Answer:
a natural process is water cycle.
Explanation:
during this process,water evaporates from different water bodies ,when the warm water rises,the cold and heavier water comes down to take its place.On the other hand,the warm water on rising,changes to water vapour.
This water vapour helps in the formation of clouds .
When the cloud becomes heavy and is not able to hold the water vapour, it falls down as rain or snow depending upon the climate and atmospheric temperature.
This process continues over and over again
How many grams of iron(III) oxide would be required to make 187 g of iron
Answer:267 g
Explanation:
Answer:
267 g
Explanation:
how many grams of cesium fluoride would be required to make 73.1 g of cesium xenon heptaflouride?
The mass of cesium fluoride which is required to make 73.1 g of cesium xenon heptaflouride is 27.6 grams.
What is the relation between mass & moles?Relation between the mass and moles of any substance will be represented as:
n = W/M, where
W = given massM = molar massMoles of CsXeF₇ = 73.1g / 397g/mol = 0.184mol
Given chemical reaction is:
CsF + XeF₆ → CsXeF₇
From the stoichiometry of the reaction, it is clear that:
0.184 moles of CsF required = to react with 0.184 moles of CsXeF₇
Now we convert this moles of CsF into mass as:
W = (0.184mol)(150g/mol) = 27.6 g
Hence required mass of CsF is 27.6g.
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Which of the following gases will diffuse the fastest at room temperature?
H2
Ne
He
O2
Answer:
I am pretty sure that it is A. H2.
Explanation:
Sorry if it's wrong.
Adding concentrated
sulfuric acid to sugar
What reaction is this?
Answer:
Dehydration of Sugar
Explanation:
18. Which statement best describes the balanced chemical equation?
Answer:
It is endothermic and entropy increases.
Explanation:
What slows down heat energy from escaping the Earth?
Answer:
Greenhouse gases such as carbon dioxide and water vapor make an atmosphere around the earth and make less heat escape
Explanation:
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In the diagram, the lines dividing the parking spaces are parallel. What must be true about 1 and 22? What theorem
supports your conclusion?
A. 21 and 22 are supplementary; alternate exterior angles theorem
B. 21 22; alternate exterior angles theorem
C. 21 and 22 are supplementary; consecutive exterior angles theorem
D. Z1 Z2; consecutive exterior angles theorem
Mark this and return
Save and Exit
Next
Submit
Answer:
B. ∠1 ≅ ∠2; alternate interior angles theorem
Explanation:
Assume the diagram is like the one below.
The blue lines are parallel, and the red line is a transversal.
∠s 1 and 2 are between the parallel lines but on opposite sides of the transversal.
They are alternate interior angles.
Pairs of alternate interior angles are congruent.
A. is wrong. Alternate interior angles are congruent.
C. is wrong. Consecutive exterior angles are outside the parallel lines and on the same side of the transversal. They are like the two angles marked with a blue x. They are supplementary.
D is wrong. Consecutive exterior angles are supplementary.
Over long periods of time, some species have become extinct, while new species have
descended from earlier species. These changes are known as:
Evolution
Mutation
Natural selection
Adaption
Answer:
Adaption
The reason why its adaption is because some species become extinct due to not adapting to world changes, while newer species can adapt to world changes.
Hope this helps!
Hexyne. What does the name of this hydrocarbon tell you about its molecular structure?
OA.
There are six parent carbon atoms and one triple carbon bond.
There are six parent carbon atoms and one double carbon bond.
B.
C. There are seven parent carbon atoms and one triple bond.
D. There are eight parent carbon atoms and all single carbon bonds.
E.
There are eight parent carbon atoms and one triple bond.
Answer:
Hexyne. What does the name of this hydrocarbon tell you about its molecular structure?
A.There are six parent carbon atoms and one triple carbon bond.
B.There are six parent carbon atoms and one double carbon bond.
C. There are seven parent carbon atoms and one triple bond.
D. There are eight parent carbon atoms and all single carbon bonds.
E.There are eight parent carbon atoms and one triple bond.
Explanation:
The correct answer is A. The prefix "hex-" indicates that there are six carbon atoms in the molecule, and the suffix "-yne" indicates that there is a triple bond between two of the carbon atoms. Therefore, hexyne has six carbon atoms and one triple bond.
How is gold related to suns life cycle?
Answer: Gold is shiny and bright just like the sun. Gold is yellow.
Explanation:
What does X represent for this transmutation?
96242Cm + X→ 98245Cf + 01n
gamma
+10e
24He
−10e
Answer:
24He
Explanation:
When a nuclide is bombarded with alpha particles, we notice an increase in its mass and charge since an alpha particle has a mass of four and a charge of +2. recall that nuclear equations must be balanced. That is, the masses and charges on the left hand six and the right hand side of the nuclear reaction equation must be exactly the same.
Looking at the nuclear reaction at hand, the total mass on the left hand side has to be 246 while the total charge on the left hand side of the equation will be 98. Coming over to the right hand side, the total masses are also found to be the same as a neutron with no charge and a mass of 1 is produced. Hence the nuclear reaction equation is balanced when an alpha particle (helium nucleus) is substituted for X in the equation.
Answer:
24HE
I took the test!
Which of the following best describes the main function of the nervous system?
To deliver nutrients and other essential materials to cells and remove waste products
To break down the nutrients found in food so that they can be used by all cells in the body
To produce the chemical signals that allow parts of the body to communicate over long distances
To coordinate all other body systems so that they can function together to maintain homeostasis
Which statement best describes liquid water and water vapor at equilibrium?
A. Liquid water stops entering the gas phase.
O B. The concentration of liquid water equals the concentration of
water vapor.
C. The concentrations of liquid water and water vapor are stable.
D. The concentration of liquid water is zero.
C. The concentrations of liquid water and water vapor are stable. it describes the fact that liquid water and water vapor are at equilibrium.
EquilibriumAn equilibrium is achieved when no more water vapor can enter into the gas phase from the liquid water during evaporation process. This happens when a saturation is attained between liquid water and the vapor phase.Hence, option (c) is correct. The concentration of liquid water and water vapor will become stable.
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How can the motion of atoms in the solid state of most substances be described?
Answer:
The molecules in a solid are stuck in a specific structure or arrangement of atoms. The atoms still vibrate and the electrons fly around in their orbitals, but the entire atom will not change its position.
Which of these structures are found in plant cells but not animal cells?
A. Gogi apparatus
B. mitochondria
C. lysosomes
D. cell wall
Answer:
A
Explanation:
Answer:c
Explanation:
Which resulted from the study of chemistry?
A) Alchemy to turn base metals into noble metals
B) the understanding of earth, air, fire, and water as the basic components of matter.
C) discovering the role of oxygen in combustion
D) a supernatural, mystical view of the world
Identify 5 things that would happen if there is not electricity.
Answer:
Living with no electricity might not be as easy as you may think and you not realise how many items in your home rely on it to function.
Electrically managed technologies supply us with many things, such as heat, food, water, transport, energy, entertainment and communication. Electricity allows us to power the technology we use every day. If you plan on trying to live without electricity, you will no longer be able to turn on the central heating in your home, use the toilet, preserve food in your fridge/freezer or have clean running water. Despite surviving thousands of years without it before, we have come to depend on it to complete our everyday tasks and have built our lives around it.The Internet goes down.Why were scientists surprised to find coal in the arctic?
Answer:
coal is made from compressed plant matter and how exactly did plants grow on the surface of an ocean. (as there is no land mass beneath the arctic.)
Explanation:
it would be like finding a fly in an ice cube to simplify it.
They were surprised to find coal in arctic because ordinarily coal was supposed to be found in warm or hot environments and not cold region like the arctic.
The arctic is located at the far northern part of the world which is characterized by its extreme cold weather.
A limited vegetation of plants such as grasses, mosses and lichens are found in this region irrespective of the extreme cold weather through out the year.
Coal is a type of fuel gotten from fossils and deposits of plant vegetation.
Scientist has discovered that continents do move over time through a process called continental drift. This is the reason why limited vegetaion is found in the arctic leading to the formation of coal.
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In which phase of a substance do its particles have the greatest average kinetic energy?
Answer:
Gas
Explanation:
Molecules in the solid phase have the least amount of energy, while gas particles have the greatest amount of energy. The temperature of a substance is a measure of the average kinetic energy of the particles.
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The particles in the gaseous phase of a substance have the greatest average kinetic energy.
What is the average kinetic energy?The average kinetic energy refers to the kinetic energy accompanied by the maximum number of molecules whereas total kinetic energy is the kinetic energy of the total number of moles of gas molecules.
The total kinetic energy of molecules in a gas is determined by using the following formula,
Total Kinetic Energy = (3/2)nRT
Where R is the gas constant, n is the number of moles of gas, and T is the temperature of the reaction.
At any given temperature, all of the molecules of a sample do not have the same kinetic energy. Instead of that, the particles show a wide range of kinetic energies.
The average kinetic energy of the particles in the solid phase is the least and the particles or molecules in the gaseous phase have the greatest average kinetic energy.
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The addition of heat causes the individual particles of a solid to
Answer:
Move rapidly or move fast and farther apart. Hope this helps.
Answer: vibrate more rapidly
Explanation:
Why would the pressure of a sample of gas at a constant volume fall .10 atm?
Answer:
As the temperature of a sample of gas falls from 45.0ºC to 30.0ºC, its pressure falls to 300.
Explanation:
I just need the answer please to both if you can
Answer:
No.4 is B No.5 is d
Explanation:
Answer:
Q 4: d
Explanation: this is all I can answer
3. Trees, bananas, skateboards and pancakes are all solids. They have
atoms that are closely packed together and don't move around very
much. Solids also have definite shape, mass and volume. "Definite"
means that it doesn't easily change. When you pour cereal into a bowl,
the pieces of cereal don't change shape. But when you pour milk into a
bowl, the milk takes the shape of the bowl. That's because cereal is a
solid.
A
Which of the following is an example of a solid?
A. applesauce
Corange juice
B. watermelon
D. berry smoothie
Answer:
B. Watermelon
Explanation:
Watermelon is the only option with a definite shape that wouldn't change if you put it in a bowl
Index fossils are found throughout the world and come from organisms which existed during limited periods of geologic time. Which of the following best describes what index fossils can be used to determine?
A.
the age of a layer of rock
B.
when an organism first appeared on Earth
C.
how an organism evolved over time
D.
the way an organism went extinct
Answer: A. the age of a layer of rock
Explanation:
Index fossils are of organisms that lived over a wide area. They lived for a fairly short period of time.
Index fossils are found throughout the world and come from organisms which existed during the limited periods of geologic time. Index fossils can be used to determine the age of a layer of rock. Thus, the correct option is A.
What is Index fossil?Index fossil is any kind of animal or plant that is preserved in the rock record of the Earth which is characteristic of a particular span of geologic time. A useful index fossil must be distinctive or is easily recognizable, abundant, and have a very wide geographic distribution and also a short range through time.
Index fossils are used to define the geological periods or the age of a layer of rock. These fossils can be defined as the commonly found, widely distributed fossils that are limited in time span. If a person finds an index fossil in a given layer, then he has bounds on the age of the layer.
Therefore, the correct option is A.
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Referencing the reasoning you used from #1, explain the difference between objects that feel hot and those that
feel "cold".
Answer:
The temperature of the cold water is lower than the warm one. So, when we put the hand in the warm from the cold water, our hand will absorb heat, causing the hand to feel hot. Thus, we can conclude that the more heat it absorbs, the more hotter it is. Whereas the more heat it releases, the colder it is.
How many Liters are in 17.3 moles of Iron?
Answer:
There are 0.12269 Liters of Iron
Explanation:
First, by means of the molecular weight equation, the grams of iron corresponding to 17.3 moles can be calculated:
[tex]MW=\frac{mass(grams)}{moles}[/tex]
[tex]mass=MW*moles=55.845\frac{g}{mol} *17.3mol=966.119 g[/tex]
Then using the density equation the iron milliters are calculated:
[tex]d=\frac{mass(g)}{volume(mL)}[/tex]
[tex]volume=\frac{mass}{density}=\frac{966.119g}{7.874\frac{g}{mL} } =122.69 mL[/tex]
Milliliters to liters are converted:
122.69 mL = 0.12269 L of Iron.
Answer:
[tex]V_{Fe}=0.125L[/tex]
Explanation:
Hello,
In this case, given the moles of iron, we need to use it atomic mass (55.845 g/mol) and density (7.874 g/cm³) in order to firstly convert from moles to grams and secondly from grams to cubic centimetres:
[tex]V_{Fe}=17.6molFe\times \frac{55.845gFe}{1molFe}*\frac{1cm^3}{7.874gFe}=124.8cm^3[/tex]
Finally, we obtain the volume in litres by:
[tex]V_{Fe}=124.8cm^3*\frac{1L}{1000cm^3} \\\\V_{Fe}=0.125L[/tex]
Best regards.
What is the key building block of living tissue and ecosystems?
Hope u can help!
Answer:
Your answer is cells. Hope this helps!
A curved piece of glass or other transparent material that is used to refract light is called a (an) _____.
A) mirror
B) lens
C) reflector
D) optical fiber
Answer:
Lens
A curved piece of glass or other transparent material that is used to refract light.
Explanation:
u got ig?
A curved piece of glass or other transparent material that is used to refract light is called a lens. The correct option is B).
What are lenses?A curved piece of transparent material, such as glass, that bends light is called a lens. A lens's shape and the object's position both affect the kind of image it produces.
The center of a concave lens is thinner than the edges. Bent glass is defined as glass that has been curved or bent into a convex or concave shape. The desired shape is created by gently heating the glass until it becomes pliable, then molding it into that shape.
Light is refracted through lenses. When a light beam enters a lens, it is refracted; then, when it leaves the lens, it is refracted once more.
Therefore, the correct option is the B) lens.
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Which of the following would form an electrolyte solution?
O A. Oil in water
B. Sand in water
C. Sugar in water
D. Salt in water
Answer:
D: Salt in water
Explanation:
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63.2 g of BaCl 2 are dissolved in enough water to make a 634 mL solution. What is the molarity?
Answer:
0.479 M or mol/L
Explanation:
So Molarity is moles/litres of solution...often written as M=mol/L
So here we are given grams of BaCl2 which we have to convert to moles. To convert to moles of BaCl2 we have to divide 63.2 g BaCl2 by molar mass of BaCl2 which is 208.23 g/mol so you get 63.2/208.23 = 0.3035 moles of BaCl2
Second step is converting the 634mL to litres by simply dividing by 1000 because we know 1 litre has 1000ml so 634/1000 = 0.634L
Now we just plug these guys in our molarity formula M=mol/L
M= 0.3035/0.634 = 0.479 M or mol/L
Answer:
Interestingly enough, I'm not getting
0.0341% w/v
either. Here's why.
Start by calculating the percent composition of chlorine,
Cl
, in calcium chloride, This will help you calculate the mass of chloride anions,
Cl
−
, present in your sample.
To do that, use the molar mass of calcium chloride, the molar mass of elemental chlorine, and the fact that
1
mole of calcium chloride contains
2
moles of chlorine atoms.
2
×
35.453
g mol
−
1
110.98
g mol
−
1
⋅
100
%
=
63.89% Cl
This means that for every
100 g
of calcium chloride, you get
63.89 g
of chlorine.
As you know, the mass of an ion is approximately equal to the mass of the neutral atom, so you can say that for every
100 g
of calcium chloride, you get
63.89 g
of chloride anions,
Cl
−
.
This implies that your sample contains
0.543
g CaCl
2
⋅
63.89 g Cl
−
100
g CaCl
2
=
0.3469 g Cl
−
Now, in order to find the mass by volume percent concentration of chloride anions in the resulting solution, you must determine the mass of chloride anions present in
100 mL
of this solution.
Since you know that
500 mL
of solution contain
0.3469 g
of chloride anions, you can say that
100 mL
of solution will contain
100
mL solution
⋅
0.3469 g Cl
−
500
mL solution
=
0.06938 g Cl
−
Therefore, you can say that the mass by volume percent concentration of chloride anions will be
% m/v = 0.069% Cl
−
−−−−−−−−−−−−−−−−−−−
I'll leave the answer rounded to two sig figs, but keep in mind that you have one significant figure for the volume of the solution.
.
Explanation:
