a 5.00-g sample of aluminum pellets (specific heat capacity 0.89 j/c g) and a 10.00-g sample of iron pellets (specific heat capacity 0.45 j/c g) are heated to 100.0c. the mixture of hot iron and aluminum is then dropped into 97.3 g of water at 22.0c. calculate the final temperature of the metal and wa- ter mixture, assuming no heat loss to the surroundings.
Answers
The final temperature of the metal and water mixture when no heat loss to the surrounding is 23.7 degree Celsius.
The mass of the aluminium Pellet is 5 gram, specific heat of Aluminium is given to be 0.89 J/C-g
The mass of iron pellets is 10 gram and specific heat of iron is given to be 0.45 J/C-g.
They are heated to a temperature of 100° Celsius they are dropped into water of mass 97.3 grams which is at temperature of 22° Celsius.
As there is no heat loss,
The total heat eliminated by aluminium and will be equal to the heat gained by water,
So, we can write, heat released or gained,
Q = mC∆T
Where,
Q is the heat eliminated by aluminium and iron,
M is the mass of substance,
∆T is the change and temperature.
If we assume that T is the final temperature of the system when aluminium and iron are dropped in the water,
For iron,
Q = (5)(0.89)(100-T)
Q = (10)(0.45)(100-T)
For water,
Q = (97.3)(4.184)(T-22)
So,
Heat lost by aluminium and iron = heat gained by water,
(5)(0.89)(100-T) + (10)(0.45)(100-T) = (97.3)(4.184)(T-22)
T = 23.7° C.
The final temperature of the system is 23.7 degree Celsius
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Related Questions
How is the Separation of a Compound different
from that of a mixture?
Answers
what conditions must be met in order for an aqueous solution to be called ""neutral""?
Answers
In order for an aqueous solution to be called "neutral", it must have a pH of 7.
This means that the concentration of hydrogen ions (H+) and hydroxide ions (OH-) in the solution are equal, making it neither acidic nor basic. A solution can become neutral through various methods such as adding a base to an acidic solution or an acid to a basic solution until the pH reaches 7. Another way to create a neutral solution is by mixing an acid and a base in equal amounts to produce a salt and water, which is neither acidic nor basic. It is important to note that a neutral solution is not necessarily pure water as other substances may be dissolved in it. A solution can be tested for neutrality using pH paper or a pH meter to measure the concentration of H+ and OH- ions present.
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An aqueous solution is considered "neutral" when it has a pH of 7. It means the solution has an equal concentration of hydrogen ions and hydroxide ions.
Explanation:In order for an aqueous solution to be called "neutral", it must have a pH of 7. The pH scale measures the acidity or alkalinity of a solution. A neutral solution has an equal concentration of hydrogen ions (H+) and hydroxide ions (OH-).
An example of a neutral solution is pure water, which contains an equal number of H+ and OH- ions.
If a solution has a pH less than 7, it is considered acidic, while a pH greater than 7 indicates alkalinity.
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HURRY DONT HAVE MUCH TIME LEFT. Vegetarians do not eat animal products but rather derive their protein from plant sources. Which type of protein do vegetarian food sources lack?
Answers
Answer:
b12 and d3
Explanation:
which compounds do not have the same empirical formula?
Answers
Compounds can have different empirical formulas if the ratio of their elements is not the same. To identify which compounds do not have the same empirical formula, we need to compare the ratios of elements in each compound.
The empirical formula of a compound represents the simplest ratio of elements present in the compound. For compounds to have the same empirical formula, the ratios of their elements must be equal.
To determine which compounds do not have the same empirical formula, we need to compare the ratios of elements in each compound. This can be done by analyzing the chemical formulas of the compounds.
For example, let's consider two compounds, Compound A with the formula C2H4O and Compound B with the formula CH2O. To find their empirical formulas, we simplify the ratios of elements. In Compound A, the ratio of carbon to hydrogen to oxygen is 2:4:1, which simplifies to C1H2O0.5. In Compound B, the ratio is 1:2:1, which simplifies to CH2O.
By comparing the simplified ratios, we can see that the empirical formulas of Compound A and Compound B are different. Therefore, these compounds do not have the same empirical formula.
In conclusion, to identify compounds that do not have the same empirical formula, we need to compare the ratios of elements in each compound. If the ratios are not equal, the compounds will have different empirical formulas.
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is this reaction oxidation or reduction
CH2=CH2 + OsO4 yields to HOCH2CH2OH
Answers
Answer:
it's definitely a oxidation reaction because here the oxygen contained OH group present in yeild
How would it have been if particles of matter had no space?
Answers
Answer:
Matter is made of small particles of atoms or molecules. ... The particles in the solid are touching with very little space between them. The particles in a liquid usually are still touching but there are some spaces between them. The gas particles have big distances between them.
I just got confessed to
but i only like the person 89% out of 100...
what should I do ?
Answers
Answer:
:)haha
Explanation:
Answer:
:D
Explanation:
What type of reaction is
2H₂O → 2H₂ + O2
single displacement
double displacement
decomposition
synthesis
combustion
Answers
Answer:
The type of reaction is decomposition.
Material
Mass
Tfinal
AT
Tinitial
min
(g)
O min
Water
200
Water
100
Answers
Most chemical bonds are
Select one:
O a purely ionic.
stion
O b. purely covalent.
O c. partly ionic and partly covalent.
Od, metallic.
Answers
Answer:
partly ionic and partly covalent
What happens to water once it moves from earths surface to the atmosphere
Answers
Answer:
Evaporation
Explanation:
Water at the surface of the ocean rivers and lakes can become water vapor and move into the atmosphere with a little added energy from the Sun through a process called evaporation. Snow and ice can also become water vapor through a process called sublimation. See also why do variations in generation time exist
How do we know that the
substance is not water?
Answers
What is the pH of a solution of KOH with a hydroxide concentration of [OH⁻] = 1.10 x 10⁻⁴
Answers
Answer:
\(p[H+] = 10.042\)
Explanation:
As we know that
\(pKw = pH + pOH\)......eq (1)
we will calculate the pH of OH- and then we will calculate the pH of H+
So p[OH-] \(= - log [1.10 * 10^{-4}]\)
Solving the right side of the equation, we get
p[OH-]
\(= - [-3.958]\\= 3.958\)
Now we know that
\(pKw = 14.0\)
Substituting the value of pOH in the above equation, we get -
\(14.0 = p[H+] + 3.958\\p[H+] = 14 - 3.958\\p[H+] = 10.042\)
what is the Charge of a neutral atom after 1 electron is taken away?
Answers
Answer:
+1
Explanation:
An atom is considered to be neutral before losing or gaining any electrons. They are neutral in charge because they initially have the same number of protons (with charge of +1 each) and electrons (with a charge of -1 each).
Consider charge in an electron like a balance, with positively charged protons on one side and negatively charged electrons on the other. When you have the same number of each, there is equal amounts of positive and negative charge so the atom is neutral with a charge of zero.
For example, potassium has 19 protons, and 19 electrons. This means it has 19 positive charges and 19 negative charges. If you take away one electron, it now has 19 positive charges and 18 negative charges. So there is one more positive charge than negative, which means it is now an ion (a charged atom) with a charge of +1.
A group of scientists in Alaska notices that not only have atmospheric CO2 levels increased at their sampling site but so too have methane levels. What could account for this increase in methane levels
Answers
Answer:
The release of methane from thawed permafrost.
Explanation:
The complete question is
A group of scientists in Alaska notices that not only have atmospheric CO2 levels increased at their sampling site but so too have methane levels. What could account for this increase in methane levels?
- None of the answer options is correct.
- The release of methane from thawed permafrost.
-A decrease in beef production near the researchers' sampling area.
-The melting of permafrost accompanied by the thawing of methane-producing bacteria.
-The failure of rice paddies to be established in Alaska, given its climate.
Permafrost regions like the arctic circle hold a large supply supply of methane in their soils and their seas. Ordinarily, this methane should be gradually released naturally over a long period of time, but the effects of global warming is making these permafrost to thaw at a much faster rate, accelerating the release of methane into the atmosphere. The dark side is that methane is about 80 times more deadly when compared to CO2 in its contribution to the green house effect on earth.
Which ionic compound forms a pH-neutral aqueous solution at 25 °C?
A. NaHCO3
B. LiClO4
C. LiF
D. NH4Cl
Answers
\(NaHCO_3\) (sodium bicarbonate) is the ionic compound that forms a \(pH^-\) neutral aqueous solution at 25°C.
Ions, which are formed when an atom (or group of atoms) acquires or loses electrons, are the charged particles that make up ionic compound. An ion with a positive charge is a cation, whereas one with a negative charge is an anion.Ionic compounds are frequently brittle, rigid, and have high melting and boiling temperatures. When dissolved in water, \(NaHCO_3\) dissociates into \(Na^+\)and \(HCO_3^-\) ions.The \(HCO_3^-\) ions react with water to form \(H^+\) and \(OH^-\) ions,thus maintaining a neutral pH. The other compounds listed (\(LiClO_4, LiF, and NH_4Cl\) ) are not pH neutral and would produce acidic or basic solutions when dissolved in water.
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Give one example of each of the following, that happens to us in our everyday life: Explain a bit about the science behind it, so for example, for melting you can say ice cream melting in your hand, which turns from a solid to a liquid, which is melting. If you are unsure please do not answer, though if you are confident please be free to do so! Have a wonderful day or night!
a) Melting:
b) Freezing:
c) Condensation:
d) Evaporation:
e) Sublimation.
Answers
a) Melting: An example of melting that occurs in our everyday life is when we heat butter on a stovetop.
b) Freezing: Freezing is the process in which a liquid transforms into a solid upon cooling.
c) Condensation: One example of condensation that we encounter regularly is when water droplets form on the surface of a cold drink on a hot day.
d) Evaporation: Evaporation is the process by which a liquid transforms into a gas or vapor.
e) Sublimation: Sublimation refers to the transformation of a substance directly from a solid to a gas without passing through the liquid state.
a) Melting: Butter is a solid at room temperature, but when heat is applied, it melts into a liquid. This change is a result of the increase in temperature, which provides enough energy to overcome the intermolecular forces holding the butter molecules together.
b) Freezing:Eventually, the temperature reaches the freezing point of water (0°C or 32°F), at which the water molecules slow down and arrange themselves into a regular, crystalline structure. This transformation from a liquid to a solid state is accompanied by the release of heat energy.
c) Condensation: As the temperature decreases, the air's capacity to hold moisture decreases, causing the water vapor in the air to condense into liquid water droplets. This process occurs due to the transfer of heat energy from the warm air to the cold surface, leading to the saturation of the air and the conversion of water vapor into liquid form.
d) Evaporation: As the sun's heat energy is absorbed by the water molecules on the clothes' surface, their kinetic energy increases, causing them to break free from the liquid phase and escape into the surrounding air as water vapor. This process occurs because the molecules at the liquid surface with sufficient energy can overcome the attractive forces within the liquid and enter the gas phase.
e) Sublimation: Sublimation refers to the transformation of a substance directly from a solid to a gas without passing through the liquid state. An example of sublimation is the process of dry ice (solid carbon dioxide) converting into carbon dioxide gas.
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Why would a thermometer be considered a speedometer for atoms? Explain with at least 2 sentences.
Answers
Apply to a gas molecule's kinetic energy is not the same as telling you the speed, so calling a thermometer a speedometer for atoms is deceptive.
Why would a thermometer be considered a speedometer for atoms?Uniformly, if a sample of water is put down in the freezer, its molecules begin to move slower (with a lower speed) and this is thought the back by a lower thermometer reading. It is in this feeling that a thermometer can be thought of as a speedometer. As John Rennie broaches in the comments, thermometers work for solids, liquids, and gasses, whereas the temperature is comparable to the average. A thermometer would be an average speedometer for the primary molecules of a substance or structure, not specifically separate atoms.
So we can conclude that thermometers compute the average velocity of atoms in a given material or order volume.
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how is a waves amplitude related to the amount of energy the wave carries?
Answers
Answer:
The energy transported by a wave is directly proportional to the square of the amplitude. So whatever change occurs in the amplitude, the square of that effect impacts the energy. This means that a doubling of the amplitude results in a quadrupling of the energy.
for each of the following ground-state atoms, predict the type of orbital (1s, 2p, 3d, 4f, etc.) from which an electron will be removed to form the 1 1 ion: (a) zn; (b) cl; (c) al; (d) cu.
Answers
Answer: (a) 4s, (b) 3p, (c) 3p, (d) 4s
Explanation:
The orbital from which an electron will be removed from will be the highest energy orbital in the valence shell. The valence shell for Zn and Cu is the 4th shell, and they only have electrons in the 4s orbitals, so removed electrons will come from their 4s orbital electrons. Cl and Al have the 3rd shell as their valence shell, and they both have electrons in 3p orbitals, which are the highest energy orbitals they have in the valence shell. Thus, removed electrons will come from their 3p orbital electrons.
Lawrence experienced a major accident in class. His entire test tube rack with all his chemicals fell and broke. There were chemicals all over the floor. Which would be used to clean his mess? eye wash safety shower sponge chemical spill kit
Answers
Answer:
The correct option is;
Chemical spill kit
Explanation:
When cleaning simple chemical spills that do not spread or indirectly put people and property in danger and does not negatively impact o the environment the risk, quantity and likely impact of the spill should be evaluated then with a chemical spill kit which comprises of personal protective clothing, materials that are absorbent, waste bags, broom and dustpan and a waste container can be used absorb, contain the residues, clean the spill and put the collected waste away.
Answer:
Chemical spill kit
Explanation:
uh yeah
A student is asked to standardize a solution of calcium hydroxide. he weighs out 0.990 g potassium hydrogen phthalate (khc8h4o4, treat this as a monoprotic acid). it requires 39.5 ml of calcium hydroxide to reach the endpoint. a. what is the molarity of the calcium hydroxide solution? m this calcium hydroxide solution is then used to titrate an unknown solution of hydroiodic acid. b. if 17.9 ml of the calcium hydroxide solution is required to neutralize 13.8 ml of hydroiodic acid, what is the molarity of the hydroiodic acid solution? m
Answers
The molarity of the calcium hydroxide solution is 0.0696 M
These are essentially 4-step problems.
1. Write and balance the equation. If we call potassium hydrogen phthalate just KHP, then
Ca(OH)2 + 2KHP ==> 2H2O + CaP + K2P
2. Convert grams to moles. moles KHP = 0.990/molar mass KHC8H4O4 = 0.990/179 = approximately 0.0055
3. Using the coefficients in the balanced equation, convert moles KHP to moles Ca(OH)2
0.0055moles KHP x (1 mole Ca(OH)2/2 moles KHP) = 0.0055 x (1/2) = 0.00275 moles Ca(OH)2.
4. M Ca(OH)2 = moles Ca(OH)2/L Ca(OH)2
M Ca(OH)2 = 0.00275/0.0395 = approximately 0.0696 M
Part B is done the same way. Now that you have the Ca(OH)2 standardized, use that, with the same process, to determine the molarity of the HI.
Remember that moles = M x L.
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Which of the following molecules has a bent shape?
Answers
Answer: CORRECT answer is A
Cl/S\Cl
Explanation:
A P EX
questionyou heat two substances, a and b. both substances change color. when cooled, both substances return to their original colors.what most likely happened in this situation?
Answers
Two substances, a and b were heated. Both substances change color. when cooled, both substances return to their original colors.
What is a physical change and examples?Changes within the size or form of matter are examples of physical change. Physical changes include transitions from one state to a different , like from solid to liquid or liquid to gas. Cutting, bending, dissolving, freezing, boiling, and melting are a number of the processes that create physical changes.
Why it's a physical change?Physical changes occur when objects or substances undergo a change that doesn't change their chemical composition. This contrasts with the concept of chemical process in which the composition of a substance changes or one or more substances combine or break up to form new substances.
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The element with the chemical symbol ______ is a nonmetal help me please
Answers
Answer:
O
Explanation:
O is in the red which says nonmetal
Which of the following pairs lists a substance that can neutralize HNO3 and the salt that would be produced from the reaction?
O BaOH2 and Ba(NO3)3
O KOH and K2NO3
O NH3 and NH4NO3
O NH4 and NHA(NO3)2
Answers
Answer:
NH3 and NH4NO3
Explanation:
I took the test and guessed this since I couldn't find it here, it turned out to be correct so I thought I'd share.
The substances that can react with HNO3 to neutralize it are NH3 and NH4NO3.
What is neutralization?The term neutralization has to do with the reaction between an acid and a base to yiled salt and water only.
The substances that can react with HNO3 must be basic substances hence the substances required are NH3 and NH4NO3.
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determine how much heat (in kj) of 2.89 mol of tio2(s)
Answers
Total heat generated by 2 mole of TiO2(s) is 4.963kJ.
The amount of heat released in the reaction of 2.89 mol of TiO2(s) can be calculated using the following equation: q = nCΔT, where n is the number of moles, C is the specific heat capacity of TiO2, and ΔT is the change in temperature.
The specific heat capacity of TiO2 is 683. 697. J/kgK. and the change in temperature is is 25k. By plugging in the values and converting J to kJ,
q = 2.89 * 25 * 683.697
=> 4963.35
In brief, the amount of heat released by 2.89 mol of TiO2(s) is 4.963kJ.
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Complete question :
determine how much heat (in kj) of 2.89 mol of tio2(s) with a temperature difference of 25k
Explain why the answer is correct and why the others aren’t.
Pleaseeee
Answers
Answer:
Buffalo and Watertown.
Explanation:
This is correct as the Interior lowlands are located ib the US. These are correct as the others are in the US but aren't located anywhere near the Interior Lowlands.
suppose you start with 0.94g of al metal and you collect 9.4g of alum. what is the percentage yield in this experiment?
Answers
To calculate the percentage yield in this experiment, we first need to understand what is happening. The reaction between aluminum metal and sulfuric acid produces aluminum sulfate, also known as alum. The balanced chemical equation for this reaction is:
2Al + 3H2SO4 → Al2(SO4)3 + 3H2
From this equation, we can see that 2 moles of aluminum produce 1 mole of aluminum sulfate. The molar mass of aluminum is 26.98 g/mol, and the molar mass of aluminum sulfate is 342.15 g/mol.
Using these values, we can calculate the theoretical yield of aluminum sulfate from 0.94 g of aluminum:
0.94 g Al x (1 mol Al / 26.98 g Al) x (1 mol Al2(SO4)3 / 2 mol Al) x (342.15 g Al2(SO4)3 / 1 mol Al2(SO4)3) = 6.38 g Al2(SO4)3
So the theoretical yield of alum is 6.38 g. However, the actual yield in the experiment was 9.4 g. To calculate the percentage yield, we use the formula:
% yield = (actual yield / theoretical yield) x 100
% yield = (9.4 g / 6.38 g) x 100 = 146.9%
The percentage yield is greater than 100%, which is not possible in theory. This could be due to experimental error or impurities in the reactants. It is important to consider all factors when interpreting experimental data.
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The first step in calculating the percentage yield is to determine the theoretical yield, which is the maximum amount of product that can be obtained based on the amount of reactants used. In this case, the reaction between aluminum metal and sulfuric acid to produce alum is a 1:1 molar ratio, meaning that the theoretical yield of alum is 0.94g.
Next, we can calculate the actual yield, which is the amount of product obtained in the experiment. Here, we collected 9.4g of alum.
Finally, we can use the formula for percentage yield: actual yield/theoretical yield x 100%. Plugging in the values we have, we get:
9.4g/0.94g x 100% = 1000%
This means that the percentage yield is greater than 100%, which could be due to experimental errors such as impurities in the reactants or incomplete reaction. It is important to note that a percentage yield greater than 100% is not physically possible, so it is likely that some error occurred in the experiment.
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You make an experiment to determine the percent mass of carbon in sugar. You find out that there is 46.63g of carbon in 75.00g of sugar. What is the percent mass of carbon?
Answers
Taking into account the definition of percentage composition, the percent composition of carbon in this sample is 62.17%.
Percentage compositionThe Percentage Composition is a measure of the amount of mass that an element occupies in a compound and indicates the percentage by mass of each element that is part of a compound.
Then, the percentage by mass expresses the concentration and indicates the amount of mass of solute present in 100 grams of solution.
In other words, the percentage by mass of a component of the solution is defined as the ratio of the mass of the solute to the mass of the solution, expressed as a percentage.
The percentage by mass is calculated as the mass of the solute divided by the mass of the solution, the result of which is multiplied by 100 to give a percentage. This is:
\(percentageby mass= \frac{mass of solute}{mass of solution}x100\)
This caseIn this case, you know:
mass of solute= 46.63 gmass of solution= 75 gReplacing:
\(percentageby mass= \frac{46.63 g}{75 g}x100\)
Solving:
percentage by mass= 62.17 %
Finally, the percent composition of carbon in this sample is 62.17%.
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