Raquel has collected $3. 80 in nickels and dimes. She has exactly 48 nickels. How many dimes does she have?.
Answer:
14 dimes
Explanation:
48 nickels = 48 x .05 = $2.40
$3.80 - $2.40 = $ 1.40
$1.40 / .10 = 14 dimes
what substance melts ice the fastest science project
Answer:
Heat, Salt
Explanation:
Raising the temperature of ice brings it from a solid state to a liquid. Unless you have a list of substances then it would probably be salt. Salt melts Ice by lowering the freezing point temperature.
If you have a list of substances it would be helpful to list them in your question.
Chemical Reactions - Problems
Molecule Bank
Cor
Incc
Drag molecules to
the scale to balance
the reaction
O Fe
+
0 02
- 0 Fe2O3
A
Submit your answer
Answer:
The balanced chemical equation is,
4 Fe + 3 O₂ → 2 Fe₂O₃
Drag four iron atoms and 3 oxygen molecules and place it on the left plate.
And drag 2 molecules of ferric oxide and place it on the right plate.
You are responsible for which of the following
(Select all that apply.)
Following the hazardous materials management process: Identify, Package, Label, and Ship.
Watching for unauthorized individuals who may try to gain access to hazardous materials.
Neither of these.
Answer:
Both A and B
Explanation:
With hazardous materials, it is usually a safe bet that all of the listed precautions are required, so to protect hazardous materials.
In the reaction Upper C plus upper O subscript 2 right arrow upper C upper O subscript 2. Which element is reduced in the reaction? C O2 CO2.
Answer:
O2 in edge
Explanation:
Which type of energy is stored within an object and is partially determined by the object’s position?
electrical energy
ionic energy
kinetic energy
potential energy
Answer:
D. Potential energy
Explanation:
Answer:
Which type of energy is stored within an object and is partially determined by the object’s position?
electrical energy
ionic energy
kinetic energy
potential energy
D. potential energy
If Maria winks exactly 5 times every minute while she is awake
and she sleeps exactly 8 hours a day, how many times does
Maria wink in a day?
winks/day.
Step by step explanation is given above.
When the process of condensation occurs, the kinetic energy of particles.
Condensation is the changing of a gas to a liquid. The vapor molecules give up so much kinetic energy that they can't stay in the gaseous phase. The molecules begin to stick together or condense. Kinetic energy lost by condensing gas molecules warms the surface they strike.
Which choices is a biotic factor of an ecosystem?
• sun
• ants
• air
• soil
Answer:
Aboitic factor would be soil
Biotic factor would be ants.
Explanation:
Which ecosystem--mountain, tundra, or taiga--do you think is most vulnerable to human activity? Provide reasoning for your choice.
The tundra ecosystem is most vulnerable to human activity.
What is a Tundra ecosystem?This ecosystem is characterized by plains which lacks trees,
very low temperature and poor nutrients. It is harsh and few
humans inhabit this region.
It is most vulnerable to humans as a result of the high oil
exploration, drilling of mineral resources and hunting that takes
place in the region.
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Which substance is composed of atoms that all have the same atomic number
A). Ethane
B). Ethene
C). Methane
D). Magnesium
Answer:
D. Magnesium
Explanation:
The substance is composed of atoms that all have the same atomic number C) Methane. Methane (CH₄) is composed of atoms that all have the same atomic number. In this case, all the atoms in methane are hydrogen atoms, each having an atomic number of 1.
Atoms are the basic building blocks of matter. They are the smallest units of an element that retain the chemical properties of that element. Atoms consist of three main subatomic particles.
The number of protons in an atom determines its atomic number and identifies the element. For example, an atom with 6 protons is carbon, and an atom with 8 protons is oxygen.
Atoms are electrically neutral overall because the number of protons is equal to the number of electrons. However, atoms can gain or lose electrons to form ions, which have a net positive or negative charge.
Ethane (C₂H₆) and ethene (C₂H₄) contain both carbon and hydrogen atoms, while magnesium (Mg) is an element itself and consists of atoms with atomic number 12. Therefore, the substance is composed of atoms that all have the same atomic number C) Methane.
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True or false. It is safe to heat flammable liquids with a hot plate as long as it’s done in a fume hood.
Answer:
The answer is false
It is safe to heat flammable liquids with a hot plate as long as it’s done in a fume hood. The above statement is false.
What is flammable liquids?A flammable liquid is one with a flash point at or below the nominal threshold temperatures specified by a variety of national and worldwide standards organizations. This means that it can easily ignite in air at room temperature.
Acetone, biodiesel, diesel, ethanol, and gasoline are just a few examples of flammable liquids. Strict storage regulations must be followed since the fumes of these substances rapidly catch fire and burn. These liquids are even further divided into groups based on their flash points or boiling points, and it is from these groups that safe handling and storage procedures are determined. It is not safe to heat flammable liquids with a hot plate as long as it’s done in a fume hood.
Therefore, the given statement is false.
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Ocieanic
or continental crust thicker
Answer:
Continental
Explanation:
Hope This Helps
Which of the following is true about the following lever?
80 N
40 N
9 m
3 m
It will rotate clockwise.
It will rotate counter-clockwise.
It is balanced and will not rotate.
Answer:
It will rotate counter-clockwise
Explanation:
Momentum is greater on the left side.
12. How many seconds are in 90 years? Show all work.
Answer:
The answer would be 2,838,240,000
Explanation: In 1 year there are 31,536,000 and if you multiply that number by 90 you would get 2,838,240,000
Answer:
2838240000
Explanation:
1 calendar year =
31536000
X 90
=
2838240000
Which is an example of variations in a population of organisms
Answer:
The gravitational potential energy it had from being above the ground is converted to kinetic energy as the rock falls. As kinetic energy increases, the velocity of the rock will also increase. However, if one considers the air, the rock will lose energy as it falls due to air resistance. If the cliff is high enough, the acceleration due to gravity and the air resistance due to the velocity will be exactly equal and there will be no change in kinetic energy.
Explanation:
hope this helps
6. For each of the following sets of atoms, rank the atoms from smallest to largest atomic radius.
a. Li, CF
b. Li, Na, K
c. Ge, P, O
d. C, N, AI
e. AI, CI, Ga
Answer:
a (F < C < Li)
b (Li < Na < K)
c (Ge < P < O)
d (C < N < Al)
e (Ga < Cl < Al)
A paragraph on information about density.
Answer:
Density is a measure of mass per unit of volume. ... The average density of an object equals its total mass divided by its total volume. An object made from a comparatively dense material (such as iron) will have less volume than an object of equal mass made from some less dense substance (such as water).
a metal used in hot water systems
Answer:
I think this would be iron
Explanation:
In a Food web the arrow always points to?
Answer:
All food chains start with a producer. The arrows in the food chain below depict the direction in which energy and nutrients flow, i.e. the arrow always points from the eaten to the eater.
hope this helps please mark me brainiest
Answer:
Consumeer
Explanation:
Help me about it please
Answer:
4 atoms of Hydrogen
1 atom of Sulphur
4 atoms of Oxygen
hope it helps you
make me brainliest plz
If you evaporated 125 mL of a 3.5 M solution of iron(II) nitrite, how many moles of iron(II) nitrite would you recover?
If 125 mL of a 3.5 M solution were evaporated, 0.438 moles of iron (II) nitrite would be recovered.
What is molarity?Molarity is a measure of the concentration of a chemical species, in particular of a solute in a solution, in terms of moles of solute per liter of solution.
We want to find the moles of iron (II) nitrite (solute) in 125 mL of a 3.5 M solution. We will use the definition of molarity.
M = n / V(L)
n = M × V(L) = 3.5 mol/L × 0.125 L = 0.438 mol
where,
M is the molarity.n is the number of moles.V(L) is the volume of the solution in liters.If 125 mL of a 3.5 M solution were evaporated, 0.438 moles of iron (II) nitrite would be recovered.
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On average, California experiences two to three more earthquakes large enough to cause moderate structural damage, a magnitude of 5.5 or higher, each
year. North Dakota experiences on average less than 1 earthquake per year. The largest earthquake ever recorded in North Dakota had a magnitude of
4.4
Why is California at a higher risk for earthquakes than North Dakota?
Answer:
The driving force of earthquakes in California is movement along the San Andreas Fault and the many associated faults within the San Andreas Fault System that form the tectonic boundary between the Pacific and North American tectonic plates.
Explanation:
A medium that works by showing two reaction types, such as a color change in some colonies but not in others is called a(n)
A medium that works by showing two reaction types is called a differential medium
Differential mediaDifferentia media are one of the numerous culture media used in culturing microorganisms. They are also known as indicator media.
They are called differential media because they are able to make a distinction between two microorganisms growing on them based on the biochemical characteristics of some organisms in the presence of certain indicators or nutrients.
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If the air from the problem above contains 22% oxygen, 75% nitrogen and 3% argon, what is the partial pressure of oxygen near a blast furnace in mmHg?
Assuming the total pressure is 1 atm, the partial pressure of oxygen is 0.22 atm.
What is the partial pressure of oxygen if air contains 22% oxygen, 75% nitrogen and 3% argon?The partial pressure of a gas in a mixture of gases is calculated using the formula below:
Partial pressure of a gas = mole fraction/total pressureAssuming:
the total pressure is 1 atm.mole fraction of oxygen = 22% = 0.22Partial pressure of oxygen = 0.22/1
Partial pressure of oxygen = 0.22 atm.
Therefore, assuming the total pressure is 1 atm, the partial pressure of oxygen is 0.22 atm.
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Can someone help me with this ASAP Pleasee !!
Explanation:I help You :) only two answer
14) During che distry class, Cort performed several lab tests on two white solids. The results of three tests are seen in the data table. Based on this data, Carl has concluded that substance
have bonds.
A) covalent
B) diatomic
C) ionic
D) metallic
Weathering can change the physical characteristics of an area. Which statement is an example of chemical weathering?
Freezing and thawing of water expand cracks in rock.
Plant roots growing into cracks in rock force the rock to break.
Rain mixes with pollutants in the air to interact with rock.
Glaciers grind away rock as they pass over it.
Answer:
"Rain mixes with pollutants in the air to interact with rock" is an example of chemical weathering
Explanation:
The first statement refers to something known as "freeze thaw" which is mechanical weathering.
The second and fourth statements also refer to mechanical weathering
Electromagnetic fields travel by transferring energy:
1) from particle to particle.
2) between electric and magnetic fields.
3) between magnetic fields only.
4) between electric fields only.
Answer:
between electric and magnetic fields is answer
Answer:
Electromagnetic fields travel by transferring energy between electric and magnetic fields.
Explanation:
The electric and magnetic fields are perpendicular to each other and are also perpendicular to the direction of propagation of the wave.
Equations can be balanced by using the half-reaction method. Which step should be completed first when using this method? inserting the coefficients balancing the half reactions identifying the half reactions finding the oxidation states of atoms.
The step to be completed first while using the half-reaction is balancing the equation. Thus, option B is correct.
The half-reaction is the oxidation or the reduction reaction of the redox reaction. The oxidation is given as the loss of electrons, and reduction is given as the gain of electrons.
How do you balance a half-reaction?The half-reaction in the cell consists of the change in the electrons and the oxidation state of the elements. The oxidation and reduction reactions are balanced by inserting the equation.
The first step in using the half-reaction is the balancing of reaction. Thus, option B is correct.
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the answer is D I hate it when people troll
