Answer:
C
Explanation:
Answer:
c
Explanation:
I think it is c because the tep. will change and the volume will change.
A self-aldol or crossed aldol reaction REQUIRES a(n) ___________________. Group of answer choices strong acid only a very, very strong base, such as LDA (lithium diisopropyl amide), NaOH or LiOH won't work acid catalyst a strong base such as LiOH or NaOH
Answer:
[tex]\mathbf{a \ strong \ base \ such \ as\ LiOH \ or \ NaOH.}[/tex]
Explanation:
In the condensation reactions of carbonyl compounds, it is essential to establish the order of events in advance to minimize or suppress the possibilities of self-condensation and the occurrence of cross-condensation, which unfortunately are an obvious threat in these reactions.
Self-condensation:
Any carbonyl compound that has one or more alpha hydrogens, on the carbons adjacent to the carbonyl group, runs the risk of undergoing a self-condensation reaction if the corresponding rigor is not carried out.
Cross-condensation:
Ideally, in the condensation reactions of carbonyl compounds, one of the reacting molecules should quickly enolise, while the other preferably should not have Hα, to ensure that no other by-products are formed.
[tex]\text{To achieve this process;}[/tex] [tex]\text{A self-aldol or crossed aldol requires a strong base such as LiOH or NaOH.}[/tex]
Strawberries contain about 15 wt% solids and 85 wt% water. To make strawberry jam, crushed strawberries and sugar are mixed in a 45:55 mass ratio, and the mixture is heated to evaporate water until the residue contains one-third water by mass.
a) Draw and label a flowchart of this process.
b) Do the degree-of-freedom analysis and show that the system has zero degrees of freedom (i.e., the number of unknown process variables equals the number of equations relating them). If you have too many unknowns, think about what you might have forgotten to do.
c) Calculate how many pounds of strawberries are needed to make a pound of jam.
d) Making a pound of jam is something you could accomplish in your own kitchen (or maybe even a dorm room). However, a typical manufacturing line for jam might produce 1500 \mathrm{lb}_{\mathrm{m}} / \mathrm{h}. List technical and economic factors you would have to take into account as you scaled up this process from your kitchen to a commercial operation.
Answer:
A. The flow diagram is in the attachment
B. Degree of freedom = 0
C. 0.486
D. Energy, power, cost of production
Explanation:
1/3 of water = 0.3333
Sugar = 1-1/3 = 2/3
B.) 45/55 = 9/11 when divided by 5
m1/m2 = 9/11
Cross multiply and make m1 subject of the formula
m1/m2 = 0.818
m1 = 0.818m2 ----1
0.15m1 + m2 = 1 x 0.667
0.15m1 + m2 = 0.667
0.15(0.818m2) = 0.667
1.1227m2 = 0.667
M2 = 0.5941
We put value of m2 in equation 1
M1 = 0.818 x 0.5941
M1 = 0.486
So 0.486 pound of strawberry is what we need in order to make 1 pound of jam.
D. We need great heat for water evaporation
The technical and economic factors would be
1. Energy which is power consumption
2. Cost of production for equipments and materials
3. Power
4. And hazards
Help pleaseeeeeee
Using your knowledge of alpha beta and Gamma decay and your periodic table practice using your ideas by completing the following equations
Answer:
20. ²⁴¹₉₅Am —> ²³⁷₉₃Np + ⁴₂He
21. ⁴²₁₉K —> ⁰₋₁β + ⁴²₂₀Ca
Explanation:
20. ²⁴¹₉₅Am —> __ + ⁴₂He
Let ⁿₘX be the unknown.
Thus, the equation becomes:
²⁴¹₉₅Am —> ⁿₘX + ⁴₂He
Next, we shall determine n, m and X. This can be obtained as follow:
241 = n + 4
Collect like terms
n = 241 – 4
n = 237
95 = m + 2
Collect like terms
m = 95 – 2
m = 93
Thus,
ⁿₘX => ²³⁷₉₃X => ²³⁷₉₃Np
Therefore, the complete equation is:
²⁴¹₉₅Am —> ²³⁷₉₃Np + ⁴₂He
21. __ —> ⁰₋₁β + ⁴²₂₀Ca
Let ʸₓZ be the unknown.
Thus, the equation becomes:
ʸₓZ —> ⁰₋₁β + ⁴²₂₀Ca
Next, we shall determine y, x and Z. This can be obtained as follow:
y = 0 + 42
y = 42
x = –1 + 20
x = 19
Thus,
ʸₓZ => ⁴²₁₉Z => ⁴²₁₉K
Therefore, the complete equation is:
⁴²₁₉K —> ⁰₋₁β + ⁴²₂₀Ca
in the ideal gas law which variable represents the gas constant?
a: T
b: R
c: n
d: V
e: P
Explanation:
It is represented using the ideal gas equation , or PV = nRT, where P is the pressure in atmospheres, V is the volume in liters, n represents the quantity of particles in the container, T represents the temperature in Kelvin, and R is the ideal gas constant equal to 0.0821 liters atmospheres per moles Kelvin.
You can calculate distance from work and force with the equation
Answer:
Summary. Work can be calculated with the equation: Work = Force × Distance. The SI unit for work is the joule (J), or Newton • meter (N • m).
Explanation:
Hope it helps! Correct me if I am wrong :>
Can you please mark me as brainlest?
Distance is the measure of how far or near an object is placed. It can be referred to as the length between the two points. The distance can be calculated by the formula, [tex]\rm Work = Force \times Distance.[/tex]
What are work and force?Work is the amount of force or energy required by the system to move the thing or the object from its original position to another. It is estimated in joules.
Force is the strength or the power required by the object to change its motion. It is calculated in Newtons.
The distance can be measured by using the work and the force applied by the object to move from initial to the final position as,
[tex]\rm Work = Force \times Distance[/tex]
Therefore, distance can be calculated by work and force.
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What is the empirical formula of C20H40
Answer:
CH2
Explanation:
The empirical formula gives the lowest whole number ratio of the elements. In this case, both subscripts can be divided by 20, hence CH2.
A 20.0 L container at 303 K holds a mixture of two gases with a total pressure of 5.00 atm. If there are 2.00 mol of Gas A in the mixture, how many moles of Gas B are present?
A 1.250-g sample of benzoic acid, C7H6O2, was placed in a combustion bomb. The bomb was filled with an excess of oxygen at high pressure, sealed, and immersed in a pail of water which served as a calorimeter. The heat capacity of the entire apparatus (bomb, pail, thermometer, and water) was found to be 10.134 kJ/K. The oxidation of the benzoic acid was triggered by passing an electric spark through the sample. After complete combustion, the thermometer immersed in the water registered a temperature 3.256 K greater than before the combustion. What is DEcombustion per mole of benzoic acid burned
Answer:
3224 kJ/mol
Explanation:
The combustion of benzoic acid occurs as follows:
C₇H₆O₂ + 13/2O₂ → 7CO₂ + 3H₂O + dE
The change in temperature in the reaction is the change due the energy released, that is:
3.256K * (10.134kJ / K) = 33.00kJ are released when 1.250g reacts
To find the heat released per mole we have to find the moles of benzoic acid:
Moles benzoic acid -Molar mass: 122.12g/mol-:
1.250g * (1mol / 122.12g) = 0.0102 moles
The dE combustion per mole of benzoic acid is:
33.00kJ / 0.0102moles =
3224 kJ/mol
How many moles of aluminum are needed to react with 12 moles of hydrochloric
acid
HELP PLS! I NEED TO GET THIS RIGHT! Curious Carl and his lab partner were conducting a variety of experiments to produce gases: hydrogen, oxygen, and carbon dioxide. In one experiment, they added a piece of magnesium ribbon to 10 milliliters of hydrochloric acid. They observed bubbles being produced and did a variety of tests to identify the escaping gas; it proved to be hydrogen The reaction is represented by the following equation:
Mg + 2HCL -> MgCL2 + H2(g)
Assuming STP, how many moles of hydrogen gas did Carl and his partner collect if they collected 5.6L?
Answer:
0.25 mole of H₂
Explanation:
The equation for the reaction is given below:
Mg + 2HCl —> MgCl₂ + H₂
From the question given above, we were told that the reaction produced 5.6 L of H₂.
Thus, we can obtain obtain the number of mole of H₂ that occupied 5.6 L at STP as follow:
1 mole of H₂ occupied 22.4 L at STP.
Therefore, Xmol of H₂ will occupy 5.6 L at STP i.e
Xmol of H₂ = 5.6 / 22.4
Xmol of H₂ = 0.25 mole
Therefore, 0.25 mole of H₂ were obtained from the reaction.
A .60 L sample of nitrogen is heated from 27℃ to 77℃ at a constant pressure. What is the final volume of the gas?
(show work please)
Answer:
CHARLES' LAW
given:
= 600 mL = 0.6 L
= 27 °C = 300.15 L
= 77 °C = 350.15 L
conversion:
= 600 mL (1 L / 1000 mL)
= 0.6 L
= 27 °C + 273.15 K
= 300.15 K
= 77 °C + 273.15 K
= 350.15 K
solution:
= ( × ) ÷
= (0.6 L × 350.15 K) ÷ 300.15 K
= 0.7 L
______ have no definite shape, but definite volume
A. solids
B. liquids
C. gases
D. plasmas
Answer:
liquids
Explaination:
The rate at which the plates move apart ______
Answer:
one to two inches (three to five centimeters) per year.
Explanation:
Answer:
1 to 2 inches (3 to 5 centimeters) per year
Explanation:
It depends on what plates your talking about, but in general, they move apart anywhere from 1 to 2 inches (3 to 5 centimeters) per year.
Specifically, though, The Arctic Ridge has the slowest rate (less than 2.5 cm/yr), and the East Pacific Rise near Easter Island, in the South Pacific about 3,400 km west of Chile, has the fastest rate (more than 15 cm/yr).
300.0 mL of a gas is at a pressure of 5.00 atm. What is the volume of the gas at 2.00 atm?
A. 500 ml
B. 100 mL
C. 750 mL
D. 250 mL
FIRST CORRECT ANSWER GETS 10 POINTS!!!!
Which explains how the nervous system is typically involved in keeping the body in homeostasis?
It processes the environment and sends out signals.
It controls movement and provides structure.
It physically breaks down and absorbs food.
It puts oxygen in the blood, which is essential for life.
Answer:
Explanation:
It processes the environment and sends out signals.
If you were sitting near a gram of protactinium-234 and a gram of uranium-234, both solid materials, which would you consider more dangerous to you?
aswer: protactinium-234 is more dang erous than uranium
There can be emissions of radiations like gamma radiation. There can be emission of particles too like alpha particle. Therefore protactinium-234 is more dangerous than uranium-234.
What is nuclear decay?Nuclear decay is process in which the radioactive element releases particles or radiations. Alpha particles is ⁴₂He. Alpha particle is nothing but helium particle. Protactinium-234 and uranium-234 are radioactive element.
If we were sitting near a gram of protactinium-234 and a gram of uranium-234, both solid materials then protactinium-234 is more dangerous than uranium-234. The half-life of protactinium-234 is smaller than that of uranium-234. So, protactinium-234 is more active than uranium-234 and hence more harmful than uranium-234.
Therefore, protactinium-234 is more dangerous than uranium-234.
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what is the temperature of 0.750 of a gas stored in a 6,850 mL cylinder at 2.21 atm?
What would happen if two negative charges were next to each other? What if a positive charge and a negative change were next to each other?
Answer:
if two negative charges are next to each other they repel.
But if positive and negative charges are next to each other they attract.
Explanation:
Why because like changes repel and unlike charges attract
what is the pattern of valence numbers on the periodic table?
Answer:
In general, the number of valence electrons is the same within a column and increases from left to right within a row. Group 1 elements have just one valence electron and group 18 elements have eight, except for helium, which has only two electrons total.
I NEED HELP PLS ;-; !!!!
Identify the number of electrons each of the following atoms needs to gain or lose to have a stable outer electron configuration.
a. sodium (Na)
b. strontium (Sr)
c. sulfur (S)
d. astatine (As)
Give me some examples of why is it important to understand how ocean currents flow.
Answer:
By moving heat from the equator toward the poles, ocean currents play an important role in controlling the climate. Ocean currents are also critically important to sea life. They carry nutrients and food to organisms that live permanently attached in one place, and carry reproductive cells and ocean life to new places.
Explanation:
:)
Prometheus is a character that stole fire from the gods in Greek mythology. Which element is named from Prometheus?
Answer:
Promethium
Pm 61
Discovered by Jacob .A. Marinsky
According to the Arrhenius concept, an acid is a substance that ________. According to the Arrhenius concept, an acid is a substance that ________. tastes bitter can accept a pair of electrons to form a coordinate covalent bond is capable of donating one or more H reacts with the solvent to form the cation formed by autoionization of that solvent causes an increase in the concentration of H in aqueous solutions
Answer: According to the Arrhenius concept, an acid is a substance that causes an increase in the concentration of H in aqueous solutions
Explanation:
According to the Arrhenius concept, an acid is a substance that ionizes in the water to give hydronium ion or hydrogen ion and a bases is a substance that ionizes in the water to give hydroxide ion .
[tex]HA(aq)\rightarrow H^+(aq)+A^-(aq)[/tex]
[tex]BOH(aq)\rightarrow B^+(aq)+OH^-(aq)[/tex]
According to lewis concept , an acid is a substance that accepts electrons and a base is a substance that can donate electrons.
What is the speed of the green line if the distance it covered is 4 m in a time of one second
40m/s
4m/s
2m/s
Answer: 40m/s
Explanation:
1. Fill in the best answer for each of the following: a) ________________________ is the capacity to do work or to supply heat. b) ________________________ is energy stored within a substance due to its chemical composition. c) A reaction that absorbs energy is called a(n) ________________________ reaction. d) The __________________________________ says that in any chemical or physical change, energy can neither be created nor destroyed, only changed in form. e) Thermochemistry is the study of ________________________ that occur during chemical and physical changes.
Answer:
A. Energy
B. Chemical potential
C. Endothermic reaction
D.The law of conservation of mass
E. Transfers of energy
The fill in the blanks for energy, reaction, and the law of mass is
A. Energy
B. Chemical potential
C. Endothermic reaction
D. The law of conservation of mass.
E. Transfers of energy
What is the law of conservation of mass?The law says that energy can neither be created nor destroyed.
The law was given by Antoine Lavoisier.
Thus, fill in the blanks are: A. Energy
B. Chemical potential
C. Endothermic reaction
D. The law of conservation of mass.
E. Transfers of energy
Learn more about energy
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anyone know the name of this structure please and thank you
Answer:
The graph shown is not a function because points (-1,2) and (-1,0) have the same x value.
Explanation:
Calculate the precise Molar Mass of NH3 and calculate the moles in 50.0
grams.
Answer: Molar mass of [tex]NH_3[/tex] is 17.00 g and moles in 50.0 grams is 2.94.
Explanation:
Molar mass is defined as the mass in grams of 1 mole of a substance.
S.I Unit of Molar mass is gram per mole and it is represented as g/mol.
Atomic Mass of Nitrogen (N) = 14.00 g
Atomic Mass of Hydrogen (H) = 1.00 g
Molar mass of [tex]NH_3[/tex] = 1(14.00)+3(1.00) g = 17.00 g
According to avogadro's law, 1 mole of every substance contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles and weigh equal to its molecular mass.
To calculate the moles, we use the equation:
[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}[/tex]
[tex]\text{Number of moles of }NH_3==\frac{50.0g}{17.00g/mol}=2.94moles[/tex]
what adaptation help protect a cactus against herbivores
Answer:
spines
Cacti have spines, which are also called needles or thorns. Spines are modified leaves or leaves that have changed. Spines do not dry out. Spines deter herbivores from consuming this plant.
Explanation:
hope this helps...
Answer: Tunneling underground to offer protection from predators and extreme temperatures.
Explanation: A behavioral adaptation aimed at attracting a mate. A physical adaptation that allows birds to catch prey. Modified leaves that protect a cactus from herbivores.
K2S(s) + MgI2 (aq) -----> ?
Answer:
MgS + KI = K2S + MgI2
salt in soap make the soap stronger
Answer:
yes correct salt hardens soap