C
Pure water is at 7, and the bases are above 7 and the acids are below 7.
The pH of the solution that is classified as a weak base is 10. Details about weak bases can be found below.
What is pH?pH of a solution refers to the degree of acidity or alkalinity of that solution.
The pH scale reads from 1 - 14 where the following applies:
1 - 6 represents acidic solution7 represents neutral8 - 14 represents alkaline solutionA weak base will have a pH close to neutral, therefore, the pH of the solution that is classified as a weak base is 10.
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Which types of changes must follow the law of conservation of mass? (2 points)
O Both physical and chemical changes
O Neither physical nor chemical changes
O Only physical changes
O Only chemical change
How many grarns would 3 moles of carbon dioxide (CO2) weigh? (round to the
nearest whole number)
Your answer
Mass of CO₂ = 132 g
Further explanationA mole is a number of particles(atoms, molecules, ions) in a substance
This refers to the atomic total of the 12 gr C-12 which is equal to 6.02.10²³, so 1 mole = 6.02.10²³ particles
Can be formulated :
N = n x No
N = number of particles
n = mol
No = 6.02.10²³ = Avogadro's number
mole also can be formulated :
[tex]\tt n=\dfrac{mass}{MW}[/tex]
moles of CO₂ = 3
mass of CO₂(MW=44.01 g/mol) :
[tex]\tt mass=mol\times MW\\\\mass=3\times 44.01\\\\mass=132.03~g\approx 132~g[/tex]
What do the superscripts in an electron configuration represent?
Answer: number of electron in respective sub shell or orbital
Explanation:
In an electron configuration, the superscripts (written as numbers above the orbital symbols) represent the number of electrons present in each orbital. They indicate the distribution of electrons among different energy levels and sublevels within an atom.
What are superscripts?Superscripts are characters or numbers that are positioned slightly above the normal line of text. They are typically smaller in size and are used to indicate various types of information or formatting in written text.
The superscripts are determined based on the rules of filling electron orbitals, such as the Pauli exclusion principle and Hund's rule. These rules govern the arrangement of electrons in the orbitals according to their energy levels and sublevels.
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Which answer correctly identifies the five levels of cell organization from simple to most complex A-bone cell, bone tissue, femur, skeleton, dog B-dog, skeleton, femur, bone tissue, bone cell C-bone tissue, dog, bone cell, femur, skeleton
Answer:
A-bone cell, bone cell C-bone tissue, bone cell bone tissue, femur, skeleton, dog B-dog.
Explanation:
It is ordered from the smallest unit (tissue microstructure) to a tissue or organ that are considered macrotisular structures.
IF the strong nuclear force affects all particles that are close to each other, What will happen if we add two neutrons to our nucleus with two protons?
A) It will decrease the electromagnetic force in the nucleus
B) It will decrease the strong nuclear force in the nucleus
C) It will increase the strong nuclear force in the nucleus
D) It will increase the electromagnetic force in the nucleus
Answer: it will increase the strong nuclear force in the nucleus
Explanation: Labster
Answer : It will increase the strong nuclear force in the nucleus ( C )
Given that the strong nuclear force affects the particles that are close to each other addition of two neutrons and two protons, will cause an increase in the strong nuclear force found in the nucleus . this is because a Nucleus with two ( 2 ) protons exhibits attractive nuclear force and a repulsive coulomb force. and since the nuclear force does not depend on the charge, the addition of two neutrons the attractive nuclear force will increase
Hence we can conclude that addition of two neutrons to our nucleus with two protons will increase the strong nuclear force in the nucleus.
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What characteristic do atoms in the same group of elements share?
1 - they have the same number
2 - they have similar physical property
3 - they have the same atomic mass
4 - the same number of electrons orbitals
Answer:
2 option
Explanation:
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Which ranks the solutions from the strongest to weakest acid?
W X Y Z
Y W X Z
W X Z Y
Y Z X W
Answer:
the answer is the last option yzxw
Explanation:
ph is stronger the lower
Answer:
D: Y → Z → X → W
Explanation:
on edge2021! hope this helps!!~ ー( ´ ▽ ` )ﾉ
What is the charge of Aluminum?
O +3
0 -3
OO
O +1
Answer:
+ 3
Explanation:
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The energy that is associated with the temperature of an object is called?
Answer:
The thermal energy of an object is the energy contained in the motion and vibration of its molecules. Thermal energy is measured through temperature.
Determine the kinetic energy of a 1000-kg roller coaster car that is moving with a speed of 20.0 m/s.
Answer: 200000 J
Explanation:
Formula for kinetic energy: Ek=1/2 *mv^2
m=1000 kg. v=20.0m/s
Ek=1/2 *1000*20^2
Ek=500*400
Ek=200000 J
J=joules
Define "Petrifying Well".
Answer:
Explanation:
A petrifying well is a well which gives objects a stone-like appearance. If an object is placed into such a well and left there for a period of months or years, the object acquires a stony exterior.
The kinetic energy of an object can be determined using the equation , where is the kinetic energy, is the mass, and is the speed of the object. What is the mass of an object moving at a speed of 12 that has 36 J of kinetic energy?
Answer:
0.5kg
Explanation:
Given parameters:
Speed of the object = 12m/s
Kinetic energy = 36J
Unknown:
Mass of the object = ?
Solution:
Kinetic energy is the energy due to the motion of a body. It is mathematically expressed as;
K.E = [tex]\frac{1}{2}[/tex] m v²
Insert the parameters and solve;
36 = [tex]\frac{1}{2}[/tex] x m x 12²
36 = 72m
m = 0.5kg
A museum wants to store their valuable documents in cases that contain a gas that will protect the documents. The museum director should choose
Choose... = chlorine gas, oxygen gas, a noble gas, a halogen.
She should not choose one of the other gases because they are too
Choose... = expensive, reactive, smelly, unreactive.
Answer:
A noble gas, reactive
Explanation:
I'm just too based
Calculate the concentration of hydrogen ion of a sample of vinegar with pH 6.82
The concentration of hydrogen ion of a sample of vinegar : 1.514 x 10⁻⁷
Further explanationpH is the degree of acidity of a solution that depends on the concentration of H⁺ ions. The greater the value the more acidic the solution and the smaller the pH.
So that the two quantities between pH and [H⁺] are inversely proportional because they are associated with negative values.
A solution whose value is different by n has a difference in the concentration of H⁺ ion of 10ⁿ.
pH = - log [H⁺]
pH of a sample vinegar = 6.82
The concentration of hydrogen ion :
[tex]\tt 6.82=-log[H^+]\\\\(H^+]=10^{-6.82}=1.514\times 10^{-7}[/tex]
How does the activity series of metals reflect the stability of metals?
A. The metals lowest on the list are the least stable.
B. The metals highest on the list are the most stable.
C. The metals lowest on the list are the most reactive.
D. The metals highest on the list are the least stable.
The activity series of metals reflect the stability of metals are "the metals highest on the list are the least stable."
What is activity series?The organization of metals in a declining sequence of respective reactivities is referred to as the "activity series," also described as the "reactivity series" of metals.
What is metals?Materials having the qualities of being bright, hard, fusible, malleable, ductile, etc. were known as metals.
The activity series of metals reflect the stability of metals are "the metals highest on the list are the least stable."
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186km at 3:00 the speed limit is 65km/h
He will arrive at the second city on time
Using the formula for calculating speed expressed as:
Distance = Speed * time
Given the following parameters
Speed = 65km/hr
Time = 3 hours (from noon to 3PM)
Get the distance covered by Isaiah;
Distance = 65 * 3
Distance = 195km > 186km
Since the distance covered by Isaiah is greater than the distance from one city to another city, hence he will arrive at the second city on time
What is Speed?
The speed at which an object's location changes in any direction. The distance traveled in relation to the time it took to travel that distance is how speed is defined. Since speed simply has a direction and no magnitude, it is a scalar quantity.
Therefore,
186km at 3:00 the speed limit is 65km/h
He will arrive at the second city on time
Using the formula for calculating speed expressed as:
Distance = Speed * time
Given the following parameters
Speed = 65km/hr
Time = 3 hours (from noon to 3PM)
Get the distance covered by Isaiah;
Distance = 65 * 3
Distance = 195km > 186km
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Which stage of the cell cycle results in two identical cells?
mitosis
cytokinesis
interphase
metaphase
Answer:
B.
Explanation:
what is the Transfer of energy from one object to another through direct contact?
Answer:]
Conduction is the transfer of energy from one molecule to another by direct contact. This transfer occurs when molecules hit against each other, similar to a game of pool where one moving ball strikes another, causing the second to move.
Explanation:
What is incorrect in the structure? Check all that apply. The middle hydrogen is surrounded by 4 electrons. Oxygen is surrounded by 8 electrons. The middle hydrogen is bonded to 2 elements. There are too many electrons in the final structure.
Answer: The middle hydrogen is surrounded by 4 electrons, the middle hydrogen is bonded to 2 elements, and there are too many electrons in the final structure are correct.
Explanation: I just did this question and got the correct answers.
The incomplete points about the structure H—H-O: is that the middle hydrogen is surrounded by 4 electrons, the middle hydrogen is bonded to 2 elements, and there are too many electrons in the final structure are correct.
For better understanding let's explain the Lewis structure
Lewis Structure is simply showing or the representation of a molecule that tell use how the valence electrons are putt in place (arrange) among the atoms in the molecule.From the above we can therefore say that the answer The incomplete points about the structure H—H-O: is that the middle hydrogen is surrounded by 4 electrons, the middle hydrogen is bonded to 2 elements, and there are too many electrons in the final structure, is correct.
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Help with number 4??????????? Asap
Answer:
it's A I think
Explanation:
hope u pass on this homework
If two wave crests overlap each other and one has an amplitude of 5 and the other has an amplitude of 3, what is the interference that is created?
Answer:
The interference is 8
Explanation:
What is the frequency of a 7.43e-5 m wave?
2.23e3 Hz
4.04e12 Hz
2.48e-13 Hz
None of the above
Answer:
None of the above!
Explanation:
Use the portion of the periodic table shown at the bottom to answer the questions.
Part 1: Name two elements that have the same properties as magnesium (Mg).
Part 2: Determine the number of protons, electrons, and neutrons present in an atom of potassium (K). Explain how you determined your answer using complete sentences.
Answer:
Part 1 calcium and strontium have same properties as magnesium because all three are in same group.
Part 2 As atomic number of potassium is 19 so it contains 19 protons and 19 electrons because it is neutral
Potassium has 20 neutrons because its mass is 39
We can find neutron = atomic mass - atomic number
Explanation:
ca2 -calmodulin-dependent facilitation and ca2 inactivation of ca2 release-activated ca2 channels
This article aims to find that [tex]Ca^{2+}[/tex] occupancy of a site on the extracellular side of the CRAC channel ordinarily potentiates its [tex]Ca^{2+}[/tex] as well as [tex]Na^{+}[/tex] currents, and [tex]Ca^{2+}[/tex] dissociation from this site is responsible for the inactivation of its [tex]Na^{+}[/tex] current.
The most extensively studied of the store-operated ion channels, which are widely expressed and crucial to many vital biological processes, is the [tex]Ca^{2+}[/tex] release-activated [tex]Ca^{2+}[/tex] (CRAC) channel. But little is known about the CRAC channel's molecular makeup or how intracellular or extracellular messengers control it.
It becomes more permeable to monovalent cations with a higher current when extracellular divalent cations are absent, however this monovalent cation current quickly deactivates due to an unidentified mechanism.
Here, it was found that [tex]Ca^{2+}[/tex] occupancy of a site on the extracellular side of the CRAC channel ordinarily potentiates both its [tex]Ca^{2+}[/tex] and [tex]Na^{+}[/tex] currents. [tex]Ca^{2+}[/tex] dissociation from this site, however, results in the inactivation of the channel's [tex]Na^{+}[/tex] current. This [tex]Ca^{2+}[/tex]-dependent potentiation is required for the normal functioning of CRAC channels.
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how many electrons does cobalt lose/donate?
Answer:
Cobalt lose 3 electrons and donate 12 electrons.
Explanation:
In the periodic table,cobalt has nine electrons .It has lost 3 electrons,so it is only six left.Once it forms the complex,each ammonia donates a pair of electrons.
Can someone explain a method to help convert different units of measurement to another? For example, centimeters to kiloliters? My teacher uses a chart method but it's a little confusing. Can anyone help?
Answer:
Compare your two units. The two units must measure the same thing.
For example, in the problem "convert 2 inches into centimeters," both inches and centimeters measure length. If your units measure two different things (like length and weight), you can't convert between them.
or
Look up the conversion. Before you can do the math, you need to know how much larger one unit is than the other.If the conversion you find has many decimal places, round to the nearest significant digit. If you don't know what a significant digit is, round to the second or third digit.
For example, if you need to convert 2 inches to centimeters, you need to know that 1 inch = 2.54 centimeters.
Explanation:
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A marble is given potential energy by being placed at Location W. When the marble released, it rolls down the track.
At which location does the marble have maximum kinetic energy?
A Location w
B Location X
C Location Y
D Location 2
Answer:the answer is c , location Y
The location at which the marble have maximum kinetic energy is location Y.
What is conservation of energy?Conservation of energy states that total energy of the system doen not change else the one form of energy is converted into another form within the system.
In the given diagram it is mention that potential energy of marble is highest at the location W as potential energy is directly proportional to the height. But when the marble rolls down it attains the kinetic energy and potential energy decreases.
According to the law of conservation at point Y potential energy is minimum, so that kinetic energy becomes maximum at this point.
Hence at location Y marble have maximum kinetic energy.
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You are on a road trip to San Francisco. You drove 200 miles in 3 hours, and then stopped for lunch for
30 minutes. After lunch, you traveled 150 miles in an hour and a half. What was your average speed
for this trip? SHOW YOUR WORK!
a. Calculate the average speed including the time spent for lunch.
b. Calculate the average speed without the lunch stop
Answer:
Explanation:
a)
Average speed is total distance over change in time.
So
total distance=(200+150)
=350
total time=(3+0.5+1.5)
=5
350 km/5 hours
70km/hour
Therefore:
70 km/h is the average speed
b)
total distance=(200+150)
=350
total time=(3+1.5)
=4.5
350/4.5
=approx. 77.77 km/hour
Therefore:
77.77/hour is the average speed
Don't know if you round but uh yeah
A 25.0 mL sample of 0.100 M lactic acid (HC3H503, Ka = 1.4 E-4) is titrated with 0.100 M NaOH solution. Calculate the pH of the resulting
solution after 0.0ml of NaOH have been added
Is the substance in the chart a metal or non metal? Explain.
Answer:
Nonmetal
Explanation:
A substance in the chart is a nonmetal because nonmetals are not water soluble, they are poor conductors of heat and electricity and they do not have high melting points like metals.