Answers
Answer:
Friston to energy
Explanation:
Friction to Energy as its a energy stooping the object form moving
Related Questions
Who were the terrorists that attacked the united states on September 11, 2001
Answers
niling Reactants
POSSIBLE POINTS: 4.55
6 K + Cr2S3 ----> 2 Cr + 3 KZS
A scientist combines 151 grams of potassium and 151 grams of chromium III sulfide, how many moles of chromium will be
made?
(The next question will ask about the limiting and excess reactants for this reaction)
O 11.6 g
O 0.377 g
O 1.29 g
O 1.51 g
Answers
To determine the density of an irregularly shaped object, a student immersed the object in 22.2 mL of water in a
graduated cylinder, causing the level of the water to rise to 37.8 ml. If the object had a mass of 22.4 g, what is the
density of the object?
Answers
Answer:
Explanation:
The density would be 4.
The melting of ice is considered a/an _______ because the ice absorbs heat from the surroundings.
Question 3 options:
A)
chemical reaction
B)
thermochemical process
C)
exothermic process
D)
endothermic process
Answers
Answer:
the correct answer is D
Explanation:
Basically, melting ice is an endothermic reaction because the ice absorbs (heat) energy, which causes a change to occur.
What is the difference between a homogenous mixture and a heterogenous mixture? Please also provide 5 examples
Answers
In a laboratory experiment a student found the pH of rain rain water sample to be 4.35 calculate H3O+ in the rainwater
Answers
The rainwater sample has a pH of 4.35, indicating that it is acidic. The concentration of \(H_3O^+\) ions in the sample is \(4.47 * 10^{-5} M\), which is higher than in neutral or basic solutions.
In a laboratory experiment, a student found the pH of a rainwater sample to be 4.35. In this context, the task is to calculate the concentration of hydronium ions (\(H_3O^+\)) in the given rainwater sample. The pH of the rainwater sample is an indication of how acidic it is. As per the pH scale, acidic solutions have a pH of less than 7. Since the pH of rainwater is acidic (pH = 4.35), it means that the concentration of \(H_3O^+\) ions is higher in the rainwater sample. To calculate the concentration of \(H_3O^+\) ions, we can use the following formula: pH = -log[\(H_3O^+\)], Where[\(H_3O^+\)] is the concentration of hydronium ions. By rearranging the above formula, we can get the concentration of \(H_3O^+\) ions as \([H_3O^+] = 10^{-pH}\). Substituting the given pH value of the rainwater sample in the above equation, we get\([H_3O^+] = 10^{-4.35} = 4.47 × 10^{-5} M.\)Therefore, the concentration of \(H_3O^+\) ions in the given rainwater sample is \(4.47 * 10^{-5} M.\)For more questions on acidic
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The molecular formula for glucose is C6H12O6. What would be the formula for a polymer made by linking ten glucose molecules together by dehydration reactions?
A
C20H120060
B
C60H100050
C
C60H102051
D C60H111051
Answers
The correct option is (a) i.e. C20H120O60. If the molecular formula for glucose is C6H12O6. C20H120O60 be the formula for a polymer made by linking ten glucose molecules together by dehydration reactions.
A chemical process known as dehydration reaction synthesis unites two smaller molecules by removing atoms from each of them. Based on the structure of hydrocarbons, aliphatic and aromatic organic substances can be further subdivided. Several chemical reactions involving organic molecules can result in the formation of new compounds with altered atom-bonding arrangements. Others just entail the displacement or substitution of atoms, while some chemical reactions result in the synthesis of molecules. Synthesis or combination reactions combine two chemicals to form a single molecule. For instance, when Mg and O2 are mixed, MgO is produced (magnesium oxide). "Dehydration reactions are chemical processes in which a water molecule is eliminated from the reactant molecule. The technique of mixing two chemicals while eliminating water molecules is known as dehydration synthesis. This is because "dehydration" is defined as "losing water," while "synthesis" is defined as "creating a new material." As a result, "dehydration synthesis" refers to the process of "losing water" while creating new chemicals.
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If there is sufficient fossil fuel , how will we cope ?
Answers
If there is sufficient fossil fuel, we will cope by utilizing it in a responsible and sustainable manner while actively transitioning towards alternative energy sources. Coping with the abundance of fossil fuels requires a multi-faceted approach that considers environmental, economic, and social aspects.
To cope effectively, we can:
1. Promote energy efficiency: Invest in technologies and practices that minimize energy waste and maximize efficiency in all sectors, including transportation, industries, and buildings.
2. Transition to renewable energy: Increase the adoption of renewable energy sources such as solar, wind, hydro, and geothermal power. This reduces our reliance on fossil fuels and mitigates environmental impacts.
3. Implement policy measures: Enact policies that incentivize the use of renewable energy, discourage excessive fossil fuel consumption, and promote sustainable practices.
4. Invest in research and development: Support and fund research efforts aimed at developing cleaner and more sustainable energy technologies, such as advanced battery storage, hydrogen fuel cells, and carbon capture and storage.
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Which of these properties is the best one to use for indentification of an element
Answers
Answer:
you need to state the options
A student mixes 43.8 mL of acetone (58.08 g/mol, 0.791 g/mL) with excess benzaldehyde and NaOH to produce 79.4 g of (1E,4E)-1,5-diphenylpenta-1,4-dien-3-one (234.29 g/mol). What is the percent yield of this student's experiment
Answers
Answer:
% yield of the student's experiment is
\(\frac{0.34}{0.60}\) ˣ 100 = 56.67%
Explanation:
given
volume of acetone= 43.8 mL
molar weight of acetone = 58.08 g/mol
density of acetone = 0.791 g/mL
A student mixes 43.8 mL of acetone (58.08 g/mol, 0.791 g/mL)
43.8 mL = 43.8mL × 0.791g/mL
= 34.6458g ≈34.65g
1 mole of acetone = 58.08g
∴34.65g = 34.65g/58.08g
= 0.60mol
molecular weight of the product 1,5-diphenylpenta-1,4-dien-3-one = 234.29 g/mol
mole = mass/ molar weight
mole = 79.4g/ 234.29g/mol
mole(n) = 0.3389mol ≈ 0.34mol
1 mole of acetone will produce 1 mole of the product
∴0.60mol of acetone will produce 0.60mol of the product
but we get 0.34mol of the product
∴ % yield of the student's experiment is
\(\frac{0.34}{0.60}\) ˣ 100 = 56.67%
A student completed a lab report. Which correctly describes the difference between the “Question” and “Hypothesis” sections of her report? “Question” states what she is asking, and “Hypothesis” states the result of her experiment. “Question” states what she is asking, and “Hypothesis” states what she thinks the answer to that question is in “if . . . then . . . because” format. “Question” describes what she is trying to find out, and "Hypothesis" states the procedures and methods of data collection. “Question” describes what she is trying to find out, and “Hypothesis” states any additional information or prior knowledge about the question.
Answers
The question in a investigation is the problem that we are asked to find and the hypothesis states what we thinks the answer to that question.
What is a scientific question?In a scientific experiment, the problem on which we work to solve or the question addressing an unknown thing is called a scientific question. The scientific question have to be precise and experientable.
A scientific hypothesis is a predictive statement describing the possible answer of the problem under study based on the observations and some previous scientific reports.
A hypothesis must be rectifiable, testable and falsifiable. We are checking whether our hypothesis is true or false through an experiment. Hence, second option is correct.
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HELPPP PLEASEE w/ all
Answers
The covalent bond is present in the compound C₃H₈. The reactant C is 3, product C is 6, reactant H is 8, product H is 10, Reactant O is 2, product O is 9.
What is covalent bond ?
Atoms share electron pair between them in covalent bonds. H-H or C-H are examples of nonpolar covalent bonds between atoms with similar or identical electronegativity, whereas polar covalent bonds are formed when unequal electronegativity is shared between atoms (e.g., H–O).
What is reactant ?
Raw materials known as reactants combine to create products. When the right factors, such as temperature, time, or pressure, come into play, the chemical bonds between the reactants are broken, allowing the atoms to form new bonds that lead to various combinations.
Therefore, covalent bond is present in the compound C₃H₈. The reactant C is 3, product C is 6, reactant H is 8, product H is 10, Reactant O is 2, product O is 9.
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Write the molecular equation for the reaction that occurs, if any, when solutions of the following substances are mixed: nitric acid and potassium carbonate. Make sure that you have properly identified all of the phases in your answer.
Answers
Answer:
The balanced molecular equation for the reaction is:
\(2HNO_{3_{(aq)} }\) + \(K_{2} CO_{3} _{(s)}\) → \(2KNO_{3} _{(s)}\) + \(H_{2} O_{(l)\) + \(CO_{2} _{(g)}\)↑
Explanation:
The weak nitric acid reacts with the strong potassium base to produce salt, water and carbon dioxide which is given off.
Molecular ratio of reactants is 2 : 1.
All phases are represented in the equation: aq for aqueous, l for liquid and g for gas (notice how they are written in subscript).
I hope this was helpful.
The best thermometer to use where temperatures drop below -39°C (-38.2°F) is:_______.
Answers
Answer:
The best thermometer to use for this temperature is the alcohol-in-a -glass thermometer.
Explanation:
The alcohol thermometer is a type of thermometer which uses ethanol as its thermometric liquid. This has some advantages at low temperatures because ethanol freezes at about −114.9 °C that is (−174.82 °F).
Due to its low freezing point, it can still function effectively as a thermometric liquid, expanding and contracting properly based on the applied heat, when dealing with temperature measurements that are at about -38.2°F.
Which equation represents an addition reaction?
Answers
Answer:
Reactions in which a multiple bond between two atoms becomes partly or fully saturated by covalent attachments... A typical addition reaction may be illustrated by the hydrochlorination of propene (an alkene), for which the equation is CH3CH = CH2 + HCl → CH3C+HCH3 + Cl− → CH3CHClCH3.
Explanation:
thank me later
CH3CH = CH2 + HCl → CH3C+HCH3 + Cl− → CH3CHClCH3.
This reaction is the example of addition reaction.
What is an addition reaction?An addition reaction is defined as a chemical reaction in which two or more molecules combine to produce a bigger molecule. This type of reaction is called addition reaction.
So we can conclude that the formation of bigger molecule is the example of addition reaction.
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Which of these compounds would you expect
to contain covalent bonds? Why?
a. KCI
b. PBr3
c. CIBr
d. Nal
Answers
Hope this helps you
pOH of the 0.001M NaOH solution is
Answers
The pOH of the 0.001 M NaOH solution is approximately 3.
To determine the pOH of a solution, we need to know the concentration of hydroxide ions (OH-) in the solution.
In the case of a 0.001 M NaOH solution, we can assume that all of the NaOH dissociates completely in water to form Na+ and OH- ions. Therefore, the concentration of hydroxide ions in the solution is also 0.001 M.
The pOH is calculated using the equation:
pOH = -log[OH-]
Substituting the concentration of hydroxide ions, we have:
pOH = -log(0.001)
Using a calculator, we can evaluate the logarithm:
pOH ≈ 3
Therefore, the pOH of the 0.001 M NaOH solution is approximately 3.
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50 PTS!!!!! Please answer without links!
What type of chemical reaction happens with Aerobic Cellular Respiration?
Synthesis, decomposition, single displacement, double displacement, or combustion.
Answers
calculate the mass of an atom of silver
Answers
Answer:
The Atomic mass of Silver is 107.8682u
Answer:
107.8682 u
Explanation:
Hope this will help
When zinc reacts with copper sulfate solution, zinc sulfate solution and copper are formed.(i) An experiment was carried out to measure the temperature change when zinc powder reactswith copper sulfate solution.initial temperature of copper sulfate solution = 20 °Cfinal temperature of mixture after the reaction = 46 °CExplain what the temperature readings show about the type of heat change that occurs duringthis reaction.
Answers
The temperature increase from 20 °C to 46 °C indicates that the reaction between zinc and copper sulfate solution is exothermic, with heat being released into the surroundings.
In the given reaction between zinc and copper sulfate solution, the temperature change can provide insights into the type of heat change occurring during the reaction. Based on the provided information, the initial temperature of the copper sulfate solution was 20 °C, and the final temperature of the mixture after the reaction was 46 °C.
The temperature increase observed in this reaction indicates an exothermic heat change. An exothermic reaction releases heat energy into the surroundings, resulting in a temperature rise. In this case, the reaction between zinc and copper sulfate solution is exothermic because the final temperature is higher than the initial temperature.
During the reaction, zinc displaces copper from copper sulfate to form zinc sulfate and copper metal. This displacement reaction is known as a single displacement or redox reaction. Zinc is more reactive than copper and therefore replaces copper in the compound.
The formation of new chemical bonds during the reaction releases energy in the form of heat. This energy is transferred to the surroundings, leading to an increase in temperature. The heat released is greater than the heat absorbed, resulting in a net increase in temperature.
The exothermic nature of this reaction can be explained by the difference in bond energies between the reactants and products. The breaking of bonds in the reactants requires energy input, while the formation of new bonds in the products releases energy.
In this case, the energy released during the formation of zinc sulfate and copper metal is greater than the energy required to break the bonds in copper sulfate and zinc.
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This number 4.188x10^22 particles —- 1cm^3 x particles —- 14.374cm^3 is about is about to number of silicon atoms and this number: 6.20x10^23 particles is about the expected number what are the similarities of the two numbers ?
Answers
1) List known values
Sample: 4.188*10^22 particles
Sample volume: 1 cm^3
Volume: 14.374 cm^3
List unknown values
Particles expected in a volume of 14.374 cm^3
2) Using conversion factor
\(\text{expectedParticles}=4.188\cdot10^{22}\frac{\text{particles}}{1cm^3}\cdot14.374\operatorname{cm}=\text{ 6.02}\cdot10^{23}\text{particles}\)3) Similarities between 4.188*10^22 and 6.020x10^23
Both numbers are written in scientific notation.
Both numbers have the same number of significant figures (four).
Both numbers tell the number of particles in a certain volume.
Which of the following would be more reactive than magnesium (Mg)?
A. Calcium (Ca)
B. Potassium (K)
C. Argon (Ar)
D. Beryllium (Be)
Answers
Answer:potassium is more reactive than Mg because both lie in the same group and the element potassium has more electropositivity than magnesium
Explanation:
I hope it will help you
Answer: B. Potassium(K)
Explanation:
write the structural formula for 2-bromo-3-chloro-4,4-dimethylpentanal
Answers
Answer:
Br-CH2-CH(CH3)2-C(Cl)H-CH(CH3)2-CHO
Explanation:
The molecule has a total of 14 carbon atoms, 13 hydrogen atoms, and 1 bromine atom. The carbon atoms are arranged in a chain with a methyl group attached to the second carbon atom, a chlorine atom attached to the third carbon atom, and two methyl groups attached to the fourth carbon atom. The fifth carbon atom has a carbonyl group attached to it.
The molecule is an aldehyde, which means that it has a carbonyl group (C=O) at the end of the chain. The carbonyl group is polar, and the oxygen atom has a partial negative charge. The hydrogen atom has a partial positive charge. This polarity makes the aldehyde group susceptible to nucleophilic attack.
The bromine and chlorine atoms are both electrophilic, which means that they have a partial positive charge. This makes them susceptible to nucleophilic attack.
The methyl groups are non-polar and do not have any significant reactivity.
The molecule is a chiral molecule, which means that it has a mirror image that is not superimposable on itself. This is because the carbon atom with the carbonyl group is attached to four different groups.
The molecule is a liquid at room temperature and has a strong odor. It is used in a variety of products, including perfumes, flavorings, and plastics.
A 0.750 M Ca(OH)2 solution was prepared by dissolving 48.0 grams of Ca(OH)2 in enough water. What is the total volume of the solution formed?
Answers
The total volume of the solution prepared by dissolving 48.0 grams of Ca(OH)₂ in enough water is 0.865 L
How do i determine the volume of the solution?First, we shall obtain the mole of 48.0 grams of Ca(OH)₂. This is shown below:
Mass of Ca(OH)₂ = 48.0 grams Molar mass of Ca(OH)₂ = 74 g/mol Mole of Ca(OH)₂ =?Mole = mass / molar mass
Mole of Ca(OH)₂ = 48 / 74
Mole of Ca(OH)₂ = 0.649 mole
Finally, we shall obtain the total volume of the Ca(OH)₂ solution. Details below:
Molarity of solution = 0.750 MMole of Ca(OH)₂ = 0.649 moleVolume of solution =?Volume = mole / molarity
Volume of solution = 0.649 / 0.750
Volume of solution = 0.865 L
Thus, we can conclude that the total volume of the solution is 0.865 L
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What are the free moving, charged particles in a molten mixture of aluminium oxide and cryolite?
Answers
Answer:
Ions.
Explanation:
Ions are the free moving, charged particles in a molten mixture of aluminum oxide and cryolite because the liquid state loosely held the molecules and the the molecules can easily move from one place to another. These ions helps in the conduction of electricity in the solution due to its free movement so we can say that ions are the charge particles that moves freely in the mixture of aluminum oxide and cryolite.
The free moving, charged particles in a molten mixture of aluminium oxide
and cryolite are known as Ions.
Ions are referred to an atom or compound which possesses an electrical
charge.The charge could be positive or negative and the positive ions are
called cations while the negative ions are referred to an anions.
Ions are usually free moving, take part in chemical reactions and help to
conduct electricity as a result of them being transferred from one point to
another.
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People living in some countries have a difficult time obtaining foods that are high in vitamin A. Which advantage of genetic technologies would these people most benefit from? O higher tolerance of crops to temperature changes O decreased crop resistance to disease O lowered cost of food production O increased nutritional value of crops hurry up asap
Answers
Answer:
the answer i believe is increased nutritional value of crops
Explanation:
Answer: increased nutritional value of crops
Explanation:) edge 2022
pls help I’ll give brainly
Answers
1. Explain how you would determine the enthalpy of reaction for the hypothetical reaction A2X4(l) + X2(g) → 2AX3(g) using the following information. You do not need to calculate an answer. Respond to the prompt with a minimum response length of 50 words.
Answers
we can determine the enthalpy of reaction for the hypothetical reaction A2X4(l) + X2(g) → 2AX3(g) using the following steps:
write the balanced chemical equation for the reactionwe obtain the standard enthalpies of formation for each compoundwe apply Hess's law calculate the enthalpy of reactionwe then add up the changes to get the total enthalpy change for the reaction State Hess law?Hess's Law of Constant Heat Summation states that regardless of the multiple stages or steps of a reaction, the total enthalpy change for the reaction is the sum of all changes.
The law is Hess's Law of Constant Heat Summation is described as a manifestation that enthalpy is a state function.
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What volume (in mL) of a 0.150 M solution of sodium hydroxide is needed to react
completely with 45 mL of a 0.250 M solution of H₂SO4?
2 NaOH(aq) + H₂SO4(aq) →→→ Na₂SO4(aq) + 2 H₂O(1)
O 5.6 mL
O 37.5 mL
O 150 mL
O22.5 mL
O 11.3 mL
Answers
Answer:
150 mL
Explanation:
Recall that
\(Molarity = \frac{moles}{volume}\)
Now, we are given a Molarity of 0.250 M H2SO4 with a volume of 45 mL. We will convert this to moles
\(mol = \frac{M}{L}\)
Then, since the mole ratio from H2SO4 to NAOH is 1:2, we will multiply by 2
Finally, we will get the volume by dividing by the Molarity of NaOH which is 0.150 M.
The setup for the answer is as follow
\((0.25 M H_2SO_4)(45 mL H_2SO_4)(\frac{2 mol NaOH}{1 mol H_2SO_4} )(\frac{1}{0.15MNaOH})\)
The final answer is 0.150 L or 150 mL.
light energy travels in
Answers
Light energy travels in the form of waves.