Answer:
Fire
Explanation:
Which of the following is an educated guess?
O Inference
O Observation
O Hypothesis
O Quantitative
What is the mass of 4.5 moles of sodium fluoride?
This compound is treated with two different oxidizing reagents: either H2CrO4 and H2SO4, or with PCC. Draw the major organic product for each of the oxidation reactions. Do not draw inorganic by-products.
Answer:
See explanation and image attached
Explanation:
We were told that one of two different oxidizing agents were used H2CrO4 and H2SO4 or PCC/CH2Cl2.
Now, we must know that when we use H2CrO4 and H2SO4, primary alcohols are converted to aldehydes and then to carboxylic acids while secondary alcohols are converted to ketones.
When we use PCC/CH2Cl2 primary alcohols are converted to aldehydes and does not move further to convert to carboxylic acids while secondary alcohols are converted to ketones.
Recall that tertiary alcohols are not oxidized at all.
In the Fischer esterification reaction, a carboxylic acid reacts with an excess of alcohol in acidic conditions to form an ester. During the reaction the sp2sp2 hybridized carbonyl carbon of the acid forms an sp3sp3 hybridized intermediate before returning to sp2sp2 hybridization in the product. Draw the structure of the neutral sp3sp3 hybridized intermediate and the ester product in the reaction between pentanoic acid and n‑propanol.
Answer:
See explanation and image attached
Explanation:
Esterification is a reaction of an alkanol and an alkanoic acid to yield an ester and water as products. It is analogous to inorganic neutralization reaction.
The process may be acid catalyzed. As mentioned in the question, the process of ester formation between pentanoic acid and n‑propanol first involves the carbonyl in going through an sp3 hybridized intermediate before returning to sp2 hybridized state in the product.
The image of the neutral form of this intermediate as well as the final structure of the ester are both shown in the image attached to this answer.
How many molecules of ammonia are contained in 10.4 moles of ammonia, NH3?
True or False: The ocean is an example of a carbon reservoir (carbon sink).
True
False
Answer:
A TRUEEEEEEEE
Explanation:
Analyze Between visits 1 and 7, what kind of ecological succession is shown? Explain your answer.
Answer:
Is there supposed to be a picture??
Explanation:
Intermolecular forces exist between what?
Answer:
Intramolecular forces are the forces that hold atoms together within a molecule. Intermolecular forces are forces that exist between molecules.
Explanation:
PLEASE HELP ME
How many grams of lithium are needed to produce 45 Og of lithium nitride, according to the following process? 6 Li(s) + N2(g) → 2 Li3N(s)
1. Making coffee or tea requires hot water to remove soluble components from the grounds or leaves. This is a separation process called extraction, removing a soluble component from solid material. What other separation technique is used to prepare the coffee or tea to drink
Answer:
The other technique which used to separate the coffee or tea is Filtration.
Filtration is a physical, biological or chemical operation that separates solid matter and fluid from a mixture with a filter medium that has a complex structure through which only the fluid can pass.
Solid particles that cannot pass through the filter medium are described as oversize and the fluid that passes through is called the filtrate.
Argon has three naturally-occurring isotopes: 99.6% of 40Ar, with an atomic weight of 39.9624 amu, 0.337% of 36Ar, with an atomic weight of 35.9676 amu, and 0.063% of 38Ar, with an atomic weight of 37.9627 amu. Calculate the average atomic weight of Ar. Round off the answer to six significant figures. Do not include the units.
Answer:
39.9477amu is the average atomic weight of Argon
Explanation:
The average atomic weight is defined as the sum of the products of the atomic weight of each isotope times its abundance. For the Argon the average atomic weight, X is:
[tex]X = 0.996*^{40}Ar + 0.00337*^{36}Ar+0.00063*^{38}Ar[/tex]
[tex]X = 0.996*39.9624amu + 0.00337*35.9676amu+0.00063*37.9627amu[/tex]
X = 39.9477amu is the average atomic weight of Argon
Use the information in the table to identify the metal
with a volume of 1.38 cm3.
O aluminum
O zinc
O chromium
O nickel
Answer:zinc
Explanation:
Perform each conversion
5.88 dL to liters
Answer:
5.88 dL = 0.588 litre
Explanation:
We need to find a conversion from 5.88 dL to liters.
We know that the conversion is as follows :
1 deciliter = 0.1 litre
To find 5.88 dL to liters, we use the unitary method. So,
5.88 dL= (0.1×5.88) litre
5.88 dL = 0.588 litre
So, there are 0.588 liters in 5.88 dL.
A certain reaction with an activation energy of 185 kJ/mol was run at 505 K and again at 525 K . What is the ratio of f at the higher temperature to f at the lower temperature
Answer:
The ratio of f at the higher temperature to f at the lower temperature is 5.356
Explanation:
Given;
activation energy, Ea = 185 kJ/mol = 185,000 J/mol
final temperature, T₂ = 525 K
initial temperature, T₁ = 505 k
Apply Arrhenius equation;
[tex]Log(\frac{f_2}{f_1} ) = \frac{E_a}{2.303 \times R} [\frac{1}{T_1} -\frac{1}{T_2} ][/tex]
Where;
[tex]\frac{f_2}{f_1}[/tex] is the ratio of f at the higher temperature to f at the lower temperature
R is gas constant = 8.314 J/mole.K
[tex]Log(\frac{f_2}{f_1} ) = \frac{E_a}{2.303 \times R} [\frac{1}{T_1} -\frac{1}{T_2} ]\\\\Log(\frac{f_2}{f_1} ) = \frac{185,000}{2.303 \times 8.314} [\frac{1}{505} -\frac{1}{525} ]\\\\Log(\frac{f_2}{f_1} ) = 0.7289\\\\\frac{f_2}{f_1} = 10^{0.7289}\\\\\frac{f_2}{f_1} = 5.356[/tex]
Therefore, the ratio of f at the higher temperature to f at the lower temperature is 5.356
What is the Molar Mass of Iron(Fe)? and also state how many particles there are in one mole of iron.
Why is nitro group called an ambident group?
Answer:
An ambident ("both teeth") group is a group that can attach to another by either of two atoms. A nitro group can bond through either N or O. In organic chemistry, this property gives rise to functional group isomers.
Explanation:
Explanation:
An ambident ("both teeth") group is a group that can attach to another by either of two atoms. A nitro group can bond through either N or O. In organic chemistry, this property gives rise to functional group isomers.
Hope this is fine for you☺️☺️☺️Using the equation below, how many liters of water can be made from 7.6 L of oxygen gas at STP?
Answer:
V = 15.2 L
Explanation:
STP means that T = 273 K and P = 1 atm.
We use the PV=nRT equation to convert the given liters of oxygen to moles:
1 atm * 7.6 L = n * 0.082 atm·L·mol⁻¹·K⁻¹ * 273 Kn = 0.340 molNow we convert O₂ moles to H₂O moles, using the stoichiometric coefficients of the equation:
0.340 mol O₂ * [tex]\frac{2molH_2O}{1molO_2}[/tex] = 0.68 mol H₂OFinally we use the PV=nRT equation once again to convert 0.68 moles of H₂O to liters:
1 atm * V = 0.68 * 0.082 atm·L·mol⁻¹·K⁻¹ * 273 KV = 15.2 LWhat is the value for the rate of constant, k(with units)?
Answer:
b
Explanation:
What's the pollen tube also known as
Answer:
The stigma.
Explanation:
You're welcome. :)
Please help asap! Brainliest to correct answer.
What is the volume of 2.1 moles of nitrogen gas at standard temperature and pressure (STP)?
Select one:
a. 11 L
b. 22 L
c. 47 L
d. 82 L
Answer:
47 L will be the volume STP
Explanation:
Need help I don’t understand this at all need to show my work and strategy it’s stoichiometry gram to gram please help
Answer:
781×10¯² g of MgCl₂.
Explanation:
The balanced equation for the reaction is given below:
Mg + 2HCl —> MgCl₂ + H₂
Next, we shall determine the mass of HCl that reacted and the mass of MgCl₂ produced from the balanced equation. This is illustrated below:
Molar mass of HCl = 1 + 35.5
= 36.5 g/mol
Mass of HCl from the balanced equation = 2 × 36.5 = 73 g
Molar mass of MgCl₂ = 24 + (35.5×2)
= 24 + 71
= 95 g/mol
Mass of MgCl₂ from the balanced equation = 1 × 95 = 95 g
SUMMARY:
From the balanced equation above,
73 g of HCl reacted to produce 95 g of MgCl₂.
Finally, we shall determine the mass of MgCl₂ produced by the reaction of 6 g of HCl. This can be obtained as follow:
From the balanced equation above,
73 g of HCl reacted to produce 95 g of MgCl₂.
Therefore, 6 g of HCl will react to produce = (6 × 95)/73 = 781×10¯² g of MgCl₂.
Thus, 781×10¯² g of MgCl₂ were obtained from the reaction.
Elements with the same number of electron shells are in the same
Answer:
Elements with the same number of electrons in their outermost shell show similar chemical properties. Example 1: Fluorine, chlorine, bromine, and iodine each have 7 electrons in their outermost shell. These so-called halogens are also quite similar in their chemical behavior.
HELP!!!!!....... Iron oxide reacts with carbon monoxide to produce iron and carbon dioxide, with the balanced chemical equation Fe2O3 + 3CO —> 2Fe + 3CO2. What does this tell you about the relative amounts of iron oxide and iron consumed and produced in this equation?
A. For every two moles of iron oxide consumed, one mole of iron is produced,
B. For every two grams of iron oxide consumed, one gram of iron is produced.
C. For every gram of iron oxide consumed, two grams of iron are produced
D. For every mole of iron oxide consumed, two moles of iron are produced.
Answer:D
Explanation: There is one mole of Iron Oxide on the reactants side(left) and two moles of iron on the products side (right).
Students pour some table salt into a beaker with distilled water to make a solution in order to test its conductivity. When they placed a conductivity probe in the salt water solution, it measured a high conductivity. The students repeated the same procedure with white sugar and measured no conductivity. Which of the following statements best explains why sugar is not conductive in solution?
Answer:
the answer is Covalent compounds separate into neutral molecules when they dissolve in water.
Explanation: covalent doesn’t conduct electricity in water
The common salt transforms the distilled water into an electrical conductor. But sugar molecule is a covalent compound which dissolve in water. So the white sugar does not show any conductivity.
What are conductors?The electrical conductors are defined as the materials which allow electricity to flow through them easily. The property of conductors which allow them to conduct electricity is defined as the conductivity. The metals are good conductors of electricity.
The distilled water does not contain any contaminants and it is incapable of conducting even very minute amount of electricity. But during the addition of ordinary salt or sodium chloride to the distilled water, it becomes electrically conductible.
The presence of chlorine and sodium ions makes the distilled water to conduct electricity. Here sugar is a covalent compound which separate into neutral molecules when they dissolve in water. So covalent compounds does not conduct electricity.
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What is the formula for tin (II) nitrite?
Answer:
tin nitrite Formula:Sn(NO2)2
The formula for tin (II) nitrite Sn(NO2)2.
What is Molecular formula?Two atoms together chemically form a molecule. The chemical formula for a molecular compound's molecular formula lists the variety of atoms that make up the molecule.
A subscript under oxygen in CO2, for instance, indicates that there are two oxygen atoms present, but a subscript under carbon indicates that there is just one carbon atom present.
A nitronium salt is produced when tin(IV) nitrate and trifluoroacetic acid anhydride combine. Trifluoroacetic acid produces a similar molecule when it is solvated with it.
The number of each atom contained in a given molecule is indicated by the molecule's molecular formula. In essence, it is a list of the elements that are present in a molecule and how many of each there are.
Therefore, The formula for tin (II) nitrite Sn(NO2)2.
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Select the correct answer
Which hand is negatively charged?
Option B is the correct answer .
What is Charge ?
Charge is a basic property of matter that is associated with the presence or absence of electrons. Objects can have positive or negative charge, or they can be neutral, which means they have an equal number of positive and negative charges. In physics, charge is one of the fundamental concepts used to explain the behavior of matter and energy in the universe. The interaction between charges is described by Coulomb's law, which states that the force between two charges is proportional to the product of their charges and inversely proportional to the square of the distance between them.
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A chemist working as a safety inspector finds an unmarked bottle in a lab cabinet. A note on the door of the cabinet says the cabinet is used to store bottles of pentane, ethanolamine, diethylamine, glycerol, and carbon tetrachloride. The chemist plans to try to identify the unknown liquid by measuring the density and comparing to known densities. First, from his collection of Material Safety Data Sheets (MSDS), the chemist finds the following information: liquid density pentane 0.63gmL, ethanolamine 1.0gmL, diethylamine 0.71gmL, glycerol 1.3gmL, carbon tetrachloride 1.6gmL Next, the chemist measures the volume of the unknown liquid as 1737.cm3 and the mass of the unknown liquid as 1.23kg . Calculate the density of the liquid. Be sure your answer has the correct number of significant digits.
Answer:
0.71 g/mL
The liquid is diethylamine
Explanation:
Mass of the liquid = 1.23 kg of 1.23 * 10^3 g
Volume of the liquid = 1737.cm3
Let us remember that density is obtained as;
Density= mass/volume
Density= 1.23 * 10^3 g/1737cm^3
Density= 0.71 g/cm^3
Since we know that 1 mL=1 cm3 . So, 1 g/mL=1 g/cm3
So we can also write;
Density= 0.71 g/mL
The liquid is diethylamine
Butane gas reacts with oxygen gas to give carbon dioxide gas and water vapor (gas). If you mix butane and oxygen in the correct stoichiometric ratio, and if the total pressure of the mixture is 392 mmHg, what is the pressure (in mmHg) of water vapor after the reaction has completed (temperature and volume do not change).
Answer:
118.776 mmHg
Explanation:
The equation of the reaction is;
C4H10(g) + 13/2 O2(g) ------> 4CO2(g) + 5H20(g)
Now the mole ratio according to the balanced reaction equation is;
1 : 6.5 : 4 : 5
Hence, the total number of moles present = 1 + 6.5 + 4 + 5 = 16.5 moles
Mole fraction of water vapour = 5/16.5 = 0.303
We also know that;
Partial pressure= mole fraction * total pressure
Partial pressure of H20(g) = 0.303 * 392 mmHg = 118.776 mmHg
The pressure (in mmHg) of water vapor is 118.78 mmHg
Balanced equation for the reaction
Butane reacts with oxygen according to the following equation
2C₄H₁₀ + 13O₂ —> 8CO₂ + 10H₂O
How to determine the mole fraction of water Mole of butane = 2 moles Mole of oxygen = 13 molesCarbon (IV) oxide = 8 moles Mole of water = 10 moles Total moles = 2 + 13 + 8 + 10 = 33 moles Mole fraction of water =?Mole fraction = mole / total mole
Mole fraction of water = 10 / 33
Mole fraction of water = 0.303
How to determine the partial pressure of waterMole fraction of water = 0.303Total pressure = 392 mmHgPartial pressure of water =?Partial pressure = mole fraction × total pressure
Partial pressure of water = 0.303 × 392
Partial pressure of water = 118.78 mmHg
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If it takes 3.5 hours for the Hogwarts Express, moving at a speed of 120 mi/hr, to it make it from Platform
9 and ¾ to Hogwarts, how far apart are they?
Answer:
3/4 miles
Expanation:Because 9+3/4 is 3/4 miles
If AB = 5 inches and AD = 8, find BD. Round to the nearest tenth if necessary.
WILL GIVE BRAINLIEST
Answer:
6.5
Explanation:
half of 5 is 2.5, half of 8 is 4. 2.5+4=6.5
:)