Litmus turns
in acidic solutions.
green
yellow
blue
red
Answer:
red
Explanation:
red shows if solution is acidic
As you move from left to right within a period (row), what is the pattern?
find the number of neutron electron and proton in the nuclide 18.Ar40
Answer: The number of neutron electron and proton in the nuclide [tex]_{18}^{40}\textrm {Ar}[/tex] is 22, 18 and 18.
Explanation:
Atomic number is equal to the number of protons or number of electrons for a neutral species and is specific to a particular element.
Mass number is the sum of number of protons and the number of neutrons.
Here the atomic number of Argon is 18 , thus the number of protons is 18 and thus the number of electrons is also 18.
The given mass number is 40. Thus number of neutrons = (40 - 18) = 22.
The number of neutron electron and proton in the nuclide [tex]_{18}^{40}\textrm {Ar}[/tex] is 22, 18 and 18.
_______ in saliva start the chemical digestion process
Answer:
amylase
Explanation:
A cliff near the water has been worn away. How did erosion change the shape of the land?
Answer:
E
Explanation:
E
Erosion often change the shape of the land. Just as water and wind pass across land, they often carry away grains of soil and wear down rock. Years of this continuous process therefore reduces the size of the cliff, hills and mountains. It often cuts through the ground to form valleys, canyons and ditches.
Water erosion help shape the land also through water movement across the earth in streams and rivers carrying along soil and breaks down pieces of rock in a process called erosion.Water erosion result in loss of topsoil, reduced crop yields, damaged infrastructure, weed dispersal etc.
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When adding electrons to a level,sublevel, or orbital there are three rules that need to be followed. Choose the correct definition for each rule.
Answer:
Aufbau Principle: Electrons occupy orbitals of lower energy first.
Pauli Exclusion Principle: An orbital can hold only two electrons and they must have opposite spin.
Hund's Rule: Electrons fill each orbital singly before any orbital gets a second electron.
Evaluate three communication skills that can assist you in sustaining positive relationships
1. Accept and celebrate differences. One of the biggest challenges we experience in relationships is that we are all different. We can perceive the world in many ways. Certainly astumbling block that we come across when we try to build relationships is a desire or an expectation that people will think like we do and, in this way, it is so much easier to create a rapport. We feel more comfortable when we feel that people “get” us and can see our point of view. Life, however, would be very dull if we were all the same and, while we may find it initially easier, the novelty of sameness soon would wear off. So accepting and celebrating that we are all different is a great starting point.
2. Listen effectively. Listening is a crucial skill in boosting another person’s self-esteem, the silent form of flattery that makes people feel supported and valued. Listening and understanding what others communicate to us is the most important part of successful interaction and vice versa.
Active or reflective listening is the single most useful and important listening skill. In active listening, we also are genuinely interested in understanding what the other person is thinking, feeling, wanting, or what the message means, and we are active in checking out our understanding before we respond with our own new message. We restate or paraphrase our understanding of their message and reflect it back to the sender for verification. This verification or feedback process is what distinguishes active listening and makes it effective.
3. Give people your time. Giving time to people is also a huge gift. In a world where time is of the essence and we are trying to fit in more than one lifetime, we don’t always have the time to give to our loved ones, friends, and work colleagues. Technology has somewhat eroded our ability to build real rapport and we attempt to multi-task by texting and talking at the same time.
Being present in the time you give to people is also important, so that, when you are with someone, you are truly with someone and not dwelling in the past or worrying about the future. The connection we make with other people is the verytouchstone of our existence, and devoting time, energy, and effort to developing and building relationships is one of the most valuable life skills.
How would you describe the elements from Group 1 to Group 12 in the periodic
table?
Answer:
Excluding hydrogen in group 1, metals
Explanation:
All the elements from group 1 to 12, excluding hydrogen at the top of group 1 are all metals
what is the relationship between heat and temperature?
*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆**☆*――*☆*――*☆*――*☆
Answer: according to ck12.org "Heat is the sum of all the kinetic energies of all the molecules of an object, while temperature is the average kinetic energy of the molecules of an object."
Explanation:
I hope this helped!
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Explain why only one type of seismic wave was recorded at location B. (1 sentence only!)
Answer:
p wave
Explanation:
The P wave is designated the primary preliminary wave because it is the first to arrive at a seismic station after an earthquake. It travels at a speed usually less than 6 kilometers per second in the Earth's crust and jumps to 13 kilometers per second through the core.
a repelling force occurs between two charged objects when the charges are
Answer:
Like signs.
Explanation:
When two charges are like signs, a repelling force will occur.
3Li HPO
How many elements?
How many Atoms of Lithium (Li)?
How many Atoms of Hydrogen (H)?
How many Atoms of Phosphorus (P)?
How many Atoms of Oxygen (0)?
How many total Atoms in this Chemical Formula?
1 2 3 4 5
Answer:
1) There are Four Elements
Li , H , P , O
2) Li have 3 atoms.
3) H have 3 atoms.
4) P have 3 atoms.
5) O have 3 atoms.
what do solar power produced
Answer:
Solar technologies convert sunlight into electrical energy either through photovoltaic (PV) panels or through mirrors that concentrate solar radiation. This energy can be used to generate electricity or be stored in batteries or thermal storage.
Explanation:
Explain the relationship between the following terms: eutrophication, nutrients, dissolved oxygen leads, and algae.
Answer:
Eutrophication is the enrichment of a body of water with excessive nutrients (nitrogen and phosphorus), which causes algal growth and subsequent decline of dissolved oxygen after decomposition.
Which of the following best defines a spectrum?
A. The range of values of some property
B. The measurement of some property
C. A single value of some property
D. The change over time in the value of some property
SUBMIT
Answer:
The range of values of some property
Explanation:
A.pex, and the comments on the other answer
The best defines a spectrum is The range of values of some.
What is spectrum ?
A spectrum (plural spectra or spectrums) is a condition that is not limited to a specific set of values but can vary, without gaps, across a continuum. The word was first used scientifically in optics to describe the rainbow of colors in visible light after passing through a prism. As scientific understanding of light advanced, it came to apply to the entire electromagnetic spectrum. It thereby became a mapping of a range of magnitudes (wavelengths) to a range of qualities, which are the perceived "colors of the rainbow" and other properties which correspond to wavelengths that lie outside of the visible light spectrum.
Spectrum has since been applied by analogy to topics outside optics. Thus, one might talk about the "spectrum of political opinion", or the "spectrum of activity" of a drug, or the "autism spectrum". In these uses, values within a spectrum may not be associated with precisely quantifiable numbers or definitions. Such uses imply a broad range of conditions or behaviors grouped together and studied under a single title for ease of discussion. Nonscientific uses of the term spectrum are sometimes misleading. For instance, a single left–right spectrum of political opinion does not capture the full range of people's political beliefs. Political scientists use a variety of biaxial and multiaxial systems to more accurately characterize political opinion.
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How many milliliters of 3.0 M H2SO4 are needed to make 450 mL of 0.10 M H2SO4?
A woman weighing 600 N is leaning on the ground with shoe soles with a total area of 0.04 m2. Calculate the pressure of the motors
Answer:
1.5×10^4
Explanation:
Pressure= force/area
P= 600/0.04
P= 15000
P= 1.5×10^4
Consider the titration of 82.0 mL of 0.140 M Ba(OH)2 by 0.560 M HCl. Calculate the pH of the resulting solution after the following volumes of HCl have been added. (a) 0.0 mL WebAssign will check your answer for the correct number of significant figures. 13.447 Correct: Your answer is correct. (b) 15.0 mL WebAssign will check your answer for the correct number of significant figures. 12.25 Incorrect: Your answer is incorrect.
Answer:
a) pH = 13.447
b) pH = 13.176
Explanation:
Ba (OH)₂ is a strong base and ionizes completely in solution to give barium amend hydroxide ions.
The equation of the dissociation of Ba(OH)₂ is given below:
Ba(OH)₂ ----> Ba2+ + 2OH-
1 mole of Ba(OH)₂ produces 2 Moles of OH- ions
a) Before the addition of HCl, i.e.,when 0.00 mL of HCl has been added;
Concentration of hydroxide ions, [OH-] = 0.140 x 2 = 0.a) [OH-] = 0.100 x 2 = 0.280
pOH = -log [OH-]
pOH = -log (0.280)
pOH = 0.553
pH = 14 - 0.553= 13.447
b) pH when 15.0 mL HCl has been added
Moles Ba(OH)₂ = concentration × volume
Volume of Ba(OH)₂ = 82.0 mL = 0.082 L, concentration = 0.140 M
moles of Ba(OH)₂ = 0.082 x 0.140 = 0.01148 moles
moles OH- produced by 0.01148 moles of Ba(OH)₂ = 2 x 0.01148= 0.02296
moles HCl = 0.0150 L x 0.560 = 0.0084
moles of H+ produced by 0.0084 HCl = 0.0084
0.0084 H+ willnreact with 0.0084 moles of OH-
moles OH- left after the reaction = 0.02296 - 0.0084 = 0.01456 moles
total volume of new solution = (82 +15) mL = 97 mL => 0.097 L
Concentration of OH- ions = moles / volume
[OH-] = 0.01456 / 0.097 = 0.1501
pOH = -log [OH-]
pOH = -log (0.150)
pOH = 0.824
pH = 14 - 0.824
pH = 13.176
KClO3 (s) KCl (s) + 02 (g)
How do you balance this equation
Answer:
2KCl(s) + 6O3O2
Explanation:
I think it's correct
how can a match light without a spark
Answer:
Use friction
Explanation:
Friction is the force that stops something in motion. It also heats up something, creating a gravitational heat! A match striked against the lighter will create a flame, because of friction :)
help please asap if your good at chemistry
what is Ammonia Conductivity in Solution?
a.light bulb shines brightly
b.light bulb shines dimly
c.light bulb doesn't shine
and explain why you chose that answer.
Answer:
you siad i can answer with anything :)
A sealed balloon occupies a volume of 250 mL at an unknown temperature. When the temperature is altered to 30 C, the balloon's volume becomes 0.5 L. Calculate the initial temperature of the air in the balloon.
Answer:
Initial temperature, T1 = 15°C
Explanation:
Given the following data;
Initial volume, V1 = 250 mL to Liters = 250/1000 = 0.25 L
Final temperature, T2 = 30°C
Final volume, V2 = 0.5 L
To find the initial temperature T1, we would use Charles' law.
Charles states that when the pressure of an ideal gas is kept constant, the volume of the gas is directly proportional to the absolute temperature of the gas.
Mathematically, Charles is given by;
[tex] \frac {V}{T} = K[/tex]
[tex] \frac{V1}{T1} = \frac{V2}{T2}[/tex]
Making T1 the subject of formula, we have;
[tex] T_{1}= \frac{V_{1}}{V_{2}} * T_{2}[/tex]
Substituting into the formula, we have;
[tex] T_{1}= \frac{0.25}{0.5} * 30[/tex]
[tex] T_{1}= 0.5 * 30 [/tex]
Initial temperature, T1 = 15°C
Select the correct answer. Which of the below is an example of mimicry that enables prey species avoid predation
What are the answers? I assume you meant to attach a photo.
Answer:
Thus, the one that is an example of mimicry that enables prey species to avoid predation is a harmless organism imitating the look of a harmful one (option B).
Explanation:
Consider the reaction.
HCl(aq) + KOH(aq) ⟶ KCl(aq) + H2O(l)
In the reaction shown, HCl is
Answer:
the acid used to neutralize the base in oder to form a salt and water
Can someone help me with this. Thank you
Answer:
Location x is experiencing daytime because it is facing directly to the sun.
Explanation:
From a background understanding of the solar system, the side of the planet facing the sun will be experiencing daytime while the other side of the planet will be experiencing either partial or total darkness depending on the location.
From the diagram given above, we can see clearly that location x is facing the sun and as such, light rays from the sun lightens the location. When this happens, location x will be experiencing daytime.
In conclusion, location x is experiencing daytime because it is facing directly to the sun.
Which explanation correctly describes why it is important for a cell’s surface-area-to-volume ratio to not be too small?
A. The area of the cell membrane needs to be large in comparison to the volume so the cell is able to move nutrients and wastes through it.
B. The cell would starve.
C. The cell would not produce enough waste material.
D. The organelles would grow too large to fit within the cell.
If a compound contains a poly atomic ion then what type of compound is it A. Convalent Compound B. Ionic Compound
Answer:
B. Ionic Compound
Explanation:
An ionic compound is that compound which contains a positively charged ion called CATION and a negatively charged ion called ANION. The cation loses or transfers electrons to the anion, hence, making the former (cation) positive and the latter (anion) negative.
A polyatomic ion is an ion that contains more than one type of atom e.g OH-, NO3²-, CO3²- etc. A polyatomic ion usually has an overall charge formed from the charges of the individual atoms that makes it up. For example, in OH-, the overall charge is -1.
Since a polyatomic ion can have an overall positive or negative charge, it must enter a reaction with another ion that complements it i.e. a negative polyatomic ion will react with a positive ion to neutralize its charge. Hence, this forms an IONIC COMPOUND. This is why most compounds with polyatomic ions are IONIC COMPOUNDS.
For example, CaCO3 is an ionic compound formed when Ca²+ (cation) reacts with the polyatomic anion: CO3²-
how is hydroxyl group of alcohol different from the hydroxyl group of alkalis ?
Answer:
Difference between hydroxyl group of alcohol and hydroxyl group of alkalis is as following: Hydroxyl group of alcohol is composed of carbon, oxygen and hydrogen atoms while hydroxyl group of alkalis composed of one alkali group, hydrogen and oxygen atom.
The magnetic field is stronger away from the magnet true or false
Answer:
Big False
Explanation:
As the magnets get closer, the stronger the magnetic field. The farther away, the less strength the field exhibits.
A beaker contains 1.0 M NaOH(aq) solution. To produce a NaOH(aq) solution of molar concentration 0.20 M, we transfer 2.0 ml (cm^3) out of this beaker into a 25 ml cylinder and add distilled water until the total volume reading becomes
A) 12ml
B)10ml
C)8ml
D)5ml
E)2ml
Answer: B) 10 ml
Explanation:
According to the dilution law,
[tex]M_1V_1=M_2V_2[/tex]
where,
[tex]M_1[/tex] = molarity of stock [tex]NaOH[/tex] solution = 1.0 M
[tex]V_1[/tex] = volume of stock [tex]NaOH[/tex] solution = 2.0 ml
[tex]M_1[/tex] = molarity of dilute [tex]NaOH[/tex] solution = 0.20 M
[tex]V_1[/tex] = volume of diluted [tex]NaOH[/tex] solution = ?
Putting in the values we get:
[tex]1.0\times 2.0=0.20\times V_2[/tex]
[tex]V_2=10ml[/tex]
Therefore, final volume reading is 10 ml