In a given substance, as the temperature of a substance increases, the volume of that substance
A. decreases
B. fluctuates
C. increases
D. is not affected

It decreases right?

Dalton's atomic theory was not the first to propose tiny indestructible pieces of matter, and it was not based on experimental evidence from leading scientists.

The false statement about Dalton's atomic theory is number 3. While Dalton's theory was significant in proposing that matter consists of tiny indestructible pieces, it was not the first theory to do so. The idea of atoms had been previously suggested by the Greek philosopher Democritus. Dalton's theory also did not incorporate experimental evidence from leading scientists of his time, so statement 4 is also false. Despite these inaccuracies, the other two statements are true: scientists have indeed improved parts of Dalton's atomic theory, and some parts of the theory are no longer accepted as correct.

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Petroleum is a primary source of hydrocarbons. Therefore, the correct option is option C among all the given option.

Only hydrogen and carbon atoms make up the organic molecules known as hydrocarbons. They are the basic elements that make up fossil fuels including coal, oil, and natural gas. Hydrocarbons have a wide range of uses and are essential to many sectors of the economy, including manufacturing, energy, transportation, and agriculture. The energy component of hydrocarbons is one of its primary uses. Hydrocarbons are dependable sources of energy since they burn with a lot of heat released. Petroleum is a primary source of hydrocarbons.

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Answer: Option (a) is the correct answer.

Explanation:

Sodium has atomic number 11 ans its electronic configuration is [tex]1s^{2}2s^{2}2p^{6}3s^{1}[/tex].

Sodium has one extra electron. Therefore , in order to gain stability sodium readily loses an electron to an electronegative atom. Hence, it becomes stable.

Thus, we can conclude that out of the given options, Na is the most reactive metal.

Consider the balanced equation below.

4NH3 + 3O2  2N2 + 6H2O  

What is the mole ratio of NH3 to N2?    4:2

Answer:

Mole ratio NH3: N2 = 4:2

Explanation:

The given equation depicts the reaction between ammonia (NH3) and oxygen (O2) to form nitrogen (N2) and water (H2O). The balanced equation is:

[tex]4NH_{3} +3 O_{2} \rightarrow 2 N_{2}+ 6H2O[\tex]

Based on the reaction stoichiometry:

4 moles of NH3 combines with 3 moles of O2 to form 2 moles of N2 and 6 moles of H2O

Thus the mole ratio of NH3: N2 = 4:2 (or 2:1)

Answer: 25.3

Explanation:

The question aks to convert 19 quibs, which is the amount of skvarnick that you obtained, to sleps.

Since, you are given the equivalence between sleps and quibs, you can build your own conversion factor, which is how the sciientific calculations are made:

Now, you can multiply 19 quibs by the conversion factor:

The quibs units cancel out since they are in the numerator and denominator, leaving only sleps.

               Option-A (BaTiSi₃O₉)

Step 1: Calculate Moles of each Element;

                      Moles of Ba  =  %Ba ÷ At.Mass of Ba

                      Moles of Ba  = 33.21 ÷ 137.33

                      Moles of Ba  =  0.241 mol

                      Moles of Ti  =  %Ti ÷ At.Mass of Ti

                      Moles of Ti  = 11.58 ÷ 47.88

                      Moles of Ti  =   0.241 mol

                      Moles of Si  =  %Si ÷ At.Mass of Si

                      Moles of Si  = 20.38 ÷ 28.09

                      Moles of Si  =  0.725 mol

                      Moles of O  =  %O ÷ At.Mass of O

                      Moles of O  = 34.83 ÷ 16.0

                      Moles of O  =  2.176 mol

Step 2: Find out mole ratio and simplify it;

       Ba                            Ti                                Si                          O

     0.241                       0.241                          0.725                    2.176

 0.241/0.241           0.241/0.241                0.725/0.241            2.176/0.241

         1                             1                                    3                           9 

Hence,  Empirical Formula  =  BaTiSi₃O₉

Step 3: Calculating Molecular Formula:

Molecular formula is calculated by using following formula,

                    Molecular Formula  =  n × Empirical Formula  ---- (1)

Also, n is given as,

                     n  =  Molecular Weight / Empirical Formula Weight

Molecular Weight  =  413.44 g.mol⁻¹

Empirical Formula Weight  =  137.33 (Ba) + 47.88(Ti) + 28.09 (Si₃) + 16 (O₉)  =  413.48 g.mol⁻¹

So,

                     n  =  413.44 g.mol⁻¹ ÷ 413.48 g.mol⁻¹

                     n  =  1

Putting Empirical Formula and value of "n" in equation 1,

                    Molecular Formula  = 1 × BaTiSi₃O₉

                   Molecular Formula  =  BaTiSi₃O₉

Answer:

A.  

BaTiSi3O9

Explanation:

the molecular formula for the mineral benitoite is  BaTiSi3O9

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Kinetic energy is the energy that an object possesses due to its motion. Examples of objects with kinetic energy include a moving car, a flying bird, and a rolling ball. The kinetic energy of these objects depends on their mass and speed.

In the realm of physics, kinetic energy refers to the energy that an object possesses due to its motion. Here are three examples of objects that exhibit kinetic energy:

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Hey There!:

Total number of moles of gases:

0.150 + 0.419 + 0.211 => 0.780 moles

Volume = 0.250 L

Temperature = 298 K

Using the ideal gas law:

p*V =  n*R*T , putting all the values we get :

p * 0.250 = 0.780 * 0.0821* 298

p* 0.250 = 19.083

p = 19.083 / 0.250

p = 76.3 atm

Hope That helps!

To find the total pressure of a gas mixture, calculate the individual pressures of each gas using the Ideal Gas Law and add them to get the total pressure according to Dalton's Law of partial pressures. The pressure of each component is calculated using its respective moles, the gas constant, temperature and volume, and adding up these pressures gives the total pressure of the mixture.

To calculate the total pressure of a gas mixture, we use the Ideal Gas Law PV=nRT, where P stands for pressure, V for volume, n for the number of moles, R is the universal gas constant and T is the temperature. In this context, it comes in hand with Dalton's Law of partial pressures, which states that in a mixture of non-reacting gases, the total pressure exerted is equal to the sum of the partial pressures of the individual gases.

Firstly, calculate the individual pressures of each gas in the mixture using the Ideal Gas Law, where for each gas, the number of moles, volume and temperature are known. Once the individual pressures are calculated, you add them together to get the total pressure of the gas mixture.

Therefore you would find that:

Sum these up to determine the total pressure of the mixture.

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The best method to separate a mixture of water and pentane is distillation, utilizing their different vapor pressures to achieve separation. Hence, option d) distillation is correct.

To separate a liquid mixture of water (H₂O) and pentane (C₅H₁₂), the best method would be distillation. The process of distillation involves choosing which parts of a liquid mixture to evaporate and condense. The difference in the vapour pressures, or volatilities, of the individual components is the basis of separation. This process leverages the significant difference in the vapor pressures of the two liquids. By heating the mixture, the component with the higher vapor pressure (in this case, pentane) will vaporize first. The vapor can then be condensed back into a liquid and collected, effectively separating it from water. The process of decanting involves separating mixtures of immiscible liquids or liquids and solids, like a suspension. Filtration is a physical technique that uses a filter media with a complicated structure that only allows fluid to flow through to separate solid matter and fluid from a mixture. Chromatography is a technique for separation in which a stationary phase is pushed through a liquid or gaseous mobile phase containing the analyte.

Answer: The correct answer is Option B.

Explanation:

Oxidizing agent is the agent which oxidizes the other substance and itself gets reduced. It undergoes reduction reaction in which, it gains electrons and also the oxidation state of the substance gets reduced.

Reducing agent is the agent which reduces the other substance and itself gets oxidized. It undergoes oxidation reaction in which, it looses electrons and the oxidation state of the substance is increased.

For the given chemical equation:

[tex]Cu+2AgNO_3\rightarrow 2Ag+Cu(NO_3)_2[/tex]

Half reactions for the given chemical reaction:

[tex]Cu\rightarrow Cu^{2+}+2e^-[/tex]

Copper is loosing 2 electrons, thus it is undergoing oxidation reaction and is considered as a reducing agent.

[tex]Ag^++e^-\rightarrow Ag[/tex]

Silver ion is gaining 1 electron per atom, thus it is undergoing reduction reaction and is considered as an oxidizing agent.

Hence, [tex]AgNO_3[/tex] is considered as an oxidizing agent and therefore the correct answer is Option B.

Answer:

B

Explanation:

Among all the given options, the correct option is option D. Electrons are shared when molecules are formed.

It's not always clear what a molecule, compound, or atom means. Here are some examples of typical molecules along with an explanation about what a molecule are (and is not). When a group of atoms interact chemically, molecules are created. Whether the atoms are identical or dissimilar to one another is unimportant.

Elements' lone atoms are not molecules. O, the symbol for oxygen, is not really a molecule. When oxygen forms a link with another element or with itself, molecules are created. Electrons are shared when molecules are formed. Both simple and complicated molecules exist.

Therefore, the correct option is option D.

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Answer: phosphorous (P)

Explanation: Trust Me :)

Answer:

the answer is phosphorous

Explanation:

I just took test and got 100%

Option B is correct option.

The half-reaction 2MnO2 + H2O + 2e- Mn2O3 is missing  OH- ions.

Explanation:

Full equation:

                                          2MnO2 + H2O + 2e-  → Mn2O3 + 2OH-

The option B which is Mg is stronger reducing agent than Ag is correct option.

Explanation:

Equation:

                               Mg(s) + 2Ag+ (aq) → Mg2+ (aq) + 2Ag(s)

According to equation Mg converts to Mg+2 which means it gives to electron to reduce Ag. So it act as an reducing agent.

The correct option is B. Which is  5, 1, 8, 5, 1, 4.

Explanation:

Full equation :

                  5 Fe²⁺ (aq) + MnO₄⁻ (aq) + 8 H⁺ (aq) --> 5 Fe³⁺ (aq) + Mn²⁺ (aq) + 4 H₂O (l)

The study of chemicals and bonds is called chemistry. There are different types of elements and these are metals and nonmetals.

The correct answer is mentioned below.

The answer to the first question is as follow:-

The full reaction is as follows:-

[tex]2MnO_2 + H_2O + 2e^- ----> Mn_2O_3 + 2OH^-[/tex]

The answer to the second question is as follow:-

Mg is a stronger reducing agent than Ag is correct

The reaction is as follows:-

[tex]Mg(s) + 2Ag+ (aq) ---> Mg2^+ (aq) + 2Ag(s)[/tex]

According to the equation Mg converts to Mg+2 which means it gives to electron to reduce Ag. So it acts as a reducing agent.

The answer to the third question is option B Which is  5, 1, 8, 5, 1, 4.

The full equation is as follows:-

[tex]5 Fe^{2+} (aq) + MnO_4^- (aq) + 8 H^+(aq) --> 5 Fe^{3+} (aq) + Mn^{2+} (aq) + 4 H_2O (l)[/tex]

Hence, the correct answer is described.

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Answer:

Explanation:

The given number is 6.02 × 10⁹. It is written is scientific notation.

As you see it has two parts:

If the exponent is negative means that the decimal point must be moved to the left and if the exponent is positive means that the decimal point must be moved to the right.

In the number 6.02 × 10⁹ the exponent is 9, so you must move the decimal point 9 places to the right:

The produced moles of O₂ is "0.300 mol".

According to the question,

Moles of KO₂:

The equation is:

→ [tex]4 KO_2 + 2 CO_2 \rightarrow 2 K_2CO_3+ 3 O_2[/tex]

Now,

→ The moles of O₂ will be:

= [tex]\frac{3}{4}\times moles \ of \ KO_2[/tex]

By substituting the values, we get

= [tex]\frac{3}{4}\times 0.400[/tex]

= [tex]0.300 \ mol[/tex]

Thus the above answer is right.

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Given:

Force acting on the car moving it to the right = F1= 300 N

Force due to friction and air resistance moving it to the left = F2 = 150 N

To determine:

The net force on the car

Explanation:

Force is a vector. The force of friction acts in a direction opposite to the applied force.

If, F1 = 300N, right, then F2 = -150 N, left

Therefore, the net force acting on the car will be:

F = F1+F2 = 300 - 150 = 150 N

Ans: Since the force acting on the right is greater, the car will experience a net force of 150 N which will accelerate it to the right

A would be correct. Hope i helped.

When you decrease the pressure, molecules don't hit each other as often and the rate of reaction decreases. Pressure is also related to concentration and volume. By decreasing the volume available to the molecules of gas, you are increasing the concentration of molecules in a specific space.

Lowering the amont of reactants

Among these elements the strontium (Sr) has lowest first ionization energy.

The first ionization energy is the energy required to remove one mole of the most loosely held electrons from one mole of gaseous atoms to produce 1 mole of gaseous ions each with a charge of 1+.

The first of two main methods which scientists use to calculate the ionization energy is the Subtraction Method.

Answer:

Sr

Explanation:

Answer:-  6200 kg

Solution:- Volume of bromine is given as [tex]2.0m^3[/tex] and it's density is [tex]\frac{3.1g}{mL}[/tex]. It asks to calculate the mass of bromine in kg.

We need to do the unit conversions for volume from [tex]m^3[/tex] to [tex]cm^3[/tex] and then mL. After this the volume is multiplied by density to get the mass in grams that could further be converted to kg. The set is shown as:

[tex]2.0m^3(\frac{(100cm)^3}{1m^3})(\frac{1mL}{1cm^3})(\frac{3.1g}{1mL})(\frac{0.001kg}{1g})[/tex]

= 6200 kg

So, the mass of bromine in the given volume of it is 6200 kg.

Final answer:

To find the mass in kg of 2.0 m3 of Br2, we convert the volume to cm3, use the given density to find the mass in grams, and then convert the mass to kilograms, resulting in 6,200 kg.

Explanation:

The question asked is: What is the mass (in kg) of 2.0m3 of Br2? Given that 1 mL is equal to 1 cm3 and 3.1 g Br2 = 1 mL Br2, the first step is to convert the given volume in meters cubed (m3) to cubic centimeters (cm3). Knowing that 1 m = 100 cm, we cube both sides to get 1 m3 = 1,000,000 cm3 or 106 cm3.

Therefore, 2.0 m3 = 2.0 × 106 cm3. Next, we use the density of Br2 to find the mass: 3.1 g/cm3. So, the mass of 2.0 m3 of Br2 in grams is 2.0 × 106 cm3 × 3.1 g/cm3 = 6,200,000 g. To convert this to kilograms, we divide by 1,000, resulting in 6,200 kg.

PWR stands for many things. Since you're talking about nuclear power reactors I think PWR stands for pressurized water reactor.

A pressurized water reactor follows many steps but the main goal is to obtain thermal energy from water.

Hope it helped,

BioTeacher101

newtons third law is.........

for every reaction there is an equal and oposite reaction force

ex. im pushing the squares on my keyboard and it pushing back on me

im siting on my chair, the chair pushes on the floor and my butt pushes on the chair

The following accurately describes Newton’s third law is:

d) "For every action force, there is an equal and opposite reaction force."

Newton's third law of motion, often stated as "For every action, there is an equal and opposite reaction," describes the relationship between the forces acting on two interacting objects. According to this law, when one object exerts a force on a second object, the second object exerts a force of equal magnitude but in the opposite direction on the first object. This law illustrates the principle of conservation of momentum, which means that the total momentum of an isolated system remains constant.

The other options provided are not accurate descriptions of Newton's third law:

a) "The relationship among mass, acceleration, and net force" refers to Newton's second law of motion (F=ma), which explains the relationship between force, mass, and acceleration of an object.

b) "The stronger the net force acting upon an object, the greater the acceleration of the object" is a partial description of Newton's second law, which states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.

c) "An object in motion stays in motion, and an object at rest stays at rest, unless an unbalanced force acts upon it" is Newton's first law of motion, also known as the law of inertia. It describes how an object's motion remains unchanged unless acted upon by an external force.

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Answer is: The chemical equation must be balanced so that it follows the law of conservation of mass.

For example, ablanced chemical reaction:  

Pb(NO₃)₂(aq) + Li₂SO₄(aq) → PbSO₄(s) + 2LiNO₃(aq).

According to law (principle) of mass conservation, number of atoms must be equal on both side of balanced chemical reaction.  

There are two lithium atoms, one lead atom, one sulfur atom, ten oxygen atoms and two nitrogen atoms on both side of reaction.

A chemical equation should be balanced because of law of mass conservation.

C3H8 is saturated compound.

A saturated compounds are organic compounds having single covalent bond between carbon atoms.

Answer: saturated

Explanation:

Saturated hydrocarbons are defined as the hydrocarbons in which a single bond is present between carbon and carbon atoms. The general formula for these hydrocarbons is [tex]C_nH_{2n+2}[/tex].

Unsaturated hydrocarbons are defined as the hydrocarbons which have double or triple covalent C-C bonds. They are known as alkenes and alkynes respectively. The general formula for these hydrocarbons is [tex]C_nH_{2n}[/tex] and [tex]C_nH_{2n-2}[/tex].

The given compound is [tex]C_3H_8[/tex] belongs to formula [tex]C_nH_{2n+2}[/tex]  where n=3 and thus a saturated hydrocarbon.

Carbon atoms have the unique ability to form stable covalent bonds with themselves and other elements, enabling them to create large and complex macromolecules. This versatility allows for the formation of carbon-based macromolecules such as proteins, nucleic acids, and carbohydrates. Carbon's bonding properties are crucial to the diversity and functionality of organic molecules in living organisms.

The structure of a carbon atom is such that it can form stable covalent bonds with a variety of other atoms, including itself. This unique capability enables carbon to act as a building block for large molecules or macromolecules, essential to life. For instance, carbon's ability to bond with up to four different atoms allows for the formation of complex structures such as long chains, branching chains, and rings -- all of which are foundational structures in organic chemistry.

Macromolecules like proteins, nucleic acids, carbohydrates, and lipids all utilize carbon as their structural backbone. These macromolecules are essentially polymers, made of repeating units called monomers. These monomers, comparable to beads on a string, covalently bond together to form the larger polymers. The great variety of ways these carbon-based monomers combine results in the extraordinary diversity of organic compounds found in living organisms.

The ability to form multiple bonds with itself and other elements leads to a nearly limitless array of organic molecules. This property is foundational to the fields of organic chemistry and biochemistry, which study the complex molecules that determine the forms and functions of living systems.

Final answer:

The carbon atom's unique capacity to form stable covalent bonds with up to four different atoms, including itself, enables the construction of assorted large molecules essential for life, such as macromolecules and biochemistry's complex structures.

Explanation:

The structure of a carbon atom enables it to form large molecules due to its unique ability to establish stable covalent bonds with a wide variety of atoms, including other carbon atoms. A carbon atom can bond to as many as four different atoms simultaneously, creating a flexible backbone for macromolecules and allowing for the formation of complex structures. This versatility is evident in the fact that carbon is at the heart of an immense diversity of organic compounds, ranging from simple monomers to complex polymers and various functional groups. Carbon's capacity for forming long chains, branches, and rings plays a crucial role in the development of complex molecules needed for life, such as proteins, nucleic acids, carbohydrates, and lipids.

The ability of carbon to link with other elements like nitrogen, oxygen, and phosphorus further expands the repertoire of biological macromolecules. Subsequently, this accounts for the vast diversity of forms and functions in living organisms, earning carbon a central place in the study of biochemistry.

Answer is: Kr (krypton).

Krypton is a chemical element with symbol Kr and atomic number 36.

Krypton has 36 electron and 36. It is noble gas (group 18).

Noble gases are in group 18: helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe) and radon (Rn). They have very low chemical reactivity.

Platinum (Pt), vanadium (V) and lithium (Li) are metals.

Answer:

Krypton is non metal.

Explanation:

The difference between a metal and non metal is that metals are ready to give electrons to attain half filled or full filled electron stability.

Non metal are reluctant to give electrons.

Out of the given choices

a) Pt : platinum is a transition metal.

b) V : Vanadium is a transition metal.

c) Li: Lithium is an alkali metal

d) Kr : Krypton is a non metal. It is a noble gas with full filled stability.

Pressure will increase

If gas is moved from a large container to a small container but its temperature and number of moles remain the same then its pressure will increase. Because whenever a gas is moved from a large container toward small container it pressures increases this is also true for liquids there pressure also increases when they move from a large surface area to small surface area.

Which of the following pairs is an example of the diagonal rule?  

Fe, Rh