what three tests must all theories pass to be considered a "proven" theory?
In order to become a scientific theory the three categories that it must pass are the following:
1) Can the phenomena be recreated in a laboratory setting?
2) Can variables be changed, yet still result in like observations?
3) Is the phenomena truly natural or was it the result of a man-made force
enacting upon it?
The molar mass of the metal oxide M2O is 231.74 g/mol. What is the molar mass of the chloride of this metal?
The amount of energy in the bonds of the reactants plus any energy absorbed equals the amount of energy in the bonds of the products plus any energy _____.
A mouse runs across a 4.56 m kitchen floor in 3.42 seconds . What is the velocity of the mouse
What does a fossil of an ancient shark in Kansas indicate
The correct answer is:
That the land where it specifically was has been moving and that years ago that place was under water.
Explanation:
Kansas has been the cause of some of the most luxurious fossil findings in US history. The fossil record of Kansas spans from the Cambrian to the Pleistocene. From the Cambrian to the Devonian, Kansas was coated by a shallow sea.
Describe the two eukaryotic animal cell organelles that have roles similar to the organs of the human digestive system.
please write it like a 7th grader would since im in 7th dont use extreme words basically and 3 sentences is fine..NEED THE ANSWER ASAP!
What is an advantage of a multicellular organism?
A.Specialized cells perform specific functions.
B.Smaller cells operate more efficiently
C.Different types of cells do not need to communicate.
D.The cells are simpler. .
an aqueous solution contains 1.2mM of total ions. if the solution is NaCl (aq), what is the concentration of chloride ions?
Explanation:
As the total concentration is given as 1.2 mM. And, it is also given that salt present in the solution is NaCl.
As sodium chloride is an ionic compound so, when it is added to water then it will dissociate into sodium and chlorine ions as follows.
[tex]NaCl \rightarrow Na^{+} + Cl^{-}[/tex]
So, it means in total there will be formation of 2 ions when one molecules of NaCl dissociates.
Therefore, concentration of chlorine ions will be calculated as follows.
Concentration of [tex]Cl^{-}[/tex] ions = [tex]\frac{1.2mM}{2}[/tex]
= 0.6 mM
Thus, we can conclude that the concentration of chloride ions is 0.6 mM.
In a 1.2 mM solution of NaCl, which fully dissociates into its constituent ions in solution, the concentration of chloride ions is also 1.2 mM.
Explanation:The concentration of chloride ions in a 1.2mM aqueous solution of NaCl can be determined by understanding that NaCl dissociates completely into its constituent ions in solution. For every molecule of NaCl, there is one sodium ion (Na+) and one chloride ion (Cl-).
Given that the total ion concentration in the solution is 1.2mM, and knowing that NaCl dissociates fully into Na+ and Cl-, we can infer that the concentration of each ion is also 1.2mM. Therefore, the concentration of chloride ions in the solution is 1.2 mM.
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The molar mass of aluminum oxide (Al2O3) is 102.0 g/mol. What is the correct way to write the inverted molar mass of aluminum oxide as a conversion factor?
Answer: 1 mol Al2O3/102.0 g Al2O3
What is the benefit of cooking food to break down dietary fiber?(culinary)
It enhances appearance.
It enhances taste.
It improves digestibility.
It increases nutrition.
It increases shelf life
Answer: Option (c) is the correct answer.
Explanation:
When dietary fiber is broken down then it divides into smaller pieces and therefore, it becomes easier for gastric acid and digestive enzymes in the stomach to digest the food.
Therefore, we can conclude that out of the given options the benefit of cooking food to break down dietary fiber is that it helps in improving digestibility.
do u think the ocean has valleys and mountains?explain
The empirical formula for a compound is CH2. If n is a whole number, which shows a correct relationship between the molecular formula and the empirical formula?
Answer : The correct relationship between the molecular formula and the empirical formula is, [tex]\text{molecular mass}=n\times \text{empirical mass}[/tex]
Explanation :
Empirical formula : It is the simplest form of the chemical formula which depicts the whole number of atoms of each element present in the compound.
Molecular formula : it is the chemical formula which depicts the actual number of atoms of each element present in the compound.
For determining the molecular formula, we need to determine the valency which is multiplied by each element to get the molecular formula.
The equation used to calculate the valency is :
[tex]n=\frac{\text{molecular mass}}{\text{empirical mass}}[/tex]
As we are given that the empirical formula of a compound is [tex]CH_2[/tex].
[tex]\text{molecular mass}=n\times \text{empirical mass}[/tex]
Thus, the molecular formula will be, [tex](CH_2)_n[/tex]
Which ability do all organism have? A. quick escape from predators B. changing shape to blend into their surroundings C. consuming other organisms D. reproduction
Lichens are an example of a(n)
compare and contrast melting 10 kg of ice freezing 1 kg of water. be sure to address temperature,heat flow, and thermal energy
which elements are likely to gain electrons
Elements of nonmetals are likely to gain electrons
Atoms of elements which are non metals tend to gain electrons easily, This is due to their strong Electron affinity( which is the energy involved when an atom gains additional electron).Electron affinity is said to increase across a period , Therefore, The Halogens gain electrons the easiest making achieve the octet state the easiest.When these elements gain electrons, thy become negatively charged and are now terms Anions.See more here: https://brainly.in/question/25700153
How many Dalmatian puppies are in Pongo and Perdita’s litter?
find the molar mass of oxygen gas
Final answer:
The molar mass of oxygen gas (O₂) is found by multiplying the atomic mass of one oxygen atom (16.00 g/mol) by two, because oxygen is diatomic, yielding a molar mass of 32.00 g/mol.
Explanation:
To find the molar mass of oxygen gas (O₂), we need to consider that molecular oxygen is diatomic, meaning each molecule is composed of two oxygen atoms. The atomic mass of a single oxygen atom is approximately 16.00 g/mol. Therefore, the molar mass of oxygen gas is:
(2 atoms/molecule) × (16.00 g/mol/atom) = 32.00 g/mol
This calculation indicates that one mole of oxygen gas, which is 6.022 × 10²³ molecules, has a mass of 32.00 grams.
what type of bonding is represented in figure 2-2?
Answer:
Type of bonding is represented in the figure is Ionic bonding.
Explanation:
[tex]Na^++Cl^-\rightarrow NaCl[/tex]
Type of bonding shown in the given figure is an Ionic bonding.
Ionic bonding is defined as bonding in which complete transfer of electrons takes place. Atom which looses electrons is known as electropositive atom and an atom which gains electrons is known as electronegative atom.
Sodium is the 11th element of the periodic table:
[tex][Na]=1s^22s^22p^63s^1[/tex]
Chlorine is the 17th element of the periodic table:
[tex][Cl]=1s^22s^22p^63s^23p5[/tex]
Sodium atom will donate an electron to gain noble gas configuration and chlorine atom needs an electron to gain noble gas configuration.
Which section of earth is composed primarily of liquid metal
Outer core earth is composed primarily of liquid metal. The surface layer of the Earth is made up of numerous moving slowly tectonic plates.
What is earth?The third planet orbiting the Sun, Earth is home to all living species in the cosmos. While there is a lot of water everywhere across the Solar System, just Earth has liquid surface water. The ocean covers approximately 70.8% of the Earth's surface, dwarfing arctic ice, lakes, as well as rivers.
The remaining 29.2% of the Earth's surface is made up of land, which includes continents and islands. The surface layer of the Earth is made up of numerous moving slowly tectonic plates that interact to build mountain ranges, volcanoes, but instead earthquakes. Outer core earth is composed primarily of liquid metal.
Therefore, outer core earth is composed primarily of liquid metal.
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What is the approximate rate of plate movement
The approximate rate of plate movement is different in different regions. It is reported that the annual rate of tectonic plate movement in Atlantic region is about 0.8 cm/yr and that in pacific region is about 4cm/yr.
What is tectonic plates.The layers of earth crust and is called as tectonic plates. This tectonic plates creates the earths lithosphere. Tectonic plates are irregularly placed slabs undergoing some movements.
Lithospheric movement or tectonic movements is caused by the convection current in hot mantle in the earth crust. This current moves the fluid and thereby results in the slight movements of plates.
Thus, the rate of movement of tectonic plate depends on the regional characteristics and ocean crust. The scientific reports says that it is near 0.8 cm per yr in north Atlantic regions and 4cm/ yr in pacific area.
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The main difference between the Bohr model of the atom and the wave-mechanical model of the atom lies in the level of certainty of where the electrons are located.
The main difference between the Bohr model of the atom and the wave-mechanical model of the atom lies in the level of certainty of where the electrons are located is true
Why do nuclear power plant's use fission in stead of fusion
Answer: You may remember that an element can exist in different forms, called isotopes. These differ only in the number of neutrons of their nuclei.
Explanation: The nuclei of some isotopes break apart naturally to form new elements, releasing energy. This is called nuclear decay. When neutrons are absorbed by nuclei and then cause nuclei to break apart, the reaction is called nuclear fission. Nuclear fission happens every day in nuclear power plants. It supplies the heat necessary to make the steam used to generate electricity.
if an atom has 17 electrons in its mass is 35, calculate the following: Number of protons atomic number and number of neutrons
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What describes using organisms that were only alive during a specific time period to estimate the unknown age of items?
Radioactive dating
Law of superposition
Relative dating
Index fossils
Which of the following is true of science? It does not change once a law is discovered. It reflects the personal opinions and beliefs of scientists. It is a body of knowledge gained using inquiry and experimentation. It can be disproven by philosophy or religion.
a student notices dark clouds in the sky and that the playground is wet the student reasons that it rained which scientific skill describes the students reasoning
A. classifying
B. observing
C. inferring
D. predicting
Answer:
the answer is B. observing
Suppose the mass of a dog is 90 pounds. If 1 kilogram is equal to 2.2 pounds, what is the mass of the dog in kilograms?
how many protons are in an element with an atomic number of 8 and a mass of 18?
A:3
B:8
C:10
D:18
What determines whether an object will scatter light or reflect light?
Final answer:
Whether an object scatters or reflects light depends on the object's surface properties and light's wavelength. Smooth, shiny surfaces lead to specular reflection, while rough surfaces or small particles cause light to scatter, as in Rayleigh scattering, which gives the sky its blue color.
Explanation:
The distinction between whether an object will scatter light or reflect light depends on the object's properties and the wavelength of light. Specular reflection, following the law that the angle of reflection is equal to the angle of incidence, usually occurs on smooth and shiny surfaces, like a mirror. On the other hand, diffuse reflection or scattering occurs when light encounters rough surfaces or particles much smaller than the light's wavelength, which is the principle behind Rayleigh scattering. Rayleigh scattering, inversely related to the fourth power of the light's wavelength, explains why blue light is scattered more in the atmosphere, making the sky look blue, and why the sun appears yellowish from Earth.