Answer:
2. The factor that is different in an experiment.
Explanation:
a variable is able to change because it is an element, feature, or factor that is liable to vary or change
2Mg + O2
2Mgo
what is the coefficient
Answer:
In this chemical equation, there are two main elements. Those elements are magnesium (Mg) and oxygen (O). Molecules are a group of atoms bonded together, and in this case, the oxygen molecules is O2, but not 2MgO because there are two different molecules in this compound. Coefficients are a number that multiply an entire molecule, and are also placed in front of it. In this case, O2 has no coefficient, but a subscript of 2. But, every molecule in this equation must have a coefficient and if add a coefficient of 1 to the oxygen molecule, it does nothing to the overall balancing of equations.
So, the answer: coefficient to the oxygen molecule is 2.
Have a great day/night, stay safe, and merry christmas!
What is the wavelength of electromagnetic radiation which has a frequency of 4.464 x 10^14 s-1
a. 1.338 x 10^23 m
b. 1.489 x 10^-6 m
c. 6.716 x 10^-7 nm
d. 671.6 nm
Answer:
d. 671.6 nm
Explanation:
It is possible to solve the wavelength of a radiation from its frequency -or vice versa- using:
λ = c / f
Where λ is wavelength,
c is speed of light, a constant (2.998x10⁸m/s)
And f is frequency: 4.464x10¹⁴s⁻¹
Replacing:
λ = 2.998x10⁸m/s / 4.464x10¹⁴s⁻¹
λ = 6.716x10⁻⁷m
As 1m = 1x10⁹nm:
6.716x10⁻⁷m * (1x10⁹nm / 1m) = 671.6nm
Right answer is:
d. 671.6 nm
The sun heats air masses in Earth's atmosphere causing
Answer:
convection
Explanation:
The heating of the Earth's surface and atmosphere by the sun drives convection within the atmosphere and ocean. This convection produces winds and ocean currents. The greater the pressure differences between a low-pressure area and a high-pressure area, the stronger the winds.
Find the number of moles of argon in 534 g
of Argon
Answer:
13.4 mol Ar
General Formulas and Concepts:
Chemistry - Atomic Structure
Reading a Periodic TableUsing Dimensional AnalysisExplanation:
Step 1: Define
534 g Ar
Step 2: Identify Conversions
Molar Mass of Ar - 39.95 g/mol
Step 3: Convert
[tex]534 \ g \ Ar(\frac{1 \ mol \ Ar}{39.95 \ g \ Ar} )[/tex] = 13.3667 mol Ar
Step 4: Check
We are given 3 sig figs. Follow sig fig rules and round.
13.3667 mol Ar ≈ 13.4 mol Ar
Answer:
The number of moles in 452 grams of Argon is 13.31 moles.
Explanation:
. Intermolecular forces can exist between:
a. Atoms
b. Molecules
c. lons
d. All of the above
Help
7. Rank these parts of the electromagnetic spectrum from lowest energy (1) to
highest (7):
Gamma
Infrared
Microwave
Radio
Visible
Ultraviolet
X-ray
Answer:
Gamma, Infrared,microwave,Radio, visible, ultraviolet,X-ray
Ranking these parts of electromagnetic spectrum from lowest energy to highest energy is as follows ;
Radio Microwaves, Infrared, Visible, Ultraviolet, X-ray Gamma waves.The longer the wavelength of a section of the EM spectrum the lower the energy carried while the shorter the wavelength and more the energy the electromagnetic wave will contain.
Hence ranking the electromagnetic waves in the electromagnetic spectrum from the lowest energy to the highest energy is ; Radio, Microwaves, Infrared, Visible, Ultraviolet, X-ray, Gamma waves.
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Maria walked on a beach made mostly of sand. She walked barefoot
on the beach early in the morning, and the sand was cool. When she
walked in the same area in the afternoon, the sand was hot.
Which statement best describes why the temperature of the sand
increased?
The statement that the atoms in the sand were moving more quickly best describes why the temperature of the sand is increased. The relationship between kinetic energy and temperature is explained here.
What is the relationship between kinetic energy and temperature?The temperature of a body is directly proportional to the kinetic energy. The energy acquired by those molecules which are in motion is called the kinetic energy.
The radiation of the sun falls on a number of objects on our surroundings. The objects absorb this energy till afternoon due to which they become hot.
When Maria walked in afternoon, the sand was hot as its particles have gained the kinetic energy due to which they move rapidly from one place to another. So that the sand feels more hot in the afternoon.
Thus the atoms in the sand were moving more quickly best describes the increase in temperature of the sand.
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How many moles are there in 97.9L He gas?
Answer:
I think there are like about 5.50
Explanation:
help fast please it's timed
Answer: B its most likely
I think it would be d if I am wrong im am sorry
How many grams are in 2.94 x 1017 atoms of Iron?
Answer:
8.677
⋅
10
8
g
Explanation:
How do you know when a saturated solution has been produced?
ANSWER AS SOON AS POSSIBLE PLEASE!!!! Which type of water represents the largest percentage of earths water?
Answer:
im pretty sure its groundwater just read this and see the answer
Explanation:
The ocean holds about 97 percent of the Earth's water; the remaining three percent is found in glaciers and ice, below the ground, in rivers and lakes. Of the world's total water supply of about 332 million cubic miles of water, about 97 percent is found in the ocean.
difference between fluids and nonfluids
Answer:
All liquids are fluids but not all fluids are liquids. Fluids basically describe anything that can flow as a result of a difference in pressure between two points. Liquids on the other hand are a subset of fluids. Liquids are the incompressible fluids. These are the fluids who's density does not change sharply with pressure.
Gases are also fluids, they form the compressible fluids. They do flow as a result of difference in pressure between two points but at the same time they can be compressed or expanded. Their density fluctuates with pressure.
Hence fluids consist of 2 mutually exclusive groups of compressible and incompressible fluids. Liquids are the incompressible fluids and hence form a subset of the more general term fluid.
Whoever answers correct I’ll give you Britney Brainly
the correct answer is thermal or light
Carbon dating is a process where scientists evaluate the percentage of Carbon-14 atoms that have decayed to
Carbon-12. The process of changing
from Carbon-14 to Carbon-12 involves the atoms losing two neutrons.
What type of reaction occurs when Carbon-14 changes to Carbon-12?
O Single Replacement
O Fusion
O Decomposision
O Fission
Answer: flood
Explanation:
The type of reaction that occurs when Carbon-14 changes to Carbon-12 is fission reaction. The correct option is D.
What is nuclear fission?Nuclear fission is the operation by which an atom's nucleus splits into two or several smaller nuclei.
Even by radioactive decay's energetic standards, the fission process frequently produces gamma photons and releases a large amount of energy.
Nuclear energy can be used to generate electricity, but it must be liberated from the atom first. Atoms are split to release energy during the nuclear fission process.
The decay of carbon-14 is another nuclear reaction that we can use. Carbon is a necessary element for living organisms that constantly exchange carbon, the majority of which is carbon-12.
However, some of those carbon atoms are carbon-14 isotopes.
Thus, the correct option is D.
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Which statement best describes the position of a coastal area during a low
tide?
A. It is on a side of Earth that is perpendicular to the Moon.
B. It is on the part of Earth that is experiencing nighttime.
C. It is on the part of Earth that is experiencing daylight.
D. It is on a side of Earth that faces the Moon directly.
Answer:
A is the correct answer
Explanation:
Moon pulls the ocean upwards causing tides
The position of a coastal area during a low tide is: it is on a side of Earth that is perpendicular to the Moon.
What happens during low tide?Whenever the absolute bottom, or the box, arrives at a coast, the coast encounters a low tide. Envision the sea is molded like a ball pointing at the moon. The football's sharp closures address the pieces of the Earth encountering elevated tide and the ball's level sides are the pieces of the earth encountering low tide.
Thus, option A is correct.
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can I please get help with it
Answer:
True
Explanation:
IT IS TRUE WIWJJWOWIWHW
PLEASE HELP WILL MARK BRAINLIEST!!!!!!
Magnesium is an alkaline earth metal. With which group of elements is magnesium most reactive?
alkali metals
halogens
noble gases
transition metals
Answer:
I think alkali metals will be the answer.
Why are metals good conductors of heat?
O A. The free-moving electrons transmit heat quickly.
B. The malleable atoms slide past each other, transmitting heat.
O c. The formation of alloys allows a path for heat to travel.
O D. The ductility allows heat to move along an edge quickly.
Answer: A. The free-moving electrons transmit heat quickly.
Explanation:
Answer:
the free-moving electrons transmit heat quickly.
Explanation:
i just took the test
which of the following elements has the lowest ionization energy?
a. Argon
b. Hydrogen
c. Beryllium
d. Hellium
Among the given options, the element that has the lowest ionization energy is beryllium. Thus, the correct option for this question is C.
What do you mean by Ionization energy?Ionization energy may be defined as the amount of energy that is significantly required in order to eliminate an electron from an isolated atom or molecule. It is the minimum energy required to remove the most loosely bound electron of an isolated gaseous atom, positive ion, or molecule.
The group of elements that have the lowest ionization energy is known as alkali metals or alkali earth metals. This is because of the shielding effect that the ionization energy decreases from top to bottom within a group. Beryllium is a member of group 2 which has the lowest ionization energy. While Fluorine is said to have the highest ionization energy.
Therefore, the element that has the lowest ionization energy is beryllium. Thus, the correct option for this question is C.
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3. What is found around the roots of some plants that turns nitrogen from the form we cannot use to the form we can use?
Answer:
Bacteria
Explanation:
Some plants, specifically leguminous plants form a symbiotic relationship with certain bacteria species called NITROGEN-FIXING BACTERIA in their root nodules. In this relationship, the bacteria species e.g nitrosomonas, nitrobacter etc help the plants fix atmospheric nitrogen (N2) or ammonium compounds, which are forms of nitrogen that are unusable to the plant into nitrates, a usable form.
Therefore, BACTERIA are the organisms found around the roots of these set of plants (legumes) that turns nitrogen from the form we cannot use to the form we can use.
how many grams are in 5.17 moles of Bismuth ASAP
In a laboratory demonstration, a balloon filled with methane and oxygen was exposed to a flame. The result was a brief, large flame. The students were asked to formulate an equation for the reaction. One answer is below. (3 points) Is this equation correct? Explain your reasoning.
Answer:
CH4(g) + 2O2(g) -------> CO2(g) + 2H2O(g)
Explanation:
Even though the question is incomplete because the equations are missing. However, one thing that is clear from the question is that the reaction is a combustion reaction.
A combustion reaction is a type of reaction that produces heat and light. The mixture of methane and oxygen yielded a brief, large flame which shows that combustion has taken place according to the equation shown above.
Good science depends on interactions ........
Question 3 options:
within the the government
within the a group of scientists who all agree
within the scientific community.
within those in 'authority' in the Science world.
11) Predict the products of this reaction.
CuSO4(aq) + 2KOH(aq) →
A) Cu(OH)2(aq) + K2SO4(s)
B) Cu(OH)2(s) + K2SO4(aq)
C) CuOH(s) + K2SO4(aq)
D) CuOH2(s) + K2SO4(aq)
Answer:
6FCRXCTV
Explanation:
ED5RF6GT7HY8JU9KI0LO-;PJH7YNG6GDAnswer:
b
Explanation:
a p e x
Which statement is true about endothermic and exothermic reactions
Answer:
The products have less potential energy than the reactants in an exothermic reaction.
Explanation:
took the test
Which of the following is an example of a decomposition reaction?
Help, and fast! I really need an answer to this.
Answer:
Explanation:says these bars are like co vid i get em right off teh bat
pleaseeeeeeeeee!!!!!!
Answer:
Unbalanced
Explanation:
There is going to be 4 Iron and 4 Oxygen as the end result if I am remembering how to do this correctly so there for 2Fe +O₂→ Fe₃O₄ is unbalanced
which is the fastest chemical reaction
Answer: dust or decay
Explanation:
