermentation. They may have different metabolic pathways or be associated with other fermentation processes, but they are not the main organisms responsible for the production of ethanol in the context of beverage production.

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Answer: 20 g

Explanation: heat received Q = m c dT

Q= 50J , dT= 25 C anc c= 0.10 J / g C

And m = Q / c dT

The mass of the iron sample that received the heat is determined as 20 g.

The mass of the iron sample is calculated as follows;

Q = mcΔT

where;

m = Q/cΔT

m = (50) / (0.1 x 25)

m = 20 g

Thus, the mass of the iron sample that received the heat is determined as 20 g.

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Answer:

The protons determine the name of an element and also atomic number because its the same as protons.

Answer:

Explanation:

2S       +       3O₂       =       2SO₃

2moles      3 moles

2 moles of S react with 3 moles of O₂

5 moles of S will react with 3 x 5 / 2 moles of O₂

= 7.5 moles of O₂ .

O₂ remaining unreacted = 10 - 7.5 = 2.5 moles .

All the moles of S will exhausted in the reaction and 2.5 moles of oxygen will be left .  

The postulates in John Dalton's atomic theory later became robust knowledge is various scientists found that sometimes a fraction of an atom can take part in a chemical reaction. Therefore, option D is correct.

In the first section of his thesis, he claims that all matter is composed of indivisible atoms. According to the second component of the theory, the mass and characteristics of every atom in a specific element are the same. Compounds, according to the third section, are combinations of two or more different kinds of atoms.

A chemical combination theory that was first put forth by John Dalton in 1803. The following postulates are involved: (1) Small, indivisible particles make up elements (atoms). (2) Atoms of the same element are all identical; atoms of other elements are of different types. (3) It is impossible to produce or destroy an atom.

Thus, option D is correct.

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A lubricant must keep its properties in the presence of additives and other items. Lubricating oil colours are more of a test for a grade or brand of oil's consistency than they are for its attributes. Thus, option B is correct.

There are four different kinds of liquid lubricants. Mineral oil a. It is a material made from petroleum. These oils are stable at high temperatures because they have a high paraffine and naphthanic content.

Examples include steam cylinder oil, wire rope oil, refrigeration grade oil, gear oil, machine or engine oil, and circulating oil.

Therefore, they should be used at lower cutting speeds than other types of cutting fluids. They make cutting surfaces smoother.

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Answer:

b. Malic Acid

Explanation:

Malic (organic) Acid is found in apple.

GL

Answer:

Single replacement

Explanation: Al is replacing Cu

Yellow paint has 0.511 % PbCrO4 by mass

Mass of PbCrO4 in 1 kg of paint = (0.511 / 100) * 1 kg = 0.00511 kg = 5.11 g

Moles of PbCrO4 = 5.11 g/ 323.19 g/mol

                           = 0.0158 moles

Moles of K2CrO4 also = 0.0158 moles

Moles of FeCr2O4 = 0.0158 moles K2CrO4 * (4 mole FeCr2O4 / 8 moles K2CrO4)

                            = 0.0079 moles

Mass of FeCr2O4 (chromite) = 0.0079 moles * 223.83 g/mol

                                            = 1.77 g

Paints are divided into two types: oil-based paints and water-based paints. Oil paints are usually used as a primer, undercoat, and topcoat. In the past, we relied heavily on oil-based paints for surface durability and longevity, but today water-based paints are on par. It is used for prolongation and acts as a barrier against environmental influences. Paint consists of pigments, solvents, resins, and various additives. Pigments give the paint its color. Solvents make application easier. The resin helps dry. Additives range from fillers to antifungals. There are hundreds of different natural and synthetic pigments.

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Fertilizers add nitrous oxide (N2O) greenhouse gas to the environment.

Fertilizers are compounds applied to plants to stimulate growth by providing them with essential nutrients. They can be classified into two types: inorganic fertilizers, which are composed of mined minerals and processed chemicals, and organic fertilizers, which are derived from organic sources such as animal manure and compost.

Nitrogen is a vital nutrient for plants, and it is often added to soil in the form of fertilizers. However, when nitrogen fertilizers break down in the soil, they can release nitrous oxide (N2O) into the atmosphere. Nitrous oxide is a potent greenhouse gas, meaning it contributes to the greenhouse effect and global warming. In fact, its global warming potential is estimated to be around 300 times greater than carbon dioxide (CO2).

Nitrous oxide (N2O) is one of the six gases identified as key contributors to global climate change. Agriculture is the primary source of N2O emissions, accounting for approximately two-thirds of all N2O emissions in the United States. This is due to the significant use of nitrogen-based fertilizers in agricultural practices.

In conclusion, the use of fertilizers, both inorganic and organic, can contribute to the release of nitrous oxide (N2O) greenhouse gas into the environment. Nitrous oxide is a potent greenhouse gas with a much higher global warming potential than carbon dioxide. As agriculture is the primary source of N2O emissions, it is crucial to implement sustainable and efficient farming practices to minimize the environmental impact of fertilizers and reduce greenhouse gas emissions.

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Answer: They combined to form molecules.

Explanation:

That statement that describes atoms in Group 18(8A) are inert is "they have a full valence shell."

A substance that is not chemically reactive is referred to as chemically inert.

When elements react, their atoms lose, gain, or share electrons to complete their outer shells. Noble gas atoms already have entire outer shells, therefore they don't inclined to lose, gain, or share electrons. This is why noble gases are chemically inert and do not participate in reactions.

When atoms bond, they try to form an octet by transferring or sharing valence electrons in the case of ionic bonds and covalent bonds, respectively. There is no incentive for group 18 atoms to bond because they already have an octet of valence electrons.

As a result, the noble gases belong to the periodic table's group 18. They are nonmetal elements with a full shell of valence electrons that are chemically inert, colourless, and odourless. We can see that helium (atomic number 2) has a full shell of two s electrons if we look at the electron configurations.

Hence the correct option is D.

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Answer: D

Explanation:

Answer:

1. [H⁺] = 1.58×10¯¹⁰ mol/L

2. pH = 9.8

3. pOH = 4.2

Explanation:

We'll begin by calculating the pOH of the solution. This can be obtained as follow:

Concentration of Hydroxide ion [OH¯] = 5.8×10¯⁵ mol/L

pOH =?

pOH = –Log [OH¯]

pOH = –Log 5.8×10¯⁵

pOH = 4.2

Next, we shall determine the pH of the solution. This can be obtained as follow:

pOH = 4.2

pH =?

pH + pOH = 14

pH + 4.2 = 14

Collect like terms

pH = 14 – 4.2

pH = 9.8

Finally, we shall determine the concentration of Hydrogen ion [H⁺] in the solution. This can be obtained as follow:

pH = 9.8

Concentration of Hydrogen ion [H⁺] =?

pH = –Log [H⁺]

9.8 = –Log [H⁺]

Multiply through by –1

–9.8 = Log [H⁺]

Take the anti log of –9.8

[H⁺] = antilog (–9.8)

[H⁺] = 1.58×10¯¹⁰ mol/L

SUMMARY:

1. [H⁺] = 1.58×10¯¹⁰ mol/L

2. pH = 9.8

3. pOH = 4.2

Answer:

Carbon

Explanation:

Steel is an alloy of iron and carbon. Stainless steels are steels containing at least 10.5% chromium, less than 1.2% carbon and other alloying elements

Answer: B

Explanation:Steel is an alloy of iron and carbon.

Explanation:

Q = 373J

∆∅ = 25°C

m = 312g

c = x

Q = mc∆∅

373 = 312(x)(25)

373 = 7800x

x = 373/7800

x = 0.0478J/(g°C)

The specific heat of the substance if 373 J is required to raise teh temperature of a 312 gram sample by 25°C is 0.0478 J/g

The amount of energy needed to raise the temperature of one gram of a substance by one degree Celsius.

By the formula of specific heat

Q = mc∆∅

Q = 373J

m = 312g

∆∅ = 25° C

Putting the values in the equation

\(373 = 312\times c \times (25)\\\\373 = 7800c\\c= \dfrac{373}{7800} = 0.0478J/(g \circ C)\)

Thus, the specific heat of the substance if 373 J is required to raise teh temperature of a 312 gram sample by 25°C is 0.0478 J/g

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This problem is asking for the reason behind the nonexistence of elementary substances with ionic bonds. First of all, it is necessary to bear to mind that the definition of the type of bond in a compound depends on the difference electronegativity that is present between two of the atoms composing it.

For instance, in binary salts, such as KCl, NaCl, KBr and so on, we are able to know these are all ionic because they are composed by a metal and a nonmetal, which have the smallest and largest electronegativities, so that the difference electronegativity is large enough to produce an ionic bond.

In contrast, elementary susbtances, such as liquid bromine (Br2) and gases such as H2, N2, Cl2, F2 and O2, since they are all nonmetals and the same type, the electronegativity difference will be 0 and therefore, they will not be ionic but covalent.

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Chemicals are not supposed to be poured down the drain.

Chemicals should not be poured down the drain. This can cause harm to the plumbing system, sewage treatment plants, and the environment. Dispose of household chemicals properly by taking them to a designated recycling center or household hazardous waste collection event.

Thus the action that have been undertaken by Thomas and Trenton  is quite wrong since the chemicals that they have poured down the drain could lead to an environmental hazard.

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Answer:glucose

Explanation:

Energy released during the breakdown of glucose and other organic fuel molecules from carbohydrates, fats, and proteins during glycolysis is captured and stored in ATP.

It is dangerous to mix chlorine and vinegar together as cleaner because that would produce a large amount of chlorine gas by shifting the equilibrium to the left.

As per the Le Chatelier's principle, if the equilibrium of a reaction is disturbed by changing any property of the reaction, then the reaction will automatically shift in that direction which would compensate the effect of the change in property, in order to establish the equilibrium again.

In the reaction,

Cl₂(g) + 2NaOH(aq) ⇄ NaOCl(aq) + NaCl(aq) + H₂O(l)

Currently this reaction is in equilibrium, but if the concentration of any of the product is added in the system, the equilibrium will be disturbed, to established the equilibrium again, the the reaction will shift towards left and more and more amount of reactant will be formed, and more and more chlorine gas will be formed which is toxic.

Now to the doubt asked in the question,

If vinegar is added to the system, the amount of NaOH will be consumed which will decrease the concentration of NaOH and the concertation of water will increase because of acid water neutralization reaction.

The increased amount of water and the decreased amount of NaOH will heavily shift the equilibrium to the Left which is again producing chlorine gas which is not good.

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The specific heat capacity of the ethanol, given that the ethanol absorbs 43338 joules of heat is 2.44 J/gK

We shall begin our calculation by listing out the given parameters from the question. Details below:

The specific heat capacity of the ethanol can be obtain as follow:

Q = MCΔT

43338 = 545.5 × C × 32.56

43338 = 17761.48 × C

Divide both sides by 17761.48

C = 43338 / 17761.48

C = 2.44 J/gK

Thus, we can conclude that the specific heat capacity of ethanol is 2.44 J/gK

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Answer:

oxygen (O)

Explanation:

Answer:

A) oxygen (O)

Explanation:

edge 2023

the original pressure of the gas was 1.728 atm.

To solve this problem, we can use the ideal gas law, which relates the pressure, volume, number of moles, and temperature of a gas:

PV = nRT

where P is the pressure, V is the volume, n is the number of moles, R is the universal gas constant, and T is the temperature.

Assuming that the number of moles and the temperature of the gas remain constant, we can write:

P1V1 = P2V2

where P1 and V1 are the initial pressure and volume of the gas, and P2 and V2 are the final pressure and volume.

Substituting the given values, we get:

P1 x 5.00 L = 0.720 atm x 12.0 L

Solving for P1, we get:

P1 = (0.720 atm x 12.0 L) / 5.00 L

P1 = 1.728 atm

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Answer:

i think its the first one

Explanation:

im new to chemistry as while but im not completely sure.

The specific heat of the metal is approximately equal to 3.77 J/g°C.

To calculate the specific heat of the metal, we can use the equation:

q = m * c * ΔT

where:

q is the heat transferred,

m is the mass of the substance (in this case, water),

c is the specific heat capacity of the substance (in this case, water),

ΔT is the change in temperature.

Given the data:

Mass of the metal (m₁) = 50.0 g

Mass of water (m₂) = 100 g

Temperature change of water (ΔT) = 23.5°C

Assuming there is no heat loss to the surroundings, the heat gained by the water is equal to the heat lost by the metal. Therefore, we can write:

m₁ * c₁ * ΔT = m₂ * c₂ * ΔT

Rearranging the equation to solve for the specific heat of the metal (c₁), we have:

c₁ = (m₂ * c₂ * ΔT) / (m₁ * ΔT)

Substituting the given values, we get:

c₁ = (100 g * 4.18 J/g°C * 23.5°C) / (50.0 g * 23.5°C)

Evaluating the expression, the metal's specific heat is about equal to3.77 J/g°C.

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The unknown metal X is iron metal as it reacts with copper sulfate solution but does not react with magnesium chloride.

Some metals are very reactive while other metals are less reactive or unreactive. When a more reactive metal is added to the solution of a less reactive metal, then the more reactive displaces the less reactive metal from its solution is known as a displacement reaction.

The general form of a single displacement reaction can be represented as:

\(A + BC \longrightarrow B + AC\)

When iron is placed in copper sulfate (CuSO₄) solution then the blue color of the copper sulfate solution turns a red-brown coating of copper metal deposited on the iron.

\(CuSO_4 (aq)+ Fe (s)\longrightarrow FeSO_4 (aq) +Cu(s)\)

Iron lies above the electrochemical series and is more reactive than copper. So it reacts with copper sulfate but does not give any reaction with magnesium chloride.

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Answer:

Try true

Explanation:

But note I'm not sure

Explanation:

it is true

hope I helped you!! :))

Answer:

e

Explanation:

it's in the index fossil range

Answer:

Explanation:

In marine strata, index fossils that are commonly used include the single-celled Protista with hard body parts and larger forms such as ammonoids. In terrestrial sediments of the Cenozoic Era, which began about 65.5 million years ago, mammals are widely used to date deposits.