Rotation: Choose ALL that are TRUE (15 points for you, Sorry I can't find the answer to it..)
Question 2 options:
Earth spins on its axis and has no tilt.
A day on a planet is the time it takes the planet to complete one rotation on its axis
A year on a planet is the time it takes the planet to complete one rotation on its axis
Earth spins on its axis at a 23.5 degree tilt
Answers
A day is one rotation
A day on a planet is the time it takes the planet to complete one rotation on its axis and Earth spins on its axis at a 23.5 degree tilt are the true statements.
What is rotation?Rotation is a process in which any body show movement of 360 degree at their own place.
Earth do rotation at its own place all the time with little tilt position of 23.5 degree and due to this day and night occurs in the earth. And earth do revolution in 365 days around the sun in the orbital and due to this movement different seasons occur in the earth.
Hence, option (2) & (4) is correct, i.e. Earth spins on its axis at a 23.5 degree tilt and a day on a planet is the time it takes the planet to complete one rotation on its axis.
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Related Questions
Calcium chloride forms an ionic solid. How are the particles held together
and arranged in the solid?
A. Calcium chloride molecules are held together by covalent bonds in
a regular pattern.
B. Calcium and chloride atoms are held together by metallic bonds in
an irregular way.
C. Calcium chloride molecules are held together by intermolecular
attractions in an irregular way.
D. Calcium and chloride atoms are held together by electrostatic
forces in a regular pattern.
Answers
Answer: D. Calcium and chloride atoms are held together by electrostatic
forces in a regular pattern.
It is a solid, so the particles are held together in a regular way. Eliminate B and C.Also, there are no covalent bonds, so eliminate A.The particles of calcium and chloride atoms are held together by electrostatic forces in a regular pattern ,therefore option (d) is correct.
What do you mean by electrostatic force?Electrostatic forces are attractive or repulsive forces between particles that are caused by their electric charges.
The electrostatic bonding force is significant in chemistry because it bonds an ionic molecule.
The electrostatic force acts over a distance of about one-tenth the diameter of an atomic nucleus or 10⁻¹⁶ m.
The particles of calcium and chloride atoms are held together by electrostatic forces in a regular pattern ,hence option (d) is correct.
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The specific heat of copper is 0.385 J/gºC. A 95.0 g block of
copper is heated to 77.9°C and placed into a calorimeter that
a
contains 42.0 mL of water at 20.4°C. Assuming no heat loss,
what will be the final temperature of the copper and water?
Answers
The final temperature of the copper and water in the calorimeter given the data is 30.3 °C
Data obtained from the questionSpecific heat capacity of copper (C꜀) = 0.385 J/gºCMass of copper (M꜀) = 95 gTemperature of copper (T꜀) = 77.9 °C Mass of water (Mᵥᵥ) = 42 mL = 1 × 42 = 42 gTemperature of water (Tᵥᵥ) = 20.4 °CSpecific heat capacity of the water (Cᵥᵥ) = 4.184 J/gºC Equilibrium temperature (Tₑ) =? How to determine the equilibrium temperatureHeat loss = Heat gain
MᵥᵥC(Tᵥᵥ – Tₑ) = M꜀C(Tₑ – M꜀)
95 × 0.385 (77.9 – Tₑ) = 42 × 4.184(Tₑ – 20.4)
36.575(77.9 – Tₑ) = 175.728(Tₑ – 20.4)
Clear bracket
2849.1925 – 36.575Tₑ = 175.728Tₑ – 3584.8512
Collect like terms
2849.1925 + 3584.8512 = 175.728Tₑ + 36.575Tₑ
6434.0437 = 212.303Tₑ
Divide both side by 212.303
Tₑ = 6434.0437 / 212.303
Tₑ = 30.3 °C
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What is the concentration (molarity) of a solution of NaCl if 350. mL of a 2.5 M NaCl solution is diluted to a total volume of 5.0 mL? (NEED HELP ASAP)
Answers
The concentration (molarity) of the final NaCl solution is 175 M.
To find the concentration (molarity) of the final NaCl solution, we can use the equation:
M1V1 = M2V2
Where M1 is the initial concentration, V1 is the initial volume, M2 is the final concentration, and V2 is the final volume.
In this case, we have an initial NaCl solution with a concentration of 2.5 M and a volume of 350 mL (0.350 L). We are diluting this solution to a total volume of 5.0 mL (0.005 L).
Plugging these values into the equation, we have:
(2.5 M) * (0.350 L) = M2 * (0.005 L)
Simplifying the equation:
0.875 = 0.005 * M2
Dividing both sides by 0.005:
M2 = 0.875 / 0.005
M2 = 175M
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Please tell me the reagent
Answers
Alkene is transformed to alcohol via the oxymercuration-demercuration reaction. The reagent employed in this reaction is mercury (II) acetate in tetrahydrofuran, which also serves as the solvent.
Oxymercuation-demercuration The result of 2-methyl-2-butene oxymercuration-demercuration is 2-methyl-2-butanol.Oxymercuration-demercuration is the electrophilic activation of an alkene by a mercuric acetate group. It is then followed by the addition of water and, finally, reductive demercuration by sodium borohydride.In the first step, an electrophilic HgOAc+ ion is added to the double bond, yielding mercurinium ion.In the second stage, the species combines with a nucleophilic water molecule. A bonding of a HgOAc group and an OH group arises on the nearby carbon atoms as a result of this nucleophilic attack.The final product involves the Markovnikov addition reaction.For more information on Oxymercuation-demercuration kindly visit to
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What is the definition of energy (in scientific terms)?
A. The motion of an object
B. The ability to do work
C. A force used on an object
D. A change in temperature
Answers
B. The ability to do work
Explanation:
Scientists define energy as the ability to do work. There is potential energy (where an object at rest has the capacity to have motion) and kinetic energy (where an object is in motion).
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A hawk swoops down and catches a squirrel. The squirrel provides energy for the hawk. What happens to the rest of the matter?
Answers
Answer:
The rest of the food molecule is converted to other carbon molecules. The hawk cannot consume all the parts of the squirrel. It will feed as a carnivore on the fleshy part of its prey. The matter is converted to other carbon molecules
Explanation:
Which electron configuration represents a transition element?
01s²2s²2p³
01522s22p635²
1s²2s²2p63s²3p64s²3d7
1s22s22p63s23p64s²3d¹04p4
Answers
The electronic configuration which represents a transition element is 1s²2s²2p⁶3s²3p⁶4s²3d⁷
What is a transition element?Transition elements are placed between the metallic S-block elements and nonmetallic P-block elements in the periodic table. They are D-block elements and have features similar to both metals and nonmetals, to some extent. This is why they are called transition elements.
One remarkable feature of these elements happens during the addition of electrons to them. Contrary to S and P-block elements, electrons are added to the penultimate shell, not the last shell. These elements often feature partially filled d-orbitals and have multiple oxidation states.
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how is matter described?
Answers
Answer:Matter is defined as anything that has mass and takes up space (it has volume). ... Volume is the amount of space something occupies. Words such as big, little, long, or short are used to describe volumes.
Explanation:
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help pls will give brainliest Tell me in order of across boxes
Answers
The complete form of the table is:
pH | [H₂O¹⁺] | pOH | [OH¹⁻] | ACID or BASE?3.78 | 1.58 x 10⁻⁴ M | 10.22 | 6.31 x 10⁻¹¹ M | Acid11.22 | 3.89 x 10⁻⁴ M | 2.78 | 2.03 x 10⁻¹¹ M | Base8.81 | 1.58 x 10⁻⁹ M | 5.19 | 1.84 x 10⁻⁶ M | Base5.12 | 8.91 x 10⁻¹⁰ M | 8.88 | 1.12 x 10⁻⁵ M | AcidHow to determine pH?1. For pH = 3.78:
[H₂O¹⁺] can be calculated using the formula [H₂O¹⁺] = 10^(-pH).
[H₂O¹⁺] = 10^(-3.78) = 1.58 x 10⁻⁴ M.
To find pOH, use the equation pOH = 14 - pH.
pOH = 14 - 3.78 = 10.22.
Since the concentration of [OH¹⁻] can be obtained by using the relation [OH¹⁻] = 10^(-pOH).
[OH¹⁻] = 10^(-10.22) = 6.31 x 10⁻¹¹ M.
Based on the pH value, this solution is acidic.
2. For [H₂O¹⁺] = 3.89 x 10⁻⁴ M:
Given the concentration of [H₂O¹⁺], calculate the pH.
pH can be determined using the equation pH = -log[H₂O¹⁺].
pH = -log(3.89 x 10⁻⁴) ≈ 11.22.
The pOH can be calculated using the equation pOH = 14 - pH.
pOH = 14 - 11.22 ≈ 2.78.
Since the concentration of [OH¹⁻] is related to pOH as [OH¹⁻] = 10^(-pOH).
[OH¹⁻] = 10^(-2.78) ≈ 2.03 x 10⁻¹¹ M.
Based on the pH value, this solution is basic.
3. For pOH = 5.19:
To calculate the concentration of [OH¹⁻], use the relation [OH¹⁻] = 10^(-pOH).
[OH¹⁻] = 10^(-5.19) ≈ 6.05 x 10⁻⁶ M.
To find the pH, we can use the equation pH = 14 - pOH.
pH = 14 - 5.19 ≈ 8.81.
Since the pH is greater than 7, this solution is basic.
4. For [OH¹⁻] = 4.88 x 10⁻¹⁰ M:
Given the concentration of [OH¹⁻], calculate the pOH.
pOH = -log[OH¹⁻].
pOH = -log(4.88 x 10⁻¹⁰) ≈ 9.31.
To find the pH, use the equation pH = 14 - pOH.
pH = 14 - 9.31 ≈ 4.69.
Since the pH is less than 7, this solution is acidic.
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Part 1(Picture 1):
Peptides isolated from rapeseed that may lower blood pressure have the following sequence of amino acids.
Part A
At physiological pH the N-terminus of an amino acid exists as the ammonium ion, and the C-terminus exists as the carboxylation ion.
Draw the structure of Arg-Ile-Tyr.
Draw the molecule on the canvas by choosing buttons from the Tools (for bonds and charges), Atoms, and Templates toolbars, including charges where needed.
Part 2(Picture 2):
Part A
What are the amino acids in the peptide?
Spell out the full names of the compounds. Enter your answers separated by a comma.
Part B
How would you name the dipeptide in the peptide?
Spell out the full name of the compound.
Answers
The structure of Arg-Ile-Tyr is given below:
What are Peptides?Peptides make up short chains of amino acids, which act as the fundamental units for building proteins. Within these chains, peptides usually consist of no more than 50 amino acids in contrast to proteins that are made up of significantly longer structures.
Found throughout various sources such as plants, animals, and bacteria, peptides play crucial roles in multiple biological processes including signaling, enzyme activity, and immune response.
Additionally, artificially synthesized peptides serve several purposes within the medicine, cosmetics, and food industries. Scientists are also exploring certain peptide's potential therapeutic advantages mainly pertaining to anti-inflammatory, antimicrobial, and anticancer activities.
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What is the balanced chemical
reaction for the synthesis of
carbon with hydrogen?
Answers
The balanced chemical reaction for the synthesis of carbon with hydrogen is CH₄ = C + 2H₂
Balanced chemical equation explainedBalance chemical equation refers to chemical reactions in which the moles and atoms on both the reactant side and product side are the same.
It is a way of balancing chemical equation in which the atoms of each chemicals on the product and reactant are the same.
The balanced chemical reaction for the synthesis of carbon with hydrogen is CH₄ = C + 2H₂
In this reaction, one molecule of methane is formed by combining one atom of carbon with two molecules of hydrogen gas.
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The data in the table below represents the pressure of the gas as the temperature changes. Plot a graph of this data, using the blank graph provided below. Draw a trend line and calculate its slope. How are the variables related? What will the pressure of the gas be at 0°C?
Answers
Answer: A
Explanation:
how do one get this solution
-log10 (2* 10^-2)
Answers
The result of the computation when you follow the steps is 1.699.
A logarithm is a mathematical function that represents the exponent or power to which a specific base must be raised to obtain a given number. In simpler terms, it answers the question: "To what power must we raise a base number to obtain a certain value?"
What you should do is that on your calculator, you could press the logarithm key and then put in the value that has been shown and then the result would be displayed on your calculator.
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An aqueous potassium carbonate solution is made by dissolving 7.32 moles of K2CO3 in sufficient water so that the final volume of the solution is 4.80 L . Calculate the molarity of the K2CO3 solution.
Answers
According to the concept of molar concentration, molarity of the solution is 1.525 M.
What is molar concentration?Molar concentration is defined as a measure by which concentration of chemical substances present in a solution are determined. It is defined in particular reference to solute concentration in a solution . Most commonly used unit for molar concentration is moles/liter.
The molar concentration depends on change in volume of the solution which is mainly due to thermal expansion. Molar concentration is calculated by the formula, molar concentration=mass/ molar mass ×1/volume of solution in liters.
In terms of moles, it's formula is given as molar concentration= number of moles /volume of solution in liters.
In the given problem, by substituting values in mentioned formula related to moles we get,7.32/4.80=1.525 M.
Thus , the molarity of solution is 1.525 M.
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Reflect on the learning activities titled “Hypothesis”, “Variables and Hypothesis” and “Constructing a Hypothesis”. Describe some similarities and differences between a question that comes in response to an observation, and a scientific research question? Cite quotes from the readings to support your answer. Where do variables fit into this thinking? In other words, if you imagine a number line with observation questions at one end and scientific research questions at the other, what role do variables play anywhere along this continuum?
Answers
The learning activities titled "Hypothesis," "Variables and Hypothesis," and "Constructing a Hypothesis" all share certain similarities and differences. A question that arises in response to an observation is similar to a scientific research question in that both require some level of investigation to achieve an answer. However, scientific research questions are typically more specific and refined, with a defined methodology for obtaining data and verifying results.
The following quotes from the readings illustrate this distinction:"A scientific question is one that can be answered by using scientific investigation. In contrast, an observation question is one that comes in response to observing or experiencing something in the natural world" (Scientific Inquiry: Variables, Hypotheses, and the Scientific Method)."An important feature of a scientific question is that it should be answerable within a reasonable amount of time and with the resources available" (Scientific Inquiry: Variables, Hypotheses, and the Scientific Method)."Research questions can be narrow or broad, depending on the scope of the research" (Constructing a Hypothesis).The concept of variables is crucial to both observation and scientific research questions, but they play different roles depending on where they fall on the continuum. Observation questions are usually less precise and may not require much consideration of variables. On the other hand, scientific research questions are likely to include a rigorous examination of variables and their potential effects."Variables are an essential part of a scientific experiment. They are the things that change in an experiment" (Scientific Inquiry: Variables, Hypotheses, and the Scientific Method)."Variables are important because they can affect the outcome of the research" (Constructing a Hypothesis).In summary, observation questions and scientific research questions share some similarities, but the latter is more specific, has a defined methodology, and may require more consideration of variables.For such more question on Hypothesis
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an alkene reacts with a strong protic acid to form a carbocation. in part 1 draw the curved arrow notation for the reaction between an alkene and hcl. however, an alkene will react with a halogen electrophile to form a cyclic intermediate. in part 2 draw the curved arrow notation for the reaction between an alkene and cl2.
Answers
When 1-propene and HBr are combined in the first reaction, an ionic mechanism drives the production of 2-bromo propane. When 1-propene and a bromine molecule interact for the second time.
Are bases and alkenes compatible?Most often, molecules with excellent leaving groups connected to sp3 carbons are eliminated processes to produce alkenes. Examples of these reactions are the dehydrohalogenations with strong bases and the alcohol dehydrations catalyzed by acids.
How do alkenes typically respond?Although alkenes can react in many different ways, electrophilic addition reactions are by far the most frequent. In an addition reaction, two smaller molecules are combined to form one larger molecule.
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The following is an example of a renewable source of energy
OA.
coal
OB. hydroelectricity
OC.
nuclear energy
OD
petroleum
Reset
Answers
Answer:
OB. Hydroelectricity
Explanation:
Because hydroelectricity is the process where electricity is generated by a motor being rotated by the force or current of water, and according to the laws of the water cycle, water is goes back to where it once was which leads us to conclude that hydroelectricity is a renewable source of energy.
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Ge(NO2)2 whats the name of this formula?
Answers
Answer:
Germanium monoxide
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What volume of CO2(g), measured at STP is produced if 15.2 grams of CaCO(s) is heated?
Answers
Answer:
Volume = 3.4 L
Explanation:
In order to calculate the volume of CO₂ produced when 15.2 g of CaCO₃ is heated, we need to first write out the balanced equation of the thermal decomposition of CaCO₃:
CaCO₃ (s) + [Heat] ⇒ CaO (s) + CO₂ (g)
Now, let's calculate the number of moles in 15.2 g CaCO₃:
mole no. = \(\mathrm{\frac{mass}{molar \ mass}}\)
= \(\frac{15.2}{40.1 + 12 + (16 \times 3)}\)
= 0.1518 moles
From the balanced equation above, we can see that the stoichiometric molar ratios of CaCO₃ and CO₂ are equal. Therefore, the number of moles of CO₂ produced is also 0.1518 moles.
Hence, from the formula for the number of moles of a gas, we can calculate the volume of CO₂:
mole no. = \(\mathrm{\frac{Volume \ in \ L}{22.4}}\)
⇒ \(0.1518 = \mathrm{\frac{Volume}{22.4}}\)
⇒ Volume = 0.1518 × 22.4
= 3.4 L
Therefore, if 15.2 g of CaCO₃ is heated, 3.4 L of CO₂ is produced at STP.
In some parts of the galaxy, electrons in hot hydrogen gas may be excited to very high quantum levels. Calculate the wavelength of light that would be emitted if electrons moved from the =20 shell to the =2 shell.
Answers
1.What happens when non-metals react with oxygen? (1 Point)
a) Metal oxides are formed.
b) Basic oxides are formed.
c) Acidic oxides are formed
Answers
Answer:
c)
Explanation:
acidic oxides are formed
metal oxides and basic oxides are basically the same.
Determine the freezing point of 0.125 kg of H2O with 13.64 g of C2H5OH with a kf of 1.86 °C/m.
A: 4.40 °C
B: -4.40 °C
C: 2.33 °C
D: -2.33 °C
E: 0.0 °C
Answers
C: 2.33 °C the freezing point of 0.125 kg of H2O with 13.64 g of C2H5OH with a kf of 1.86 °C/m.
What is freezing point ?Freezing-point When a lesser quantity of another, non-volatile substance is introduced, the lowest temperature at which a substance freezes drops. Adding salt to water (used in ice cream makers and to de-ice roads), alcohol in water, ethylene or propylene glycol in water (used in car antifreeze), adding copper to molten silver (used to make solder that flows at a lower temperature than the silver pieces being joined), or mixing two solids such as impurities into a finely powdered drug are some examples.
In all instances, the substance added/present in smaller quantities is referred to as the solute, while the initial substance present in greater quantities is referred to as the solvent.
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what is the photoelctric effect?
Answers
Explanation:
It is the emission of electron from a metal under the effect of light is known as photo electric effect
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What is paper made of?
Answers
Paper used as a writing material is made of pulp (wood).
What is paper?Paper is a sheet material used for writing on or printing on (or as a non-waterproof container), usually made by draining cellulose fibres from a suspension in water.
Paper is made from cellulose found in trees, which are the main source of cellulose fibre (or woodpulp). Besides woodpulp, paper can be made from other materials such as cotton, flax, esparto, straw, hemp, manilla and jute.
Wood pulp is usually a softwood, used for pulping to make paper.
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When all the soil pores are essentially water-filled, flow is termed _______________ .
Unsaturated
Saturated
Gravitional
Rapid
Answers
You have 109 g of benzene (C6H6). The density of benzene is 0.879 g/mL. What is the volume of benzene (in mL)?
Answers
The volume of the benzene, given that it has a mass of 109 g and a density of 0.879 g/mL is 124 mL
How do I determine the volume of the benzene?Density of a substance is defined as follow:
Density = mass / volume
Cross multiply
Density × volume = mass
Divide both sides by density
Volume = mass / density
With the above formula, we can obtain the volume of the benzene. Details below:
Mass of benzene = 609 gramsDensity of benzene = 0.879 g/cm³ Volume of benzene = ?Volume = mass / density
Volume = 109 / 0.879
Volume = 124 mL
Thus, we can conclude that the volume of the benzene is 124 mL
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What happens to the amount of solution when we add food colour to it?
Answers
Answer:
We need more? What else is in the question? This is unanswerable.
Explanation:
What does electronegativity mean?
Answers
Answer:
Electronegativity refers to the ability of an atom to attract shared electrons in a covalent bond. The higher the value of the electronegativity, the more strongly that element attracts the shared electrons.
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Use the process of photosynthesis and cellular respiration to describe why the drought has driven the bears into the towns.
Answers
The process of photosynthesis and cellular respiration is usually at the barest minimum when drought occurs.
What is Photosynthesis?This is the process in which green plants manufacture their food through the presence of light energy from the Sun.
During drought, there is no water which reduces photosynthetic activity of plants. This leads to shortage of food thereby making bears to come into town in search of food.
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Define exothermic and endothermic. What are the mathematical signs of the internal energy and enthalpy when a process is exothermic?
Answers
Exothermic refers to chemical interactions that aerobic respiration. Combustion reactions release higher energy. Endothermic refers to atoms and molecules that either use or absorb reactive power.
What is an exothermic explanation?A chemical process known as an endothermic releases energy as heat or light. It is an endothermic reaction's opposite. Chemical equation expressed as reactants + products + energy. An reaction mechanism is one in which electricity is given off as light or warmth.
Exothermic example: What is it?A response is deemed to be exothermic if it produces heat while also undergoing a net decrease in basic enthalpy change. Samples include those type of combustion, iron rust, including water froze. Exothermic processes are those that discharge heat and energy into the surroundings.
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