The general fomula of the amine group ought to be R2NH because, the two hydrogen atoms of ammonia have been substituted by alkyl groups.
What is a secondary amine?A secondary amine is one in which two alkyl groups are subtituted on the nitrohen atom of ammonia.
This implies that the general fomula of the amine group ought to be R2NH. This is because, the two hydrogen atoms of ammonia have been substituted by alkyl groups.
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Answer:
D
Explanation:
Consider the following compounds: H2S, H2Se, H2Te. The molecule with the highest boiling point is _____, while the molecule with the highest vapor pressure is _____.
The molecule with the highest boiling point is H₂Te, while the molecule with the highest vapor pressure is H₂S.
What is the realation between boiling point and vapor pressure?Boiling point of any substnace is inverely proportional to its vapour pressure, and boilig point is directly proportional to the molecular mass of the substance.
In the given compounds H₂S, H₂Se and H₂Te molecular mass of Te is high and of Sulphur (S) is small. So the boiling point of H₂Te is highest and of H₂S is low so the vapor pressure of H₂S is highest.
Hence, H₂Te has the highest boiling point and H₂S has the highest vapor pressure.
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What is obtained when (S)-2-butanol is treated with tosyl chloride and pyridine, followed by exposure to bromide
When (S)-2-butanol is treated with tosyl chloride and pyridine, followed by exposure to bromide, (R)-2-bromobutane is formed.
What is inversion of configuration?A substance may undergo inversion of configuration during nucleophilic substitution when the leaving group is bulky such that attack must occcur at the reverse side.
Hence, when (S)-2-butanol is treated with tosyl chloride and pyridine, followed by exposure to bromide, (R)-2-bromobutane is formed.
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what happens to oysters if there are too many hydrogen ions in the ocean
What is one reaction that will form an arrhenius base?.
Answer:
An alkaline solution is another name for a solution that is basic. All alkali metals react readily with water to produce the metal hydroxide and hydrogen gas. The resulting solutions are basic.
An alkaline solution is another name for a solution that is base. All alkali metals react readily with water to produce the metal hydroxide and hydrogen gas. The resulting solutions are basic.
What is base?According to the Arrhenius concept, base is defined as a substance which yields hydroxyl ions on dissociation.These ions react with the hydrogen ions of acids to produce salt in an acid-base reaction.
Bases have a pH higher than seven as they yield hydroxyl ions on dissociation.They are soapy in touch and have a bitter taste.According to the Lowry-Bronsted concept, base is defined as a substance which accepts protons .Base react violently with acids to produce salts .Aqueous solutions of bases can be used to conduct electricity .They can also be used as indicators in acid-base titrations.
They are used in the manufacture of soaps,paper, bleaching powder.Calcium hydroxide ,a base is used to clean sulfur dioxide gas while magnesium hydroxide can be used as an antacid to cure acidity.
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Brain controls __________ and ________ activity
Answer:
Brain controls all body parts or processess like thinking and our movements or physical activity.
Explanation:
The control center of the body is the nervous system. It directs the other body systems. It controls, monitors, and coordinates all body parts and processes. It also receives information from the environment and makes specific body parts acts on that information. The nervous system is made up of brain, the spinal cord, and the nerves.
Hi brainly user! In the picture are the Parts of a brain. Actually, this is what I drew before ^^
Can someone please help me?
Answer: I don't know for sure but A and D seem like the best choices
Explanation:
6. Calculate the molarity of an aqueous sodium chloride solution containing 284 g of NaCl in 2.20 L of solution. Calculate the molarity of the chloride in the solution.
The molarity of sodium chloride solution containing 284 g of NaCl in 2.20 L os solution would be 2.21 mole/Liter
MolarityRecall that:
Molarity = mole/volume
Also, Mole = mass/molar mass
Thus:
Mole of 284 g NaCl = 284/58.44 = 4.86 moles
Volume of the solution = 2.20 L
Therefore, the molarity of the solution can be calculated as;
molarity = 4.86/2.20 = 2.21 mole/Liter
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i need help now!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answer:
C
Explanation:
Remark
You have to take into account what the brackets mean. They enclose a complex ion. So (SO4)3 means that you multiply the number of atoms inside the brackets by the number on the right.
Sulphur for example has a 1 after it, but the 3 on the outside multiplies the 1 by 3.
Oxygen has 4 after it. So the number of oxygens is 4*3 = 12
Givens
Blue = Aluminumyellow = sulphurgreen = oxygenAnswer
Blue = 2
Yellow = 3
Green = 12
C
What are renewable resources?
They are resources that are in limited supply, but they can replenish themselves quickly.
They are resources that are in abundant supply and can replenish themselves quickly.
They are resources that are in limited supply and that take a long time to create.
They are resources that are in abundant supply but take a long time to create.
Answer:
B: They are resources that are in abundant supply and can replenish themselves quickly.
Explanation:
A renewable resource is one that can be used repeatedly and does not run out because it is naturally replaced. Examples of renewable resources include solar, wind, hydro, geothermal, and biomass energy.
Which of the following properties of an object can change when a substance undergoes a physical change?
Color
Odor
Reactivity
Size
PLS HELPPPP
Answer:
color , odor , size ( all the options except for reactivity )
Explanation:
A physical change involves a change in physical properties. Examples of physical properties include melting, transition to a gas, change of strength, change of durability, changes to crystal form, textural change, shape, size, color, volume and density.
What thermodynamic quantities are used to define Gibbs free energy?
5 litres of 1m HCL is mixed with 2 litres of 1 m NaOH solution. Calculate the strength of the salt formed
Based on the molarity or molar concentration of the salt solution formed, the strength of the salt formed is 0.286 M.
What is salt strength of a solution?Salt strength of a solution is the concentration of that salt in a given volume of solution.
The concentration is given as the moles of the salt in a given volume of solution or molarity.
The moles of salt, NaCl formed when 5 litres of 1 M HCL is mixed with 2 litres of 1 M NaOH solution is given below:
1 mole of HCl reacts with 1 mole of NaOH to form 1 mole of NaCl.
2 litres of 1 M NaOH will react with 2 litres of 1 M HCl to form 2 litres of 1 M NaCl.
Moles of NaCl in 2 litres of 1 M solution = 2 × 1 = 2 moles of NaCl.
Total volume of mixture = 7 L
Molarity of NaCl = 2 moles / 7 litres= 0.286 M
Therefore, the strength of the salt formed is 0.286 M.
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Which most closely represents the structure of an element?
A. silver beads
B silver and gold beads
C. gold beads and ornaments
D. silver and gold beads and ornaments
Answer:
C. gold beads and ornaments
Explanation:
help me with this plssss
Answer:
5=D
6=B
7=A
8=?????
1A= conduction
1B= radiation
1C= convection
3: C
4: A
Explanation:
2: The heat from the hot water is been transferred along the metal handle to the other end of the spoon by the process of CONDUCTION.
which sublevel would have electrons with the highest energy? A) 5s B) 4s C) 4d D) 4p
The sublevel would have electrons with the highest energy is 4p. Therefore, option D is correct.
What is an electron ?The elementary electric charge of the electron is a negative one, making it a subatomic particle. Due to their lack of components or substructure, electrons, which are part of the lepton particle family's first generation, are typically regarded to be elementary particles.
The smallest elemental component of an atom, the electron has a negative charge. In a neutral atom, there are an equal number of protons and electrons. One electron and one proton are all that the hydrogen atom has.
The words electric and ion are combined to form the word electron. In turn, electron is derived from the suffix -on, which is currently used to describe other subatomic particles, such as a proton or neutron.
Thus, option D is correct.
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I need to solve this quickly!
Answer:
to create or make energy Storage molecules
Can someone please help me? :((
Answer:
I belive its d, not fully sure tho
Assume that adhesin gene of Neisseria gonorrhoeae, the pathogen that causes gonorrhea, were mutated. What is the most likely effect that this would have on the pathogen?
the pathogen will be unable to produce toxins.
the pathogen will be unable to attach to host cells
the pathogen will be unable to replicate
the pathoger
will be unable to gain entry into the host.
When the adhesin gene of Neisseria gonorrhoeae were mutated, the pathogen will be unable to attach to the host cells.
What do you mean by Pathogens?Pathogens may be defined as disease-causing agents. These are mostly microorganisms that infect the body of animals as well as humans.
Adhesin gene plays a very vital role in the attachment of pathogens to the host cells. It is the site where pathogen attack and attaches to host cells and then enters the body to play their function i.e. replication, a decline in the host immune system, and finally disease caused.
Therefore, when the adhesin gene of Neisseria gonorrhoeae were mutated, the pathogen will be unable to attach to the host cells.
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An -ate or -ite at the end of a compound name usually indicates that the compound contains
Answer:
Your answer would be "Polyatomic anions."
I ask that you search to ensure there is not a similar question as it would save you time.
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An ideal gas has a volume of 18.25 L at a temperature of 15.9 °C. The temperature of the gas is raised to 40.7 °C while the number of moles and the pressure of the gas are kept constant. What is the new volume of the gas (in L)?
B: An ideal gas has a volume of 10.8 L at a temperature of 25.0 °C and a pressure of 60 atm. The pressure of the gas is reduced to 370.0 mmHg, but the temperature and number of moles of the gas are kept constant. What is the new volume of the gas (in L)?
Answer:
V₂ = V₁ / T₁ * T₂ . If you prefer to set the final volume and want to estimate the resulting temperature, then the equation of Charles' law changes to: T2=T1/T1 multiplied by v^2.
Saturated and Unsaturated Solutions Is there a limit to the amount of solute that will dissolve in a solvent? We use solutions every day. People who wear contact lenses use "lens solution" to rinse their contacts and keep them wet. Athletes who consume sports drinks after exercising benefit from the electrolytes in those solutions. This activity will explore whether or not there is a limit to how much of one substance can dis- solve in another
Answer:
Explanation:
Define Exothermic and Endothermic reaction.
Which best describes why a liquid needs a container when a solid does not?
Solids fill their containers, and liquids have definite shapes.
Solids have definite shapes, and liquids fill their containers.
Solids particles will expand to fill their containers, and liquid particles will expand as well.
Solids particles expand to fill their containers, and liquid particles do not.
Answer:
The second option
Explanation:
The process of elimiation.
1. We know liquids dont have a definite shape, they will morph into whatever enviroment theyre in
3. Solids dont expand based on what container theyre in, they either dont fit or they do
4. We know that liquid expands, so we can also rule this one out.
Which leaves us with option 2 to be correct.
Challenge Air is a mixture of gases. By percentage, it is roughly 78 percent nitrogen, 21 percent oxygen, and 1 percent argon. (There are trace amounts of many other gases in air. If the atmospheric pressure is 760 mmHg, what are the partial pressures of nitrogen, oxygen, and argon in the atmosphere?
The partial pressures of gases in air at 760 mmHg are N₂ (592.8 mmHg), O₂ (159.6 mmHg) and Ar (7.6 mmHg).
What is partial pressure?Partial pressure is the pressure of a gas in a mixture of gases.
Air is a mixture of gases with 78% N₂, 21% O₂, 1% Ar and other gases in trace amounts. The partial pressure of a gas is proportional to its percentage.
Let's calculate the partial pressures of these gases, considering that the atmospheric pressure is 760 mmHg.
pN₂ = 760 mmHg × 78% = 592.8 mmHg
pO₂ = 760 mmHg × 21% = 159.6 mmHg
pAr = 760 mmHg × 1% = 7.6 mmHg
The partial pressures of gases in air at 760 mmHg are N₂ (592.8 mmHg), O₂ (159.6 mmHg) and Ar (7.6 mmHg).
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how many OWLS are 4 desks?
Answer:
8
Explanation:
becus it just how that is ok kidhdod
Predict the neutral organic product of the reaction of cycloheptene with water and sulfuric acid.
The term hydration of an alkene is defined as the addition of water across a double bond.
What is hydration?The term hydration of an alkene is defined as the addition of water across a double bond. The process of hydration always yields an alcohol as -OH is aded to one of the carbon atoms in the doube bond.
The reaction commences with the attack of the -OH group by water and is completed by a proton from acid. The neutral organic product of the reaction of cycloheptene with water and sulfuric acid is shown in the image attached.
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The reason for the concentration of smelters, refineries, and foundries close to northern Belgium's copper mines is that copper production is:
There is a concentration of smelters, refineries, and foundries close to northern Belgium's copper mines because copper production is a bulk-reducing industry.
What is a bulk-reducing industry?A bulk-reducing industry can be defined as a type of industry in which the raw materials (inputs) that are used for production weighs more than the finished good or final product.
This ultimately implies that, a bulk-reducing industry such as copper mines are established close to smelters, refineries, and foundries because they make use of raw materials that weigh more than the finished good or final product.
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Question 16 of 25
When the maximum amount of solid is dissolved in a solute, what kind of
solution is it?
2) What is the change in enthalpy when 3.400 moles of aluminum react with excess ammonium nitrate (NH4NO3)
according to the equation? Is the reaction exothermic or endothermic?
2AI + 3NHANO3 → 3N2+ 6 H2O + Al2O3
AH = -2030kJ
Answer: See below
Explanation:
(i) 2AI + 3 NHANO3 → 3 N2+ 6 H2O + Al2O3 ΔH = -2030kJ
From stoichiometric coefiicients, it can be seen that:
When 2 moles of Al react, change in enthalpy = -2030kJ
So, when 3.4 moles of Al react, change in enthalpy = -(2030/2) x 3.4 kJ = -3451 kJ
Therefore, the change in enthalpy is -3451 kJ
(ii) The change in enthalpy is negative. This means heat is released during the reaction.
So the reaction is exothermic
The enthalpy change with the reaction of 3.4 moles of aluminum in the reaction is -3045 kJ. The reaction is exothermic in nature.
What is an exothermic and endothermic reaction?The reaction in which the energy is released and the value of change in enthalpy is negative is an exothermic reaction. The reaction in which the energy is absorbed with the positive value of change in enthalpy.
For a balanced chemical reaction, for 2 moles of Aluminum reaction, the change in enthalpy has been -2030 kJ. The change in enthalpy for the reaction of 3.4 moles of aluminum is given as:
[tex]\rm 2\;mol\;Al=-2030 \;kJ\\\\3.4\;mol\;Al=\dfrac{-2030}{2}\;\times\;3\;kJ\\\\ 3.4\;mol\;Al=-3045\;kJ[/tex]
The change in enthalpy for 3.4 moles of aluminum reaction is -3045 kJ. The reaction is exothermic in nature.
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The bond length of a covalent bond is the distance between the nuclei of two bonded atoms. The larger the atoms, the _____ this distance will be. Bond length therefore _____ as atomic size decreases.
Answer:
Bonding;lone
Explanation: