How would you measure the melting point of a solid that melts above 100.
Answers
Answer:
The determination of melting point can be done using the capillary tube method. ... A small capillary tube is filled with a small amount of the chemical component. The capillary is then heated in a chemical bath along with the thermometer to observe the point of melting of the solid component.Electrically heated apparatus is used to measure the melting point of a solid that melts above 100 degrees Celsius. This apparatus can also be used for even higher melting points.
Explanation:
The melting point of a solid that melts above 100 can be determined by using capillary tube method.
Capillary tube method:The assurance of dissolving point should be possible by utilizing the slim cylinder technique. A little fine cylinder is loaded up with a modest quantity of the synthetic part. The slender is then warmed in a substance shower alongside the thermometer to notice the reason behind liquefying of the strong part. An electrically warmed contraption is utilized to gauge the liquefying point of a solid that melts over 100 degrees Celsius. This mechanical assembly can likewise be utilized for considerably higher softening places.
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Related Questions
Acid rain may have 355 ppm of dissolved carbon dioxide, which contributes to its acidity. Calculate the molar concentration of carbon dioxide in a 4.26L sample of acid rain
Answers
The molar concentration of CO2 in a 4.26 L sample of acid rain is 0.0081 mol/L.Acid rain is caused by air pollution.
The molar concentration of carbon dioxide in a 4.26L sample of acid rain is calculated as follows:First, we will calculate the number of moles of carbon dioxide in the sample. The formula to calculate the number of moles is:Number of moles = mass of the substance/molar mass of the substanceThe molar mass of CO2 is 44.01 g/mol. 355 ppm means 355 parts per million, which is equivalent to 355 mg/L.To calculate the mass of carbon dioxide in 4.26 L of acid rain:Mass of CO2 = Volume × ConcentrationMass of CO2 = 4.26 L × 355 mg/L = 1510.3 mg = 1.51 gTherefore, the number of moles of CO2 in the sample is:Number of moles of CO2 = Mass of CO2/Molar mass of CO2 = 1.51 g/44.01 g/mol = 0.0344 molTo calculate the molar concentration of CO2:Molar concentration of CO2 = Number of moles of CO2/Volume of solution in litersMolar concentration of CO2 = 0.0344 mol/4.26 L = 0.0081 mol/L, When sulfur dioxide and nitrogen oxide pollutants combine with atmospheric moisture, they form acidic compounds that can travel long distances and fall as acid rain. Acid rain can damage forests, kill fish in streams, and corrode buildings and monuments, among other things.
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what are the factors affecting gravity?
Answers
Gravity, as a fundamental force of nature, is influenced by several factors. The following are some of the key factors affecting gravity:
Mass: The most significant factor affecting gravity is the mass of the objects involved. According to Newton's law of universal gravitation, the gravitational force between two objects is directly proportional to the product of their masses. Greater mass leads to a stronger gravitational force.Distance: The distance between two objects also plays a crucial role in the strength of gravity. According to the inverse square law, the gravitational force decreases as the distance between objects increases. As objects move farther apart, the gravitational attraction between them weakens.Gravitational Constant: The gravitational constant, denoted by G, is a fundamental constant in physics that determines the strength of the gravitational force. It is a universal constant and does not change, affecting the overall magnitude of gravity.Shape and Distribution of Mass: The distribution of mass within an object can influence the gravitational field it generates. Objects with a more compact and concentrated mass distribution will have a stronger gravitational pull compared to those with a more spread-out mass distribution.External Influences: Gravity can be influenced by external factors such as nearby celestial bodies or the presence of other forces. For example, the gravitational interaction between the Earth and the Moon affects tides on Earth's surface.please help quickly
Rubia was given a type of inclined plane called a ramp in her science class. Her teacher told her that the ramp should have a mechanical advantage of 3.
Rubia pulled a block up the ramp, but afterward she calculated that the mechanical advantage of the ramp was 2.8 instead of 3. Her teacher said she did not make a mistake. What did Rubia calculate?
A.
the actual operating power of the ramp
B.
the actual mechanical advantage of the ramp
C.
the ideal mechanical advantage of the ramp
D.
the ideal operating power of the ramp
Answers
Answer: B. The actual mechanical advantage of the ramp.
Explanation:
The professor saying that the ramp SHOULD have a mechanical advantage of 3 indicates that that would be the ideal mechanical advantage. Since Rubia calculated it to be 2.8, that means that it is the acutal mechanical advantage. The actual advantage will be reduced from the ieal due to things like friction.
Today, the atom is defined as the_____ particle that can still be considered an____.
Answers
Answer:
Today, the atom is defined as the smallest particle that can be considered an element.
Explanation:
Answer:
Today,the atom is defined as the smallest particle that can still be considered an element.
Physiological pH of blood (7.4) is maintained by the bicarbonate ion/carbonic acid equilibrium (see reactions below)-
HCO3- +H3O+ ---> H2CO3 +H2O
H2CO3 --> CO2 +H2O
a. excessive physical exertion can lead to acidosis of blood. Assume that the blood pH has dropped to 7.31. What is the ratio of bicarbonate to the carbonic acid in the blood? (pKa of carbonic acid is 6.37)
b. how can the human body possibly respond to this acidosis?
Answers
The HCO3⁻ acts as a base and removes excess H⁺ by the formation of H₂CO₃.
Dissociation of carbonic acid: H₂CO₃(aq) ⇄ HCO₃⁻(aq) + H⁺(aq).
Adding acid: HCO₃⁻(aq) + H⁺(aq ⇄ H₂CO₃(aq).
pH of a solution is defined as the hydrogen ion concentration present in that solution. A buffer solution is defined as a substance which prevents the change in pH of a solution by either absorbing or releasing the H⁺ ion present in a solution.
A buffer solution can resist the pH change which may generally take place upon the addition of even a small amount of acidic or basic components. It is able to neutralize small amounts of acid or base added to the solution, which makes the pH of the solution relatively stable.
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If you want to change the mass of your atom by 1 or more mass units, you can ether
(2 RIGHT CHOICES)
add a proton
add a neutron
add an electron
Answers
If you want to change the mass of your atom by 1 or more mass units, you can either? Add a proton and Add a neutron.
Explanation:
Option A and Option B is your answers.
To change the mass of your atom by more mass units ; you can add a proton or add a neutron ( A and B )
The nucleus of an atom is composed of a neutron and a proton while the outer shell of an atom comprises of the electrons.
The mass of an atom is dependent on the mass of the nucleus of the atom therefore to increase the mass of the atom by any number of mass units you can either add a proton or a neutron to the nucleus of the cell.
Hence we can conclude that to change the mass of your atom you can add a proton or add a neutron to the nucleus of the atom
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How is calculating a weighted average
different than calculating a non-weighted
average (like a mean average)?
Answers
Answer:
The Key difference between average vs weighted average is that simple average is nothing but simply adding up all the observation values and dividing the same by the total number of observations to calculate the average whereas weighted average is an average where each observation value will have a frequency assigned.
Explanation:
The weighted average involve the frequency of scores while the non-weighted average do not include the frequency of scores.
To calculate a non-weighted average such as a mean average, all we need to do is to sum up the scores and divide this sum by the number of scores. For a weighted average, each score must have a frequency attached to it. This frequency is called specific weight.
While the non-weighted average such as a mean average is a measure of central tendency, the weighted average tends to be biased towards the scores that have the largest frequency.
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5. Base your answer to the following question on the informationbelow and on your knowledge of chemistryA metal worker uses a cutting torch that operates by reactingacetylene gas, C2H2(g), with oxygen gas, O2(g), as shown inthe unbalanced equation below.CH,(g) + 0,(g) → CO2(g) + H2O(g) + heat
Answers
In order to properly balance an equation, we need to make sure that the same amount of elements on the reactants side matches the number of elements on the products side, we can do that by increasing the number in front of each molecule, the so called stoichiometric coefficient.
The proper balancing for this question is:
2 C2H2 + 5 O2 -> 4 CO2 + 2 H2O
Therefore the coefficients are:
2, 5, 4, 2
Molar Mass related question (22b)
how do I solve?
Answers
The molar mass of potassium nitrate is 101.102 g/mol while that of potassium nitrite is 85.103 g/mol.
Molar mass calculationPotassium nitrate goes by the chemical formula \(KNO_3\).
K = 39.098
N = 14.007
O = 15.999
Molar mass of \(KNO_3\) = 39.098 + 14.007 + (3x15.999)
= 101.102 g/mol
Potassium nitrite goes by the chemical formula, \(KNO_2\).
Molar mass of \(KNO_2\) = 39.098 + 14.007 + (2x15.999)
= 85.103 g/mol
In other words, the molar masses of KNO3 and KNO2 are 101.102 g/mol and 85.103 g/mol respectively.
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What is the outcome of all chemical changes when two substances are combined?
Answers
Answer:
This is called a chemical reaction. gas may form.heat may be produced and the color may change
1.2.5 Practice: Chemistry in the World Chemistry Sem 1 Points Possible:25
Question 2: Scientists Observe Patterns and Rules
Observations of the physical world lead to the discovery of patterns. Understanding patterns leads to the discovery of rules. Understanding rules leads to the discovery of how the physical world works.
a. Patterns in nature involve anything that happens over and over again. A pattern could repeat itself at a specific time of day, time of the month, or time of year. Describe one of these kinds of patterns. (Example: A full moon occurs every 28 days.) (1 point)
b. What rule does the pattern you picked above point to? (Example: The appearance of a full moon every 28 days means that the moon orbits the Earth every 28 days.) (1 point)
Question 3: The Scientific Method
a. The Question:
In 1988, three gray whales were trapped in Arctic ice. Television crews captured the frantic attempts of hundreds of people to save the whales. Eventually, a Soviet icebreaker and U.S. National Guard helicopters arrived to help free the whales. The cost of the rescue mission exceeded $5 million.
i. Write a scientific question related to the whale story. (1 point)
ii. Write a nonscientific question related to the whale story. (1 point)
b. The Hypothesis:
Your little sister asks you a scientific question: "Does chocolate milk come from brown cows?" In order to answer the question, you decide to form a hypothesis.
Explain whether or not the following statements are effective hypotheses.
i. Brown cows produce chocolate milk. (1 point)
ii. Brown cows never produce chocolate milk. (1 point)
iii. Brown cows produce white milk. (1 point)
c. The Experiment:
i. A student conducts an experiment to determine whether adding salt causes water to boil more quickly. The student plans to heat two pots of water and measure how long they take to boil. One pot has salt in it and the other does not. The pot of water with salt added is the experimental group. The pot of water without salt is the control group. For the boiling saltwater experiment described, list three things that would make the control group ineffective. (1 point)
•.
•.
•.
ii. How might data for this experiment be organized to help look for patterns? (1 point)
iii. Why is peer review important? (1 point)
Question 4: History of Chemistry
a. How did Aristotle's idea of matter differ from that of scientists? (1 point)
b. Why wasn't alchemy considered a "real" science? (1 point)
c. Why is modern chemistry considered scientific? (1 point)
Question 5: Chemicals in Our World
a. A sign above a supermarket display of oranges reads:
Organic Produce
No chemicals were used to harvest this fruit!
How accurate is this claim? Why or why not? (1 point)
b. Name one way chemicals can help the environment. (1 point)
c. Name one way chemicals can hurt the environment. (1 point)
Question 6: Chemicals and Safety
a. Name a chemical or product that was once considered safe but is now considered harmful. (1 point)
b. Name a chemical that is safe to use in food in small amounts. (1 point)
c. Why do chemists routinely test existing chemicals? (1 point)
Question 7: The Scientist and Society
a. How do ethical guidelines make science safer? (1 point)
b. How does government funding affect scientific progress? (1 point)
c. In what way do scientists help the government do its work? (1 point)
d. What obligations do scientists have to society? (1 point)
Answers
One way chemicals can help the environment is by using synthetic pesticides and fertilizers to increase crop yields while minimizing water usage. This helps to reduce the land area needed for farming, which in turn reduces deforestation. It also decreases the need to clear additional land for cultivation, which reduces greenhouse gas emissions and helps to prevent soil erosion. Additionally, some chemicals can be used to clean up contaminated soil and water sources, such as in the case of oil spills or industrial pollution.
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If the molecular mass of methanol is 32. 04 g/mol, what would be the mass of a 56. 6 mole sample?.
Answers
Molecular Mass liquid methanol. CH3OH has to have a molar mass of 32.04186 g/mol. Calculating ounces For using protons or methanol grammes of methanol Calculation of the molecular weight: 12.0107 + 1.0794*3 + 15.9994 + 1.0794 ›› Composition by percentages each element.
The quantity is in kilograms per mole. Each element has a definite characteristic known as molar mass; for instance, water has a molar mass of approximately 18 g/mol. Furthermore, using the formula, our calculator can determine the mass of materials users really ought to add too your mixture in order to reach the appropriate molar concentration.
CH3OH's number of moles is 32.04186 g/mol.
Estimating approximate molecular weight
12.0107 + 1.00794*3 + 15.9994 + 1.00794
G/mol units are really the place to start for estimating molar mass. when calculating out such a chemical compound's molecular weight.
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Which of the following is true of a reaction with a negative enthalpy?
O A. The enthalpy of the reactants is greater than that of the products.
B. The reaction has a negative activation energy.
C. The enthalpies of the products and reactants are both negative.
D. The enthalpy of the reactants is less than that of the products.
Answers
Answer: The statement enthalpy of the reactants is greater than that of the products is true of a reaction with a negative enthalpy.
Explanation:
A chemical reaction where energy is being released is called an exothermic reaction.
In an exothermic reaction, the value of enthalpy of reaction is negative in nature.
Also, heat is being released which means the reactants has more energy than the products due to which the value of enthalpy is negative.
Thus, we can conclude that the statement enthalpy of the reactants is greater than that of the products is true of a reaction with a negative enthalpy.
Answer:
A
Explanation:
trust
A wave has a length of 380 nm. Find its frequency in Hz.
Answers
Answer:
The shortest wavelength of visible light is 380 nm. Its frequency is 7.89x1014Hz. That will be visible light’s highest frequency.
Explanation:
How do living things (such as animals) affect the phosphorus cycle?
Answers
Explanation:
Phosphorus moves in a circle through rocks, water, soil and sediments and organisms. Over time, rain and weathering cause rocks to release phosphate ions and other minerals.Thor pushes a car with a mass of 2500 kg. It accelerates 5 m/s2. How much force did Thor apply?
Answers
Answer:
The answer is 12500 NExplanation:
The force acting on an object given it's mass and acceleration can be found by using the formula
force = mass × acceleration
From the question we have
force = 2500 × 5
We have the final answer as
12500 NHope this helps you
TRUE OR FALSE : Cell specialization is when a cell has a particular function or job.
help ?
Answers
Answer:
True
Explanation:
Cell specialization is the process by which generic cells change into cells meant to do certain tasks within the body
hope this helps :)
1. When the velocity of an object changes, it is acted upon by a(n)
deceleration.
inertia.
momentum.
force.
Answers
Answer:
when the velocity of an object changes,it is acted upon by an external force
When the velocity of an object changes, it is acted upon by a force. Therefore, option D is correct.
What causes a change in velocity explain ?Forces have an impact on how objects move. They can cause motion; they can also slow, stop, or change the direction of motion of an already moving object.
We can say that forces cause changes in velocity because they cause changes in an object's speed or direction. Keep in mind that acceleration is defined as a change in velocity.
Because velocity is a vector quantity, the given statement is correct. It is affected by both magnitude and direction. When one or both of them change, the velocity changes as well.
Thus, When the velocity of an object changes, it is acted upon by a force, option D is correct.
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Name the following alkane molecule:
ch3
|
ch3chch2chchch3
1
ch3 ch3
a. 2,3,5-trimethylhexane
b. 2,4,5-trimethylhexane
c. 2,3,5-triethylhexane
Answers
2,3,5-trimethylhexane is indeed an alkane with a methyl group replaced at positions 2,3, and 5. It serves as just a human metabolite. It is a volatile organic chemical and an alkane. It is derived from a hexane hydride.
Alkanes are a class of chemicals that have solitary covalent connections between carbon and hydrogen atoms. These are referred to as saturated hydrocarbons. This class of compounds is made up of hydrogen and carbon joined together by a single covalent bond. A analogous series with the chemical formula CnH2n+2 is also included.
Alkanes are the most basic hydrocarbon family. They exclusively contain carbon and hydrogen. Each carbon atom creates four bonds, but each hydrogen atom only forms one. Line-angle formulae are used by chemists because they are simpler and quicker to draught than condensed structural formulations. Alkane structural formulae can also be expressed in a condensed form. The basic alkane methane has one carbon - carbon double bond and the chemical formula CH4.
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if you want to make 1500 grams of a 2.8% by mass glucose solution how many grams of glucose do you need to add (i will give brainliest)
Answers
You need to add 42 grams of glucose to make 1500 grams of a 2.8% glucose solution.
To calculate the amount of glucose you need to add to make 1500 grams of a 2.8% glucose solution, you first need to determine what 2.8% by mass means.
2.8% by mass means that there are 2.8 grams of glucose per 100 grams of solution.
So, if you want to make 1500 grams of a 2.8% glucose solution, you can use the following equation:
mass of glucose = (percent by mass / 100) x total mass of solution
mass of glucose = (2.8 / 100) x 1500
mass of glucose = 42 grams
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Which word equation shows hydrogen reacting with oxygen to form water?
oxygen + water → hydrogen
hydrogen + oxygen → water
oxygen + water hydrogen + water
→
Ohydrogen + water →→ oxygen
Answers
Answer:
calcule o PH e POH de 2,625g de HCLO em 2000cm3 (cl=35,5)
Explanation:
The word chemical equation which hydrogen reacting with oxygen to form water is hydrogen + oxygen → water.
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 .
The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.
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If the pOH of a solution is 2, what is the concentration of H+ ions in that solution?
Answers
pH = 14 - 2 = 12
[H+] = 10^-pH = 10^-12
[H+] = 1 • 10^-12 M
100 cm³ of a gas at 27°C is cooled to 20°C at constant pressure .Calculate the volume of gas at 20°C.
Answers
According to Charle's law, the volume of the given mass of a gas is directly proportional to its absolute temperature provided that the pressure is constant. Mathemically;
\(\begin{gathered} V\alpha T \\ V=kT \\ k=\frac{V}{T} \\ k=\frac{V_1}{T_1}=\frac{V_2}{T_2} \end{gathered}\)where;
V1 and V2 are the initial and final volume of the gas
T1 and T2 are the initial and final temperatures of the gas (in Kelvin)
Given the following parameters:
\(\begin{gathered} V_1=100\operatorname{cm}^3 \\ T_1=27^0C=27+273=300K \\ T_2=20^0C=20+273=293K \\ V_2=\text{?} \end{gathered}\)Substitute the given parameters into the formula;
\(\begin{gathered} V_2=\frac{V_1T_2}{T_1}^{} \\ V_2=\frac{100\times293}{300} \\ V_2=\frac{29300}{300} \\ V_2=\frac{293}{3} \\ V_2=97.67\operatorname{cm}^3 \end{gathered}\)Therefore the volume of the gas at 20°C is approximately 97.67cm³
Name the process by which the ammonia and hydrogen Chlorade
gass
nove in the tube-
Answers
Explanation: Process is diffusion. The gas molecules follow a zig-zag path through the tube as they collide with the air molecules in the tube. The purpose of the glass tube is to eliminate air currents and to see if the gas molecules will move on their own.
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What is a lone pair?
A. Two pairs of electrons that form a double bond
B. Two atoms that have been pushed close to each other
C. A pair of electrons that is not used in bonding
D. A diatomic molecule attracted to no other molecule
Answers
Answer:
I BELIEVE IT is c.
Explanation:
Can you identify the function of these components of a cell's plasma membrane? check all statements that are correct. (choose 4)
Answers
The plasma membrane of the cell serves as a protective covering, has receptors that permit cell-to-cell communication, and permits specific chemicals or proteins to enter the cell.
The outer barrier of cells is formed by the plasma membrane. The membrane is tiny, incredibly thin, and porous. Cytoplasm is a clear, jelly-like material found inside every cell. Organelles from cells can be found in it, and it is viscous. The nucleus is in charge of the cell's overall functionality. Plasma membranes contain embedded proteins that assist in carrying out a number of tasks. The plasma membrane mostly accomplishes the following tasks: - Recognizes cells and aids in the movement of chemicals. helps to safeguard the cell by preserving a healthy environment inside the cell.
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The complete question is -
Can you identify the function of these components of a cell's plasma membrane? check all statements that are correct.
a The cell's plasma membrane acts as a protective layer
b The cell's plasma membrane does not acts as a premessive layer
c The cell's plasma membrane allows harmful germs
d The cell's plasma membrane does not exist in humans
The regiochemistry of hydroboration/oxidation of alkenes is: (a) Markovnikov (b) non-Markovnikov (c) subject to solvent effects (d) unrelated to alkene structure (e) it is a not a regiospecific reaction.
Answers
The regiochemistry of hydroboration/oxidation of alkenes is (a) Markovnikov.
The hydroboration/oxidation reaction follows Markovnikov's rule, which states that the electrophile (in this case, the boron atom) adds to the carbon atom of the double bond that has the greater number of hydrogen atoms attached to it. The regioselectivity of the reaction is determined by the relative stability of the carbocation intermediates formed during the reaction.
In hydroboration, the boron atom adds to the less substituted carbon atom of the double bond, leading to the formation of a boron-alkyl bond and a boron-hydrogen bond. Subsequently, in the oxidation step, the boron-alkyl bond is replaced with an alcohol group (-OH) while maintaining the regiochemistry established during hydroboration.
Therefore, the regiochemistry of hydroboration/oxidation of alkenes is Markovnikov, where the electrophilic addition occurs preferentially at the carbon atom of the double bond that has the greater number of hydrogen atoms attached to it.
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which statements describe the great basin desert
Answers
The options can not be found on the internet so i will provide overview on the great basin desert below;
What is great basin desert ?The Great Basin Desert is a vast arid region located in the western United States, covering parts of Nevada, Utah, California, Oregon, Idaho, and Wyoming. It is named after the Great Basin, a region of relatively flat land surrounded by mountain ranges that drain internally.
The Great Basin Desert is characterized by a high elevation and a semiarid climate with hot summers and cold winters. The average annual precipitation in the region is low, ranging from 5 to 15 inches, and is highly variable from year to year. The desert is dominated by sagebrush and other shrubs, and it is home to a variety of animals, including mule deer, pronghorn antelope, coyotes
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We wish to determine how many grams
of solid silver chromate will precipitate
when 150. mL of 0.500 M silver nitrate
solution is added to excess potassium
chromate.
2AgNO3(aq)
How many moles of AgNO3 are present
in 150. mL of 0.500 M AgNO3?
+ K₂ CrO4 (aq) → Ag₂ CrO4(s) + 2KNO3(aq)
Answers
Approximately 12.45 grams of solid silver chromate will precipitate when 150 mL of 0.500 M silver nitrate solution is added to excess potassium chromate.
To determine the number of moles of AgNO3 present in 150 mL of a 0.500 M AgNO3 solution, we can use the formula:
moles = concentration × volume
Given:
Concentration of AgNO3 solution = 0.500 M
Volume of AgNO3 solution = 150 mL
First, we need to convert the volume from milliliters (mL) to liters (L) since the concentration is given in moles per liter (M).
1 L = 1000 mL
Therefore, the volume of the AgNO3 solution in liters is:
150 mL × (1 L / 1000 mL) = 0.150 L
Now we can calculate the moles of AgNO3 using the formula:
moles = concentration × volume
moles = 0.500 M × 0.150 L
moles = 0.075 mol
So, there are 0.075 moles of AgNO3 present in 150 mL of the 0.500 M AgNO3 solution.
Now, let's proceed to determine how many grams of solid silver chromate (Ag2CrO4) will precipitate when the AgNO3 solution reacts with excess potassium chromate (K2CrO4).
From the balanced chemical equation:
2AgNO3(aq) + K2CrO4(aq) → Ag2CrO4(s) + 2KNO3(aq)
We can see that the molar ratio between AgNO3 and Ag2CrO4 is 2:1. Therefore, for every 2 moles of AgNO3, we will form 1 mole of Ag2CrO4.
Since we have 0.075 moles of AgNO3, we can calculate the moles of Ag2CrO4 formed:
moles of Ag2CrO4 = 0.075 mol / 2 = 0.0375 mol
To determine the mass of Ag2CrO4, we need to multiply the moles by its molar mass. The molar mass of Ag2CrO4 is calculated by summing the atomic masses of each element in the compound:
Ag2CrO4 = 2(Ag) + 1(Cr) + 4(O) = 2(107.87 g/mol) + 1(52.00 g/mol) + 4(16.00 g/mol) = 331.87 g/mol
mass of Ag2CrO4 = moles of Ag2CrO4 × molar mass of Ag2CrO4
mass of Ag2CrO4 = 0.0375 mol × 331.87 g/mol = 12.45 g
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If a body was lying on their back when they died, and was moved to their front after 12 hours, where would one see the skin discoloration from pooling blood?
Answers
Answer:the parts of the body which is nearest to the ground ie thier back will show discoloration
Explanation:
If the body remains at a position for long hours, the parts of the body which is nearest to the ground can develop a skin discoloration as a result of pooling of blood in the tissues and this is called livor mortis, which tends to be permanent from 8Hours upwards.