Answer: The frying pan is made up of metals like aluminium or stainless steel as these metals are good conductor of heat.
Answer:
b. they are good conductors of heat
Explanation:
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Write balanced chemical equations for dissociation of the following weak acids and identify their conjugate bases: phosphoric acid (H3PO4), formic acid (HCO2H), and boric acid (H3BO3).
The conjugate base of an acid is the negative ion that it forms in solution. The conjugate base of each of the following acids are indicated below;
1) H3PO4(aq) ⇄ H^+(aq) + H2PO4^-(aq)(conjugate base)
2) HCO2H(aq) ⇄ H^+(aq) + HCO2^-(aq) (conjugate base)
3) H3BO3(aq) ⇄ H^+(aq) + H2BO3^- (aq) (conjugate base)
What is a conjugate base?When an acid is dissolved in water it is dissociated into ions. The conugate base of the acid is the negative ion that it forms in solution. Let us now see the conjugate base of each of the ions formed;
1) H3PO4(aq) ⇄ H^+(aq) + H2PO4^-(aq)(conjugate base)
2) HCO2H(aq) ⇄ H^+(aq) + HCO2^-(aq) (conjugate base)
3) H3BO3(aq) ⇄ H^+(aq) + H2BO3^- (aq) (conjugate base)
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60 points please help me i will appreciate it!
Answer:
[tex]\huge\boxed{\sf v = 62.7 \ L}[/tex]
Explanation:
Given Data:
Mole = n = 3.38 mol
Temp = t = 269 K
Pressure = 1.19 atm
Gas constant = R = 0.08206 L atm K⁻¹ mol⁻¹
Required:
Volume = v = ?
Formula:
Pv = nRT
Solution:
Rearranging formula
[tex]\displaystyle v = \frac{nRT}{P} \\\\v = \frac{(3.38)(0.08206)(269)}{1.19} \\\\v = \frac{74.6}{1.19} \\\\v = 62.7 \ L\\\\\rule[225]{225}{2}[/tex]
Lithium seems to have dramatic effects on the nervous system, yet our bodies seemingly never evolved to use lithium endogenously, rather focusing on sodium, potassium, and calcium. what is a plausible explanation for this?
Given its small size and high polarizing power, lithium is only involved in covalent rather than ionic bonds in the body as does sodium, potassium, and calcium.
What is lithium?Lithium is a metal and a member of group 1 in the periodic table. It is a very small ion hence it has a different chemistry from the rest of the members of the group.
Lithium is not part of any of the biomolecules because given its small size and high polarizing power, it is only involved in covalent rather than ionic bonds in the body as does sodium, potassium, and calcium.
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Can somebody please help write a short paragraph about this including all the words listed in the question. Thanks!
WILL MARK BRAINLIEST WHOEVER CAN ANSWER FIRST!!! :DDDD
Answer:
Vaccines work by stimulating your immune system to produce antibodies, exactly like it would if you were exposed to the disease. After getting vaccinated, you develop immunity to that disease, without having to get the disease first.
Definition of Tissue:
Answer:
any of the distinct types of material of which animals or plants are made, consisting of specialized cells and their products
Explanation:
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Which images show chemical reactions?
Explanation:
image 3 and 4show chemical reactionsAnswer:
image 3 and 4show chemical reactions
Explanation:
The molar mass of barium nitrate (ba(no3)2) is 261.35 g/mol. what is the mass of 5.30 × 1022 formula units of ba(no3)2? 0.0900 g 12.0 g 23.0 g 3,130 g
Molar mass is the ratio of the mass to that amount of the substance. The mass of the barium nitrate in the formula unit is 23.0 grams.
What is mass?The mass of a substance is the product of the molar mass of the compound and the number of moles of the compound.
Given,
Molar mass of barium nitrate = 261.35 g/mol
If, [tex]6.022 \times 10^{23}[/tex] have a mass of 261.35 g/mol then, [tex]5.30 \times 10^{22}[/tex] formula units will have a mass of,
[tex]\begin{aligned}& = \dfrac{261.35 \times 5.30 \times 10^{22}}{6.022\times 10^{23}}\\\\&= 23.0\;\rm gm\end{aligned}[/tex]
Therefore, option C. 23.0 gm is the mass of barium nitrate.
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Answer:
CExplanation:
23.0g
What mass of glucose can be produced from photosynthesis reaction using 10.0 mols co2
Answer:
300.06 grams of glucose can be produced from a photosynthesis reaction that occurs using 10 moles of carbon dioxide.
Explanation:
The antibiotic prontosil, developed by bayer pharmaceuticals in 1932, was used in saving the life of president roosevelt's son from severe strep throat in 1936. protonsil consists of two nitrogens bonded together in a double bond. the left nitrogen is bonded to a benzene ring where the para position contains a sulfur double bonded to two oxygen atoms and single bonded to n h 2. the right nitrogen is bonded to a benzene ring where one ortho and the para position each have an n h 2 substituent. substituent prontosil is an azo dye, which can be prepared from an aryldiazonium ion and an aromatic compound. draw the structures of the diazonium ion and the coupling component for this drug
Prontosil is a compound produced by the coupled reaction of an aryldiazonium ion and an aromatic compound.
What are diazonium compounds?
These are organic compounds in which there are ionic interactions between the azo group (-N₂⁺) and an anion X⁻.
The general structure is RN₂⁺X⁻.
R is the lateral chain that might be an aromatic ring, among other options.N₂⁺ is the azo groupX⁻ is the anionThe azo group characterizes as being unstable and reactive. This property is because one of the N atoms has a positive charge.
-N⁺≡ N
What is the coupling reaction of aryldiazonium compounds?Aryldiazonium salt reactions can occur in two ways,
Substitution reactionsCoupling reactionsCoupling reactions are the aromatic electrophilic substitution, where the aryldiazonium ion acts as an electrophile for an activated aromatic compound to attack it.
The coupling reaction occurs at the azo group level.
In the exposed example,
the benzene ring with sulfur bonded to oxygen atoms is the coupling componentthe benzene ring with NH₂ and the azo group is the diazonium ionIn the attached files you will find the drawings.
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Are all molecules of ideal gas in motion with different velocities?
Explanation:
Individual gas molecules have different speeds. Collisions between these molecules can change individual molecular speeds, but this does not affect the overall average speed of the system.
What is the ph of the solution formed by mixing 25. 0 ml of a 0. 15 m solution of nh3 with 25. 0 ml of 0. 12 m hcl? (kb for nh3 = 1. 8 10–5 )
Answer:
Explanation:
the answer is 8.66
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The pH of the solution formed by mixing 25. 0 ml of a 0. 15 m solution of NH₃ with 25. 0 ml of 0. 12 m HCl is 8.66.
What is pH?pH is potential hydrogen. It is the measurement of the acidity and basicity of any solution.
The solution of NH₃ is 25. 0 ml of a 0. 15 m
The solution of HCl is 25. 0 ml of 0. 12 m hcl
The pkb value is [tex]1.8 \times 10^-^5[/tex]
Putting the value in the formula
[tex]pOH=pKb +log[NH_3][HCl]\\\\ pOH = 1.8 \times 10^-^5+ log \dfrac{25.0 \times 0.15}{ 25.0 \times 0.12} \\\\ pOH = 1.8\times10^-^5+ log1.25 \\\\pOH = 1.8\times 10^-^5 + 1.25 = 3.05\\\\ pH = 14 - pOH = 14 - 1.25 = 8.66[/tex]
Thus, the pH of the solution formed by mixing 25. 0 ml of a 0. 15 m solution of NH₃ with 25. 0 ml of 0. 12 m HCl is 8.66.
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A student finds that the mass of 25mL of an unknown liquid is 20.3g. What is the density of this substance?
Answer:
Explanation:
as we know density is g/ml or d=(g/ml) we will plug in the values in their respective positions and get the answer.
So the density is 0.812(round it according to the sig figs it asks for).
hello, I need help with this question
Answer:
carnivores organism get their energy from eating other organisms..
Which two elements will be the most alike and why?
Which two elements will be the most alike and why?
Lithium (Li) and Sodium (Na) because they are both metals and are in the same group
Oxygen (O) and Neon (Ne) because they are both noble gases
Helium (He) and Hydrogen (H) because they are both non-metals and are in the same row.
Explanation:
The first statement is correct
Li &Na
Calcite (the main mineral in limestone) is made of calcium carbonate (caco3). dolomite, a related mineral, is made of magnesium carbonate (mgco3). what happens if a geologist drips a small amount of vinegar (acetic acid) onto a sample of dolomite? there is no way to predict what will happen. fizzing will occur because carbon dioxide is produced. no reaction will occur because dolomite contains no calcium.
If a geologist drips a small amount of vinegar (acetic acid) onto a sample of dolomite, fizzing will occur because carbon dioxide is produced.
Why Carbon dioxide show effervescence?Effervescence observes whenever any gas tried to escape out from an aqueous solution, that's why CO₂ show effervescence.
Reaction between dolomite and acetic acid will be represented as:
MgCO₃ + 2CH₃COOH → CO₂ + H₂O + Mg(CH₃COO)₂
From the above reaction it is clear that carbon dixide gas is produced by showing the effervescence and fizzing behavior.
Hence, option (2) is correct.
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Answer:
B
Explanation:
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Which ecosystem is more likely to become unstable one with many kinds of plants and animals or one with few kinds?
Answer:
One with a few kinds is more likely to become unstable.
Explanation:
A lack of biodiversity means there is a lower chance of them having traits that enable them to adapt to a changing environment. A lack of biodiversity is usually caused by humans. It could be the result of habitat loss, invasive species, overexploitation, pollution, or climate change.
Draw the structure of the major organic product(s) of the reaction. Grinard's
Answer:
There is drawing of the major organic product of reaction
Help ASAP!!! I need it now i have to write similar test tmrw
Answer and explanation:
(c)
A represents the activation energy (the minimum amount of energy needed to start a reaction).
B represents the overall change in energy (the difference between the energy of the reactants and products).
(d)
The reaction profile diagram shows that the reaction is exothermic because the energy change is negative (the products have less energy than the reactants) which shows that energy is lost or given out to the surroundings.
(e)
HCl gas doesn't conduct electricity, but hydrochloric acid does because in HCl, there are hydrogen ions that are free to move so they can carry a charge.
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What is the difference between an endothermic and an exothermic reaction?
A student adds 0. 0030 mol of hcl to 100 ml of a 0. 10 m solution of a r2nh, a weak base. The ph of the solution is found to be 11. 10
Since an acidic salt solution is produced when a strong acid neutralizes a weak base, the pH of the salt solution formed when HCl is added to R2NH will be less than 7.
What is a neutralization reaction?A neutralization reaction is the react ion between an acid and a base to form salt and water only.
Neutralization reactions can either produce a neutral solution, an acidic solution or an alkaline solution at equivalence point.
When a strong acid is added to a weak base, the pH of the salt solution formed will be less than 7.
Therefore, the pH of the salt solution formed when HCl is added to R2NH will be less than 7.
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What’s an example of a single displacement reaction in everyday life
Answer:
Any time a simple metal reacts with an acid it is a single displacement reaction.
Explanation:
Calculate the volume that 2.25 mol of o2(g) will occupy at stp.
Explanation:
[tex]2.25mol \times \frac{22.4lit}{1mol} = 50.4 lit o2 [/tex]
Which statement best describes the law of conservation of mass? (1 point)
O Chemical symbols are used to show atom balance before and after a reaction.
O Matter cannot be created or destroyed in a chemical reaction.
O Reactants and products cannot escape from a closed system
• Reactants in a chemical reaction rearrange to form a new substance or substances.
Matter cannot be created or destroyed in a chemical reaction best describe law of conservation of mass.
What is law of conservation of mass?The law of conservation of mass states that for any system closed Mass can neither be created not destroy. the mass of the system must remain constant over time,.
Therefore, Matter cannot be created or destroyed in a chemical reaction best describe law of conservation of mass.
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what do you get when you mix H2O And Co3987b2
Answer:Potassium metal reacts very rapidly with water to form a colourless solution of potassium hydroxide (KOH) and hydrogen gas (H2). The resulting solution is basic because of the dissolved hydroxide. The reaction is exothermic.
Explanation:
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According to Robert Boyle, which of the following is not an acid’s property?
a) turns blue Litmus red
b) sour in taste
c) neutralize bases
d) bitter in taste
Answer:
Bitter in taste
Explanation:
Acids according to Robert Boyle taste sour not bitter.
They are corrosiveThey can act as neutralize basesAccording to Robert Boyle, the option which is not an acid’s property include the following: d) bitter in taste.
What is an acidic solution?In Chemistry, an acidic solution can be defined as a type of aqueous solution that has a high concentration of hydrogen ions (H⁺), which is typically greater than that of pure water.
According to Robert Boyle, the properties of acids include the following:
They turn a blue Litmus paper red.
They are corrosive
They can act as neutralize bases.
They are sour in taste
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Consider the reaction 2NaN3 → 2Na + 3N2, which is the first reaction that occurs when an air bag expands in a car undergoing a collision. This reaction happens very quickly, as you might suspect.
A graph showing the amount of nitrogen gas (N2) could be best described as which sentence?
A.) The graph line’s general trend is decreasing from left to right.
B.) The graph line’s general trend is absolutely horizontal.
C.) The graph line’s general trend is nearly horizontal.
D.) The graph line’s general trend is increasing from left to right.
Answer:
D) The Graph line’s general trend is increasing from left to right.
Explanation:
N2, a product, will increase over time which means the line of the graph would go up over time. Time increases from left to right so the correct answer is D.
The graph that describes the reaction will have a trend in which the graph is decreasing from left to right.
What is a collision?A collision occurs when two particle bump into each other. We know that a reaction takes place when there is an effective collision between the reacting particles.
In this case, the graph that describes the reaction will have a trend in which the graph is decreasing from left to right.
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What phase does chloride occur in?
Answer:
solid
Explanation:
chlorine is liquid
What is required for a steady state reaction that is not required for an equilibrium reaction?.
Answer:
any thing going on within the organism its self- and is not unatural
Explanation:
Devise a two‑step synthesis of the alkene from the ketone using the reagents provided
We can convert ketones to alkenes by the use of;
1)B2H6 in THF
2) H2O2/NaOH
What is a ketone?A ketone is a compound of the sort RCO. The compound contains a carbon - oxygen double bond. The ketone can be used in the synthesis of an alkene. The question is incomplete hence I can only give a general answer.
The reaction involves the following reagents;
1)B2H6 in THF
2) H2O2/NaOH
When these two reagents are applied any ketone can be converted to an alkene.
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The two-step synthesis of the alkene from the ketone using the reagents provided is
Step1: B₂H₆ in THF.
Step2: H₂O₂ / NaOH
What is alkene?An alkene is a hydrocarbon compound containing double bonds between carbons.
The process of making alkenes from ketones or aldehyde is called the witting reaction or witting olefination.
Thus, the two-step synthesis of the alkene from the ketone using the reagents provided is
Step1: B₂H₆ in THF.
Step2: H₂O₂ / NaOH
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Which of the following compounds would be expected to have the strongest ionic bonds?
the compound that has the largest ions with the greatest charge
the compound that has the largest ions with the least charge
the compound that has the smallest ions with the greatest charge
the compound that has the smallest ions with the least charge
Answer:
the compound that has the smallest ions with the greatest charge
The compound that has the smallest ions with the greatest charge will have the strongest ionic bonds. Therefore, option C is correct.
What are ionic compounds?Ionic compounds can be defined as solids formed by closely packed ions of opposite charge. An Ionic compound is commonly formed when metal combines with non-metal.
In ionic compounds, the ions are held together by ionic bonds. The ions are created by accepting or losing electrons in order to get their nearest noble gas configuration. In a reaction, the metals have a tendency to lose electrons to complete their octet while non-metals will gain electrons to fill their octet.
An ionic bond or electrovalent bond is a type of linkage generated from the electrostatic attraction between oppositely charged ions. Such a bond produces when the valence electrons of one atom are transferred permanently to another.
The more the charge on the ions and the smaller the ions stronger the ionic bond will be formed.
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