When heat moves through an object in an assembly that is more conductive than materials around it, that is described as ________

Answer:

B

Explanation:

seriously (MÀJÌKÁÎ DÊẞÜ)

Atomic # / Symbol / Name / Melting Point (ºC) / Boiling Point (ºC)

1        /         H    /    Hydrogen   /   -259.14   /   -252.87

2      /        N      /   Nitrogen      /   -209.86    /   -195.8.

3     /       NH3   /  Compound Ammonia  /  -77.7  /  -33.3

For Hydrogen, the Melting point is -259.14, while for the Nitrogen it's -209.86. And the boiling point for Hydrogen is -252.87, while for the Nitrogen it's -195.8. The difference is that Hydrogen has less temperature in melting and boiling points, while Nitrogen has more. And for the Ammonia, this one has the most temperature, being at -77.7 degrees celsius for melting point, which is -107.9°F, and being at -33.3 degrees celsius, which is -28.01°F

The pH of buffer solution is 2.1225

We know that

pH = [tex]pK_a[/tex]   + [tex]log_1_0 \frac{[A]^{-} }{[HA]}[/tex]

In this question

[tex]pK_a[/tex] = 2.40

[tex][A]^{-}[/tex] = 4.75 mol

[HA] = 9 mol

Therefore putting values in formula

pH = 2.40 + [tex]log_1_0\frac{4.75}{9}[/tex]

pH = 2.40  + [tex]log_1_0[/tex] 0.52

pH = 2.40 - 0.283

pH = 2.1225

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Atoms in the amino acids become the h₂O molecule produced by their action in the model and come off from the central carbon and nitrogen but not from the carboxyl, R side chain, or amine.

An amino acid is a group of organic molecules that consist of a basic acidic carboxyl group (―COOH), amino group (―NH2), and an organic R group (or side chain) that is different from each amino acid. Amino acid, the term is a short form of α-amino [alpha-amino] carboxylic acid.

Whereas, the peptide bond is the chemical bond which is a chemical bond formed between two molecules when the carboxyl group of a particular molecule reacts with the amino group of the other molecule, leading to releasing a molecule of water (H2O).

Each molecule consists of a central carbon atom referred to as the α-carbon, to which both a carboxyl group and amino are attached. The remaining two bonds of the α-carbon atom are generally occupied  by  the R group and a hydrogen (H) atom .

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The correct set is N, S, and I.

The right combination is N, S, and I.

The ions of two separate elements, one of which is a metal and the other a nonmetal, make up a binary ionic combination. As a result, in binary ionic compounds, metals form cations and non-metals produce anions. As non-metals, nitrogen (N), sulfur (S), and iondine (1) produce anions in binary ionic compounds  anions.

Since Li is a metal, it cannot form an anion.

The other sets are wrong.

Being metals, Rb and Al do not form.

Sr, Ni, and other metals are not anions since they are metals.

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Multiple factors can affect the accuracy of a pulse oximeter reading, such as

Observe the manufacturer's recommended usage procedures. When you put the oximeter on your finger, make sure your hand is cosy, relaxed, and positioned below the level of your heart.

Remove any nail paint you might have had on that finger. While you are still seated, do not move the location of the pulse oximeter on your body. Wait for the reading to stabilize and display a single number after a brief interval.

If you note your oxygen levels along with the date and time of the reading, you can easily track changes in them and inform your healthcare physician about them. Follow your doctor's recommendations for how often and when to check your oxygen levels.

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The atomic number of an isotope of tellurium that has 71 neutrons is 52.

The atomic number of an element is the number of protons in an atom of that element.

The number of protons in an atom can be got by subtracting the mass number of an element from the number of neutrons.

According to this question, one isotope of tellurium, tellurium-123, has 71 neutrons. The atomic number or proton number can be calculated thus;

atomic number = 123 - 71

atomic number = 52

Therefore, the atomic number of an isotope of tellurium that has 71 neutrons is 52.

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Answer:

Explanation:l do not no the answer

When an acid is dissolved in water, by releasing protons into the solution, it lowers the pH.

What is pH?

The letters pH stand for the potential of hydrogen since pH is essentially a measurement of the number of hydrogen ions (i.e. protons) in a substance. The pH scale was created in 1923 by scientist Peter Lauritz Srensen. (1868-1969).

The pH of a solution is a key marker of its chemical makeup. The pH can have an impact on the biological processes that take place, the behavior of bacteria, and the behavior of chemicals.

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percentage of zinc= 5.985/20 X 100= 29.5%

let x represents zinc and y be magnesium so

Zinc(s) + 2HCl(aq) -----> ZnCl2(aq) +  H2(g)

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

1.152 g of hydrogen gas=( x/65.3 + y/24.305) 20

= 3.08 x10^-2 + 0.8295-8.30

=x=5.985

y= 4.015

percentage of zinc= 5.985/20 X 100= 29.5%

The hydrogen gas escapes, so the two products of Zinc Chloride and Magnesium Chloride will then react with Silver Nitrate. Again, I combine both of the reactions

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Answer:

Explanation: Solid to Solid mixtures

1. Iron+Sulphur

2. Pottasium Nitrate+Potassium Chlorate

3. Ammonium Chloride+Sodium Chloride

Solid to Liquid Mixtures

1. Salt+Water

2. Sand+Water

3. Calcium Carbonate+Water

Liquid to Liquid Mixtures

1. Alcohol+Water

2. Oil+Water

3. Kerosene+Water

Liquid to Gas Mixtures

1. Hydrogen+Oxygen

2. Hydrogen Chloride+Nitogen

3.Air (Air is a mixture of many gases)

Carbon dioxide may be found in solid form as dry ice.

Carbon dioxide may be found in solid form as dry ice. CO2 is widely used for temporary cooling since it does not have a liquid state at normal atmospheric pressure and instead sublimates immediately from the solid state to the gas state.

Dry ice is used as a refrigerant, particularly when shipping perishable goods like meats or ice cream, as it sublimes (passes straight into the vapour without melting) around 78.5 °C (109.3 °F).

Dry ice is carbon dioxide in its solid form.

Mass of CO2 = 10.8g

Molar mass of CO2 = 44g/mol

molecules of CO2 = 10.8g * 1 mol/44g= 0.245 mol * 6.022 * 10²³ molecules/1 mol= 1.48 * 10 ²³molecules.

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The number of molecules is 1.48 × 10 ²³molecules

Elaborate:

Mass of CO₂ = 10.8 g

Molar mass of CO₂ = 44 g/mol

molecules of CO₂ = 10.8 g × 1 mol/ 44 g= 0.245 mol × 6.022 × 10²³ molecules/1 mol= 1.48 × 10 ²³molecules

What is solid ?

Carbon dioxide may be found in solid form as dry ice. CO₂ is widely used for temporary cooling since it doesn't have a liquid state at normal atmospheric pressure and instead sublimates immediately from the solid state to the gas state.

Dry ice is used as a refrigerant, particularly when shipping perishable goods like meats or frozen dessert , because it sublimes (passes straight into the vapour without melting) around 78.5 °C (109.3 °F).

solid is carbon dioxide in its solid form.

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A suitable hypothesis for the above experiment conducted by the chemist is as follows: IF the temperature is increased, THEN the rate of chemical change will also increase.

Experiment is a test under controlled conditions made to either demonstrate a known truth, examine the validity of a hypothesis, or determine the efficacy of something previously untried.

A hypothesis is an educated guess or a tentative conjecture explaining an observation or scientific problem.

According to this question, a chemist is designing an experiment to investigate the effect of temperature on the rate of a chemical change.

This suggests that a suitable hypothesis for the above experiment conducted by the chemist is as follows: IF the temperature is increased, THEN the rate of chemical change will also increase.

Also, the Independent variable is the temperature because it is the variable that is changed.

Dependent variable is the rate of chemical change because it is the measured variable.

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Answer:

A suitable hypothesis for the above experiment conducted by the chemist is as follows: IF the temperature is increased, THEN the rate of chemical change will also increase.

Independent variable - Temperature

Dependent variable - Rate of chemical change

controlled variable - pressure or concentration of the reactants

Answer:

Explanation:

The option that would be true about the shape of the truck is that the truck keeps its shape. Thus, the correct option is D.

What is the volume of solid?

The volume of a solid may be defined as the process of measuring the overall space that an object takes up in its physical structure.

The volume of any solid alters with respect to its shape. If its shape increases, the volume definitely increases, while if its shape decreases, the volume ultimately reduces.

Therefore, the option that would be true about the shape of the truck is that the truck keeps its shape. Thus, the correct option is D.

Use integrated first order rate law, which give you the concentration of reactant sulfuryl chloride as function of time t:  

ln[SO₂Cl₂] = ln[SO₂Cl₂]₀ - k∙t  

([SO₂Cl₂]₀ i the initial concentration and k is the rate constant)  

=>  [SO₂Cl₂] = e^(ln[SO₂Cl₂]₀ - k∙t) = e^(ln[SO₂Cl₂]₀) ∙ e^( - k∙t)  

= [SO₂Cl₂]₀ ∙e^( - k∙t)  

The decomposition of SO₂Cl₂ follows the reaction equation  

SO₂Cl₂ → SO₂ + Cl₂  

So per mole of sulfuryl chloride disappeared one mole of sulfur dioxide is formed. Hence the changes in concentrations of these compounds are related as:  

-∆[SO₂Cl₂] = ∆{SO₂]  <=>  [SO₂Cl₂]₀ - [SO₂Cl₂] = [SO₂] - [SO₂]₀  

Assuming there was initially no sulfur dioxide you get for its concentration:  

[SO₂] = [SO₂Cl₂]₀ - [SO₂Cl₂]  

= [SO₂Cl₂]₀ - [SO₂Cl₂]₀ ∙e^( - k∙t)  

= [SO₂Cl₂]₀ ∙(1 - e^( - k∙t))  

after 210s starting with 0.150M of [SO₂Cl₂]  

[SO₂]= 0.150M ∙(1 - e^( - 1.48×10⁻⁴s⁻¹k ∙ 240s) =

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Answer:

Iron ore

Explanation:

Iron ore is the raw material used to make pig iron, which is one of the main raw materials to make steel

The hypothetical result that would indicate Griffith's transforming substance is only the extracts from heat-killed cells treated with RNAS are unable to transform nonvirulent bacteria into virulent bacteria.

An experiment is a scientific experiment that is conducted by scientists to prove a hypothesis.

In the experiments conducted by the scientists, the pure cells did not produce favorable findings, but they did exhibit transform ants that were quite similar to DNA.

Thus, the correct option is A, Only the extracts from heat-killed cells treated with RNAS are unable to transform nonvirulent bacteria into virulent bacteria.

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

Only the extracts from heat-killed cells treated with RNAS are unable to transform nonvirulent bacteria into virulent bacteria.

All the extracts from heat-killed cells are able to transform to nonvirulent bacteria.

Only the extracts from heat-killed cells treated with D.

The RNA of the bacteria used in this experiment was degraded.

Sn2 mechanism for nucleophilic substitution reactions involves one step and occurs with inversion of configuration is true.

Sn2 is a single-step mechanism in which the bond is broken by the attacking nucleophile from the back of the carbon atom. Two reactants are involved in this reaction.

In this mechanism, The nucleophile approaches the substrate at 180° to the carbon leaving group. The carbon-nucleophile bond is formed and the carbon leaving group breaks.

The nucleophile can attack at the same side where the leaving group is present or the nucleophile can attack from the opposite side of the carbon atom. Since complete inversion of configuration is required, so it is compulsory for the nucleophile to attach from the opposite side.

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Answer:

A detailed map which shows every feature of the earth accurately including roads, airports, names of places etc is called a topographical map

Explanation:

If the price of music lessons falls to $20, the statement which best describes the income and substitution effects is: C. The income effect is that she now can spend more on both goods. The substitution effect is that the price of music lessons relative to socks has decreased so she will definitely buy more music lessons.

Price can be define as an amount of money which is primarily set by the seller of a good (product), and it must be paid by a buyer to the seller, so as to enable the acquisition of this good (product).

Income effect can be defined as a phenomenon which causes an individual (consumer) to adjust his or her consumption of a product due to an increase in its price and change in the level of income.

In conclusion, we can reasonably infer and logically deduce that for each music lesson Emily had purchased before, there is an extra $40 to spend on either music lessons or socks, and as such she might buy more of both due to the income effect.

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Complete Question:

Emily is a rational consumer who gets utility from socks and music lessons, and she considers both of these goods normal goods. Her marginal utility from socks is 50 utils and the price of socks is $5 per pair. Her marginal utility from music lessons is 600 utils and the price of music lessons is $60.

If the price of music lessons falls to $20, which of the following best describes the income and substitution effects?

A. The income effect is that she got a raise from her employer. The substitution effect is that music lessons are now relatively cheaper so she will buy more music lessons.

B. The income effect is that she effectively has more money to spend on either good. The substitution effect is that she will only buy socks now.

C. The income effect is that she now can spend more on both goods. The substitution effect is that the price of music lessons relative to socks has decreased so she will definitely buy more music lessons.

D. The income effect is that she will no longer buy socks because she has more income to spend on music lessons, so she will only buy music lessons.

E. The substitution effect is that she now can spend more on either good. The income effect is that the price of music lessons relative to socks has decreased so she will definitely buy more music lessons.

Alcohols (O-H), acids (COOH), or amines (NH2)-polar groups are need to be present in the R group for hydrogen.

This type of functional group contains only hydrogen and carbon as constituent elements. They are commonly represented with ‘R’. They are also called hydrocarbyl groups. The bonding between the carbon atoms can be single, double, or triple.

When we define a functional group, we imply a group of atoms of the same or different elements forming a chemically-active section of a compound and creating a class of new compounds. In organic chemistry, there are many such functional groups. For example, an alcohol group (-OH) defines a particular set of characteristics of the compounds that have it as a constituent. These characteristics will vary from one functional group to the other.

Therefore,

Three function groups  Alcohols (O-H), acids (COOH), or amines (NH2) needs to be present in the R group for hydrogen.

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1) Many important materials are noncrystalline, such as liquids and gases. Water and air have noncrystalline structures. When a metal is melted, its crystalline structure is lost.

2) Mechanical properties such as high strength are desirable for design, but they make manufacturing more difficult. As a result, design properties disadvantage manufacturing properties and vice versa.

Non-crystalline solids, on the other hand, allow particles to move more freely because they are not as rigidly arranged as other solids. These solids form when a liquid is suddenly cooled. Plastic and glass are two of the most common examples.

As a result, they are referred to as "pseudo solids." Crystalline solids have less energy than non-crystalline solids. Solids are classified into two types: crystalline solids and non-crystalline solids.

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The multiplicities that are observed for the signals in the off-resonance decoupled 13c nmr spectrum of (2e)-3-chloro acrylaldehyde is a singlet, a triplet, and a quartet. The correct option is E.

Off-resonance decoupling is a process of removing all hydrogen and carbon coupling from a signal except for the place which is near the nucleus or joined with the nucleus.

In NMR also, the coupling of hydrogen and carbon is removed except for the place near the nucleus.

Thus, the correct option is E) a singlet, a triplet, and a quartet.

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

A) 2 singlets and a doublet

B) a singlet and 2 doublets

C) 3 singlets

D) a singlet, a doublet, and a triplet

E) a singlet, a triplet, and a quartet

if ammonia is fed to a continuous reactor at a rate of 100.0 kmol nh3/h

175 Kmol/h is oxygen the fed rate that corresponds to 40% excess O₂.

Given chemical reaction is

4NH₃ + 5O₂ → 4NO + 6H₂O

The molecular weight of NH₃ is 17.03, O₂ is 32, NO is 30, and, H₂O  is 18.

To find the ratio,

Ratio = lb-mole O₂ react / lb-mole NO formed

Or, ratio = 5/4

Or, ratio = 1.25

NH₃ fed rate = 100 Kmol/h

We have to find out whether the Oxygen fed rate corresponds to 40% excess O₂.

For each 4 Kmol of NH₃, 5 Kmol of O₂ is required.

4 Kmol of NH₃ ≡ 5 Kmol of O₂

100 Kmol of NH₃ ≡ 125 Kmol of O₂

So, 125 Kmol of O₂  is required for 100 Kmol of NH₃.

For 40% excess of O₂, the required Kmol is = 125 + 125 × 40%

The required Kmol of oxygen is 175 Kmol/h for excess of O₂.

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When 10.0 g of NaCl is added to an aqueous solution of AgNO₃, 24.5 g AgCl will be precipitated.

  The balanced chemical reaction is:

NaCl(aq) + AgNO₃(aq) → AgCl(s) + NaNO₃(aq)

Molar mass of NaCl = 58.5 g

Molar mass of AgCl = 143.5 g

Number of moles of NaCl =     Given Mass    

                                               Molecular Mass

                                          = 10.0 g ÷ 58.44 g/mol

                                          = 0.171 moles

From the reaction,                                            

58.5 g of NaCl produces 143.5 g of AgCl

10.0 g of NaCl will produce 143.5   × 10.0 = 24.5 g AgCl

                                              58.5

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Answer:

text me i can teach you on inbox

Where corrosion protection is vital and the conduit is threaded in the field, the threads must be coated with a(n) Approved electrically conductive, corrosion-resistance compound.

What is corrosion protection?

A corrosion protection method may be a technique used to minimize corrosion such as the application of anti-corrosion coating, cathodic protection, or other methods that make metal resistant to corrosion.

Metal corrosion in most situations is usually slowed, managed, or maybe put to a stop utilizing the right techniques.

What does one mean by corrosion?

Corrosion may be a natural process which converts refined metal to their more stable oxide.It is the gradual destruction of materials {usually metals} by chemical reaction with their environment.In the most common use of the world, this suggests electrochemical oxidation of metals in reaction with an oxidant such as oxygen.

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Number if atoms in 259 g of [tex]C_12H_2_1O_9[/tex] is  [tex]5.04*10^{23}[/tex]

We know that according to Avogadro's law , number of atoms in one mole of molecule is [tex]6.022*10^{23}[/tex] .

In given question we have to find number of atoms in 259 g of [tex]C_12H_2_1O_9[/tex]

The molar mass of [tex]C_12H_2_1O_9[/tex] is given that is [tex]309.29 g/mol[/tex]

Therefore total number of moles =  [tex]given mass / molar mass[/tex]

Number of moles                         = [tex]259/309.29[/tex]

                                                       =[tex]0.8374[/tex]

Thus, number of atoms in 0.8374 mole of [tex]C_12H_2_1O_9[/tex] is given by

                                                        = [tex]0.8374 * 6.022 * 10^{23}[/tex]

                                                        = [tex]5.04*10^{23}[/tex]

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