.convert the following temperatures to kelvin (a) 113 degree Celsius, the melting point of sulfur, (b) 37 degree Celsius, the normal body temperature, (c) 357 degree Celsius, the boiling point of mercury.

Answer:

The granite block transferred 4080 joules of energy, and the mass of the water is 35.84 grams.

Explanation:

The equation needed to answer both parts of the question is:

Q = mcΔT

In this equation,

-----> Q = energy/heat (J)

-----> m = mass (g)

-----> c = specific heat (J/g°C)

-----> ΔT = change in temperature (°C)

Part #1:

First, you need to find the energy transferred from granite block using the previous equation. You have been given the mass, specific heat, and change in temperature.

Q = ? J                            c = 0.795 J/g°C

m = 126.1 g                     ΔT = 92.6 °C - 51.9 °C = 40.7 °C

Q = mcΔT

Q = (126.1 g)(0.795 J/g°C)(40.7 )

Q = 4080

Part #2:

Secondly, using the energy calculated in Part #1, you need to calculate the mass of the water. You have calculated the energy transferred, and have been given the specific heat and change in temperature.

Q = 4080 J                     c = 4.186 J/g°C

m = ? g                            ΔT = 51.9 °C - 24.7 °C = 27.2 °C

Q = mcΔT

4080 J = m(4.186 J/g°C)(27.2 °C)

4080 J = m(113.8592)

35.84 = m

Answer: blank 1: 4,080 joules

Blank 2: 35.8 grams

Explanation:

Answer:

Metals

Explanation:

Positive ions are formed when atoms give up some valence electrons in order to have a full octet. The atoms most likely to do this have a small number of valence electrons. Most to these atoms are generally in the s-block (left side) of the periodic table. These elements are metals.

*nonmetals are located in the p-block (right side) and noble gases are located in the 18th column (far right column)

The Correct electron configuration of carbon as 1s² 2s² 2p². Option B.

To understand why this is the correct electron configuration, let's break it down step by step:

The atomic number of carbon is 6, which means it has six electrons. Electrons are distributed in energy levels or shells around the nucleus.

The first shell, known as the 1s orbital, can hold a maximum of 2 electrons. Therefore, the first part of the electron configuration is 1s², indicating that two electrons occupy the 1s orbital.

The second shell has two subshells: the 2s orbital and the 2p orbital. The 2s orbital can hold a maximum of 2 electrons, while the 2p orbital can hold a maximum of 6 electrons. In the case of carbon, after the 1s orbital, two more electrons occupy the 2s orbital. So far, we have 1s² 2s².

The remaining two electrons in carbon are placed in the 2p orbital. The 2p orbital consists of three separate p orbitals: 2px, 2py, and 2pz. Each p orbital can hold a maximum of 2 electrons. Therefore, the last part of the electron configuration for carbon is 2p², indicating that two electrons occupy the 2px and 2py orbitals. Option B is correct.

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These are 10 unique questions you can ask your fellow classmates about the things they have learned in your special ed classroom:

A special education classroom is a classroom designed to meet the needs of students with disabilities. These classrooms are staffed by specially trained teachers who are able to provide individualized instruction and support to students with a variety of disabilities.

These questions are designed to get your classmates thinking about the things they have learned in your special ed classroom and how those things have impacted them. The answers to these questions can be used to create a powerful and informative ad for your classroom.

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The rate of a reaction refers to how fast or slow a reaction progresses over time. Option B is correct.

It is a measure of the change in concentration of reactants or products per unit of time. The rate of a reaction can be expressed in different units, such as moles per liter per second or grams per second. Factors that can affect the rate of a reaction include the concentrations of the reactants, the temperature, the presence of a catalyst, and the surface area of the reactants.

The rate law equation, which expresses the dependence of the reaction rate on the concentrations of the reactants, can also be used to determine the rate of a reaction under different conditions. The rate of a reaction is important for many applications, such as designing chemical reactions for industrial processes, optimizing reaction conditions in laboratories, and understanding biological processes that involve chemical reactions. Option B is correct.

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Answer:

its does not

Explanation:

not do...................

Answer:

86.85°C

Explanation:

K = °C + 273.15

360K − 273.15 = 86.85°C ≈ 87°C

Answer:

rapid chemical combination of a substance with oxygen, involving the production of heat and light.

Explanation:

Combustion is a chemical process in which a substance reacts rapidly with oxygen and gives off heat. The original substance is called the fuel, and the source of oxygen is called the oxidizer.

if you want to learn more:

https://www.britannica.com/science/combustion

https://youtu.be/xd1alir07q4

Answer:

Explanation:

Color changes are an evolutionary survival mechanism, borne of a rabbit's status as prey animals. Rabbits molt several times a year. Their fur initially grows and then grows back a different shade, camouflaging them from potential predators.

hope it helps

have a nice day!!!!

Answer:

Compound A:    1-bromo-1-methylcyclohexane

Compound B:     1-methylcyclohex-1-ene

Explanation:

In this question, we can start with the I.D.H (hydrogen deficiency index):

\(I.D.H~=~\frac{(2C)+2+(N)-(H)-(X)}{2}\)

In the formula we have 7 carbons, 13 hydrogens, and 1 Br, so:

\(I.D.H~=~\frac{(2*7)+2+(0)-(13)-(1)}{2}=1\)

We have an I.D.H value of one. This indicates that we can have a cyclic structure or a double bond.

We have to keep in mind that the Br atom must be bonded to a tertiary carbon. We can not have a double bond because in the ozonolysis reaction we have only 1 product, therefore, we can not have a double bond in the initial molecule (if we have a double bond in the initial molecule we will have more than 1 product in the ozonolysis reaction).

With this in mind, we will have a cyclic structure. If we have 7 carbons and we need a tertiary alkyl halide. We can have a cyclic structure of 6 members and a methyl group bonded to a carbon that also is bonded to a Br atom (1-bromo-1-methylcyclohexane).

In the reaction with \(CH_3CH_2ONa\) we will have an elimination reaction. In other words, we have the production of a double bond inside of the cyclic structure (1-methylcyclohex-1-ene).

See figure 1 for further explanations.

I hope it helps!

Answer:

\(V_2=0.894L\)

Explanation:

Hello there!

In this case, according to the given information, it turns out possible for us to solve this problem by using the Boyle's law for an inversely proportional relationship between pressure and volume at constant temperature, as described in the problem statement:

\(P_2V_2=P_1V_1\)

Thus, we solve for V2, final volume, to obtain the following result:

\(V_2=\frac{P_1V_1}{P_2} \\\\V_2=\frac{1.27atm*2.78L}{3.95atm}\\\\V_2=0.894L\)

Regards!

Answer: nice, is this a quistion? xd

Explanation:

Answer:

O-O

Explanation:

mmmmmmmmmmmmmmmmmmmmmmmmmmm

To solve the dilution problem, we can use the formula:

C₁V₁ = C₂V₂

Where:

C₁ is the initial concentration,

V₁ is the initial volume,

C₂ is the final concentration, and

V₂ is the final volume.

Given:

C₁ = 12 M (concentration of the concentrated HCl),

V₂ = 500 mL (final desired volume),

C₂ = 2.0 M (final desired concentration).

Let's solve for V₁:

C₁V₁ = C₂V₂

(12 M)(V₁) = (2.0 M)(500 mL)

Cross multiplying:

12V₁ = 2.0 × 500

12V₁ = 1000

V₁ = 1000 / 12

V₁ ≈ 83.33 mL

Therefore, the chemist should measure out approximately 83.33 mL of concentrated 12 M HCl to produce 500 mL of 2.0 M HCl.\(\)

Answer:Exothermic reactions are reactions or processes that release energy, usually in the form of heat or light. In an exothermic reaction, energy is released because the total energy of the products is less than the total energy of the reactants.

Explanation:lol

The concentration of chloride ions when 2.5 g of FeCl is dissolved in 150 mL of water is approximately 0.54 M.

To determine the concentration of chloride ions when 2.5 g of FeCl is dissolved in 150 mL of water, we need to consider the molar mass of FeCl and perform some calculations.

The molar mass of FeCl is 55.85 g/mol (for iron) + 35.45 g/mol (for chlorine), which gives a total molar mass of 91.3 g/mol for FeCl.

First, we need to calculate the number of moles of FeCl present in 2.5 g of the compound. This can be done using the formula:

moles = mass / molar mass

moles of FeCl = 2.5 g / 91.3 g/mol = 0.027 moles

Next, we convert the volume of water from milliliters (mL) to liters (L):

volume of water = 150 mL = 150/1000 L = 0.15 L

Now, we can calculate the concentration of chloride ions (Cl-) using the formula:

concentration (Cl-) = moles of Cl- / volume of water

Since FeCl dissociates into one Fe3+ ion and three Cl- ions, the number of moles of Cl- is three times the moles of FeCl:

moles of Cl- = 3 * moles of FeCl = 3 * 0.027 moles = 0.081 moles

concentration (Cl-) = 0.081 moles / 0.15 L = 0.54 M.

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The following balanced chemical equation may be used to describe the interaction between aluminum (Al) and calcium nitrate (Ca(NO₃)₂):

2 Al + 3 Ca(NO₃)₂ → 2 Al(NO₃)3 + 3 Ca

Reactants are the chemicals that begin a chemical reaction, while products are the compounds that are created as a result of the reaction.

The substances that initiate a chemical reaction. Products are the substances that are created during the reaction. Compounds or elements can act as reactants and products.

Aluminium and calcium nitrate interact in this reaction to form aluminium nitrate (Al(NO₃)₃) and calcium (Ca), which are the end products.

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Mechanical disintegration means breaking into small pieces (option A).

Digestion is the process occuring in the gastrointestinal tract, by which food is converted into substances that can be utilized by the body.

Digestion can, however, be mechanical/physical or chemical/enzymatical. The mechanical digestion involves the breaking down of food into smaller pieces by teeth.

Therefore, according to this question, there is no passage, however, the meaning of mechanical disintegration can be easily detected in biology.

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The following applies to the above equation:

Brønsted-Lowry acid is the any chemical species that acts as a donor of protons while Brønsted-Lowry base is any chemical species that acts as a proton acceptor.

In the following equation: HCOOH(aq) + PO43-(aq) = HCOO-(aq) + HPO42-(aq)

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The pH at the equivalence point in the titration of 50.0 ml of 0.300 M CH₃COOH with 0.3 M NaOH is 8.61.

At the equivalence point in the titration of CH₃COOH with NaOH, the pH is determined by the hydrolysis of the salt formed, which is CH3COO⁻ and Na+.

The equation for the hydrolysis reaction is:

CH3COO⁻ + H2O ⇌ CH3COOH + OH⁻
We can use the Ka value for CH₃COOH to find the Kb value for CH3COO⁻ using the equation:

Kw = Ka x Kb

Where Kw is the ion product constant for water (1.0 x 10⁻¹⁴).
Kb = Kw/Ka

= (1.0 x 10⁻¹⁴)/(1.8 x 10⁻⁵)

= 5.56 x 10⁻¹⁰
Now we can use the Kb value to find the concentration of OH⁻ at the equivalence point using the equation:

Kb = ([OH⁻][CH3COOH])/[CH3COO⁻].

Since the concentrations of CH3COOH and CH3COO⁻ are equal at the equivalence point, we can simplify the equation to Kb = ([OH⁻]²)/[CH₃COO⁻].
Hence,
[OH-] = \(\sqrt{Kb(CH3COO-)}\)

=\(\sqrt{5.56(10^{-10})(0.3) }\)

= 4.06 x 10⁻⁶ M
Use the concentration of OH⁻ to find the pH at the equivalence point using the equation pOH = -log[OH-] and the relationship pH + pOH = 14.
pOH = -log(4.06 x 10⁻⁶)

= 5.39
pH = 14 - 5.39

= 8.61
Therefore, the pH at the equivalence point in the titration of 50.0 ml of 0.300 M CH3COOH with 0.3 M NaOH is 8.61.

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Answer:

B

Explanation:

The International System of Units (SI) is the international system of measurement based on English units. It includes seven fundamental units that measure various parameters. Thus, option C is correct.

SI is abbreviated for the International System of Units and is a coherent measurement system that measures time, mass/weight, electric current, length, temperature, luminous intensity, and amount of substance.

The base or the fundamental units includes ampere (A), meter (m), second (s), kelvin (K), candela (cd), kilogram (kg), and mole (mol). These units can be used to formulate the derived units like that of the mass. The SI units are used internationally and are universal.

Therefore, option C. the International System of Units (SI) is based on English units.

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The heat of vaporization of benzene is required.

The heat of vaporization of benzene is 33009 J/kg.

\(T_0\) = Normal boiling point = 80.1+273.15 K

\(T_B\) = Boiling point at given pressure = 26.1+273.15 K

\(R\) = Gas constant = 8.314 J/mol K

\(P\) = Pressure at given \(T_B\) = 100 torr

\(\Delta H\) = Heat of vaporization

From the Clausius–Clapeyron equation

\(\dfrac{1}{T_B}=\dfrac{1}{T_0}-\dfrac{R\ln(\dfrac{P}{P_0})}{\Delta H}\\\Rightarrow \Delta H=\dfrac{R\ln\dfrac{P}{P_0}}{\dfrac{1}{T_0}-\dfrac{1}{T_B}}\\\Rightarrow \Delta H=\dfrac{8.314\times \ln\left(\frac{100}{760}\right)}{\frac{1}{80.1+273.15}-\frac{1}{26.1+273.15}}\\\Rightarrow \Delta H=33008.99\ \text{J/kg}\)

The heat of vaporization of benzene is 33009 J/kg.

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Answer:

H3PO4 + 3NaOH ----> Na3PO4 + 3H2O

Explanation:

The balanced equation is given below

H3PO4 + 3NaOH ----> Na3PO4 + 3H2O

Answer:

\(H_3PO_4 (aq) + 3NaOH (aq) \rightarrow 3H_2O (l) + Na_3PO_4 (aq)\)

Explanation:

Hello,

In this case, for the given reaction:

\(H_3PO_4 (aq) + NaOH (aq) \rightarrow H_2O (l) + Na_3PO_4 (aq)\)

We must assure the law of conservation of mass is respected, so we equal the number of atoms at each side of the equation by adding the stoichiometric coefficients to the left of each compound as shown below:

\(H_3PO_4 (aq) + 3NaOH (aq) \rightarrow 3H_2O (l) + Na_3PO_4 (aq)\)

So the coefficients are 1, 3, 3 and 1 respectively for each species in the chemical reaction.

Regards.

This angle is greater than the right angle. The correct option is A.

The right angle is created when two straight lines cross at a 90° angle, or when they are perpendicular at the intersection. The symbol ∟ represents a right angle.

Look at this angle in the picture. This angle is greater than a right angle. The right angle is 90 degrees, and the angle is greater than the right angle. The angle can be 95 degrees.

Therefore, the correct option is A. greater than a right angle. A right angle looks like the corner of a square.

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The question is incomplete. Your most probably complete question is given below:

A. greater than a right angle

B equal to a right angle

C less than a right angle

Answer

Explanation

Lithium and sodium belongs to group 1 in the periodic table; meaning that they both have 1 electron each in their outermost shell. Both can lose their outermost electron to form ion. They will now has more positive protons than electrons so they will have an overall positive charge.

Therefore, lithium and sodium it is a positive ion

The solubility of a substance tells us the amount of solute that is capable of dissolving a given amount of solvent at a given temperature. We speak that a solution is.

Now, if the amount is less than the statement says, it will be an unsaturated solution.

When the amount is greater, the solution is supersaturated and a precipitate of solute will form in the solution.

According to what has been explained, the solution described by the statement is an unsaturated solution.

Answer: Unsaturated

The molarity of the solution containing \(3.2 mol\) oF \(H_2SO_4\) dissolved in  \(2.5 L\) of solution is \(1.28 mol/L.\)

The number of moles of a solute dissolved in one litre of solution is measured in molarity, a unit of concentration used in chemistry. It has units of moles per litre (mol/L) and is represented by the sign "M".

To calculate the molarity (M) of a solution, you can use the formula:

Molarity (M) = moles of solute / liters of solution

Given:

moles of \(H_2SO_4 = 3.2 mol\)

volume of solution  \(= 2.5 L\)

Plugging these values into the formula, we get:

Molarity (M) \(= 3.2 mol / 2.5 L\)

Calculating the value, we get:

Molarity \((M) = 1.28 mol/L\)

Therefore, the molarity of the solution containing \(3.2 mol\)  of  \(H_2SO_4\) dissolved in  \(2.5 L\) of solution is\(1.28 mol/L\) .

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2.87 L of water vapor would be produced for every 1.9 L of consumed ammonia.

One nitrogen atom and three hydrogen atoms make up the colorless gas known as ammonia, which has a strong odor. It has the molecular formula NH3. Ammonia is very soluble in water, making liquid form convenient to handle and store.

The balanced chemical formula for the ammonia and oxygen reaction that produces water vapor and nitrogen monoxide is:

4 NH3(g) + 5 O2(g) =  4 NO (g) + 6 H2O(g)

We can see from the equation that everything balances out that 6 moles of water vapor are created for every 4 moles of ammonia that is consumed. This ratio can be used to determine how much water vapor will be created when 1.9 L of ammonia is consumed.

We must first translate the amount of ammonia from liters to moles. Every gas has a 22.4 L/mol molar volume at standard temperature and pressure (STP).

1.9 L of ammonia is equal to:

 1.9 l / 22.4 l/mol=0.085 moles of ammonia.

Next, we can determine how many moles of water vapor were created using the mole ratio from the balanced equation:

6 moles of H2O are created from 4 moles of NH3.

x moles of H2O are produced from 0.085 moles of NH3.

x=(0.085 moles NH3) x (6 moles H2O/ 4 moles NH3) = 0.128 moles H2O

Using the molar volume, we can finally convert the moles of water vapor generated at STP to volume:

0.128 moles of H2O x 22.4 L/mol = 2.87 L of H2O

Consequently, 2.87 L of water vapor would be produced for every 1.9 L of consumed ammonia.

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