Answer:
The seafloor
Explanation:
the bottom of the ocean, aka the sea floor.
usually made from sand
Answer:
H2O
Explanation:
Which of the following is not a possible sublevel?
1p
2s
3d
4f
Answer is: 1p.
First energy level only have one sublevel 1s.
Second energy level has 2s and 2p, third has 3s, 3p and 3d and fourth has 4s, 4p, 4s and 4f.
Aufbau principle is a scheme used to reproduce the electron configurations of the ground states of atoms by successively filling subshells (orbitals) with electrons in a specific order.
Filling subshells in the following order: 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p, 7s, 5f.
The following which is not a possible sublevel is 1p. Thus option 1 is correct.
What is electronic configuration?
Electronic configuration is defined as a symbolic representation of the manner in which the electrons of its atoms are distributed over different atomic nuclei.
It can also be defined as distribution of electrons around the nucleus.
The general electronic configuration is
1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p.....
Sublevel is defined as a level that is lower than or subordinate to another level.
Thus, the following which is not a possible sublevel is 1p. Thus option 1 is correct.
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Sarah has four samples of substance sample a 10 mL of olive oil sample b 10 mL of water sample c 20 mL of water sample d 20mL of milk which of the following samples have the same boiling point ?
Sample b 10 mL of water and sample c 20 mL of water have the same boiling point ,therefore option (b) and option (c) are correct .
What do you mean by the boiling point of water ?The boiling point is defined as the temperature at which a liquid’s saturated vapor pressure equals the atmospheric pressure surrounding it.
The boiling point of water is the temperature at which the liquid water vapor pressure is equal to the pressure surrounding the body, and the body transforms into a vapor.
The boiling point is the temperature for a particular liquid to boil at.
For example, the boiling point for water, at a pressure of 1 a t m, is 100 degrees Celsius.
Sample b 10 mL of water and sample c 20 mL of water have the same boiling point ,hence option (b) and option (c) are correct .
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HELP EM PLEASE
Which of the following is the energy stored in an object as a result of its vertical position or height?
Elastic potential energy
Gravitational potential energy
Kinetic energy
Thermal energy
Thermal energy hopefully I can help you next time
Answer:
Thermal energy i think
Explanation:
Which of these is a mixture carbon, carbon dioxide, air, and oxygen
Air is not a compound because oxygen and nitrogen stay seperately in air instead of reacting nitric oxide which is toxic. Same thing apply to other gases. Of course there are also few compound inside the air. However, air you breathe in generally is mixture made up of different non reacting gases and gas compounds.
mark brainliest plssss
Answer: Air is a mixture
Explanation:
Mixture is a substance which has two or more components which do not combine chemically and do not have any fixed ratio in which they are present. Example: Air
Element is a pure substance which is composed of atoms of similar elements.It can not be decomposed into simpler constituents using chemical reactions.Example: Carbon [tex](C)[/tex] , Oxygen [tex](O)[/tex]
Compound is a pure substance which is made from atoms of different elements combined together in a fixed ratio by mass.It can be decomposed into simpler constituents using chemical reactions. Example: water [tex]CO_2[/tex]
Thus Air is a mixture as it is composed of various gases which are not chemically bonded.
Which theory did Pasteur disprove by using boiled beef broth and a flask with S-shaped tubing?
Answer:
Theory of spontaneous generation.
Explanation:
Spontaneous generation refers to an outdated body of thought on the ordinary formation of living organisms without descent from similar organisms. The theory of spontaneous generation held that living creatures could arise from nonliving matter and that such processes were common in place and regular
The Hawaiian Islands are home to many endangered species. Why do you think the Hawaii Department of Agriculture is so strict about allowing nonnative species onto the islands?
It is so strict because a foreign species could compete with a native species and drive it to extinction.
Th volume of helium in a blimp is 6.28x10^9 millimeters. Thr density of helium is a blimp is 0.1786 meters. Find the massof the helijm blimp
The correct density of helium should be in [tex]\( \text{kg/m}^3 \)[/tex]. The calculated mass of helium in the blimp is approximately 1,121.908 kg.
The question asks us to find the mass of the helium in a blimp. To do this, we need to use the density of helium and the volume of the blimp.
However, the density provided in the question is not correctly stated because density should be mass per volume, usually given in grams per liter [tex](\( \text{g/L} \))[/tex] or kilograms per cubic meter [tex](\( \text{kg/m}^3 \))[/tex].
Assuming that the correct density of helium is 0.1786 [tex]\( \text{kg/m}^3 \)[/tex] (as would be common for a question of this nature), and the volume of the helium is given as [tex]\( 6.28 \times 10^9 \)[/tex] milliliters, we first need to convert the volume from milliliters to cubic meters to match the units of the density [tex](since \( 1 \) mL = \( 1 \times 10^{-6} \) \( \text{m}^3 \))[/tex].
First, convert the volume:
[tex]\( \text{Volume in cubic meters (m}^3\text{)} = 6.28 \times 10^9 \) mL \( \times 1 \times 10^{-6} \) \( \text{m}^3/\text{mL} \)\\ \( = 6.28 \times 10^3 \) \( \text{m}^3 \)[/tex]
Then calculate the mass: [tex]\( \text{Mass} = \text{Density} \times \text{Volume} = 0.1786 \) \( \text{kg/m}^3 \) \( \times 6.28 \times 10^3 \) \( \text{m}^3 \)[/tex]
[tex]\( \text{Mass of helium} = 1,121.908 \) kg[/tex]
The mass of helium in the blimp is approximately 1,121.908 kilograms.
The quantity 44 liters expressed in cubic meters is ____.
A. 0.000 044 m3
B. 440 000 m3
C. 0.44 m3
D. 0.044 m3
Answer:
D. 0.044 m3
Explanation:
A compound has an empirical formula of CH2 and a molar mass of 70.15. What is its molecular formula?
Locate the element zinc (Zn) on the periodic table. How many protons does an atom of zinc contain? How many electrons does an atom of zinc contain? How many neutrons does an atom of zinc contain? Give your answer to the nearest whole number.
Location the element zinc (Zn) on the periodic table:
Group number : 12 Period number : 4 Block : d block Element : Transition elements.Part 2:Protons in an atom of Zn: 30
Part 3:Electrons in a Zn atom: 30
Part 4 :Neutron in an atom of Zn: 35
Answer: Number of protons and electrons in Zinc are 30 and number of neutrons in zinc are 35.
Explanation:
Zinc is the 30th element of the periodic table having mass number of 65.
Atomic number is defined as the number of protons or number of electrons present in an element. It is represented as Z.Atomic number = Number of protons = Number of electrons
For Zinc:
Z = 30
So, Number of protons = Number of electrons = 30
Mass number is defined as the sum of number of protons and number of neutrons. It is represented as A.Mass number = Number of neutrons + Number of protons
A = 65
So, Number of neutrons = 65 - 30 = 35
Hence, number of protons and electrons in Zinc are 30 and number of neutrons in zinc are 35.
What is Mendeleev most known for?
What is "change" when we are talking about natural and physical systems?
A.
Information that has been proven to be true
B.
Repeated processes that are used in a variety of ways
C.
A process for using knowledge and skills to acquire new knowledge
D.
A variable or alteration to one part that affects an entire system
D: is the anwser that your looking for
Answer:
A variable or alteration to one part that affects an entire system
Explanation:
Change in literal sense means the occurrence of some alteration or difference in a given object/situation/person etc.When we talk about physical and natural systems, then one can say that if a system shifts from one state to another then it has changed. The shift in the state means an alteration in its physical or chemical properties that occur in such a way that it causes a difference between the original state of the system to the final state. For example, if in a human body which is a natural system if the blood pressure drops then we can say that there is a change that took place.What is the final temperature of a 27.2-gram wooden block that starts at 23.4°C and loses 759 joules of energy? The specific heat capacity of wood is 1.716 joules/gram degree Celsius. Use the formula Q = mCΔT.
A. 7.1°C
B. 10.9°C
C. 16.3°C
D. 39.7°C
T = final temperature of the block
T₀ = initial temperature of the block = 23.4 °C
Q = energy lost from the wooden block = - 759 J
c = specific heat capacity of wood = 1.716 J/(g °C)
m = mass of the wooden block = 27.2 g
Heat lost from the block is given as
Q = m c (T - T₀)
inserting the values
- 759 = (27.2) (1.716) (T - 23.4)
T = 7.1 °C
The final temperature of a 27.2-gram wooden block is 7.1 °C. The correct option is A.
What is temperature?Temperature is the measurement of the hotness or coldness of the body. It is denoted by Kelvin.
By specific heat equation
[tex]Q = mc (T - T_\circ)[/tex]
where T = final temperature
T₀ is the initial temperature =23.4 °C
Q is lost energy from the block = - 759 J
c is specific heat = 1.716 joules/gram
m is the mass of the block = 27.2 g
Putting the values in the equation
[tex]\rm - 759 = (27.2) (1.716) (T - 23.4) = 7.1_\circ C[/tex]
Thus, the correct option is A is 7.1 °C.
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A potassium ion can combine with several monatomic and polyatomic ions to form compounds.
An example of a potassium compound containing both ionic and covalent bonds is (potassium chloride, potassium hydride, potassium nitrate, potassium oxide), and an example containing only ionic bonds is (potassium chloride, potassium hypochlorite, potassium sulfate, potassium sulfite).
For the first one, you have to find one that has both a metal and a nonmetal in it, plus potassium. Bonds between nonmetals are called covalent because they share electrons and a bond between a metal and a nonmetal is an ionic bond because they exchange electrons.
Potassium chloride is KCl. Only an ionic bond.
Potassium hydride is KH. Only an ionic bond.
Potassium nitrate is KNO3. There we go, that has a covalent bond between the nitrogen and oxygen, and an ionic bond between potassium and the nitrogen and oxygen.
For the second one, potassium chloride is the answer because the other three also have covalent bonds. Chloride is the only one that isn't a compound.
Answer:
Potassium Nitrate, Potassium Chloride
Explanation:
upon heating a copper sample will expand, leading to a lower density?
A) True
B) False
Answer;
The above statement is true
upon heating a copper sample will expand, leading to a lower density
Explanation;
-The density of solids decreased with increase in temperature and vice versa. The increase in temperature causes the volume of the solid to increase which as a result decreases the density as Density=Mass/Volume. The temperature of a body is the average kinetic energy of the molecules present in it.
In other words; The temperature of a body is the average kinetic energy of the molecules present in it. Therefore; when heat is supplied ( or temperature is increased) the average kinetic energy increases which increases the volume and thus density decreases.
What Is A Nebula?
A) cloud of asteroids
B) group of stars
C) cloud of dust and gas in space
D) groups of planets orbiting a star
The answer to your question is,
C. Cloud of dust and gas in space.
-Mabel <3
a nebula is a cloud of gas and dust in outer space, visible in the night sky either as an indistinct bright patch or as a dark silhouette against other luminous matter.
therfore your answer would be C cloud of dust and gas in space
question answered by
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please help!
Typically _________ cannot be removed from the atom.
A) electrons
B) neutrons
C) protons
D) tachyons
The correct answer is option (C). Typically protons cannot be removed from the atom.
Protons, along with neutrons, are the subatomic particles that make up the nucleus of an atom. They are held together by the strong nuclear force, which is one of the four fundamental forces of nature. This force is so strong that it overcomes the electromagnetic repulsion between the positively charged protons. As a result, protons cannot be easily removed from the atom through typical chemical reactions or processes.
Electrons, on the other hand, are much less massive and are bound to the atom by the electromagnetic force, which is weaker than the strong nuclear force. Electrons can be removed or added to an atom during chemical reactions, a process that results in the formation of ions.
Neutrons are neutral particles found in the nucleus along with protons. While they are not electrically charged like protons, they still contribute to the mass of an atom and play a role in nuclear reactions. Similar to protons, neutrons are also held in the nucleus by the strong nuclear force and cannot be removed through chemical means.
Tachyons are hypothetical particles that are said to move faster than the speed of light. They are not part of the known structure of atoms and are not considered in the context of typical atomic or chemical processes.
How long does it take a 180 G sample of AU-198 to decay to 1/8 it’s original mass
Answer:
8.10 days
Explanation:
The half-life of gold-198 (2.70 days) is the time it takes for half the gold to decay.
After one half-life, half (50 %) of the original amount will remain.
After a second half-life, half of that amount (25 %) will remain, and so on.
We can construct a table:
No. of half-lives Fraction remaining
1 [tex]\frac{1}{2}[/tex]
2 [tex]\frac{1}{4}[/tex]
3 [tex]\frac{1}{8}[/tex]
Thus, the gold will decay to ⅛ of its original mass after three half-lives.
∴ Time required = 3 × 2.70 days = 8.10 days
The exact time it would take for a 180 G sample of AU-198 to decay to 1/8 of its original mass depends on the half-life of AU-198, which isn't provided here. However, theoretically, it would take three half-lives for a substance to decay to 1/8 of its original mass.
Explanation:The question is asking for the time it will take for a 180 G sample of AU-198 to decay to 1/8 it's original mass. AU-198 represents gold-198, which is a radioactive isotope of gold.
In radioactive decay problems, the time it takes for a substance to decay is dependent on the half-life of the substance. Without the specific half-life of AU-198 provided, we can only describe the general formula for calculating decay time.
The half-life of a radioactive isotope is the time it takes for half of the atoms in a sample to decay. This process is exponential, meaning after each half-life, half of the remaining atoms will decay.
To decay to 1/8 of the original mass, the substance has to go through 3 half-lives (since 1/2^3 = 1/8). So, the total time it would take for a sample to decay to 1/8 of its original mass would be 3 times the half-life of this isotope.
Once you obtain the half-life value of AU-198, simply multiply it by 3 to get the answer. Remember that the unit of your answer should be in the same unit as the half-life is given.
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what is the excess reactant in the combustion of 23 g of methane in the open atmosphere?
Answer : The excess reactant in the combustion of methane in opem atmosphere is [tex]O_{2}[/tex] molecule.
Solution : Given,
Mass of methane = 23 g
Molar mass of methane = 16.04 g/mole
The Net balanced chemical reaction for combustion of methane is,
[tex]CH_4(g)+2O_2(g)\rightarrow CO_2(g)+2H_2O(g)[/tex]
First we have to calculate the moles of methane.
[tex]\text{ Moles of methane}=\frac{\text{ Given mass of methane}}{\text{ Molar mass of methane}}[/tex] = [tex]\frac{23g}{16.04g/mole}[/tex] = 1.434 moles
From the above chemical reaction, we conclude that
1 mole of methane react with the 2 moles of oxygen
and 1.434 moles of methane react to give [tex]\frac{2moles\times 1.434moles}{1moles}[/tex] moles of oxygen
The Moles of oxygen = 2.868 moles
Now we conclude that the moles of oxygen are more than the moles of methane.
Therefore, the excess reactant in the combustion of methane in open atmosphere is [tex]O_{2}[/tex] molecule.
You probably already know the names of some molecules. Identify which compound (water, salt, carbon dioxide, or methane) corresponds to each of the following chemical formulas. H2O is . CO2 is . NaCl is . CH4 is .
Explanation:
Water has a formula which represents two hydrogen atoms are attached to one oxygen atom. Therefore, the formula of water is [tex]H_{2}O[/tex].
Salt is also known as sodium chloride. Its formula represents that one sodium atom is attached to one chlorine atom, therefore, its formula is NaCl.
Carbon dioxide has a formula which represents one carbon atom is attached to two oxygen atoms. Therefore, its formula is [tex]CO_{2}[/tex].
Methane has a formula which represents one carbon atom is attached to four hydrogen atoms. Therefore, its formula is [tex]CH_{4}[/tex].
Thus, we can conclude that [tex]H_{2}O[/tex] is water, [tex]CO_{2}[/tex] is carbon dioxide, NaCl is salt, and [tex]CH_{4}[/tex] is methane.
The various compounds along with their corresponding formula would be as follows:
Water - [tex]H_2O[/tex]Salt - NaClCarbon dioxide - [tex]CO_2[/tex]Methane - [tex]CH_4[/tex].Water is made up of two atoms of hydrogen and an atom of oxygen bonded together as H2O.
Common salt consists of an atom each of sodium and chlorine bonded together as NaCl.
Carbon dioxide consists of an atom of carbon and two atoms of oxygen bonded together as CO2.
Methane consists of an atom of carbon and four atoms of hydrogen bonded together as CH4.
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Density of ZrC is 6.73g/cm. A cylinder of this material has a mass of 56.3 and a length of 12.0. What is the diameter of this object?
Match the element with its number of valence electrons. Match Term Definition: Helium Aluminum Fluorine Sodium A) 1 B) 2 C) 3 D) 7
Helium- 2
Aluminum- 3
Fluorine- 7
Sodium- 1
Hope I helped.
The correct match of each element with its valence electron is as follows:
Helium: 2 (option B). Aluminum: 3 (option C).Fluorine: 7 (option D).Sodium: 1 (option A). What is valence electron?Valence electron is any of the electrons in the outermost shell of an atom capable of forming bonds with other atoms.
The number of valence electrons possessed by the atoms of an element determines the chemical reactivity of such element and it's groups on the periodic table.
According to this question, the appropriate valence electron has been assigned to each element based on their group on the periodic table.
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Which statements accurately describe stars? Check all that apply.All stars are smaller than the Sun.
Stars are flat circles.
Stars are made of gas.
Star color is related to temperature.
Star brightness depends on shape. need help asap
Answer:
Stars are made of gas.
Star color is related to temperature.
Explanation:
Stars are big ball of gases mainly hydrogen and helium. Stars can be bigger than sun or smaller. They appear as flat circles but are spheres. The brightness of star depends on their size and distance but not on their shape. Color of star is related to temperature. A blue color star is hotter than a yellow star. A red star is a cool star.
Stars are made of gas.Star color is related to temperature.
Stars can have bigger size or small than sun Stars are normally appear as flat circles and not sphere
The brightness does not depends on their shape, it depends on the distance they are as well as their size There is a relationship between the color of star and the temperature. A yellow star is less hotter compare with blue star whereas red star is very cool star.Stars are made up of big ball of gases , these gases are mainly hydrogen and helium, the hydrogen gas are as a result of nuclear fusion.Therefore, the statement that gave accurate description about star are the second and third statement
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What is the scientific term for rocks made in lava?
The answer is d. extrusive.
The other term for it is igneous rock. Igneous rock is made in lava, and another term for igneous rock is extrusive rock.
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Answer:
The answer is Extrusive.
Explanation:
How I know is because I took the test and I got 100% this was one of the questions.
Which statement accurately describes homeostasis?
A.Homeostasis is a factor in the environment that creates a response.
B.Homeostasis is the number of cells in an organism, such as a unicellular or multicellular organism.
C.Homeostasis is a place that can provide shelter to different organisms.
D.Homeostasis is the maintenance of a stable internal environment despite changing external conditions.
Answer:
Homeostasis is the maintenance of a stable internal environment despite changing external conditions.
Explanation:
In other words the answer is D. (:
Homeostasis is the maintenance of a stable internal environment despite changing external conditions. Thus option D is correct.
what is homeostasis ?Homeostasis is the natural process of cell response to its environment to remain as the steady state between internal conditions and outer environment.
In this process cell maintains temperature, fluid, sugar balance through it For Example when the outside climate is cold we start shivering and get energy from ATP to regulate our body temperature.
The primary components of homeostasis are stimulus from a change in the environment, the receptor which react to the change by informing the control unit.
The control unit which communicates the change in the body, The effector receives the information and acts on the change.
Thus option D is correct.
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Na2O2 + CO2 → Na2CO3 + O2
What volume of O2 gas is produced from 2.80 liters of CO2 at STP?
The volume of O2 gas that is produced from 2.80 L of CO2 at STP is 1.40 L
calculationwrite a balanced chemical equation
2Na2O2 + 2CO2 → 2Na2CO3 +O2
by use of mole ratio between CO2:O2 which is 2:1 the number of liters of O2 produced is therefore= 2.8 x 1/2 =1.40 Liters
Answer: The volume of [tex]O_2[/tex] produced will be 1.4 liters.
Explanation:
AT STP, the conditions are:
1 mole of a gas occupies 22.4 liters of volume.
The balanced chemical equation for the reaction follows:
[tex]2Na_2O_2+2CO_2\rightarrow 2Na_2CO_3+O_2[/tex]
By Stoichiometry of the reaction:
2 moles of carbon dioxide produces 1 mole of oxygen gas, which means that
44.8 liters of carbon dioxide gas produces 22.4 liters of oxygen gas.
So, 2.8 liters of carbon dioxide gas will produce = [tex]\frac{22.4}{44.8}\times 2.8=1.4liters[/tex] of oxygen gas.
Hence, the volume of [tex]O_2[/tex] produced will be 1.4 liters.
Describe erosion in your own words
Answer:
the action of becoming destroyed and removed via air, rain, or even other natural phenomena
Explanation:
Which statements correctly describe water boiling in a pot? 1.Air bubbles from the atmosphere are being absorbed.2.The water’s internal kinetic energy is increasing.3 The water is gaining internal potential energy. 4.The water’s temperature is increasing. Individual water molecules are escaping.
Explanation:
Boiling point is defined as the temperature at which vapor pressure of liquid becomes equal to the atmospheric pressure.
When high temperature is provided to a liquid then forces of attraction between the molecules decreases and kinetic energy of its molecules increases. As a result, collision between the particles increases.
Also, it is known that kinetic energy is directly proportional to temperature. Therefore, when temperature increase kinetic energy also increases.
Hence, we can conclude that statements correctly describing water boiling in a pot are as follows.
The water’s internal kinetic energy is increasing. The water’s temperature is increasing. Individual water molecules are escaping.Answer:
The water’s internal kinetic energy is increasing.
The water’s temperature is increasing.
Individual water molecules are escaping.
(PLATO answer)
Which statement about fusion is correct? A. Fusion is currently being used to generate electricity in power plants. B. Fusion occurs in the sun. C. Fusion occurs when neutrons split atoms. D. Fusion produces dangerous radioactive waste
I think the answer is B
The correct answer is option B which is fusion occurs in the sun.
Explanation:Fusion in nuclear physics is an reaction in which two or more nuclei fuse to form another atom and due to mass conservation they also release energy.This reaction is common in sun and provides energy to sun.In sun two hydrogen atoms fuse to for a helium nuclei and giving some amount of energy.In sun there are 620 million metric tons of hydrogen fuse together each second.The only way an object's speed or direction of motion can be changed is if a(n) _______ force acts on it.
Unbalanced force acts on it