Indicator compounds are substances that change color in light of changes in pH. They are utilized to decide the acidity or basicity of a solution.
Similarities:
All indicators change color in light of changes in pH, demonstrating the presence of an acidic or basic solution.
The color change of most indicators is slow, taking into consideration the constant measurement of pH over a range of values.
Most indicators have an alternate color at the pH at which they are neutral (neither acidic nor basic) and at the pH values that are either acidic or basic.
Differences:
The range of pH over which an indicator changes color can differ. A few indicators might change color over an exceptionally limited range of pH values, while others might change color over a more extensive range.
The specific colors that an indicator exhibits at different pH values can also vary. Some indicators may show several different colors over their range of pH, while others may only show two or three different colors.
The responsiveness of an indicator can likewise shift. A few indicators might display a more perceptible color change at a given pH, while others might have a less articulated change.
In conclusion, while all indicators change color because of changes in pH, the particular range of pH over which they change color, the particular colors they display, and the awareness of their color change can fluctuate between various indicator compounds.
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What is the limiting reactant and how much excess reactant is leftover of:
4H2O+7CO2---> C7H8+9O2
starting with
50gH2O
250gCO2
Answer:
The limiting reactant is the reactant that is completely consumed before the other reactant(s) in a chemical reaction. To find the limiting reactant, we need to find how much product is formed from each reactant, and then compare which reactant forms the least amount of product.
The balanced equation for the reaction is 4H2O+7CO2---> C7H8+9O2
From the given data, we have 50g of H2O and 250g of CO2.
We can calculate the limiting reactant by using the stoichiometry of the equation.
The stoichiometry is the relationship between the amount of reactants and products in a balanced chemical equation.
From the balanced equation, we know that 4 moles of H2O and 7 moles of CO2 are needed to produce 1 mole of C7H8 and 9 moles of O2.
From the data we have, 50g of H2O is equivalent to 2.86 moles H2O.
And 250g of CO2 is equivalent to 5.36 moles of CO2.
Now, using the balanced equation, we can calculate the amount of product that forms from each reactant:
From 2.86 moles of H2O: 2.86 moles H2O * (1 mole C7H8 / 4 moles H2O) = 0.715 moles C7H8
From 5.36 moles of CO2: 5.36 moles CO2 * (1 mole C7H8 / 7 moles CO2) = 0.766 moles C7H8
As we can see, the CO2 is the limiting reactant because it forms less product than H2O.
The amount of excess reactant is the amount of the reactant that is not used up in the reaction, we can calculate this by subtracting the amount of product that forms from the limiting reactant from the initial amount of the reactant.
Excess reactant of H2O is 50g - (0.715 moles * 18.02g/mol) = 37.5g
Excess reactant of CO2 is 250g - (0.766 moles * 44.01g/mol) = 191g
So, the limiting reactant is CO2 and there is 191g of excess CO2 leftover.
Explanation: In a chemical reaction, the limiting reactant is the reactant that is completely consumed before the other reactant(s) run out. The limiting reactant determines the maximum amount of product that can be formed.
To determine the limiting reactant, we need to calculate the number of moles of each reactant present.
The moles of H2O: 50g/18g/mol = 2.778 moles
The moles of CO2: 250g/44g/mol = 5.68 moles
Next, we can use the coefficients in the balanced chemical equation to find the number of moles of each reactant required to react with each other.
The number of moles of H2O required: 4 moles H2O / 4 moles H2O/1 mole C7H8 = 1 mole C7H8
The number of moles of CO2 required: 7 moles CO2 / 1 mole C7H8 = 7 moles CO2
From the above we can see that H2O is the limiting reactant since it is consumed before the CO2.
To calculate the excess reactant, we subtract the number of moles of the limiting reactant from the number of moles of the other reactant.
The excess moles of CO2 = 5.68 moles - 1 mole = 4.68 moles
The excess moles of H2O = 0 moles (since H2O is limiting reactant)
The mass of the excess CO2 = 4.68 moles x 44 g/mol = 205.12 g
So, CO2 is the excess reactant and 205.12 g of CO2 is leftover.
The addition of an oxidizing agent such as chlorine water to a clear solution of an unknown compound results in the appearance of a brown color. When this solution is shaken with the organic solvent, methylene dichloride, the organic solvent layer turns purple. The unknown compound probably contains:
Answer:
The unknown compound probably contains a chromophore, which is a structural element that causes a compound to have a specific color. The addition of an oxidizing agent such as chlorine water causes the appearance of a brown color, indicating that the compound contains an electron-rich chromophore. The fact that the organic solvent layer turns purple when the solution is shaken with methylene dichloride suggests that the compound also contains a chromophile, which is a structural element that can form a complex with an electron deficient species like the dichloromethane solvent. The compound probably contains a conjugated system of double bonds, which can act as both chromophore and chromophile, and that is why the color changed from brown to purple after shaking with the organic solvent.
The diagram below shows a person holding a ball standing at three different places on earth. if the person drops the ball, gravity will make it fall.
If the person drops the ball, its velocity gets bigger and bigger as it falls.
What effect does gravity have on a falling ball?
When something falls, it is due to gravity. Because the item feels a force, it accelerates, causing its velocity to increase as it falls. A sort of acceleration is the force with which the Earth pushes on something in the form of gravity. The Earth exerts the same amount of force on everything.
Gravity is the force that causes objects to fall to the ground. When you drop a ball (or anything else), it falls to the ground. Everything falls at the same rate due to gravity. When you drop the ball, gravity pulls it down and accelerates it. It collides with the ground and squashes at contact. As the squished ball recovers its former shape
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Complete question:
The diagram below shows a person holding a ball standing at three different places on earth. if the person drops the ball, gravity will make it fall.
Which of the following diagrams best shows the direction the dropped ball will fall at the three different positions?
b. b
a. a
c. c
d. d
Which of the following quantities will always be the same before and after a chemical reaction?
The total number of neutrons of each element
The total mass of all substances
The total number of atoms of each element
The total mass of each substance
The total mass of each element
The total number of electrons of each element
The total number of molecules
The total number of neutrons
The total number of electrons
The total volume occupied by each element
The total number of protons
The total number of atoms
The total number of protons of each element
The total volume occupied by all substances
Answer:
The total mass of all substances and the total number of atoms of each element will always be the same before and after a chemical reaction, this is based on the Law of Conservation of Mass and the Law of Conservation of atoms. This law states that in any chemical reaction, the total mass of the reactants is equal to the total mass of the products and the number of atoms of each element is conserved.
two or more substances in variable proportions, where the composition is same trough out (constant) throughout are
Two or more substances in variable proportions, where the composition is constant throughout, are known as homogeneous mixtures.
A homogeneous mixture is a mixture where the composition is uniform throughout and the components of the mixture are not visually distinguishable. Examples of homogeneous mixtures include solutions, suspensions, and colloids.
Colloids are homogeneous mixtures of two or more substances in which the particles of one substance are dispersed evenly throughout the particles of the other. The particles in a colloid are usually intermediate in size between those of a solution and those of a suspension, and they do not settle out. Examples of colloids include milk, fog, and paint.
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A farmer applies 1305 kg of a fertilizer that contains 10.0% nitrogen to his fields each year. Fifteen percent (15.0%) of the fertilizer washes into a river that runs through the farm.
If the river flows at an average rate of 0.370 cubic feet per second, what is the additional concentration of nitrogen (expressed in milligrams of nitrogen per liter) in the river water due to the farmer's fertilizer each year?
Answer:
0.139
Explanation:
Name each compound.
A. A six carbon ring with alternating double bonds contains a CH2 CH3 group at carbon 1 and carbon 3. compound A name:
B. A six carbon ring with alternating double bonds contains a Cl atom at carbons 1, 2, and 4. compound B name:
C. A six carbon ring with alternating double bonds contains an O
The name of each compound is:
Compound A is a chloromethane molecule, also known as methyl chloride [tex](CH_{2} Cl)[/tex]. Compound B is a chloroform molecule, also known as trichloromethane [tex](CHCl_{3})[/tex]. Compound C is an ether molecule, specifically an ethoxyethane [tex](C_{2}H_{5}OC_{2}H_{5})[/tex].An ether molecule consists of two hydrocarbon groups connected by an oxygen atom. This type of molecule is an organic compound which is characterized by its low boiling and melting points, and its low solubility in water. Ether molecules are widely used in organic synthesis and as solvents.
These molecules are highly flammable and can be explosive when mixed with air. They are also highly volatile, meaning that they can easily evaporate into the atmosphere and can be difficult to contain. Because of these properties, ether molecules are often used as a fuel in small engines and rockets.
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The pressure of a gas sample was measured to be 854 mmHg. What is the pressure in kPa? (
1 kPa is equal to 0.145038 PSI. Pascal or kilopascal, as well as in many other units including torr, atmosphere, and bar.
What unit of measurement defines gas pressure?A gas’s pressure can be represented in the SI units of pascal or kilopascal, as well as many other units such as torr, atmosphere, and bar. A barometer is used to measure atmospheric pressure; other gas pressures can be measured with one of various types of manometers.
Millimeters of mercury (mm Hg) is the most often used pressure unit. Pressure is commonly measured in atmospheres. One atmosphere of pressure (atm) is equal to 760 millimeters of mercury (mm Hg). Pressure is represented in SI in derived units called pascals. At a temperature of 60 degrees Fahrenheit and an atmospheric pressure of 14.7 pounds per square inch, gas is frequently measured in cubic feet. Production of natural gas
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determine the solubility of following samples in water by adding a few milligrams to about 10ml of water. Record your observations in a tabular form
Each functional group has a particular set of chemical properties that it to be identified.
What is meant by determination of solubility ?The maximum amount of solute that can dissolve in a known quantity of solvent at a certain temperature is its solubility.
The solubility of the compound is determined as the concentration of unionized compound in solution when the measured pH slope is interpolated to zero.
These properties can be demonstrated by observing solubility behavior, while others can be in chemical reactions that are accompanied by color changes, precipitation formation, or other visible affects.
According to the presence of their functional group, organic compounds can be classified in different families and class.
The types of compounds soluble in a particular solvent are summarized on the following:
Water Soluble Compounds
5% Sodium Hydroxide Soluble Compounds
5% Sodium Bicarbonate Soluble Compounds
5% Hydrochloric Acid Soluble Compounds
96% Sulfuric Acid Soluble Compounds
Solubility of Amphoteric Compounds
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Briefly explain what solubility is, and list some of the factors that affect solubility.
3. Does a polar compound dissolve in water? If so, explain how it occurs.
4. Does a non-polar compound dissolve in water? If not, explain why it does not dissolve.
At a given temperature, solubility is the maximum amount of a substance that will dissolve in a given amount of solvent. Temperature and pressure are two direct factors that influence solubility. Temperature influences the solubility of both solids and gases, whereas pressure influences only the solubility of gases.
What are polar compound ?Polar molecules primarily attract water molecules via hydrogen bonding. They successfully compete with hydrogen bonds between water molecules, making them easily soluble in water.
Because nonpolar molecules lack regions of partial positive or partial negative charge, they are not electrostatically attracted to water molecules. When nonpolar substances are added to water, they remain separate and form layers or droplets rather than dissolving.
Thus, If molecules are non-polar, this means there are no dipoles or entire charges on the atoms in the compound.
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A piece of cardboard is 12.0 cm long, 6.3 cm wide and 0.75 millimeters thick. What is the volume of this piece of cardboard in cubic meters
Answer:
5.67 cm^2
Explanation:
In the Photosynthesis Lab part of the OMS lesson, you changed the amount of light intensity, temperature, and CO2 level.
Below is a graph showing data collected of the oxygen flow at different amounts of light intensity.
According to this graph, what percent of light intensity would the rate of photosynthesis be the greatest?
(A)11%
(B)38%
(C)21%
(D)30%
Photosynthesis will be greatest at 30% light intensity according to the graph.
How does light intensity affect photosynthesis?Light intensity affects photosynthesis by providing the energy needed for the process to occur. At low light intensities, photosynthesis proceeds at a slower rate, while at higher light intensities, photosynthesis proceeds at a faster rate. At 30% increase, rate of photosynthesis will increase.
However, if the light intensity is too high, it can damage or kill the plant, as it can cause the temperature inside the leaf to rise, leading to thermal stress. This can lead to a decrease in the rate of photosynthesis, or even a complete cessation of the process.
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0.590 m aqueous solution freezes at -2.90 °C, what is the van't Hoff factor
The freezing point depression of an aqueous solution is directly proportional to the concentration of solute particles. This relationship is described by the equation:
ΔTf = Kf x molality
where ΔTf is the change in freezing point, Kf is the freezing point depression constant for water, and molality is the concentration of solute particles in the solution.
The Van't Hoff factor (i) is the ratio of the number of solute particles in a solution to the number of solute particles in an ideal solution. In this case, the Van't Hoff factor can be calculated using the freezing point depression:
i = (ΔTf / (Kf x molality)) + 1
Given that the freezing point of the solution is -2.90 °C, the freezing point depression constant for water is 1.86 °C/m, and the molality of the solution is (mass of solute / mass of solvent) = (0.590 g / 1000 g) = 0.00059 m, we can calculate the Van't Hoff factor as:
i = (-2.90 / (1.86 x 0.00059)) + 1
i = 3
So, the Van't Hoff factor for this solution is 3, which means that for each solute particle in the solution, there are 3 solute particles in an ideal solution.
PLEASE HELP MY TEACHER SAID I NEED TO SHOW MY WORK I WILL GIVE YOU AS MANY POINTS AS I POSSIBLY CAN MY TEST IS TOMORROW MORNING HELP ME. THIS IS GAS LAWS CHEMISTRY 10TH GRADE LEVEL HONORS.
The volume of the gas at 40 degrees C, given that it's volume was 60 L at 301.5 K is 62.3 L
How do I determine the volume at 40 degrees C?From the question given above, the following data were obtained:
Initial volume (V₁) = 60 LitersInitial temperature (T₁) = 301.5 KNew temperature (T₂) = 40 degree C = 40 + 273 = 313 KNew volume (V₂) =?Using Charles' law equation, we can obtain the volume of the gas at 40 degrees C as illustrated below:
V₁ / T₁ = V₂ / T₂
60 / 301.5 = V₂ / 313
Cross multiply
301.5 × V₂ = 60 × 313
301.5 × V₂ = 18780
Divide both side by 301.5
V₂ = 18780 / 301.5
V₂ = 62.3 L
Thus, we can conclude from the above calculation that the new volume of the gas is 62.3 L
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The new volume of the gas is 62.3 L.
What is the volume of the gas?We have to use the Charles law here. In this law, the volume of a gas is directly proportional to its temperature (in kelvins), provided that the pressure and number of moles of the gas remain constant. It can be expressed as: V/T = k, where V is the volume, T is the temperature in kelvins, and k is a constant.
We have that;
V1/T1 = V2/T2
V1 = initial volume]
V2 = final volume
T1 = initial temperature
T2 = final temperature
Then;
V1T2 = V2T1
V 2 = V1T2 /T1
V2 = 60 * 313/301.5
V2 = 62.3 L
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Is the following compound aromatic, non-aromatic, or anti-aromatic?
Answer:
Non-aromatic
Explanation:
The compound clearly is not cyclic, thus can not be considered amongst compounds that are aromatic or semi-aromatic.
Hence, it should be non-aromatic.
For the following reactions, calculate the ionization constant of each reaction. HCl (aq) + H2O (l) equation H3O+ (aq) + Cl- (aq); [HCl] = 16.9M, [H3O+] = 13.3M, [Cl-] = 7.4MKa =
The ionization constant for the given chemical equation is 5.82 as shown in the calculations.
What is chemical equation?Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.
A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .
Ionization constant is given as , [H₃O[tex]^+[/tex]][Cl[tex]^-[/tex]]/[HCl]=[13.3][7.4]/[16.9]=5.82
Thus, the The ionization constant for the given chemical equation is 5.82 .
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Red gold is a gold‑copper alloy used to make jewelry. A piece of jewelry made of red gold weighs 7.74 g and has a volume of 0.553 cm3. Gold has a density of 19.3 g/cm3 and copper has a density of 8.96 g/cm3. Calculate the percentage by mass of each metal in the jewelry. Assume the total volume of the jewelry is the sum of the volumes of the two metals it contains.
Pure gold is defined as having 24 carats. When mixed in an alloy, the carats of gold are given as a percentage of this value. For example, a piece of jewelry made with 50% gold has 12 carats. State the purity of this piece of red gold jewelry in carats.
The percentage by mass of each metal in the jewelry is given as :
The percentage by mass of gold is : (mass of gold / total mass of jewelry) x 100% = (10.65 g / 7.74 g) x 100% = 137.5%
and the percentage by mass of copper is : (mass of copper / total mass of jewelry) x 100% = (4.91 g / 7.74 g) x 100% = 63.5%
Question 2
The piece of red gold jewelry has a purity of : (137.5%) x 24 = 33 carats
What is meant by percentage by mass?percentage by mass is described as a way of expressing a concentration or describing the component in a particular mixture.
We know that the piece of red gold jewelry contains 137.5% gold and 63.5% copper by mass.
To calculate the carats, we will use the formula:
carats = (percentage of gold in alloy) x 24
Therefor, the piece of red gold jewelry has a purity of : (137.5%) x 24 = 33 carats.
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question 3. calculate evapotranspiration using the watershed water balance equation (35 points). g
We can calculate evapotranspiration by using the formula, ET=P-R-TWSC, where P is precipitation, R is runoff and TWSC is change in terrestrial water change.
Evapotranspiration is defined as water evaporation into the atmosphere from the soil surface, evaporation from the capillary fringe of the groundwater table, and evaporation from water bodies on land. Generally, evapotranspiration also includes transpiration, which is the water movement from the soil to the atmosphere through plants.
When we want to estimate the ET (evapotranspiration) using the water balance method: ET=P-R-TWSC, where P is precipitation, R is runoff and TWSC is change in terrestrial water change.
This question is incomplete so I have answered on general basis.
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Which of the following statements about subatomic particles are true? I. Protons and neutrons have charges of opposite signs but the same magnitude, II. Protons and neutrons have about the same mass. III. A neutral atom always has the same number of neutrons and electrons.
A. I only
B. II only
C. III only
D. II AND III
E. I AND II
III. A neutral atom always has the same number of neutrons and electrons.[TRUE]
ABOUT ATOMOne of the particles that make up the atomic nucleus is the neutron. The atom itself is a basic unit of matter consisting of an atomic nucleus and an electron cloud. Electrons are the part of the atom that is negatively charged.
While the part of the atom that is positively charged is the proton. One of the particles that make up the atomic nucleus is the proton. Protons aren't the only particles that make up the atomic nucleus. In addition to protons, the particles that make up the atomic nucleus are neutrons which are neutral.
In other words, the particles that make up the atomic nucleus are protons and neutrons. However, not every atom has a neutron particle as one of the particles that make it up. Hydrogen-1 atomic nucleus, no neutrons in it.
From this explanation it can be seen that the atom is a material composed of electrons and atomic nuclei. While the particles that make up the atomic nucleus are protons and neutrons.
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be able to recall what functional groups are on the side chains of the various amino acids and from there predict the properties of the side chain.
The alcohols, amides, and thiols are usually the functional groups of side chains. These are acidic or basic amino acids. The side chains contain heteroatoms that are capable of forming permanent dipoles within the R-group
The naturally-occurring amino acids contain an e alpha-carbon, an amino, carboxylic acid, and an R group. The R group side chains may be either nonpolar, polar and uncharged, or charged, depending on the functional group, the pH.
Others contain polar uncharged functional groups such as alcohols, amides, and thiols. A few amino acids are basic or acidic (carboxylic acid functional groups).
The side chains contain heteroatoms (O, S, or N) that are capable of forming permanent dipoles within the R-group.
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rank the following compounds in order of increasing acidity (least to most acidic) using the periodic table. start with the least acidic compound at the top of the list. h2s sih4 ph3
The following compounds should be ranked in order of increasing acidity, starting with the least acidic compound at the top: SiH4, H2S, PH3.
Analysis of each compound:SiH4 is the least acidic compound, as it is a covalent hydride that is unlikely to produce a hydrogen ion in water. H2S is more acidic than SiH4, as it is a molecular hydride that can form hydrogen ions when dissolved in water. PH3 is the most acidic compound, as it is a molecular hydride with a high degree of polarity, which allows it to easily donate a hydrogen ion when dissolved in water.Learn more about acidity compounds:
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Aqueous lead (II) nitrate, Pb(NO3)2 undergoes a double displacement reaction with aqueous sodium chloride, NaCl, in which a precipitate forms. If the precipitate contains lead, write the balanced chemical equation for this reaction. Be sure to include the states of each of the reactants and products.
Answer:
Pb(NO₃)₂(aq) + 2NaCl(aq) → PbCl₂(s)↓ + 2NaNO₃(aq)
Explanation:
The precipitate formed is PbCl₂, which contains lead in it
∴ Pb(NO₃)₂(aq) + 2NaCl(aq) → PbCl₂(s)↓ + 2NaNO₃(aq)
X-rays from a copper X-ray tube (λ = 1.54 Å) were diffracted at a scattering angle of 14.22° by a crystal of silicon. Assuming first-order diffraction (n = 1), what is the interplanar spacing in silicon in Å? (1 Å = 10⁻¹⁰ m)
This is what am i working on, but the answer came out is not correct.
What am i mixing in this problem?
Answer:
313.52 pm
Explanation:
Perhaps you should check your working:
[tex]\frac{1 * 154}{2 * 0.2456}[/tex]
≈ 313.52
(I have used a calculator lol, my arithmetic skills are terrible when I am not dealing with numbers in scientific notations)
Hope this helps :)
which situation is in equilibrium
Answer: A) The amount of air in a room never changes.
What is equilibrium?It is a state of balance between opposing forces or actions that is either static (as in a body acted on by forces whose resultant is zero) or dynamic (as in a reversible chemical reaction when the rates of reaction in both directions are equal).
Economic equilibrium is a condition or state in which economic forces are balanced. In effect, economic variables remain unchanged from their equilibrium values in the absence of external influences.
a) The amount of air in a room never changes: the amount of air does not change as the amount of air leaving the room is same as that of the air entering the room and hence the reaction is in equilibrium.
b) The amount of water in a cup decreases as it evaporates: The amount of water is decreasing that means the reaction is taking place in one direction and hence the reaction is not in equilibrium.
c) The percentage of nitrogen gas in a room decreases steadily: the amount decreases that means the reaction is taking place in one direction and hence the reaction is not in equilibrium.
d) A blade of grass grows taller : the plant gets taller that means the reaction is taking place in one direction and hence the reaction is not in equilibrium
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PLS HELPPP ITS DUE VRY SOON
In a molecule or covalent bonding, elements having Octet electrons to obtain the stability with eight electrons.
One element that does not follow the octet rule is hydrogen. For stability only require stable electrons.
A molecule can present covalent bond but can be chemical.
What is a covalent bond?Covalent bonding is a type of chemical bonding that occurs when two or more atoms share electrons in order to form a strong bond between them. This type of bond is formed when atoms share electrons in a way that gives each atom a full outer shell of electrons, known as the octet rule. This means that all atoms in the bond must have a total of eight electrons in their outermost shell. The atoms involved in a covalent bond form a molecule, which is held together by the shared electrons.
The octet rule is a guideline that states that atoms will bond in a way that allows them to have a full outer shell of electrons. This means that they must share electrons in order to reach a total of eight electrons in their outermost shell. The sharing of electrons creates a strong bond between the atoms that form a molecule. The sharing of electrons also results in the creation of a covalent bond.
However, not all elements follow the octet rule. For example, hydrogen only requires two electrons to reach a stable state, so it does not need to share electrons in order to reach the octet rule. Therefore, a hydrogen molecule will not have a covalent bond.
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a candle is lit with a match and places in a glass jar. classify the observations as physical or chemical changes:
-the candle wax melts
-the candle wick burns
-the glass jar gets hot
-soot is deposited on the inside of the ja
The melting of the candle wax and the burning of the candle wick are physical changes, as the molecules of the wax and wick have been rearranged and heated but their chemical composition has not changed.
The glass jar getting hot and the soot being deposited on the inside of the jar are both chemical changes, as the molecules of the glass and the soot have been chemically altered.
Chemical changes occur when a substance undergoes a chemical reaction, resulting in the formation of new substances.
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The speed of light is 2.998*10^8 . How far does light travel in 5.0µs?Set the math up. But don't do any of it. Just leave your answer as a math expression. Also, be sure your answer includes all the correct unit symbols.
Answer:
d = (2.998 x 10^8 m/s) * (5.0 x 10^-6 s)
Explanation:
calculate the inital tempature of 20 grams of pure carbon graphite was added to 60 grams of pute water at 20°c in a calorimiter the final tempature wss found to be 24°c the sorcific heay capacity of carbon graphite is .709j/g°c and that of water is 4.18j/g°c assume constant pressure and no added heat loss to the calorimiter nor surroundings
Answer:
The initial temperature of the carbon graphite before it was added to the water was 31.69°C.
Explanation:
To calculate the initial temperature, we need to use the formula for heat:
Heat = Specific heat capacity x mass x change in temperature
The heat absorbed by the water is:
Heat absorbed by water = 4.18 J/g°C x 60 g x (24°C - 20°C) = 10,212.8 J
The heat absorbed by the carbon graphite is:
Heat absorbed by carbon graphite = 0.709 J/g°C x 20 g x (Tinitial - 20°C) = 1418.Tinitial - 28360
Since heat is conserved, the heat absorbed by the carbon graphite is equal to the heat absorbed by the water:
1418.Tinitial - 28360 = 10,212.8 J
Tinitial = (10,212.8 + 28360) / 1418 = 31.69°C
The initial temperature of the carbon graphite before it was added to the water was 31.69°C.
a 12.6g piece of metal is heated at 287 degrees celcius and dropped into 86.0g of water at 26.0 degrees celcius. the metal and water come to the same temperature at 57.7 degrees celcius. what is the specific heat of the metal?
A 12.6g piece of metal is heated at 287 degrees Celsius and dropped into 86.0g of water at 26.0 degrees celcius. the metal and water come to the same temperature at 57.7 degrees celcius. Therefore, the specific heat of the metal is 0.43J/gK.
What is specific heat?
The quantity of heat energy needed to increase a substance's temperature per unit of mass is known as specific heat capacity. A material's specific heat capacity is a physical characteristic.
Because its value is inversely correlated with the magnitude of the system under study, it is also an illustration of an extended feature.
Heat lost by the metal = Heat gained by the water and colorimeter system
mCΔT=(M+m)CT
12.6g ×C×110=(150+25)×4.186×13
C=(175×4.186×13)/(110×200)=0.43J/gK
Therefore, the specific heat of the metal is 0.43J/gK.
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From the given Lewis structure and what you know about VSEPR theory, identify the shape of the molecule.
trigonal pyramidal
see-saw
linear
bent
tetrahedral
trigonal planar
trigonal bipyramidal
square planar
square pyramidal
T-shaped
octahedral
Explanation:
square pyramidal
T-shaped
octahedral
