Answers
Answer:
lower mantle
Explanation:
because the core and the crust are solid.
Answer:
C. Outer Core
Explanation:
the Outer core and lower mantle are the only liquid parts of earths layers.
Related Questions
How many neutrons are in the nucleus of a chlorine-35 isotope?
Answers
Answer:
The answer is 18
Explanation:
Other atoms of chlorine may have 20 neutrons in the nucleus. These atoms of chlorine have different atomic mass numbers. The isotope that has 18 neutrons has an atomic mass number of 35.
A sample of xenon gas occupies a volume of 5.82 L at 453 K. If the pressure remains constant, at what temperature will this same xenon gas sample have a volume of 2.64 L?
Answers
Answer:
204.8 K
Explanation:
(P1 * V1)/T1 = (P2 * V2)/T2
"If the pressure remains constant" means
you can cancel the pressure part of the equation
T2 = (V2 * T1)/(V1)
T2 = (2.64 L * 453 K)/(5.82 L)
T2 = 204.8 K
chatgpt
A sample of xenon gas occupies a volume of 5.82 L at 453 K. If the pressure remains constant, the temperature that will make this same xenon gas sample have a volume of 2.64 L is 220K.
What is combined gas law?The combined gas law is the law of of gaseous state which is made by combination of Boyle's law, Charle's law, Avogadro's law and Gay Lussac's law.
It is a mathematical expression that relates Pressure, Volume and Temperature.
(P1 × V1)÷T1 = (P2 × V2)÷T2
We can also use the following relation-
PV = nRT
At constant pressure,
V1÷T1 = V2÷T2
This is Charles's law.
V1 = 5.82L
T1 = 453K
V2 = 2.64L
T2 = ?
T2 = 220K
Therefore, A sample of xenon gas occupies a volume of 5.82 L at 453 K. If the pressure remains constant, the temperature that will make this same xenon gas sample have a volume of 2.64 L is 220K.
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Is this equation balanced?
3kBr + FeCl3 -> FeBr + 3KCl
A) No, it’s not balanced. The K atoms are not balanced.
B) Yes, it’s balanced.
C) No, it’s not balanced. The Br atoms are not balanced.
D) No, it’s not balanced. The Fe atoms are not balanced.
Answers
The balanced equation should be:
3KBr + FeCl3 → FeBr3 + 3KCl
In the balanced equation, both the number of Fe and Br atoms are equal on both sides of the equation.
Answer:
The given equation is not balanced.
On the left-hand side, there are 3 atoms of potassium (3K), 3 atoms of bromine (3Br), and 1 atom of iron (Fe).
On the right-hand side, there is 1 atom of bromine (Br), 3 atoms of potassium (3K), and 1 atom of iron (Fe).
The number of atoms of each element should be equal on both sides of the equation. Therefore, to balance the equation, we need to adjust the coefficients of the molecules.
The balanced equation is:
3kBr + FeCl3 -> FeBr3 + 3KCl
The balanced equation has 3 atoms of potassium (3K), 3 atoms of bromine (3Br), 1 atom of iron (Fe), and 3 atoms of chlorine (3Cl) on both sides of the equation.
In a science demonstration, a teacher mixed zinc (Zn) with hydrogen chloride (HCl) in a flask and quickly attached a balloon over the mouth of the flask. Bubbles formed in the solution and the balloon inflated.
What most likely occurred during this demonstration?
a.The Zn and HCl both retained their identity.
b.Either Zn or HCl, but not both, retained its identity.
c.Evaporation of one of the substances occurred.
d.One or more new substances formed.
Answers
Answer:
a. The Zn and HCl both retained their identity.
Which of the following insoluble salts would you expect to dissolve upon the addition of nitric acid?(a) CaF2(b) NiS(c) Ag3PO4(d) AgCl(e) BaSO4(e) All would dissolve with the addition of acid.(f) None of these would dissolve upon the addition of acid.
Answers
Highly potent acid HNO₃ is. The oxidizing agent also uses it. CaF₂, NiS, Ag₃PO₄, AgCl, and BaSO₄ are the insoluble salts in this example.CaF₂, NiS, Ag₃PO₄ are dissolved, and AgCl and BaSO₄ not dissolved in HNO₃.
An oxidizing agent is a material in a redox chemical process that obtains or "accepts"/"receives" an electron from a reducing agent (also known as an oxidant, oxidizer, electron recipient, or electron acceptor) (called the reductant, reducer, or electron donor). Or to put it another way, an oxidizer is anything that oxidizes something else. This is described by saying that oxidizers "undergo reduction" and "are reduced" whereas reducers "undergo oxidation" and "are oxidized." The oxidation state, which characterizes the degree of electron loss, of the oxidizer falls while that of the reductant increases. The three most common oxidizing substances are oxygen, hydrogen peroxide, and halogens.
An oxidizing agent is a chemical species that goes through a chemical reaction in which it obtains one or more electrons, to put it simply.
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which element has the electrons configuration 1s22s22p63s23p64s23d104p2
Answers
The element with the electron configuration 1s22s22p63s23p64s23d104p2 is Silicon (Si).
Explanation:
The electron configuration of an element describes the arrangement of electrons in its atoms. The numbers and letters in the configuration represent the energy levels (n), sublevels (s, p, d, f), and the number of electrons in each sublevel.
In this case, the electron configuration of the element is:
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p2
Breaking this down, we can see that the element has:
- 2 electrons in the 1s sublevel
- 2 electrons in the 2s sublevel
- 6 electrons in the 2p sublevel
- 2 electrons in the 3s sublevel
- 6 electrons in the 3p sublevel
- 2 electrons in the 4s sublevel
- 10 electrons in the 3d sublevel
- 2 electrons in the 4p sublevel
Based on the number of electrons in the outermost energy level (valence electrons), we can determine that this element is in group 14 of the periodic table. Looking at the periodic table, we can see that the
A neon sign contains 2.01 X 1021 atoms of the gas. How many moles of neon are in the sign?
a
1.21 X 1045 mole Ne
b
3.34 X 10-3 mole Ne
c
2.00 X 102 mole Ne
d
12.10 X 102 mole Ne
Answers
Answer:
b. 3.34 x 10^-3
Explanation:
According to Avogadro's constant, in one mole, there are 6.02 x 10^23 atoms. To see how many moles are in 2.01 x 10^21 atoms, you would divide it by the amount of atoms that fit in a mole.
2.01 x 10^21 atoms / 6.02 x 10^23 = 0.00334 moles, which can be
converted to 3.34 x 10^-3 moles
Digestive enzymes in saliva begin breaking down starch into simple sugars in our mouths. Soda crackers are mostly starch. As you chew a soda cracker, the enzymes in your saliva begin to break down the starch into sugars. Benedict's solution is an easy way to test for glucose, a simple sugar. Benedict's solution is blue with no glucose present, yellow with a slight amount of glucose present, orange or green with a medium amount of glucose present, and dark red with much glucose present. Test a soda cracker for starch with a drop of iodine solution. The blue-black color indicates starch is present in the cracker.
OBJECTIVES
Investigate the effect of saliva enzymes on the digestion of starch.
These materials are needed:
soda crackers
Benedict's solution
4 test tubes
beaker or small saucepan
burner; either a stove burner, an alcohol lamp, or a Bunsen burner
Procedure: (View and print a copy of the procedure.)
Start a water bath and heat it to a very gentle boil. This may consist of a beaker 1/2 full of water heated by an alcohol lamp, Bunsen burner, or small saucepan 1/2 full of water heated on a stove burner.
Pour about 1/4" (or about 3 ml) of Benedict's solution into each of four test tubes. Mark these test tubes as "1", "2", "3", and "4" with a black crayon or pencil.
Finely crush 1/4 of a soda cracker. Mix the crushed cracker thoroughly with a little water until it becomes a paste. Pour this cracker-water mixture into test tube #1. Cover the test tube with your thumb, and shake it well.
Rinse your mouth well with water. Chew 1/4 of a soda cracker in your mouth for about 5 seconds, and then spit the cracker into test tube #2. Cover the test tube with your thumb, and shake it well.
Rinse your mouth well with water. Chew 1/4 of a soda cracker in your mouth for about 30 seconds, mixing it well with saliva, then spit the cracker into test tube #3. Cover the test tube with your thumb, and shake it well.
Rinse your mouth well with water. Chew 1/4 of a soda cracker in your mouth for about 60 seconds, mixing it well with saliva, then spit the cracker into test tube #4. Cover the test tube with your thumb, and shake it well.
Place all 4 test tubes in the hot water bath for about 3 minutes or until they just begin to boil. Carefully remove the test tubes from the water bath and note the color of each. Based on the color changes, which test tube had the least glucose present? Which one had the most glucose present? Why?
Carefully note the color changes in each solution sample:
No Saliva
Chewing 5 seconds
Chewing 30 seconds
Chewing 60 seconds
As you chewed the cracker longer, what happened to the amount of starch left in the cracker?
As you chewed the cracker longer, what happened to the color of the solutions?
Benedict's solution is a test for a simple sugar called glucose. The more red the color, the more glucose that is in the test substance. What does this investigation show?
Answers
The food you eat needs to be broken down by digestive enzymes. These proteins hasten the chemical processes that transform food into compounds that can be absorbed by your digestive system.
Thus, There are digesting enzymes in your saliva. They are also expelled by a few of your organs, such as the liver, gallbladder, and pancreas.
This occurs when your small intestine doesn't produce enough lactase, an enzyme that breaks down lactose, a natural sugar found in milk.
When lactase levels are low, lactose from dairy products you consume goes straight to your colon rather than being absorbed by your body. After then, it mixes with bacteria to produce unpleasant stomach symptoms and enzymes.
You have a gene that predisposes you to lactose intolerance. The gene is most prevalent in individuals with African, Asian, or Hispanic ancestry. As a youngster, your lactase levels abruptly decrease and digestive system.
Thus, The food you eat needs to be broken down by digestive enzymes. These proteins hasten the chemical processes that transform food into compounds that can be absorbed by your digestive system.
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I need help in this question, i know that the concentration of H30+ in the propanoic acid is 1.5*10^-3
Answers
The concentration of ammonia in the solution is calculated as 4.48*10⁻⁴ M.
What is meant by concentration?In chemistry, the abundance of constituent divided by total volume of a mixture is known as concentration.
C₃H₇COOH + NH⁴⁺ ⇌ C₃H₇COOH⁻ + NH⁴⁺
The propanoic acid (C3H7COOH) is a weak acid with known Ka value (1.3*10^-5), so we use the Henderson-Hasselbalch equation to calculate concentration of the acetate ion (C3H7COO-) in the solution:
pKa = -log(Ka) = -log(1.3*10⁻⁵) = 4.89
pH = pKa + log([C₃H₇COO-]/[C₃H₇COOH])
[C₃H₇COOH] = 0.18 M
[C₃H₇COOH-] = Ka*[C₃H₇COOH]/[H+] = (1.310⁻⁵)(0.18)/10^-pH
Kb = [ NH⁴⁺][OH⁻]/[NH₃]
Kb = [NH⁴⁺][OH⁻]/[NH₃] ≈ [NH⁴⁺][OH⁻]/0
[OH⁻] = Kb*[NH₃]/[NH⁴⁺] = (1.7610⁻⁵)[NH3]/0.18
[H⁺][OH-] = 1.0*10⁻¹⁴
[H⁺] = 10^-pH
NH₃] = [OH⁻] = 1.010^-14/[H⁺] - 2.4910⁻⁷
[NH₃] = 4.48*10⁻⁴ M
Therefore, the concentration of ammonia in the solution is 4.48*10⁻⁴ M.
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Stephan’s mother cuts a twig from a rose bush and plants it in the soil. After a few days, Stephan observes a new plant growing. Which characteristic does the growth of the new plant depict?
Answers
The growth of the new plant depicts the asexual reproduction characteristic. The characteristic that describes the growth of the new plant in Stephan's mother cutting a twig from a rose bush and planting it in the soil is asexual reproduction.
Asexual reproduction is the mode of reproduction by which organisms generate offspring that are identical to the parent's without the fusion of gametes. Asexual reproduction is a type of reproduction in which the offspring is produced from a single parent.
The offspring created are clones of the parent plant, meaning they are identical to the parent.The new plant in Stephan’s mother cutting a twig from a rose bush and planting it in the soil depicts the process of asexual reproduction, which is the ability of a plant to reproduce without seeds. In asexual reproduction, plants can reproduce vegetatively by cloning themselves using their roots, bulbs, or stems.
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help! help! plz.......... which important property did mendelea use to classify his elements in the period table and did he stick to that
Answers
Answer:
He used atomic weight as his basis and then arranged the known elements, the weight steadily increasing as it went on. He DID stick to the basis, leaving blank spaces for unknown elements. Hope this helps a lot!
Explanation:
A solution of 62.4 g of a covalent compound in enough water to make 1.000 L of solution has an osmotic pressure of 0.305 atm at 25°C. Assume the covalent compound does not dissociate in the solution. Based on these data, what is the molar mass (in g/mol) of covalent? Round your answer to the nearest whole number and do not include units with your answer.
Answers
Answer:
4.99 × 10³ g/mol
Explanation:
Step 1: Given and required data
Mass of the covalent compound (m): 62.4 gVolume of the solution (V): 1.000 LOsmotic pressure (π): 0.305 atmTemperature (T): 25°C = 298 KStep 2: Calculate the molarity (M) of the solution
The osmotic pressure is a colligative pressure. For a covalent compound, it can be calculated using the following expression.
π = M × R × T
M = π / R × T
M = 0.305 atm / (0.0821 atm.L/mol.K) × 298 K
M = 0.0125 M
Step 3: Calculate the moles of solute (n)
We will use the definition of molarity.
M = n / V
n = M × V
n = 0.0125 mol/L × 1.000 L = 0.0125 mol
Step 4: Calculate the molar mass of the compound
0.0125 moles of the compound weigh 62.4 g. The molar mass is:
62.4 g/0.0125 mol = 4.99 × 10³ g/mol
Which two statements describe a way that an other-feeder gets food?
A. Sphagnum moss takes in energy from sunlight.
B. Paramecia sweep food into mouthlike openings.
C. A bear eats the fish that it catches.
D. A. pine tree carriers out photosynthesis.
Answers
Paramecia sweep food into mouthlike openings and a pine tree carriers out photosynthesis. These describe a way that an other-feeder gets food. The correct option is option B,D.
Filter feeders are a subclass of animals that eat by sifting food particles and suspended materials from water, often by running the water through a specially designed filtering apparatus. Baleen whales, clams, krill, sponges, various fish (including some sharks), and krill are just a few species that adopt this technique of eating. Paramecia sweep food into mouthlike openings and a pine tree carriers out photosynthesis. These describe a way that an other-feeder gets food.
Therefore, the correct option is option B,D.
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how do you calculate metal density?
Answers
Answer:
You can divide the mass by the volume to calculate the density of the metal
Explanation:
systematic name for HBr(aq) is
Answers
Hydrobromic acid...
I hope that it helps you...
Use the equation to answer the following question.
2H₂ + O₂ → 2H₂O
How many grams of H₂O are produced from 64.0 g of O₂?
O A. 72.1 g
Answers
Answer:
rsghkm vumm
Explanation:
el correo de confirmación con la que se ha enviado desde correo ok recibido gracias saludos María del Ca
Dr. Laila Malik has been tasked to help her graduate student with making a ground-breaking molecule, but she has to start with helping the student understand how different elements bond to each other and the characteristics they have. Help Dr. Malik identify whether the following compounds are ionic or covalent: CO2
Answers
Carbon dioxide is a covalent compound since it contains two covalent bonds between the oxygen atoms and the carbon atom.
What is a covalent compound?A covalent compound is any substance formed by non-metal atoms, such as in this case carbon and oxygen, that share electrons to achieve stability. Examples of covalent compounds also include water and methane.
Therefore, with this data, we can see that a covalent compounds are formed by non metal atoms that share electrons to form molecules that can be defined by this type of strong chemical interaction in nature
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Use the following balanced reaction to solve 1-3:
P4 (s) + 6H2 (g) → 4PH3 (g)
How many grams of phosphorus trihydride will be formed by reacting 60 L of Hydrogen gas with an excess of P4?
Answers
Answer:
60.86 g of PH₃
Explanation:
We'll begin by calculating the number of mole of H₂ that will occupy 60 L. This can be obtained as follow:
22.4 L = 1 mole of H₂
Therefore,
60 L = 60 / 22.4
60 L = 2.68 mole of H₂.
Next, we shall determine the number of mole of PH₃ produced by the reaction of 60 L (i.e 2.68 mole) of H₂. This can be obtained as follow:
P₄ + 6H₂ –> 4PH₃
From the balanced equation above,
6 moles of H₂ reacted to produce 4 moles of PH₃.
Therefore, 2.68 moles of H₂ will react to to produce = (2.68 × 4)/6 = 1.79 moles of PH₃.
Finally, we shall determine the mass of 1.79 moles of PH₃. This can be obtained as follow:
Mole of PH₃ = 1.79 moles
Molar mass of PH₃ = 31 + (3×1)
= 31 + 3 = 34 g/mol
Mass of PH₃ =?
Mass = mole × molar mass
Mass of PH₃ = 1.79 × 34
Mass of PH₃ = 60.86 g
Thus, 60.86 g of PH₃ were obtained from the reaction.
what is the only reaction alkanes undergo?
Answers
Answer:
The main reaction alkanes undergo is combustion
Explanation:
what adaptation help protect a cactus against herbivores
Answers
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.
An atom has 14 protons, 16 neutrons, and 14 electrons. What is its mass number?
Answers
The answer is 30.
Explanation:
The total number of protons and neutrons in a nucleus is called mass number. So 14 proton plus 16 neutron is = 30 mass number.
How many protons and electrons are there in a neutral atom of each of the following elements?lithiumExpress your answer as an integer.Np=Ne=
Answers
ANSWER
\(\text{ N}_p\text{ = N}_e\text{ = 3}\)EXPLANATION
Lithium is a group 1 element with an atomic number of 3
\(\text{ }_3\text{Li }\rightarrow\text{ 1s}^2\text{ 2s}^1\)At the neutral state, the number of electrons of an atom is equal to the number of protons of an atom.
Since the atomic number is 3, therefore, the number of protons will be 3
recall, the number of protons is equal to the number of electrons
Hence, the number of electrons is 3
\(\text{ N}_p\text{ = N}_e\text{ = 3}\)how does the position of an electron relates to its energy
Answers
The position and energy of an electron are intricately linked in the quantum realm.
The position of an electron is related to its energy through the principles of quantum mechanics. According to the Bohr model, electrons occupy specific energy levels or orbitals around the nucleus of an atom. These energy levels are quantized, meaning they can only have specific values. Electrons with lower energy are found closer to the nucleus in lower energy levels, while those with higher energy occupy outer energy levels. The energy of an electron is directly proportional to its distance from the nucleus. As the electron transitions between energy levels, it either absorbs or emits energy in discrete quantities known as photons. The energy of an electron can also be influenced by external factors such as electric and magnetic fields.
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the one at the bottom^
Answers
Answer:
change in gravitational potential energy is 50J
How does the neutron number in each compare
Answers
Answer:
Neutrons are all identical to each other, just as protons are. Atoms of a particular element must have the same number of protons but can have different numbers of neutrons.
Explanation:
Since the vast majority of an atom's mass is found its protons and neutrons, subtracting the number of protons (i.e. the atomic number) from the atomic mass will give you the calculated number of neutrons in the atom. In our example, this is: 14 (atomic mass) – 6 (number of protons) = 8 (number of neutrons).
Radiation that has mass and can cause atoms and molecules to become charged would be classified as:IonizingNon-ionizingElectromagneticParticulate
Answers
Remember that ions contain charges, those charges could be positive or negative. So, the process of becoming atoms and molecules a charged would be ionizing radiation, because the concept of ionizing radiation is radiation with enough energy to remove tightly bound electrons from the orbit of an atom, causing that atom to become charged or ionized.
We have another type of radiation that can cause this too and it is particulate radiation because particulate radiation consists of ionizing radiation which contains alpha, beta, neutrons, and positrons particles and those particles have charges.
Which of Earth’s spheres do humans impact and how?
You will get a free foot if you answer this
Answers
Answer:
humans have a huge impact on all spheres. if you negatively impact the spheres, such as burning fossil fuels, it'll pollute the atmosphere.
Explanation:
All four spheres of Earth are susceptible to human influence. Burning fossil fuels can cause pollution to be released into the atmosphere. Garbage accumulated by humans in landfills has an impact on the geosphere. Human waste enters waterways and has an effect on the hydrosphere.
What is geosphere ?Different definitions of the geosphere have conflicting uses. It can be used to refer to the atmosphere, lithosphere, hydrosphere, and cryosphere as a whole. Different mass and/or energy flows can be exchanged between the various geosphere collectives.
Land erosion and soil movement currently result from human activity more frequently than from any natural mechanism. Human-caused air and water pollution has a negative impact on the environment, rivers, and lakes, harming both other animals and people's health.
According to some scientists, humans have their own sphere, the "anthrosphere." But for the purposes of this module, people will also be considered a component of the biosphere.
Thus, Garbage accumulated by humans in landfills has an impact on the geosphere.
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discuss four factors of learning
Answers
Answer:
plz mark as BRAINLIEST plz...
Explanation:
●Intellectual factor: The term refers to the individual mental level. ...
●Learning factors: ...
●Physical factors: ...
●Mental factors: ...
What is the correct name for N204?
A. Dinitrogen tetroxide
O B. Nitrogen oxide
O C. Dinitrogen trioxide
O D. Nitrogen tetroxide
Answers
The blank
and
blank
of atoms are the same on both sides of
a chemical equation.
Please just answer the question directly instead of giving me some weird cryptic answer that I can’t use. I’ve seen this exact question answered before and nobody would give a straight answer.
