Answer:
Explanation:
First count the protons. I think there are 10 of them. That pretty much locks it in. The atom must be Neon.
All the electrons are in the first 2 rings and there are 10 all together.
Neon
A cold recovers a pink balloon filled with 2. 30 L of helium at an amusement park outside in the hot St. Louis summer air. What can you predict what will happen to that balloon when it is brought into the salt conditioned car as the child rides home
When the cold balloon filled with 2.30 L of helium is brought into the salt-conditioned car, the balloon is likely to shrink or decrease in size.
The volume of a gas is directly affected by temperature. When the cold balloon filled with helium is brought into a salt-conditioned car, the temperature inside the car is likely to be lower than the temperature outside. As a result, the temperature of the helium gas inside the balloon will decrease. According to Charles's Law, the volume of a gas decreases with a decrease in temperature, assuming constant pressure. Therefore, the helium gas inside the balloon will contract, causing the balloon to shrink or decrease in size.
Thus, the balloon will shrink or decrease in size when brought into the salt-conditioned car.
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chemistry has no role in solving the problems of mankind true or false
Topic: Mass Balance. A company sells fishmeal to be used as a protein supplement in certain foods. The process consists of: a. Extraction of fish oil, stage in which a pasta is obtained that has 20% flour and 80% water. b. Drying of pasta in a rotary drum, which produces fishmeal with 40% humidity. How much pasta must be input to the process to produce 1000 kg ?
To produce 1000 kg of fishmeal (M = 1000 kg), you would need 3000 kg of pasta. To determine the amount of pasta required to produce 1000 kg of fishmeal, we need to consider the mass balance of the process. Let's break down the steps involved:
A. Extraction of fish oil:
The pasta obtained from the extraction stage contains 20% flour and 80% water. To calculate the amount of pasta, we need to determine the mass of flour and water in the pasta. Let's assume the total mass of the pasta is P kg.
Mass of flour = 20% of P = 0.2P kg
Mass of water = 80% of P = 0.8P kg
b. Drying of pasta:
During the drying stage, the pasta is dried in a rotary drum, resulting in fishmeal with 40% humidity. This means that the final fishmeal will contain 60% dry matter.
Let's assume the mass of the dried fishmeal is M kg.
Mass of dry matter = 60% of M = 0.6M kg
Since the dry matter in the fishmeal comes from the flour in the pasta, we can equate the mass of dry matter to the mass of flour:
0.6M kg = 0.2P kg
To produce 1000 kg of fishmeal, we want to find the corresponding value of P:
0.6M = 0.2P
P = (0.6M) / 0.2
P = 3M
Therefore, to produce 1000 kg of fishmeal (M = 1000 kg), you would need 3000 kg of pasta.
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Based on this chart, what percentage of energy comes from fossil fuels?
Sources of Energy
Petroleum
37%
Other
1%
Natural Gas
24%
Renewable
Energy
7%
Coal
23%
Nuclear
Electric Power
8%
O A. 60%
OB. 23%
Ο Ο Ο Ο
C. 84%
O D. 37%
Answer:
37%+24%+23%=84% , i wish my answer is correct
Question
Arrange the following compounds in the order of decreasing reactivity towards etectrophillc substitution reaction.


A
IV > III > II > I
B
I > II > IV > III
C
I > II > III > IV
D
I > III > IV > I
Medium
The decreasing order of reactivity towards electrophilic substitution reaction of the given compounds is: IV > III > II > I. The correct option is A.
When the electrophile attacks the benzene ring in electrophilic substitution reaction, the reaction occurs through the formation of a sigma complex, which is then converted to a pi complex. The formation of sigma complex is the slow and rate-determining step of the reaction. The more stable the sigma complex, the faster will be the rate of reaction.
The stability of sigma complex depends on the electron density on the ring. The more electron-rich the ring, the more stable the sigma complex, and hence, the faster the rate of reaction. Therefore, the decreasing order of reactivity towards electrophilic substitution reaction is A IV > III > II > I.
IV is the most electron-rich compound among the given compounds as it has two electron-donating -CH3 groups attached to the ring. Therefore, it will be the most reactive towards electrophilic substitution reaction.
I is the least electron-rich compound among the given compounds as it has a strong electron-withdrawing -NO2 group attached to the ring. Therefore, it will be the least reactive towards electrophilic substitution reaction.
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consider the data showing the initial rate of a reaction at several different concentrations of a. what is the order of the reaction? write a rate law for the reaction, including the value of the rate constant, k.
data displaying the beginning rate of a chemical reaction at various a concentrations. What is the reaction's order? The reaction has a three-step sequence.
Does feeling and reaction coincide?Feelings are the consciously felt expression of emotional reactions, whereas emotions are linked to physical reactions that are triggered by neurotransmitters and hormones generated by the brain.
The M Rate (M/s) in [A].
1. 0.15 0.014
2. 0.30 0.113
3. 0.60 0.905
To establish:
the reaction's sequence
The given reaction's rate can be stated as follows:
where k is the rate constant and rate equals k [A]n——(1)
[A] = the amount of A
n is the reaction order.
The Rates 1 and 2 can be stated as follows in light of Equation (1):
0.014 = k[0.15] .15]
ⁿ ———(3) (3)
0.113 = k[0.30] .30]
ⁿ———-(4)
The result of dividing equation (4) by (3) is [0.30/0]/0.1113. .15]
n 8 = 2ni.e. 23 = 2n n = 3 Response: Therefore, the reaction is in this order: 3.
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Give one hazard of using sodium hydroxide and state how to reduce the risks from this hazard.
Answer:
Sodium hydroxide is very corrosive. It can cause irritation to the eyes, skin, and mucous membrane; an allergic reaction; eye and skin burns; and temporary loss of hair. Workers may be harmed from exposure to sodium hydroxide.
Explanation:
How to reduce:
Inhalation: Move victim to fresh air.
Skin Contact: Avoid direct contact
Eye Contact: Avoid direct contact
Ingestion: Have victim rinse mouth with water.
The density of water is ____________.
Answer:
The density of water is 1 g/mL.
Explanation:
An ethylene glycol solution contains 26.4 g of ethylene glycol (C2H6O2) in 92.8 mL of water. (Assume a density of 1.00 g/mL for water.)
Determine the freezing point of the solution. (Use Kf=1.86∘C/m .) Express you answer in degrees Celsius.
Determine the boiling point of the solution. (Use Kb=0.512∘C/m .) Express you answer in degrees Celsius.
Both the freezing point and boiling point are physical properties of a substance and are influenced by factors such as atmospheric pressure and the presence of solutes in a solution. The freezing point of the solution is -8.51 °C, and the boiling point of the solution is 102.35 °C.
The freezing point of a substance is the temperature at which it changes from a liquid phase to a solid phase under normal atmospheric pressure. The boiling point of a substance is the temperature at which it changes from a liquid phase to a gaseous phase under normal atmospheric pressure. It is the temperature at which the substance vaporizes or boils.
To determine the freezing point and boiling point of the solution, we need to use the equation:
\(\Delta T = Kf * m\) (for freezing point)
\(\Delta T = Kb * m\)(for boiling point)
Where:
∆T is the change in temperature
Kf is the freezing point depression constant
Kb is the boiling point elevation constant
m is the molality of the solution (moles of solute per kilogram of solvent)
First, let's calculate the molality (m) of the solution:
The molar mass of ethylene glycol:
\((C_2H_6O_2) = (212.01 g/mol) + (61.01 g/mol) + (2*16.00 g/mol) = 62.07 g/mol\)
moles of ethylene glycol = 26.4 g / 62.07 g/mol = 0.425 mol
mass of water = 92.8 mL * 1.00 g/mL = 92.8 g
molality (m) = moles of solute / mass of solvent (in kg) = 0.425 mol / 0.0928 kg = 4.58 mol/kg
Now, let's calculate the freezing point depression (∆T) and the boiling point elevation (∆T):
∆T (freezing point) = \(Kf * m = 1.86^0C/m * 4.58 mol/kg = 8.51^0C\)
∆T (boiling point) =\(Kb * m = 0.512^0C/m * 4.58 mol/kg = 2.35^0C\)
To find the freezing point of the solution, subtract ∆T from the freezing point of pure water (0 °C):
Freezing point =\(0^0C - 8.51^0C = -8.51^0C\)
To find the boiling point of the solution, add ∆T to the boiling point of pure water (100 °C):
Boiling point = \(100^0C + 2.35^0C = 102.35^0C\)
Therefore, the freezing point of the solution is -8.51 °C, and the boiling point of the solution is 102.35 °C.
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. ti(h2o)6 3 absorbs light at 500 nm, but tif6 3 absorbs light at 590 nm. which of the following explains this difference in absorption
The difference in absorption between ti(h2o)6 3 and tif6 3 is due to the different electronic configurations and molecular geometries of the two complexes.
The absorption of light by a complex is related to the energy required to promote an electron from a ground state orbital to an excited state orbital.In ti(h2o)6 3, the titanium atom is surrounded by water ligands which create a high spin d2 configuration. In tif6 3, the titanium atom is surrounded by fluoride ligands which create a low spin d1 configuration.
This phenomenon occurs because the energy required for electronic transitions in TiF6 3- is lower than in Ti(H2O)6 3+, resulting in the observed difference in light absorption.
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Which of these pathogens can be killed by antibiotics?
A) viruses
B) Bacteria
C) Both Bacteria and Viruses
D) Fungi, Bacteria, and Viruses
Answer:
it's c.
Explanation:
hope this helps
Mitchell and his lab partner were conducting a titration experiment. Their goal was to neutralize 0.50 mol NaOH. How many moles of H2SO4 are needed to complete the neutralization? A) 0.25 mol B) 0.50 mol C) 1.00 mol D) 2.00 mol
Answer:
The answer is "Option A"
Explanation:
Given:
Moles in \(NaOH = 0.50\)
The equation formula for \(NaOH\)and\(H_2SO_4\) reactions as follows:
\(2NaOH+H_2SO_4\rightarrow Na_2SO_4+2H_2O\)
The reaction's stoichiometry:
If 2 moles of \(NaOH\) react with 1 \(H_2SO_4\) mole
Thus 0.50 \(NaOH\) moles react with = \(\frac{1}{2} \times 0.50\) \(H_2SO_4\) moles
So, the final value is= 0.25
Identify any solutes and solvents present in a mixture of 0.05 mol ethanol, 1 liter water, and 0.2 g hydrogen
peroxide.
Answer:
Water is the solvent
Both the ethanol and the hydrogen peroxide are the solute
Explanation:
Both the hydrogen peroxide and ethanol are sisobable in water.
There are 0.05 moles of ethanol.
1 litreof water contains 55.55 moles of water.
0.2 g of hydrogen peroxide contains 0.2/34 = 0.0059 moles of hydrogen peroxide (the 34 is the molar mass of hydrogen peroxide).
Since there are more moles of water, water becomes the solvent and the other two liquids dissolve in it.
When 300.mL of 0.70M HCl is mixed with 40. mL of 2.00M NaOH, what will be the approximate pH of the resulting mixture
The approximate pH of the resulting mixture is 0.42
When 300 mL of 0.70 M HCl is mixed with 40 mL of 2.00 M NaOH, what will be the approximate pH of the resulting mixture?A neutralization reaction will occur when 300 mL of 0.70 M HCl is mixed with 40 mL of 2.00 M NaOH. HCl is an acid, and NaOH is a base, so when they react, they form water and a salt. The equation for this reaction is:HCl(aq) + NaOH(aq) → NaCl(aq) + H2O(l)To solve the problem, we'll need to find out how many moles of each substance are present. This can be done by using the equation:n = c x VWhere n is the number of moles, c is the concentration in molarity, and V is the volume in liters.For HCl:n = 0.70 M x 0.300 L = 0.210 molesFor NaOH:n = 2.00 M x 0.040 L = 0.080 molesSince HCl and NaOH react in a 1:1 ratio, the limiting reactant in this reaction is NaOH, and it will react completely with 0.080 moles of HCl.
The remaining 0.130 moles of HCl will be in excess and will not react. Therefore, the number of moles of NaCl that are formed will be 0.080 moles.To find the pH of the resulting mixture, we need to know the concentration of H+ ions in solution. These can be found by using the equation:[H+] = n / Vwhere n is the number of moles of H+ ions, and V is the volume of the solution in liters. Since we have an excess of HCl in solution, the concentration of H+ ions will be equal to the concentration of the excess HCl.
This can be found by using the equation:[H+] = 0.130 moles / 0.340 L = 0.382 MTo find the pH of this solution, we can use the equation:pH = -log[H+]pH = -log[0.382]pH = 0.419Therefore, the approximate pH of the resulting mixture is 0.42 (rounded to two decimal places).Answer: pH = 0.42 (approximate)
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let me rephrase that: assuming the strength of an acid is determined by how well a substance is willing to let go of its proton and taking into consideration the fact that electrons are bound to orbitals (BUT may move between them) is true, then would acids still be possible if the positions of electrons and protons were swapped?
The strong acid and strong base has high rate constant of dissociation. The rate constant for weak acid and base for the dissociation is low, they do not easily dissociate in water. Therefore, no, acid would not remain acid if the positions of electrons and protons were swapped.
What are acid and base?Acid is a solution which releases H⁺ hydrogen ion when dissolved in water. Base releases hydroxide ion OH⁻ ion when dissolved in water.
pH is a measurement of amount of hydronium ion H₃O⁺ in a given sample. Strength of acidic nature is directly proportional to the concentration of hydronium ion.
On subtracting pH from 14, we get pOH which measures the concentration of hydroxide ion in a given solution. Temperature affect the pH. At room temperature pH scale is between 0 to 14. 7 is the pH of neutral solution. No, acid would not remain acid if the positions of electrons and protons were swapped.
Therefore, no, acid would not remain acid if the positions of electrons and protons were swapped.
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Choose a celebrity who died due to an overdose of drugs or alcohol and answer the following questions in your discussion post:
1)What is the name and cause of death of the celebrity?
2)What drug(s) was indicated in the death of this person?
3)What type of drug was it? (Depressant, stimulant, hallucinogenic, etc.)
4)What are the typical effects of that drug?
5)How is the drug typically identified and analyzed in the Toxicology lab?
6)List one question that you would ask the friends and family of the deceased to help with the investigation.
Answer:
Jay Bennett
Fentanyl
Opioid
extreme happiness, drowsiness, nausea, confusion, constipation, sedation, tolerance, addiction, respiratory depression and arrest, unconsciousness, coma, and death.
In Urine
Why did Jay overdose on Fentanyl?
Explanation:
I looked all of this up
What is the temperature?
Answer:
17.25 degrees
Explanation:
....but I cannot tell you if that is °C or °F <===== that is left out of the question.
a liquid to suction heat exchanger is often used to
A liquid-to-suction heat exchanger is often used to cool refrigerant vapor in a refrigeration or air conditioning system. It is a type of heat exchanger that transfers heat between a liquid, such as water or a refrigerant, and the suction line of a compressor.
In a refrigeration or air conditioning system, the compressor plays a crucial role in compressing the refrigerant vapor and raising its temperature and pressure. As the refrigerant vapor leaves the compressor, it is typically at a high temperature, which needs to be reduced before it enters the condenser.
The liquid-to-suction heat exchanger, also known as an intercooler or suction line accumulator, is positioned in the suction line between the compressor and the evaporator. Its primary purpose is to cool down the hot refrigerant vapor and remove heat from it before it reaches the condenser.
The heat exchanger consists of coils or tubes through which a cooling liquid, such as chilled water or a secondary refrigerant, flows. As the hot refrigerant vapor passes through the coils, it transfers heat to the cooler liquid, causing the refrigerant vapor to condense into a liquid state.
The cooled and condensed refrigerant liquid then continues its journey to the condenser, where further heat removal occurs, resulting in the release of heat to the external environment. The liquid-to-suction heat exchanger helps improve the overall efficiency of the refrigeration or air conditioning system by reducing the workload on the condenser and improving the system's capacity to remove heat.
Additionally, the liquid-to-suction heat exchanger can also act as a separator to remove any liquid refrigerant or oil that may have entered the suction line. It ensures that only vapor enters the compressor, preventing potential damage caused by liquid entering the compressor.
Overall, the liquid-to-suction heat exchanger plays a vital role in the cooling process of a refrigeration or air conditioning system by reducing the temperature of the refrigerant vapor before it reaches the condenser and helping to separate any liquid refrigerant or oil from entering the compressor.
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In two or more complete sentences, describe how one of the occupations that you studied would use descriptive statistics when performing their job. Justify your answers in two or more complete sentences. in science
Answer:
I need an answer someone HELP MEEEEEEE
what is one of the causes of mechanical weathering
Answer:
Mechanical weathering is usually caused by extreme hot and cold temperatures. Water seeps into cracks in rocks, freezes, and expands, causing further breakdown of rocks. Wind is another example of mechanical weathering.
Explanation:
Answer:
carbon dioxide i think
Explanation:
if a dog eats graphite (pure carbon) and ends up with 2.973 moles of carbon in their stomach, how many atoms of carbon does she have?
The number of atoms of carbon in 2.973 moles would be 1.791 x 10^24 atoms
Number of atoms in moles of a substanceThe Avogadro's number (number of particles per mole) is 6.022 x 10^23.
To determine the number of atoms of carbon in 2.973 moles, we can use the following calculation:
Number of atoms of carbon = (2.973 moles) x (6.022 x 10^23 atoms/mol)
= 1.791 x 10^24 atoms
Therefore, the dog would have 1.791 x 10^24 atoms of carbon in its stomach if it consumed 2.973 moles of pure graphite.
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At 70℃, the solubility of KCl is approximately 50 g KCl per 100 g water. Using this solubility, calculate the amount of KCl that will dissolve in 200 g of water at 70℃.
50 g KCl
100 g KCl
25 g KCl
There is not enough information to determine the correct answer.
What is a solution?
O A. A clear liquid with nothing dissolved in it
B. A mixture of two solids blended together
C. A compound that is in liquid and gas states
O D. A liquid with something dissolved in it
D. A liquid with something dissolved in it
A solution is a liquid with something dissolved in it.
The correct answer is D. A solution is a homogeneous mixture composed of two or more substances. It consists of a solvent, which is the component present in the larger amount, and a solute, which is the component that is dissolved in the solvent. In a solution, the solute particles are dispersed uniformly throughout the solvent, resulting in a single phase.
Solutions can be formed with various combinations of solvents and solutes. Common examples include saltwater (where salt is dissolved in water), sugar dissolved in coffee, and carbon dioxide dissolved in soda. In these examples, the solvent is water, coffee, and soda, respectively, while the solutes are salt, sugar, and carbon dioxide.
The formation of a solution occurs when the solute particles interact with the solvent particles, forming intermolecular bonds or attractions. These interactions allow the solute particles to become dispersed and distributed evenly throughout the solvent. As a result, the solute particles are no longer visible, and the solution appears uniform and transparent.
Solutions play a crucial role in various aspects of everyday life and scientific processes. They are widely used in industries, laboratories, and households for purposes such as cleaning, manufacturing, chemical reactions, and medicine. The ability to dissolve substances in a solvent and create solutions is a fundamental concept in chemistry and has important implications in fields such as biology, pharmacology, and environmental science.
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For the following word equations, write it as a chemical equation, then balance it.
a) potassium + oxygen gas ------ potassium oxide
4K+O2-----------2K2O
The count in a bacteria culture was 900 after 20 minutes and 1700 after 40 minutes. Assuming the count grows exponentially, What was the initial size of the culture
The initial size of the bacteria culture was approximately 400.
What was the starting count of the bacteria culture?Assuming exponential growth, we can determine the initial size of the bacteria culture by analyzing the given data.
Exponential growth follows the formula N = N0 * e^(kt), where N is the count at a given time, N0 is the initial count, k is the growth rate constant, and t is the time elapsed. In this case, we have two data points: N1 = 900 at t1 = 20 minutes, and N2 = 1700 at t2 = 40 minutes.
Plugging these values into the formula, we get 900 = N0 * e^(20k) and 1700 = N0 * e^(40k). Dividing the second equation by the first equation, we get 1700/900 = e^(40k)/e^(20k), simplifying to 1.89 = e^(20k).
Taking the natural logarithm of both sides, ln(1.89) = 20k, and solving for k, we find k ≈ 0.035. Substituting this value of k back into the first equation, we get 900 = N0 * e^(20 * 0.035), which simplifies to N0 ≈ 400. Therefore, the initial size of the bacteria culture was approximately 400.
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Sodium bicarbonate (baking soda) reacts with acetic acid (vinegar) and forms sodium acetate, water, and carbon dioxide gas.
The chemical equation for this reaction is:
NaHCO3 + C2H4O2 → NaC2H3O2 + H2O + CO2
How can you use the chemical equation to explain what you observed when you added vinegar (acetic acid) to baking soda (sodium bicarbonate)? Use atoms in your explanation.
a sample of helium gas at 300°c and 600 torr is in a 200 l container. if the temperature of the gas is raised to 900°c at constant volume, how is the pressure of the gas affected?
A sample of helium gas at 300°c and 600 torr is in a 200 l container, if the temperature of the gas is raised to 900°C at constant volume, the pressure of the gas affected will increase threefold from 600 torr to 1800 torr.
This can be explained using Charles's law, which states that the volume of a gas is directly proportional to its absolute temperature at a constant pressure. When the temperature is increased from 300°C to 900°C, the volume of the gas will remain constant since the container has a fixed volume.
Therefore, the pressure of the gas will increase according to Gay-Lussac's law, which states that the pressure of a gas is directly proportional to its absolute temperature at a constant volume. Since the temperature is tripled, the pressure will also triple. So therefore, the pressure of the gas sample will increase threefold from 600 torr to 1800 torr when the temperature is raised from 300°C to 900°C at constant volume.
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The correct number of atoms of each element present in the formula Cu3(PO4) 2 is:
1) Write the formula
\(Cu_3(PO_4)_2\)2) The subscripts show us the number of each atom in the formula. In this case, we also have to make sure to count the parenthesis subscript.
There are
3 Cu
2 P
8 O
What was the first person who invented a light bulb
Answer:
Thomas edison would be you're asnwer
Answer: The person who invented the light bulb was Thomas Edison
Explanation:
If a gas effuses at a rate 0.52855 times as fast as CI2 what is the gas?
Answer:
The rate of effusion for a gas is inversely proportional to the square-root of its molecular mass (Graham's Law). The gas with the lowest molecular weight will effuse the fastest. The lightest, and therefore fastest, gas is helium.
Explanation: