Answer:
About 67 grams or 67.39 grams
Explanation:
First you would have to remember a few things:
enthalpy to melt ice is called enthalpy of fusion. this value is 6.02kJ/mol
of ice
it takes 4.18 joules to raise 1 gram of liquid water 1 degree C
water boils at 100 degrees C and water melts above 0 degrees C
1 kilojoules is 1000 joules
water's enthalpy of vaporization (steam) is 40.68 kJ/mol
a mole of water is 18.02 grams
we also have to assume the ice is at 0 degrees C
Step 1
Now start with your ice. The enthalpy of fusion for ice is calculated with this formula:
q = n x ΔH q= energy, n = moles of water, ΔH=enthalpy of fusion
Calculate how many moles of ice you have:
150g x (1 mol / 18.02 g) = 8.32 moles
Put that into the equation:
q = 8.32 mol x 6.02 = 50.09 kJ of energy to melt 150g of ice
Step 2
To raise 1 gram of water to the boiling point, it would take 4.18 joules times 100 (degrees C) or 418 joules.
So if it takes 418 joules for just 1 gram of water, it would take 150 times that amount to raise 150g to 100 degrees C. 418 x 150 = 62,700 joules or 62.7 kilojoules.
So far you have already used 50.09 kJ to melt the ice and another 62.7 kJ to bring the water to boiling. That's a total of 112.79 kJ.
Step 3
The final step is to see how much energy is left to vaporize the water.
Subtract the energy you used so far from what you were told you have.
265 kJ - 112.79 kJ = 152.21 kJ
Again q = mol x ΔH (vaporization)
You know you only have 152.21 kJ left so find out how many moles that will vaporize.
152.21 kJ = mol x 40.68 or mol = 152.21 / 40.68 = 3.74 moles
This tells you that you have vaporized 3.74 moles with the energy you have left.
Convert that back to grams.
3.74 mol x ( 18.02 g / 1 mol ) = 67.39 grams
1. Which subatomic particles (electrons, neutrons, protons) affect stability?
2. Which subatomic particles affect charge?
3. Which subatomic particle changes the element?
Answer:
1 is protons and neutrons
2 is electrons and protons
3 Is protons
*
Compared with a mole of silver atoms, a mole of calcium atoms
O cannot be determined
O has fewer atoms
O has more atoms
O has the same number of atoms
to be honestl id ldm
Each component retains its own properties in a mixture.
true or false
Answer:
No it's false actually it's two or more components
Hope it helps :-):-)
Answer:false
Explanation:
Can a non-metal replace a metal in a single replacement reaction? If yes, is a non-metal always not able to replace a metal in a single replacement reaction?
Non-metals will never replace metals or vice versa, they'll only replace itself or the only type of reaction that it is or element that it is.
How does density affect sinking and floating in water?
Answer:
Density is a measure of how heavy something is compared to its size.
If an object is more dense than water it will sink when placed in water, and if it is less dense than water it will float.
Density is a characteristic property of a substance and doesn’t depend on the amount of substance.
Explanation:
If you compared the weight of wood and an equal amount, or volume, of water the sample of wood would weigh less than the sample of water. This means that wood is less dense than water. Since wood is less dense than water, wood floats in water, no matter how big or small the piece of wood is.
A student might want to know why a boat made out of steel can float when steel is more dense than water. This is not an easy question and requires a different approach than what students have seen so far. We do not necessarily recommend the following explanation for 5th graders but here is the idea:
An object floats when it displaces a volume of water that has a mass equal to the mass of the object. So if a material like steel is shaped into a boat and made larger and larger, it will displace more and more water. When it is large enough to displace a volume of water that has a mass equal to the mass of the boat, the boat will float.
write the 5 major characteristics of traditional map making
Answer:
insta
Explanation:
Zak_1231 follow me
2. Differentiate the types of tectonic plates.
Answer:
Explanation:
Convergent boundaries: where two plates are colliding. Subduction zones occur when one or both of the tectonic plates are composed of oceanic crust. ...
Divergent boundaries – where two plates are moving apart. ...
Transform boundaries – where plates slide passed each other.
Although a scientific theory is well supported and widely accepted, what might cause it to change? HELPPP
a new evidence
b scientific law
c indivial claim
D a scientific model
Answer:
d
Explanation:
The volume of a balloon is 30 L at 313K and a pressure of 153KPA What is the volume at 273K and 101.3kPa?
Answer:
Explanation:
The volume of a balloon is 30 L at 313K and a pressure of 153KPA What is the volume at 273K and 101.3kPa?
from PV=nRT we can derive
PV/T =P'V'/T' so
153X30/313 = 101.3 X V'/273
OR 153 X 30 X273/(313 X 101.3) =V'
V' = 39.5 L
Is this statement true or false?
A chemical reaction is balanced when the number of atoms of each element is the same for both the reactants and the products.
true
false
Answer:
truetysm
tysm
tysm dear
where on the periodic table are noble gases found?
Answer:
The farthest to the right of the Periodic Table. They have 8 valence electrons. Some Noble gases are Helium, Neon, and Argon.
Stems have all of these functions EXCEPT
a storing food and water
b. absorbing soil nutrients
C. supporting the plant
d. moving materials between leaves and roots
Answer:
B or A
Explanation:
choose wether A or B... give it a higher level of thinking. and good luck!
Answer:
Its b!
Explanation:
its just common sense at this point lol.
How many moles of ions are there in 1 mole of iron (III) oxide, Fe2O3?
Answer:
So one mole of Fe2O3 contains two moles of Fe3+ ions.
Explanation:
As there is an internal mole ratio of 2:3
It means that there are 2moles of iron within every mole of iron(III) oxide.
Iron III oxide is an ionic compound composed of Fe3+ ions and O2- ions. According to the formula, there are three O2- ions for every two Fe3+ ions.
Extra:
One 'unit' of Fe2O3 has two Fe3+ ions and three O2- ions, hence a dozen Fe2O3 contains two dozen Fe3+ ions and three dozen O2- ions, and a mole Fe2O3 contains two moles Fe3+ ions and three moles O2- ions.
1. Given the word equation:
sodium chlorate → sodium chloride + oxygen
Which type of chemical reaction is represented by
this equation?
A) double replacement
B) single replacement
C) decomposition
D) synthesis
Answer:
Decompositon
Explanation:
Sodium chlorate → Sodium Chloride + Oxygen
Sodium chlorate is reactant.
Sodium chloride + Oxygen is the product.
Definition : -
Decomposition reaction is a chemical reaction in which a single reactant breaks down to simpler products.
What is the main idea of science? (states of matter)
Answer:
STATES OF MATTER AREliquid statesolid stategaseous stateHow many atoms are in 3 C2H6
NO2 is a reddish brown color while N2O4 is colorless. Based on this information only, which type of spectroscopy would be a good choice to determine the identity of an unknown sample that contains either
NO2 or N2O4?
Spectroscopy is is an area of science that deals with interaction of matter and the electromagnetic spectrum. Colorimetry can distinguish between a colorless and a colored substance.
The type of spectroscopy that would be a good choice to determine the identity of an unknown sample is a type of spectroscopy that deal with the interaction of visible light with matter.
A type of spectroscopy that deals with interaction of visible light with matter is colorimetry. Colorimetry can measure the concentration of a substance as a function of the amount of light that is absorbed by the substance.
Since NO2 has a reddish brown color, its concentration can be measured using colorimetry. The concentration of N2O4 can not be measured using colorimetry because it is colorless.
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Which of the responses contains all the true
statements and no others regarding
electromagnetic radiation (light)?
If there are 100 black beans, 27 brown beans, and 173 white beans in the container, what is the percent composition of the container by bean
Answer:
300
Explanation:
Las legumbres son semillas de plantas grandes, carnosas y coloridas. Los frijoles, los guisantes (arvejas) y las lentejas son todos tipos de legumbres.
In an experiment combining vinegar and baking soda, gas is given off. In this
chemical reaction, the vinegar and baking soda are…
A elements
B products
C suspensions
D reactants
Answer:
The correct answer is D hope this helped :3Answer:
(D)
Explanation:
In the reaction between vinegar and baking soda, the reactants are vinegar (acetic acid) and baking soda (sodium bicarbonate). The products are sodium acetate, water, and carbon dioxide gas.
6) Which of the following would travel the farthest in column chromatography?
a. CH3CH2CH2COOH
b. C6H6
c. CH3OH
d. C8H18
The answer would be C8H18, or octane. Column chromatography is a separation technique that works off of polarity. The stationary phase, in column chromatography, are non-modified silica gels. Silica gels are normally polar. This means the solvent that will elute first are non-polar molecules...then polar molecules. The polar silica gels have a stronger interaction with polar molecules like CH3OH, and therefore will lag the solvent. Additionally, as you decrease the carbons, in hydrocarbons, the molecule becomes more polar. This is not C6H6 isn't the answer and octane is.
C8H18 will travel the farthest in column chromatography.
Chromatography is know as a process of analyzing and purifying organic compounds.There are different forms of chromatography. there is the column chromatography, Gas chromatography etc.
Alkanes are known to be least polar and as such would travel farthest into the mobile phase of the four functional groups. C8H18 belongs to the alkanes family.
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A test tube is filled with water and a green plant called elodea.
Answer: The bubbles produced are most likely due to oxygen.
Explanation:
Photosynthesis is a phenomenon in which green plants containing chlorophyll use sunlight as a source of energy to convert carbon dioxide and water to form glucose and oxygen.
The balanced chemical reaction for photosynthesis is:
Nitrogen gas is more abundant and I miss her than oxygen however nicer than to be converted into different forms to be used by many organisms bacteria are highly involved in this describe the role of a bacteria fixing nitrogen as he lives in Barclay with some plant species be nature find bacteria and see did you find bacteria in the nitrogen cycle
Answer:
who lives in Barclays what?? this makes no sense
Explanation
Help meeeeeeeeeeeeeee
Answer:
4) 2Na + Cl2 → 2NaCl
5) 2Mg + O2 → MgO
6) 2H2 + 2O2 → 2H2O
Explanation:
4) In order for it to be well balanced, yeah you've got to add 2 in front of Na before the reaction and after the reaction.
5) Add 2 in front of Mg bcuz of the same reason in number 4 but you don't have to add 2 in front of the others bcuz it's alrd well balanced.
6) Tbh for this one, it got me staring at my cat until he freaks out but like yeahh, I tried :')
Each school day, it takes Mrs. Wohlfert an hour to drive 50.3 miles to drop Dezzie off at daycare. While she travels on US 20, she looks at her speedometer and it says she's going 75 mph, so she better slow down! Once she arrives in Plymouth, she takes 5 minutes to get Dezzie into daycare and say goodbye. It takes Mrs. Wohlfert 10 minutes to drive the 3.9 miles between daycare and Lincoln. Mrs. Wohlfert stays at school for the day for 8 hours, then leaves Lincoln to pick up Dezzie at daycare and head home.
What is Mrs. Wohlfert's total distance traveled in a day?
What is Mrs. Wohlfert's total time travelling from when she leaves her house in the morning to when she gets back home in the afternoon?
What was Mrs. Wohlfert's instantaneous speed that she saw during her trip to school?
Answer:
7.06
Explanation:
because its improper
How to determine the speed of light.
Please, if you wish not to receive multiple notifications, ignore answering this, for which you will be stressed and annoyed.
Answer:
Hey mate....
Explanation:
This is ur answer....
By adjusting the path length while observing the interference pattern and carefully measuring the change in path length, the wavelength of the light (λ) can be determined. The speed of light is then calculated using the equation c = λf.
Hope it helps!
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Is there a relationship between atomie radius and electronegativity? Why or why not?
Answer:
Yes
Explanation:
Electronegativity is the tendency for atoms to keep electrons closer to them. So, if the atoms are smaller there, there is a stronger pull on the electrons to keep them closer. So, the larger the atom get, due to electron shielding, it become less electro negative. I hope this help. You might get a better explanation from Khan Academy's video on Electronegativity
Answer:
A relationship is intuitively expected
Does electronegativity relate to atomic radius? A relationship is intuitively expected between electronegativity and radius: the size of an atom is determined by the distribution of electrons around its nucleus. The closer the electrons are to the nucleus, the more tightly they are bound, thus increasing the electronegativity of the atom.
Explanation:
Explain Rutherford’s gold foil experiment. What particle did he discover?
Answer:
this my answer
Explanation:
Rutherford's gold foil experiment showed that the atom is mostly empty space with a tiny, dense, positively-charged nucleus. Based on these results, Rutherford proposed the nuclear model of the atom.(NEED ANSWER NOW)
Redshift is observed when:(1 point)
A. a luminous object is stationary relative to an observer.
B. a luminous object is traveling alongside an observer.
C. a distant luminous object travels rapidly towards an observer.
D. a distant luminous object travels rapidly away from an observer.
Answer:it’s C
Explanation:
A distant luminous object travels rapidly away from an observer.
Redshift is observed when a distant luminous object travels rapidly towards an observer. Thus option C is correct.
What is luminous object?Luminous object is defined as the sun is an example of a luminous object, whereas a non-luminous object is one that cannot create light.
It is also defined as objects that can generate their own light energy.
Non luminous object is defined as one that does not generate its own light but can reflect light from other sources.
It can also defined as object which do not generate their own light.
Redshift is defined as when the wavelength of the light is extended, it seems to be shifted towards the red section of the spectrum.
Thus, redshift is observed when a distant luminous object travels rapidly towards an observer. Thus option C is correct.
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write name of the functional group
Answer:40=6*6(6+5)8x42
Explanation: so yea