Answers
Answer:
O The sound waves are reflected.
Explanation:
When sound waves released by a bat hits an object, the sound waves are reflected back.
Bats used sound reflection for echolocation to determine the position of nearby objects.
Also, they use it to determine the shape and size of objects.
The mechanism where bats use sound to determine location is known as echolocation. The bat picks up the reflected sound and projects the location of their targets.Answer:
B
The sound waves are reflected.
Explanation:
Related Questions
Humans have developed ways to increase the carrying capacity of their environment. True or false
Answers
Answer:
false.nowadays humans are destroying forest,extracted more minerals,making pollution. in my view.
Select the correct answer. What happens when an electron absorbs energy? A. The electron moves from a lower energy orbital to a higher energy orbital. B. The electron falls into the nucleus. C. The electron moves from a higher energy orbital to a lower energy orbital. D. The electron loses its charge.
Answers
The electron absorbs energy from specific wavelength then moving from a lower energy orbital to a higher energy orbital.
Dana is reading about the best conditions for worm composting. Worm composting involves keeping worms in a bin with vegetable scraps from the kitchen along with other plant waste, and using the soil and drippings they produce to improve gardens. Dana decides to conduct an experiment to find the best conditions for worm composting. Which of the scenarios is the best way for Dana to conduct the scientific investigation?
Answers
Write a balanced net ionic equation.
Na3PO4(aq) + FeCl3(aq) = NaCl(aq) + FePO4(s)
Answers
Explanation:
Na3PO4+ FeCl3 = 3NaCl + FePO4
Hope it will help :)❤
The net ionic equation is found to be balanced by both mass and charge. There are equal masses of each element on the product and reactant sides in a balanced net ionic equation.
What is a net ionic equation?A chemical equation which shows only those elements, compounds, and ions which are directly involved in the chemical reaction is defined as the net ionic equation. The net ionic equation give us information about the ions that exists in aqueous medium.
A net ionic equation does not consider the spectator ions. The ions which do not participate in chemical reactions and are seen on both sides of the reactions are called spectator ions.
The complete ionic equation for the given reaction is:
3Na⁺ (aq) + PO₄³⁻ (aq) + Fe³⁺ (aq) + 3Cl⁻ (aq) → 3Na⁺ (aq) + 3Cl⁻ (aq) + FePO₄ (s)
The net ionic equation is:
PO₄³⁻ (aq) + Fe³⁺ (aq) → FePO₄ (s)
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When circumstances are right, most materials undergo a process called thermal expansion. Which statement best describes the cause and effect of thermal expansion? Group of answer choices Matter is heated, and its particles spread out more. Matter is heated, and its particles move closer together. Matter is cooled, and its particles move closer together. Matter is cooled, and its particles spread out more.
Answers
Answer: Matter is heated, and its particles spread out more
Explanation:
Thermal expansion occurs when there's an expansion of an object or material or when an object becomes bigger because of a rise in its temperature. This brings about the faster movement of the heated molecules and the atoms spreading out.
Therefore, the cause and effect of thermal expansion will be that when matter is heated, and its particles spread out more.
A pharmacist quizzes a pharmacy intern on the aliquot method in the preparation of 12 capsules each to contain 80 mg of morphine sulfate and 3.2 mg of naltrexone hydrochloride. Lactose is to be used as a diluent, a prescription balance with a sensitivity of 6 mg is proposed, and a 4% error is acceptable. Provide the relevant calculations.
Answers
To prepare 12 capsules each containing 80 mg of morphine sulfate and 3.2 mg of naltrexone hydrochloride, the following calculations can be used:
Calculate the total weight of the morphine sulfate and naltrexone hydrochloride: 80 mg + 3.2 mg = 83.2 mg
Calculate the weight of the diluent required: 12 capsules * 83.2 mg/capsule = 999.6 mg
Calculate the volume of the diluent required based on its density (assume a density of 0.9 g/mL for lactose): 999.6 mg / (0.9 g/mL) = 1.11 mL
Calculate the weight of the diluent required based on its volume: 1.11 mL * 0.9 g/mL = 1 g
Calculate the amount of the diluent required based on the sensitivity of the prescription balance: 1 g / (6 mg/g) = 166.7 mg
The amount of the diluent required according to this calculation is 166.7 mg. This amount should be rounded up to the nearest whole number (167 mg) to account for the 4% error tolerance. The final aliquot would therefore contain 167 mg of lactose, 80 mg of morphine sulfate, and 3.2 mg of naltrexone hydrochloride.
How is carbon dioxide intrduced into the atmosphere
Answers
smoke
Explanation:
carbon dioxide is introduced into the atmosphere by burning of fossil fuels and forests
What are the causes and consequences of climate change
Answers
Answer: Humans are increasingly influencing the climate and the earth's temperature by burning fossil fuels, cutting down forests and farming livestock.
Explanation: This adds enormous amounts of greenhouse gases to those naturally occurring in the atmosphere, increasing the greenhouse effect and global warming.
A mass of 6.005 g of carbon (atomic mass 12.010 amu) contains...? ty in advance
Answers
The mass of 6.005 g of carbon contains approximately 3.011 x 10²³ carbon atoms.
How much mass do six moles of carbon atoms have?We are aware that a mole is a grouping of 6.022 10²³ atoms. 6.0221023 carbon atoms make up a mole of carbon. As a result, we can estimate that 6.0221023 carbon atoms have a mass of 12 grammes.
There are: atoms of carbon in the sample.
The amount of carbon atoms in the sample may be determined using Avogadro's number (6.022 x 10²³ atoms per mole) and the molar mass of carbon (12.010 g/mol)
Number of moles of carbon = mass of carbon/molar mass of carbon
= 6.005 g / 12.010 g/mol
= 0.500 mol
Number of carbon atoms=number of moles of carbon x Avogadro's number
= 0.500 mol x 6.022 x 10²³ atoms/mol
= 3.011 x 10²³ atoms
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Calculate the molarity of a solution prepared by diluting 165 mL of
0.700 M calcium chloride to 900.0 mL.
Answers
Answer:
The product of transcription is RNA, which can be encountered in the form mRNA, tRNA or rRNA while the product of translation is a polypeptide amino acid chain, which forms a protein.
Explanation:
there are several objectives for the enzyme kinetics of papain experiment. the basics of enzyme kinetics will be explored using spectrophotometry. the use of a simple single beam spectrophotometry must be mastered. you will need to have a basic understanding of spectrophotometry and beer's law for this and experiment d. to gain familiarity with the spectrophotometer and the computer interface program (loggerpro) you will generate an absorbance verses wavelength (nm) plot to determine the wavelength absorbance maximum of p-nitro aniline, a colored product of the reaction used to monitor reaction rate. in the second part of the experiment you will determine the order of reaction for breaking the peptide like bonds in a substrate (bapna) that simulates a protein. papain is the enzyme that will be use to catalyze this reaction. the absorbance of a colored product (p-nitro aniline) will be monitored to generate absorbance versus time graphs to determine rate of reaction. two different concentrations of bapna will be tested. in the third part of this experiment each group will also be assigned a special condition to test the effect on the enzyme and reaction rate. class data will then be gathered and discussed before each student writes a mini report. please choose either t/f for each statement below:
Answers
The experiment uses spectrophotometry to explore the basics of enzyme kinetics.
What is spectrophotometry?Spectrophotometry is an analytical technique used to measure the amount of light absorbed or emitted by a sample. It is a powerful tool for measuring the concentration of a chemical solution, as well as the purity of a compound. Spectrophotometry utilizes a spectrophotometer, which is an instrument that measures the intensity of light as it passes through a sample. This instrument is used to measure the amount of light absorbed by the sample at different wavelengths.
T - The experiment uses spectrophotometry to explore the basics of enzyme kinetics.
T - You must have a basic understanding of spectrophotometry and Beer's Law for this experiment.
T - You will generate an absorbance versus wavelength (nm) plot to determine the wavelength absorbance maximum of p-nitro aniline.
T - The absorbance of p-nitro aniline will be monitored to generate absorbance versus time graphs to determine the rate of reaction.
F - The experiment will determine the order of reaction for breaking peptide bonds in a substrate.
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1.Predict what will happen to the color of the solution when you blow into the straw (causing the bromothymol blue water solution to bubble). Explain your prediction.
Answers
Explanation:
Bromothymol blue changes colour from blue to yellow due to the high carbon dioxide content being exhaled and dissolved in the solution.
draw the structure(s) of the branched ether(s) with the chemical formula c4h10o?
Answers
The structure of the branched ether of chemical formula c4h10o, is \(CH_3 - CH_2 - CH_2 - O - CH_2 - CH_2 - CH_3.\)
\(C_4H_{10} O\) is a branched ether, also known as an alkoxyalkane or a glycol ether. It is an organic compound composed of four carbon atoms, ten hydrogen atoms, and one oxygen atom. Its molecular formula is \(C_4H_{10} O\)and its molecular weight is 86.13 g/mol.
Its structure is linear, with a carbon backbone and an oxygen atom attached to two of the carbons in the chain. The oxygen atom is then connected to two methyl (\(CH_3\)) groups, one on each side of the central carbon atom.
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What are the possible values of 1 and m for
n=4 ?
Answers
Answer:
If n = 4, then the possible values of 1 and m depend on the equation or expression being used. Without more information, it is impossible to determine what the possible values of 1 and m might be. Can you please provide more context or information about the problem you are trying to solve?
100 POINTS!!!
What is the average rate of the reaction over the entire course of the reaction?
1.6 × 10−3 (?)
1.9 × 10−3 (?)
2.0 × 10−3 (X)
2.2 × 10−3 (X)
Answers
Answer:
b. 1.9 × 10-3
Explanation:
Answer:1.9x10-3
Explanation:
average
New substances, like synthetic materials, are formed as the result of
chemical reactions?
physical changes?
natural process in nature?
Answers
Answer:
chemical reactions
Explanation:
the synthetic substance is resulted from preparation of substance at laboratory
Answer:
chemical reactions
Explanation:
DONT DO A RANDOM ANSWER OR ILL REPORT, ILL GIVE BRAINLIEST AND ALOT OF POINTS IF YOU SAY THE CORRECT ONE!! students who enjoy completing worksheets with specific directions are likely to be what kind of thinkers?
Answers
1)Grignard reagent when reacted with methanol will yield A) ethanol (B) secondary alcohols (C) tertiary alcohols (D ropanol (E) primary alcohol
Answers
When the reaction of Grignard reagent reacted with methanol will yield a tertiary alcohol. Therefore, Option C tertiary alcohol is correct.
Contains a carbon-metal link, Grignard reagents are chemicals used in catalysis. They generally result from the anhydrous reaction of magnesium metal with an alkyl or aryl halide. Because of their high reactivity, Grignard reagents frequently act as nucleophiles in organic reactions.
An alkyl group from a Grignard reagent binds to the oxygen atom of methanol (CH3OH) when it interacts with the methanol, breaking the carbon-metal connection. A precursor alkoxide is created as a result. The equivalent alcohol is then produced by protonating the intermediate alkoxide.
The reaction of a Grignard reagent with methanol leads to the formation of a tertiary alcohol.
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What are the reactants and products of a redox reaction, neutralization reactions, and precipitation reactions?
Answers
Answer:
Precipitation reactions are ones in which at least one of the reactants is in the aqueous phase (i.e., dissolved in water), and a solid forms on the product side which was not present on the reactant side. If all the reactants are solid, then a solid product forming should not be called a precipitate. To be called a precipitate, an insoluble product must form from within solution, either from a solid and solute interacting, or from an interaction strictly between solutes.
Explanation:
What type of subatomic particles are found in the cloud?
A neutrons
B protons
C electrons
D croutons
Answers
Answer:
Electrons are particles that surround the nucleus of an atom like a cloud. As with protons and neutrons, electrons are essential to an atom's structure.
13. Use mole ratios to identify the limiting reagent in the following reaction: 3.10 mol of sodium mixes with 4.17 mol of water to form sodium hydroxide and hydrogen gas.
14. Determine the number of excess moles of the excess reagent in the following reaction: 4.80 mol of calcium mixing with 3.55 mol of oxygen gas, making calcium oxide.
Answers
13) The limiting reagent is water.
14) Oxyge is in excess by 1.15 mol
Limiting reagent13) According to the equation of the reaction:
\(2Na + 2H_2O --- > 2NaOH + H_2\)
The mole ratio of the reactants is 1:1.
But 3.10 mol of sodium and 4.17 mol of water were reacted. Thus, water is in excess while sodium is limiting.
14) \(2Ca + O_2 --- > 2CaO\)
Mole ratio of reactants = 2:1
4.80 mol Ca and 3.55 mol oxygen were reacted. Thus, oxygen is in excess.
Excess oxygen = 3.55 - 4.80/2 = 1.15 mol
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How many protons is in water
Answers
Answer:
water has 10 protons and 10 electrons
The center of gravity is the same for all passenger vehicles.
Answers
Answer:
yesdhiedjbrjdnrkrjddjdjjedWhat is the volume of a 1.25 M solution
if it contains 42 grams of sodium
hydroxide.
Volume NaOH = [?] mL
Answers
Answer:
You could calculate the answer given the formula
M = mol/L
you can get mol using g/MolarMass
=> 42g/22.99g/mol = 1.82688125mol
1.25M = 1.82688125mol/V
=> apply simple algebra
V = 1.4615 L
=> Notice that the answer requires the unit to be ml
V = 1.4615L * 1000ml/L = 1461.5ml
=> Notice that the given grams have 2 sig figs
V = 1500 ml
While baking cookies, chemical reactions involve granulated sugar (sucrose) and baking soda (sodium bicarbonate). Use dimensional analysis and the conversion factors below to convert to grams. Your answers should contain the correct number of significant figures.
1 cup granulated sugar = 7.05 oz
1 tsp baking soda = 0.212 oz
1 oz = 28.35 g
Convert 0.750 tsp of baking soda to grams. You must show your work to receive full credit.
Answers
The mass of the baking soda is 4.5 g
What is a conversion factor?A conversion factor is a ratio that is used to convert one unit of measurement to another. Conversion factors are commonly used in scientific calculations and in everyday life, when we need to convert one unit of measurement to another.
A conversion factor can be derived from the relationship between two different units of measurement.
Given that;
1 oz = 28.35 g
But
1 tsp = 0.212 oz
Thus;
0.750 tsp will be 0.750 tsp * 0.212 oz/1 tsp
= 0.159 oz
Then;
1 oz = 28.35 g
Thus;
0.159 oz = 0.159 oz * 28.35 g/ 1oz
= 4.5 g
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What is the final temperature after 840 Joules is absorbed by 10.0g of water at 25.0
C?
Answers
The final temperature of the water is: T_final = 45.0°C
We can use the formula for the specific heat capacity of the water to solve this problem:
q = mcΔT
First, we can calculate the initial energy of the water:
q = mcΔT
q = (10.0 g) (4.184 J/g°C) (25.0°C)
q = 1,046 J
Next, we can calculate the final temperature after absorbing 840 J:
q = mcΔT
840 J = (10.0 g) (4.184 J/g°C) (ΔT)
ΔT = 20.0°C
Therefore, the final temperature of the water is:
T_final = T_initial + ΔT
T_final = 25.0°C + 20.0°C
T_final = 45.0°C
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Which of these is an example of physical weathering?
1) Blowing away of lighter rock particles
2) Rock breaking up due to carbonic acid
3) Rock breaking up due to mechanical force
4) Settling down of rock particles in a new location
Answers
The answer is 3) Rock Breaking up due to mechanical force
Hope that help :)
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The density of silver is 10.5g/cm^3. What length of wire can be made with a silver block that has a mass of 102.4g. assumed the wire is perfectly cylindrical with the radius of 0.35mm. (v=πr^2h)
Answers
Answer:
The answer is
2.63 g
Explanation:
The mass of a substance when given the density and volume can be found by using the formula
mass = Density × volume
From the question
volume of silver = 0.25 cm³
density = 10.5 g/cm³
The mass is
mass = 10.5 × 0.25 = 2.625
We have the final answer as
2.63 g
Hope this helps you
Explanation:
PLS HELP.
What is the percent of sodium in sodium hydroxide?
%Na = 54.5 %
How many grams of sodium are there in 48.5 g of sodium hydroxide?
gr of Na in sodium hydroxide
Answers
Answer:
1. 57.5%
2. 27.89 g
Explanation:
1. Determination of the percentage of sodium in sodium hydroxide.
Molar mass of NaOH = 23 + 16 + 1 = 40 g/mol
Mass of Na in NaOH = 23 g
Percentage of Na = mass of Na / Molar mass of NaOH × 100
Percentage of Na = 23/40 × 100
Percentage of Na = 57.5%
2. Determination of the mass of sodium in 48.5 g of sodium hydroxide.
Molar mass of NaOH = 23 + 16 + 1 = 40 g/mol
Mass of Na in NaOH = 23 g
Total mass of NaOH = 48.5 g
Mass composition of Na = mass of Na / Molar mass of NaOH × Total mass
Mass composition of Na = 23/40 × 48.5
Mass composition of Na = 27.89 g
57.5% is the per cent of sodium in sodium hydroxide.
27.89 g of sodium are there in 48.5 g of sodium hydroxide.
What are moles?A mole is defined as 6.02214076 × \(10^{23}\)of some chemical unit, be it atoms, molecules, ions, or others. The mole is a convenient unit to use because of the great number of atoms, molecules, or others in any substance.
1. Determination of the percentage of sodium in sodium hydroxide.
Molar mass of NaOH = 23 + 16 + 1 = 40 g/mol
Mass of Na in NaOH = 23 g
Percentage of Na = mass of Na / Molar mass of NaOH × 100
Percentage of Na = 23/40 × 100
Percentage of Na = 57.5%
2. Determination of the mass of sodium in 48.5 g of sodium hydroxide.
Molar mass of NaOH = 23 + 16 + 1 = 40 g/mol
Mass of Na in NaOH = 23 g
The total mass of NaOH = 48.5 g
Mass composition of Na = mass of Na / Molar mass of NaOH × Total mass
Mass composition of Na = 23/40 × 48.5
Mass composition of Na = 27.89 g
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How to remove dye from effluent from azo dye factory
Answers
The removal of the azo dye can be achieved by the use of the adsorbents.
How do you remove the azo dye?We know that a dye could be one of the contaminants that could be seen to be present in an effluent stream. It is always very important that we should be able to remove the wastes that are part of a stream as this is going to make sure that we do not have the effluent filled with a contaminant.
The contaminant that is found in the stream can be able to be passed into the aquatic ecosystem and then it could be passed along food chain and this is going to cause a much larger damage to people that are living in a locality.
We can be able to remove the azo dye by the use of the adsorbents that would be able to take up the dye and such save the environment.
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