Answers
Answer:
If blood was to be found at a crime scene, the type of analysis that would be required is chemical blood type.
It should be sent to biological comparison.
After the testing DNA typing should be gained.
hope this helps :)
Explanation:
Related Questions
How many moles of sodium nitrate are in 2.0L of a 0.50M solution
Answers
INFORMATION:
We know that:
- there are 2.0L of solution
- the solution has a molarity of 0.50M
And we must find the number of moles of the solute (sodium nitrate)
STEP BY STEP EXPLANATION:
To find it, we need to use the formula of the molarity
\(Molarity=\frac{moles\text{ of solute}}{litres\text{ of solution}}\)Is given that,
- Molarity = 0.50M = 0.50 mol/L
- litres of solution = 2.0L
Now, replacing in the formula
\(0.50\frac{mol}{L}=\frac{moles\text{ of solute}}{2.0L}\)Finally, solving for the moles of solute
\(\begin{gathered} 0.50\frac{mol}{L}\cdot2.0L=moles\text{ of solute} \\ 1.0mol=moles\text{ of solute} \\ moles\text{ of solute}=1.0mol \end{gathered}\)ANSWER:
There is 1.0mol of sodium nitrate in 2.0L of a 0.50M solution
Hi can anyone please answer this!
Answers
Ai. The car's initial kinetic energy is 22657.94 J
Aii. The car's initial potential energy is 939960.1 J
B. The car's final kinetic energy is 171420.38 J
C. The car's change in kinetic energy is 148762.44 J
Ai. How do I determine the car's initial kinetic energy?
We can obtain the initial kinetic energy of the car as illustrated below:
Mass (m) = 1250 lb = 1250 × 0.453592 = 566.99 Kginitial Velocity (u) = 20 mi/h = 20 × 0.44704 = 8.94 m/sInitial Kinetic energy (KE₁) =?KE₁ = ½mu²
KE₁ = ½ × 566.99 × 8.94²
KE₁ = 22657.94 J
Aii. How do I determine the car's initial potential energy?
The car's initial potential energy can be obtained as shown below:
Mass (m) = 566.99 KgHeight (h) = 555 ft = 555 × 0.3048 = 169.164 mAcceleration due to gravity (g) = 9.8 m/s² Initial Potential energy (PE₁) = ?PE₁ = mgh
PE₁ = 566.99 × 9.8 × 169.164
PE₁ = 939960.1 J
B. How do I determine the car's final kinetic energy?
The final kinetic energy of the car can be obtained as illustrated below:
Mass (m) = 1250 lb = 1250 × 0.453592 = 566.99 Kginitial Velocity (u) = 55 mi/h = 55 × 0.44704 = 24.59 m/sFinal Kinetic energy (KE₂) =?KE₂ = ½mv²
KE₂ = ½ × 566.99 × 24.59²
KE₂ = 171420.38 J
C. How do I determine the car's change in kinetic energy?
The change in the kinetic energy of the car can be obtained as follow:
Initial Kinetic energy (KE₁) = 22657.94 JFinal Kinetic energy (KE₂) = 171420.38Change in kinetic energy (ΔKE) =?ΔKE = KE₂ - KE₁
ΔKE = 171420.38 - 22657.94
ΔKE = 148762.44 J
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The pH at the Half-equivalence point of a weak base - strong acid tritation is:
A. Equal to pka
B. Equal to pKb
C. Less than 7.0
D. Equal to 7.0
E. Greater than 7.0
Answers
Answer:
Less than 7
Explanation:
during the titration of strong acid and weak base, the weak base is usually kept in the flask and strong acid is kept in the burette. So when we add strong acid slowly drop by drop, slowly the pH level of solution starts to decrease and at equivalence point the acid overpowers the base as a strong acid was taken over a weak base.
How was electron dicovered (detailed answer required)
Answers
Answer:
J.J. Thomson.
Explanation:
The credit for the discovery of the electron and its properties goes to J.J. Thomson based on his experiments carried out in a discharge tube. He suggested that electrons are necessary constituents of all atoms. J.J. Thomson carried out experiments by taking a gas at low pressure of 0.01mm Hg in a discharge tube.
Answer:
J.J. Thomson used a Crookes, or cathode ray, tube to conduct experiments that led to the discovery of the electron in 1897. He provided evidence that cathode rays have a negative charge. He also investigated positively charged neon gas particles.
Explanation:
What differentiates the isotopes of an element?
A. number of protons
B. number of neutrons
C. number of electrons
D. atomic number
Answers
Help with chemistry??
Answers
Answer:
The first image = double replacement
Second = single replacement
Third = Decomposition
Fourth = Combination
Explanation:
1. a color from each pair is being swapped and replacing each other so there is a double replacement
2. only the blue and the red are changing places so it is single replacement
3. the pair is being separated (decomposed)
4. the red and green are coming together (combined)
The basic unit of structure and function of living things is the .
Answers
Answer:
It would be cell
Explanation:
If im correct then please mark me as brainliest!
Tell what you should do to prepare for equip calibration
-Check that all nozzles are the same and of the desired flow rate and pattern -clean all nozzle and screens -add clean water to the spray tank and adjust the pressure to the desired level while the pump is operating at normal speed. make sure water is flowing through the nozzles -Check the spray patterns from each nozzle -With the sprayer stationary and operating at the desired pressure, hold a measuring cup marked in fluid ounces directly under each nozzle for 1 min. -calculate the average output (flow rate) by dividing the total amount collected by the number of nozzles. -replace any nozzle whole flow rate is 5% greater or less than the average.
Answers
The equipment can be properly calibrated to ensure that the spray application rate is consistent and accurate, which is important for achieving the desired level of control while minimizing waste and avoiding off-target effects.
To prepare for equipment calibration, the following steps should be taken:
Check that all nozzles are the same and of the desired flow rate and pattern. Clean all nozzle and screens. Add clean water to the spray tank and adjust the pressure to the desired level while the pump is operating at normal speed. Make sure water is flowing through the nozzles.
Check the spray patterns from each nozzle. With the sprayer stationary and operating at the desired pressure, hold a measuring cup marked in fluid ounces directly under each nozzle for 1 min.
Calculate the average output (flow rate) by dividing the total amount collected by the number of nozzles. Replace any nozzle whose flow rate is 5% greater or less than the average.
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Which element requieres the least amount of energy to remove the outermost electron
Answers
Answer: Sodium
Explanation: The sodium has only one electron at the outer layer.
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Compound C with molar mass 205gmol-1 , contains 3.758g of carbon , 0.316g of hydrogen and 1.251g of oxygen. Determine the molecular formula.
Answers
Answer:
Molecular formula => C₁₂H₁₂O₃
Explanation:
From the question given above, the following data were obtained:
Molar mass of compound = 205gmol¯¹
Mass of Carbon (C) = 3.758 g
Mass of Hydrogen (H) = 0.316 g
Mass of Oxygen (O) = 1.251 g
Molecular formula =?
We'll begin by determining the empirical formula of the compound. This can be obtained as follow:
C = 3.758 g
H = 0.316 g
O = 1.251 g
Divide by their molar masses
C = 3.758 /12 = 0.313
H = 0.316 /1 = 0.316
O = 1.251 /16 = 0.078
Divide by the smallest.
C = 0.313 / 0.078 = 4
H = 0.316 / 0.078 = 4
O = 0.078 / 0.078 = 1
Thus, the empirical formula of the compound is C₄H₄O
Finally, we shall determine the molecular formula of the compound. This can be obtained as follow:
Molar mass of compound = 205gmol¯¹
Empirical formula => C₄H₄O
Molecular formula =>?
[C₄H₄O]ₙ = 205
[(12×4) + (4×1) +16]n = 205
[48 + 4 +16]n = 205
68n = 205
Divide both side by n
n = 205 / 68
n = 3
Molecular formula => [C₄H₄O]ₙ
Molecular formula => [C₄H₄O]₃
Molecular formula => C₁₂H₁₂O₃
When carbon dioxide dissolves in water, it sometimes reacts with water to form carbonic acid as in this balanced equation:
CO2 + H2O → H2CO3.
If 495 milliliters of carbon dioxide at 25°C and 101.3 kilopascals reacts with excess water, what is the theoretical yield of carbonic acid?
Use the periodic table and the ideal gas resource.
Answers
The theoretical yield of carbonic acid is 12 %.
What is carbon dioxide ?
One part carbon and two parts oxygen make up the gas called carbon dioxide. Its usage by plants to create carbohydrates during a process known as photosynthesis makes it one of the most significant gases on the planet.
What is reaction ?
The transformation of one or more reactants into one or more new products is referred to as a chemical reaction. Substances are made of chemical constituents or compounds. The transformation of one or more reactants into one or more new products is referred to as a chemical reaction. Substances are made of chemical constituents or compounds.
Therefore, The theoretical yield of carbonic acid is 12 %.
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how Is disaccharide is hydrolyzed into monosaccharides
Answers
How many bonds are in NH4¹+?
2
3
5
4
Answers
Answer:
3 Covalent Bonds and 1 Co ordinate Bond
Explanation:
4 bonds are in NH4¹+
NH4¹+ is the ammonium ion, which consists of a central nitrogen atom (N) and four hydrogen atoms (H). Nitrogen is located in group 15 of the periodic table and has 5 valence electrons. Hydrogen, on the other hand, has 1 valence electron.
To achieve a stable electron configuration, nitrogen needs to share electrons with the hydrogen atoms. Each hydrogen atom can form a single bond with the nitrogen atom by sharing its valence electron.
In NH4¹+, all four hydrogen atoms form single bonds with the central nitrogen atom. These bonds are represented by lines connecting each hydrogen atom to the nitrogen atom.
So, NH4¹+ has 4 bonds. Each bond represents a pair of electrons shared between the nitrogen atom and a hydrogen atom. The bonding arrangement ensures that the nitrogen atom has a complete octet (eight valence electrons) and each hydrogen atom has two electrons, following the stable configuration of helium.
The "+1" charge on NH4¹+ indicates that the ion has lost one electron, resulting in a positive charge. However, the number of bonds remains the same regardless of the charge.
Therefore, the correct answer is 4 for the number of bonds in NH4¹+.
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between Au3+ and Au+ which has a larger radius and why
Answers
Answer:
Au+ has larger radius than Au3+ Atomic no. of au is 79 , to become au3+ it has to loose 3 electrons and to become au+ it has to loose one electron if it loose 3 electrons the nucleus force will bound the other electrons strongly and the orbital radius will become small as compared to the parent atomWhich example has particles that can be drawn closer to occupy smaller volume? a. fruit juice b. block of wood c. air inside the syringe d. ice cube
Answers
The capacity of an object is measured by its volume. For instance, a cup's capacity is stated to be 100 ml if it can hold 100 ml of water in its brim. Here ice cube has particles that can be drawn closer to occupy smaller volume. The correct option is D.
Due to the strong intermolecular interactions, the solid molecules are very near to one another. Solids have a low volume and a high density as a result. Additionally, the solid molecules cannot be easily crushed due to the narrow intermolecular distance.
So here ice cube has small volume.
Thus the correct option is D.
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Which is the electron configuration for bromine?
Answers
Answer:
The answer below would be written in a straight line from left to right but I wrote it as a list to make it easier to read.
Explanation:
1s^2
2s^2
2p^6
3s^2
3p^6
4s^2
3d^10
4p^5
1. An isotope of cesium-137 has a half-life of 30 years. If 5.0 g of cesium-
137 decays over 60 years, how many grams will remain?
Answers
Answer:
1.25 g
Explanation:
Now we have to use the formula;
N/No = (1/2)^t/t1/2
N= mass of cesium-137 left after a time t (the unknown)
No= mass of cesium-137 present at the beginning = 5.0 g
t= time taken for 5.0 g of cesium-137 to decay =60 years
t1/2= half life of cesium-137= 30 years
Substituting values;
N/5= (1/2)^60/30
N/5= (1/2)^2
N/5= 1/4
4N= 5
N= 5/4
N= 1.25 g
Therefore, 1.25 g of cesium-137 will remain after 60 years.
If a less concentrated initial solution of sodium bicarbonate was used in beaker C, would that solution require more or less bicarbonate to neutralize the acid? Why?
Answers
If a less concentrated initial solution of sodium bicarbonate was used in beaker C, it would require more bicarbonate to neutralize the acid.
What is concentrated?Concentrated means something that has been increased in strength or power by reducing its volume. It can refer to a solution that has a higher concentration of solutes than the original solution, a sound that is louder or stronger, or a force that is more powerful or intense. Concentrated can also refer to a person’s focus or attention on one particular thing, when their thoughts and energy are directed to a single point.
This is because the concentration of sodium bicarbonate determines how much of the acid can be neutralized by the solution. If the initial solution is less concentrated, then it will take more of the bicarbonate to neutralize the same amount of acid.
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predict the direction favored of the following equilibrium equation
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Comparing the stabilities of two negative charges on opposite sides of the equilibrium-arrows is one method for determining whether the reactants or products are preferred in an equilibrium. Because this side has less energy, it is preferred, whichever side has the more stable negative charge.
How do you know which side is favored at equilibrium?It is well knowledge that nature prefers low energy conditions. Remember that we may use the Protocol to compare the stability of two negative charges, where the more stable negative charge has a lower energy, and that this evaluation can be done while keeping this concept in mind.Comparing the stabilities of two negative charges on opposite sides of the equilibrium-arrows is one method for determining whether the reactants or products are preferred in an equilibrium. Because this side has less energy, it is preferred, whichever side has the more stable negative charge.Considering what transpires once you reach the more stable negative charge is one method to understand why this assertion is correct.Because you are content with where you are—a place of low energy—if you have recently moved to a more solid job, you are less likely to react negatively.By contrasting the negative charges on an oxygen and a nitrogen in the aforementioned example, we are putting the protocol to use. Since the charges on two atoms in the same row of the periodic table are being compared, we use electronegativity (#2 on the Protocol) to ascertain the relative stabilities.To Learn more About equilibrium refer To:
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You wish to construct a galvanic cell with the anode consisting of a Ni electrode in a 1.0 M Ni(NO3)2 solution. What would be the highest standard cell potential if used as the cathode in this galvanic cell?
Answers
Answer:
Au^3+(aq) +3e ------> Au(s). 1.50 V
Explanation:
When we construct the galvanic cell, our intention is to produce energy by spontaneous electrochemical reactions. In order to have a spontaneous electrochemical reaction, E°cell must be positive. The more positive the value of E°cell, the more spontaneous the reaction is.
E°cell= E°cathode - E°anode
If E°cathode= 1.50 V
E°anode= -0.25 V
E°cell= 1.50 -(-0.25)
E°cell= 1.75 V
Hence the process; Au^3+(aq) +3e ------> Au(s) yields the highest standard cell potential
Two asteroids are 75,000 m apart one has a mass of 8 x 10^7 N what is the mass of the other asteroid
Answers
The mass of the asteroid is C. 1.2 x \(10^{12}\) Kg
To find the mass of the other asteroid, we can rearrange the equation for the gravitational force between two objects:
F = (G * m1 * m2) / \(r^{2}\)
where F is the force of gravity, G is the gravitational constant, m1 and m2 are the masses of the two asteroids, and r is the distance between them.
Given that the distance between the asteroids is 75000 m, the force of gravity between them is 1.14 N, and one asteroid has a mass of 8 x \(10^{7}\) kg, we can substitute these values into the equation and solve for the mass of the other asteroid (m2):
1.14 N = (6.67430 × \(10^{-11}\) N \(m^{2}\)/\(Kg^{2}\) * 8 x \(10^{7}\) kg * \(m2\)) / \((75000 m)^{2}\)
Simplifying and solving the equation, we find that the mass of the other asteroid (m2) is approximately 1.2 x \(10^{12}\) kg. Therefore, Option C is correct.
The question was incomplete. find the full content below:
Two asteroids are 75000 m apart one has a mass of 8 x \(10^{7}\) kg if the force of gravity between them is 1.14 what is the mass of the asteroid
A. 3.4 x \(10^{11}\) kg
B. 8.3 x \(10^{12}\) kg
C. 1.2 x \(10^{12}\) kg
D. 1.2 x \(10^{10}\) kg
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Explain what you discovered from the Simulation about why food coloring spreads faster in warmer water.
Answers
Answer:
the water molecules have more energy and are moving faster than the molecules of cold water. This makes it easier for the dye to get mixed throughout the hot water.
Explanation:
Answer:
Because particles moves more by kinetic energy and diffusion will spread with the particles
Explanation:
How many electrons are in 1 mole of carbon atoms?
Answers
Answer:
6 electrons
Explanation:
Given a concentration of a solution, determine the amount of solute. Percent volume to volume is the ratio of the volume of solute to the volume of the entire solution. A beer that is 2.50% (vlv) alcohol has mL of ethanol per glass (250.0 mL) of beer: mL 2 3 5 8 +/- X100
Answers
A beer that is 2.50% (vlv) alcohol has 6.25 mL of ethanol per glass (250.0 mL) of beer.
"Percent volume to volume" (vlv) is a way to express the concentration of a solution. It is defined as the volume of solute divided by the volume of the entire solution, multiplied by 100%.
In this case, we are given that a beer is 2.50% (vlv) alcohol. This means that the volume of ethanol in the beer is 2.50% of the total volume of the beer.
To calculate the amount of ethanol in a 250.0 mL glass of beer, we can use the following formula:
Volume of ethanol in mL = Percent vlv x Volume of solution in mL / 100
Plugging in the given values, we get:
Volume of ethanol in mL = 2.50 x 250.0 / 100 = 6.25 mL
Therefore, a beer that is 2.50% (vlv) alcohol has 6.25 mL of ethanol per glass (250.0 mL) of beer.
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which formulas represent two polar molecules
Answers
According to the given question H₂O and HCl are the two formulas which represent two polar molecules.
H₂O is polar molecule because- A water molecule has two poles: a positive charge on the hydrogen pole (side) and a negative charge on the oxygen pole due to the unequal sharing of electrons between the atoms and the asymmetrical form of the molecule (side). The water molecule is referred to as electrically polar.
HCl is a polar molecule - Because chlorine is more electronegative than hydrogen, it draws the bound electron pair somewhat closer to it and obtains a partial negative charge, while hydrogen gains a partial positive charge, making HCl (hydrochloric acid) a polar molecule.
Therefore, H₂O and HCl represents two polar molecules.
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Which statement about members of a homologous series is true
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The statement "Each member of a homologous series differs from its nearest neighbors by 14 amu" is true of members about a homologous series.
What are homologous series?In organic chemistry, a homologous series unveils itself as a sequential assembly of compounds exhibiting an identical functional group, boasting akin chemical traits. Within this series, the constituents can either sport a branched or unbranched structure, or deviate through the molecular formula of CH2 and a molecular mass variation of 14u.
This divergence may manifest as the elongation of a carbon chain, as observed in the linear alkanes (paraffins), or as the augmentation in the count of monomers forming a homopolymer, such as amylose.
The entities belonging to a homologous series typically embrace a fixed assortment of functional groups, thereby conferring upon them resemblant chemical and physical characteristics.
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.....m..........m.....mm...
Answers
Answer:
Nuclear Regulatory Commission
In paragraphs 11-16 of "Miss Brill," Mansfield includes the scene in which a young couple joins Miss Brill on her special bench. What is the significance of this scene? Select each correct answer. Miss Brill overhears their arguing and decides it is her role to interrupt and help them resolve their dispute. The story reaches its climax when Miss Brill realizes how others see her, and her sense of importance is destroyed. Miss Brill envisions the couple as the romantic heroes of the play she imagines all of them to be a part of The young couple takes the place of the old couple, just as younger generations replace older.
Answers
In paragraphs 11-16 of "Miss Brill," Mansfield includes the scene in which a young couple joins Miss Brill on her special bench and the significance of this scene includes the following:
The story reaches its climax when Miss Brill realizes how others see her, and her sense of importance is destroyed. Miss Brill envisions the couple as the romantic heroes of the play she imagines all of them to be a part of. What is the significance of this scene?In this scene, we can see Miss Brill having a good time in the park but coming to realize soon enough that the couple who she admired and planned to listen to did not think kindly of her. This made the woman sad even as she walked down to her home.
Her sense of importance was dealt a blow in this case. In this story also, Miss Brill applied her ability to envision a joyful scene.
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What are all the possible metabolites for the clofibrate structure through metabolism pathways like hydrolysis, alkylation, conjugation, oxidation etc. ?
Answers
Clofibrate is a lipid-lowering pharmaceutical that has been utilized to treat hyperlipidemia. Its metabolism system includes different pathways such as hydrolysis, oxidation, conjugation, and others.
What are a few potential metabolites of clofibrate?Metabolites are little molecules that are produced during the process of metabolism in living living beings.
Clofibrate hydrolysis metabolite:
2-(4-Chlorophenoxy)-2-methylpropanoic acid (phenoxyisobutyric acid)Clofibrate oxidation metabolites:
4-Chlorophenylacetic acid4-Chlorobenzaldehyde4-Chlorophenylacetyl-CoAClofibrate alkylation metabolites:
No specific alkylation metabolites have been widely reported for clofibrate.Clofibrate conjugation metabolites:
Glucuronide conjugatesSulfate conjugatesConclusively, the relative abundance and significance of each metabolite can vary among individuals.
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a bullet travels at 500 m/s. How long will it take a bullet to go 1000m?
Answers
Answer:
2 seconds
Explanation:
So we set up the equation
500s = 1000, divide 1000 by 500
1000/500 = 2
So s = 2, it will take two seconds for the bullet to travel 1000m