Answers
Answer:
When something is stable, it's fixed and steady. If you needed advice, you'd probably go to your most stable friend, the one least likely to act crazy or be easily upset.
Explanation:
Whether you're talking about an object or a person, the adjective stable implies reliability and strength. You can describe a government as stable, or a relationship, or a desk. A completely different meaning of stable is the noun "building used for housing horses or other animals." Both senses of the word come from the Latin stabilis, "firm or steadfast."
Related Questions
Define hydrogen bonding and explain how hydrogen are bonding involved in the
transfer of genetic material.
Answers
Answer:
Hydrogen bonding is a special type of dipole-dipole attraction between molecules, not a covalent bond to a hydrogen atom. It results from the attractive force between a hydrogen atom covalently bonded to a very electronegative atom such as a N, O, or F atom and another very electronegative atom.
Explanation:
1) Which of the following reactions would be fastest in the forward direction?
A) Ea = 50 kJ/mol; E = 20 kJ/mol.
B) Ea = 80 kJ/mol; E = 10 kJ/mol.
C) Ea = 40 kJ/mol; E = -30 kJ/mol.
D) Ea = 60 kJ/mol; E = -80 kJ/mol.
2) Which of the following reactions would be slowest in the forward direction?
A) Ea = 50 kJ/mol; E = 20 kJ/mol.
B) Ea = 80 kJ/mol; E = 10 kJ/mol.
C) Ea = 40 kJ/mol; E = -30 kJ/mol.
D. Ea = 60 kJ/mol; E = -80 kJ/mol.
3) Which of the following reactions would be fastest in the reverse direction?
A) Ea = 50 kJ/mol; E = 20 kJ/mol.
B) Ea = 80 kJ/mol; E = 10 kJ/mol.
C) Ea = 40 kJ/mol; E = -30 kJ/mol.
D) Ea = 60 kJ/mol; E = -80 kJ/mol.
4) Which of the following reactions would be slowest in the reverse direction?
A) Ea = 50 kJ/mol; E = 20 kJ/mol.
B) Ea = 80 kJ/mol; E = 10 kJ/mol.
C) Ea = 40 kJ/mol; E = -30 kJ/mol.
D) Ea = 60 kJ/mol; E = -80 kJ/mol.
Answers
Answer:
1) C) Ea = 40 kJ/mol; E = -30 kJ/mol.
2) B) Ea = 80 kJ/mol; E = 10 kJ/mol.
3) Ea = 40 kJ/mol; E = -30 kJ/mol.
4) B) Ea = 80 kJ/mol; E = 10 kJ/mol.
Explanation:
The activation energy Ea is the energy that reactants must possess in order to cross the 'energy barrier' between reactants and products.
The rate of reaction depends on the activation energy as we can see from the Arrhenius equation; k = Ae^-Ea/RT. The higher the activation energy, the slower the rate of reaction.
If this is the case, then the reaction with the lowest activation energy is the fastest in any given direction while the reaction with the highest activation energy is the slowest in any given direction, hence the answers above.
PLEASE HELP I WILL GIVE 50 POINTS
Step 1: Create your poster.
On the poster board, draw a roller coaster track that starts with one large hill, followed by a valley, and then another, smaller hill.
Draw a cart in four different positions on the track, as outlined below.
First, draw the cart at the top of the first hill. Label it A.
Second, draw the cart going down the first hill, into the valley. Label it B. iii. Third, draw the cart at the bottom of the valley. Label it C.
iv. Last, draw the cart at the top of the second, smaller hill. Label it D.
c) Draw an energy pie chart above each of the cart’s four positions.
Choose your reference point for determining height.
Create a pie chart that accurately represents the ratio of the three forms of energy and label the sections of the pie Eg for gravitational potential energy, Ek for kinetic energy, and Eth for thermal energy.
Answers
Answer:
The one above me is correct! I used it. But of course I had to write a little different to the person's sentences and draw a little differently in my own way.
Explanation:
If somehow you can't open the PDF (the comment on top of my comment) here I took a screenshot of it, if you need it! Good luck everyone :D
How might you know that a liquid has dissolved in a liquid?
Help
Answers
Answer:
You would see whatever liquid you added slowly disappearing
Explanation:
Hope this helps:)........if not then sorry for wasting your time and may God bless you:)
Answer:
If you take a clear cup of water and put a camera to watch it, If you time lapsed it, you would see the water slowly evaporate.
Explanation:
Hope this helped :)
Which of the following is an incorrect representation for a neutral atom?
36Li
613C
3063Cu
1530P
Answers
This representation suggests that the element is phosphorus (P) with a mass number of 30, which is incorrect. The correct mass number for phosphorus is approximately 30.97. The incorrect representation for a neutral atom is 36Li
To determine the correct representation for a neutral atom, we need to consider the atomic number (Z) and mass number (A) of the element. The atomic number represents the number of protons in the nucleus, while the mass number represents the sum of protons and neutrons.
Let's analyze the given representations:
36Li:
This representation suggests that the element is lithium (Li) with a mass number of 36, which is incorrect. The correct mass number for lithium is approximately 6.94.
613C:
This representation suggests that the element is carbon (C) with a mass number of 13, which is correct. Carbon has different isotopes, and 13C represents one of its stable isotopes.
3063Cu:
This representation suggests that the element is copper (Cu) with a mass number of 63, which is correct. Copper has different isotopes, and 63Cu represents one of its stable isotopes.
1530P:
This representation suggests that the element is phosphorus (P) with a mass number of 30, which is incorrect. The correct mass number for phosphorus is approximately 30.97.
Therefore, the incorrect representation for a neutral atom is 36Li, as it does not match the known properties of lithium.
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A force that occurs when objects are touching each other.
separate forces
touching forces
noncontact forces
contact forces
Answers
Answer:
contact force
Explanation:
examples are frictional force etc
b) Ammonia and sulfuric acid react according to the equation given below. How many millilitres of 0.110 M sulfuric acid are required to neutralize exactly 25.0 mL of 0.0840 M NH3 solution? 2 NH3(aq) + H₂SO4 (aq) → (NH4)2SO4(aq)
Answers
The amount of 0.110 M sulfuric acid are required to neutralize exactly 25.0 mL of 0.0840 M NH3 solution is 9.55mL.
A Neutralization Reaction: What Is It?A neutralisation reaction is a chemical process in which an acid and a base combine to produce salt and water as the end products. H+ ions and OH- ions combine to generate water during a neutralisation process.
2 NH3(aq) + H₂SO4 (aq) → (NH4)2SO4(aq)
moles of NH3 = (25ml x 1L/1000mL) x 0.084M
=> 2.1x 10^(-3) moles
The mole ratio of NH3 to H₂SO4 in the given reaction
=> moles of H₂SO4 = 2.1 x 10^(-3) moles of NH3 x 1 molesH₂SO4/2 moles
NH3
=> 1.05 x 10^(-3) moles
Volume = moles/molarity
=> 1.05 10^(-3) moles/0.110M
=> 9.55 x 10^(-3) L = 9.55mL
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HELP NEEDED ASAP!!!! Which of the following statements about the filament sliding model is FALSE?
A. Actin subunits form the dark A band.
B. The thick filament has an head with an ATP-binding site.
C. The tick filament, or the M-line pulls the thin filament to contract a muscle
D. Actin and myosin are both motor proteins.
Answers
Considering the given statements about the filament sliding model in muscles, the statement that is false is;
Actin subunits form the dark A band; option AWhat are muscle filaments?Muscle filaments or myofilaments are the three protein filaments that make up the myofibrils in muscle cells.
There are three main proteins filaments that make up the myofibrils, and they are:
myosin - this is a contractile protein that makes up the dark A band in muscle fibersactin - this a contractile protein that makes up the light band in muscle fibertitin- this is an elastic proteinLearn more about muscle filaments at: https://brainly.com/question/1370027
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N⁻³ and Na⁺ have same
A Atomic no.
B Mass No.
C No. of electrons
D No. of neutrons
Answers
Answer:
C.) No. of electrons
Explanation:
A.) is incorrect. The atomic number represents the number of protons in an element. Nitrogen (N) and sodium (Na) always have a differing amount of protons.
B.) is incorrect. The mass number represents the number of protons and neutrons in an element. The number of neutrons and protons are specific to each element (disregarding isotopes). When elements ionize, these amounts are not altered.
C.) is correct. When an element becomes an ion, the number of electrons change. When nitrogen gains 3 electrons and sodium loses 1 electron, they end up having the same number of electrons (10).
D.) is incorrect. When elements ionize, the number of neutrons does not change. The only way two different elements could have the same number of neutrons is if at least one of the elements is an isotope. Isotopes are two or more atoms of the same element that differ in their amounts of neutrons.
how many litres of gas is in 500 mol Cl2 in STP
Answers
We assume here:
Ideal gas conditions
STP conditions
Then, 1 mol of Cl2 (gas) = 22.4 L
Procedure:
1 mol Cl2 -------- 22.4 L
500 moles Cl2 -------- X
X = 11,200 L Cl2
Answer: 11,200 L Cl2
Which statement about the relationship between laws, hypotheses, and theories is true?
Answers
How many full orbitals are in phosphorus
Answers
Answer:
three half-filled orbitals
Answer:
6p
Explanation:
It can hold a total of 6
a gas has an initial volume of 3,480 mL and an initial temperature of - 70.0 C. what must be the temperature of the gas in kelvin if its volume is reduced to 2,450 mL
Answers
The temperature of the gas in Kelvin, after its volume is reduced to 2,450 mL, is approximately 143.27 K.
To determine the temperature of the gas in Kelvin after its volume is reduced, we can use the combined gas law, which relates the initial and final conditions of pressure, volume, and temperature for a given amount of gas.
The combined gas law equation is:
(P₁ * V₁) / T₁ = (P₂ * V₂) / T₂
Where P₁ and P₂ are the initial and final pressures, V₁ and V₂ are the initial and final volumes, T₁ is the initial temperature in Kelvin, and T₂ is the final temperature in Kelvin.
Given that the initial volume V₁ is 3,480 mL, the initial temperature T₁ is -70.0 °C (which needs to be converted to Kelvin), and the final volume V₂ is 2,450 mL, we can substitute these values into the equation.
To convert -70.0 °C to Kelvin, we add 273.15 to it, resulting in T₁ = 203.15 K.
Now we can solve for T₂:
(T₂ * V₁) / T₁ = V₂
T₂ = (V₂ * T₁) / V₁ = (2,450 mL * 203.15 K) / 3,480 mL
Simplifying the equation, we find:
T₂ ≈ 143.27 K
Therefore, the temperature of the gas in Kelvin, after its volume is reduced to 2,450 mL, is approximately 143.27 K.
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Kohlberg believed people shift back and forth between the six schemas in his three levels of moral reasoning, depending on the circumstance and the person's current level of cognitive development.
Please select the best answer from the choices provided
T
F
Answers
Answer:
False
Explanation:
I got 100 on the test on edge
Part B
The image models what happened after each cup was placed over an effervescent tablet. Note the changes in the water level and the air space in both glasses. The tablets are shown to help see how the experiment was setup, but the model represents the air bubbles after the tablets fully dissolved. Write down your observations in the space provided.
Answers
Answer:
The Changes I see is the Hot glass have less air bubbles than the Cold Glass. The Cold Glass has more air bubbles than the Hot Glass.
I hope this helps. I tried my best!! Good Luck!!
which is the graph of the function g(x) = f(-x)
Answers
To graph the function g(x) = f(-x), you can start with the graph of f(x) and then reflect it about the y-axis.
What is a graph of the function g(x) = f(-x)?To find the graph of the function g(x) = f(-x), we can start with the graph of the function f(x) and then reflect it about the y-axis.
If the graph of f(x) is symmetric with respect to the y-axis, meaning it is unchanged when reflected, then g(x) = f(-x) will have the same graph as f(x).
However, if the graph of f(x) is not symmetric with respect to the y-axis, then g(x) = f(-x) will be a reflection of f(x) about the y-axis.
In either case, the resulting graph of g(x) = f(-x) will be symmetric with respect to the y-axis.
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The molar volume of a certain form of solid lead is 18 cm3/mol. Assuming cubic closest-packed structure, determine the following.
The number of Pb atoms per unit cell
3
4
10
12
14
Answers
18 cm3/mol is the molar volume of a specific type of solid lead. The following should be determined assuming a cubic closest-packed structure. 4 Pb atoms are contained in each unit cell.
What materials make up atoms?Protons, neutrons, and electrons are three extremely small types of particles, together referred to as subatomic particles, that make up an atom. The nucleus, which is made up of protons and neutrons, is where an atom's energy is stored. An electron cloud flies above the nucleus.
Are we made of atoms?Atoms of hydrogen, carbon, nitrogen, and oxygen make up the vast majority of the molecules in your body. The other elements necessary for life are also present in much lesser quantities in you.
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Pls answer how many neutrons, protons, and electrons there are. I will give points, thanks, 5 stars, and brainliest if you answer correctly. Thank you and have a nice day :)
Answers
Answer:
19 electron 19 proton 20 neutrons
it’s an astronomy question
Which method would you use to obtain the distance to each of the following? An asteroid crossing Earth's orbit B. A star astronomers believe to be no more than 50 light-years from the Sun A tight group of stars in the Milky Way Galaxy that includes a significant number of variable stars D. A star that is not variable but for which you can obtain a clearly defined spectrum
Answers
Answer:
A. Radar would be the best tool for measuring distances to objects in the solar system.
B. A parallax measurement would be best for this nearby star.
C. Cepheids or RR Lyraes would be useful for determining the distance to this cluster.
D. The method using the H-R diagram and getting a spectrum to determine the luminosity class of the star.
All the steps please!It is dangerous for aerosol cans to be exposed to heat. If a can of hairspray at a pressure of 4 atmospheres and a room temperature of 27 ° C is thrown into a fire and the container reaches 402 ° C. What will its new pressure be? The can can explode if the internal pressure exerts 6080 mm Hg. How likely is it to explode?
Answers
Answer
The new pressure = 9 atm.
Since the new pressure of 6840 mmHg (9 atm) exceeds 6080 mmHg, then the can will likely explode.
Explanation
Given:
Initial pressure P₁ = 4 atm
Initial temperature, T₁ = 27 °C = (27 + 273.15 K) = 300.15 K
Final temperature, T₂ = 402 °C = (402 + 273.15 K) = 675.15
What to find:
The new pressure at a temperature of 402 °C.
Step-by-step solution:
According to Amonton's law: The pressure of a given amount of gas is directly proportional to its absolute temperature, provided that the volume does not change, i.e:
\(\frac{P_1}{T_1}=\frac{P_2}{T_2}\)Putting P₁ = 4 atm, T₁ = 300.15 K, and T₂ = 675.15 K into the formula, we have:
\(\begin{gathered} \frac{4atm}{300.15K}=\frac{P_2}{675.15K} \\ \\ Cross\text{ }multiply \\ \\ P_2\times300.15K=4atm\times675.15K \\ \\ Divide\text{ }both\text{ }sides\text{ }by\text{ }300.15K \\ \\ \frac{P_2}{300.15K}=\frac{4atm\times675.15K}{300.15K} \\ \\ P_2=9\text{ }atm \end{gathered}\)The new pressure at a temperature of 402 °C = 9 atm.
According to the information in the question that the can explode if the internal pressure exerts 6080 mmHg, then we need to convert 9 atm to mmHg to know how likely is it to explode.
Conversion factor:
1 atm = 760 mmHg
So 9 atm = (9 atm/1 atm) x 760 mmHg = 6840 mmHg
Since 6840 mmHg pressure exceeds 6080 mmHg, then the can will likely explode.
The passage's author most vividly conveys the sense that Plumpp's poetry is like music when he
O uses words like "swing," "dance," and "sway" to characterize phrases in Plumpp's poems
O defines Plumpp as "the poet laureate of Chicago jazz and blues"
explains how long Plumpp has been writing about "Chicago jazz giants"
urges people to read Plumpp's poems and listen to the music Plumpp "immortalizes in print"
Answers
It is an amine, and it has less polar nitrogen-hydrogen and oxygen-hydrogen bonds.
A compound's boiling point is a physical characteristic. These intramolecular linkages between the molecules that make up a chemical affect these physical characteristics.
Alcohols and amino acids have the same kind of intermolecular linkages. The hydrogen bond is the name of this kind of bond.
The electrical attraction between a hydrogen atom from one molecule and an electronegative atom from a nearby molecule is known as a hydrogen bond.
The strength of the bond is in the following order: H.....F > H.....O > H......N
The H....N hydrogen bonds exist in amines, whereas the H....O hydrogen bonds exist in alcohols.
Consequently, the alcohol's hydrogen bonds are stronger and it will impart a higher boiling point on the compound.
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Answer:uses world like
Explanation:
9. A 125.0-g sample of metal is heated to 100.0 °C and placed in a calorimeter that contains 250.0 g
of water. The temperature rises from 24.3 °C to 27.2 °C. What is the specific heat capacity of the
metal? Ignore the calorimeter in your analysis.
10. A 750.0-g sample of a metal is heated to 100.0 °C and placed in a calorimeter that contains
1,000.0 grams of water. The temperature starts out at 24.9 °C and ends at 26.5 °C. If the
calorimeter has a heat capacity of 1,101 J/°C, what is the specific heat of the metal?
Answers
9. The specific heat capacity of the metal is approximately 0.47 J/g°C, 10. The specific heat of the metal is approximately 0.52 J/g°C.
9-To determine the specific heat capacity of the metal, we can use the formula:
q = mmetal × cmetal × ΔTmetal + mwater × cwater × ΔTwater
where q is the heat transferred, m is the mass, c is the specific heat capacity, and ΔT is the change in temperature.
cmetal = q/(mmetal × ΔTmetal)
q = mwater × cwater × ΔTwater = (250.0 g) × (4.184 J/g°C) × (27.2°C - 24.3°C) = 3111.8 J
mmetal = 125.0 g
ΔTmetal = 27.2°C - 100.0°C = -72.8°C
cmetal = 3111.8 J/(125.0 g × -72.8°C) ≈ 0.47 J/g°C
10- To solve for the specific heat of the metal, we need to account for the heat capacity of the calorimeter as well. The heat transferred from the metal to the water is given by:
q = (mmetal × cmetal + Ccalorimeter) × ΔT + mwater × cwater × ΔT
cmetal = (q - Ccalorimeter × ΔT)/(mmetal × ΔT)
q = (1000.0 g) × (4.184 J/g°C) × (26.5°C - 24.9°C) = 1253.44 J
Ccalorimeter = 1101 J/°C
mmetal = 750.0 g
ΔT = 26.5°C - 100.0°C = -73.5°C
cmetal = (1253.44 J - 1101 J/°C × -73.5°C)/(750.0 g × -73.5°C) ≈ 0.52 J/g°C
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name 2 elements that are liquid at room temperature and describe their colour
Answers
Answer:
Bromine
Mercury
Bromine (symbol Br and atomic number 35) is a reddish-brown liquid, with a melting point of 265.9 K. Mercury (symbol Hg and atomic number 80) is a toxic shiny silvery metal, with a melting point of 234.32 K.
Why did Rutherford choose alpha particles in his experiment?
Answers
Where cool air descends to the ground there is a
Select one:
a.
high-pressure zone.
b.
Foehn wind.
c.
valley breeze.
d.
polar front.
Answers
The correct option is (a) Cool air descends to the ground there is a high-pressure zone.
At the top of the troposphere, air moves horizontally; this movement is referred to as advection. Until it lowers, the air gets cooler. A high pressure zone is produced when the air reaches the ground.What is an area of high pressure?Areas with high pressure are those with relatively thick atmospheres. These regions experience winds, though they spiral outward. The air that is still in the high-pressure region progressively falls lower to fill the space left by the ejected air.In which area air pressure is high?According to climatology, air that has been lifted at the equator causes high pressure to develop at the horse latitudes,
also known as the torrid zone, between the latitudes of 20 and 40 degrees from the equator.
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Classify the following amine as 1º, 2º, 3º or 4°
(primary, secondary, tertiary, quaternary).
(CH3)4N+
A. primary
B. secondary
D. quarternary
C. tertiary
Answers
Answer:
D. Quaternary
Explanation:
I'm going to attach a picture that can help you understand how amines are classified!
I'll explain how amines are classified below. You can skip it if you feel that you already understand that!
--------------------------------------------------------------------------------------------------------------
So we know that amines are composed of nitrogen, at least one R group, and hydrogens. The way that we categorize amines as primary, secondary, tertiary, or quarternary is by counting the number of R groups.
Now, how do we identify the R groups?
Well, basically anything that isn't a hydrogen. You will see that the nitrogen in an amine standardly only makes 3 bonds. If all those three bonds are with a hydrogen, then it will be ammonia. If it is a primary amine, then one of those hydrogens will be replaced with another compound (like \(CH_{3}\) in this case). This other compound is called an R group. R groups will change based on the amine. A secondary amine will have two hydrogens replaced with groups. A tertiary amine will have all three hydrogens replaced with R groups.
--------------------------------------------------------------------------------------------------------------
Now, by this logic, we can just count the number of R groups in \((CH_{3} )_{4} N^{+}\) and we should get our answer! We don't see any hydrogens. That means we can immediately rule out both A. and B.
Well, let's see. It looks like \(CH_{3}\) is our R group. The subscript for it is also 4.
But we've used up our 3 bond spots, how is a quaternary amine possible? And that is why you see that your nitrogen has a positive charge in \((CH_{3} )_{4} N^{+}\). Since the nitrogen is bonded with more groups than it usually does, the electrons of nitrogen and therefore the electrical charge will be shared between more compounds and elements, leading to less charge for the nitrogen. This will cause it to have a positive charge. Making your amine an ion will allow for 4 bonds.
That is why even though nitrogen usually only has 3 bonds, we can still classify \((CH_{3} )_{4} N^{+}\) as a quaternary amine.
--------------------------------------------------------------------------------------------------------------
The last part got a little lengthy, but I hope I was able to explain this question in-depth! If you had any trouble understanding what I wrote, feel free to leave a comment. I will reply as soon as possible!
PLEASE ANSWER QUICKLY!!!!
2KI (aq) + Cl₂(g) → 2KCl(aq) + 1₂(g)
What volume of 12 gas forms when
21 L Cl2 react at STP?
[?] L 12
Answers
The volume of 12 gas forms when 21 L Cl2 react at STP is 21 L.
To determine the volume of 12 gas (I assume you mean I2 gas) formed when 21 L of Cl2 reacts at STP (standard temperature and pressure), we need to use the ideal gas law equation.
The ideal gas law equation is given by:
PV = nRT
Where:
P = pressure
V = volume
n = number of moles
R = ideal gas constant
T = temperature
At STP, the pressure is 1 atm, and the temperature is 273.15 K.
From the balanced equation, we can see that the molar ratio between Cl2 and I2 is 1:1. So, if 21 L of Cl2 reacts, it will produce an equal volume of I2 gas.
Given that the volume of Cl2 is 21 L, we can assume the volume of I2 gas formed will also be 21 L.
Therefore, the volume of I2 gas formed is 21 L.
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3. Make a claim as to why the leading cause of residential fires is not the leading cause of residential fire deaths.4. What percentage of fires are intentionally set? Why might someone intentionally set a fire?5. Do you think there would be more structural fires in the summer or winter? Explain your answer.
Answers
3. The leading cause of residencial fires (cooking equipment) is not the leading cause of residential death because the fire in the equipment can be extinguished in time, while the effects of smoking can remain unsigned in time.
4. The percentage of intentionally set fires is 8%. Someone might intentionally set a fire for example by burning yard trimmings.
5. There would be more structural fires in summer due to the high temperatures and the lack of rain.
What measurement describes the pressure of gas
Answers
Answer:
a manometer
Explanation:
A manometer can be used to measure the pressure of a gas. The (difference in) height between the liquid levels (h) is a measure of the pressure. Mercury is usually used because of its large density.
Physical chemistry is the bridge between physics and chemistry.
a. True
b. False
Answers
Answer:
Im gonna go with.... B. False
________________________________
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Yes it is true. That physical chemistry is a bridge between physics and chemistry. Because here we study the physical behaviours of the chemical reactions.