12. Which of these elements would most likely be a shiny, gray-colored
solid at room temperature, conduct electricity, and dent when hit with a
hammer? *
Answers
Answer:
Metal.
Explanation:
If there are more specific options choose the one that is classified as a metal on the periodic table :)
The grey-colored shiny element that conducts electricity has been Aluminum metal.
The periodic table has been consisted of metals, metalloids, and nonmetals.
The metals have the properties of conducting electricity, as well as they are the shiny compound that existed to be solid at room temperature. The metals have been lustrous and ductile and malleable.
Thus. metals have been the compound that has been dented with the hammer, conducts electricity, and is shiny. The grey-colored metal has been Aluminum.
Thus, the grey-colored shiny element that conducts electricity has been Aluminum metal.
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Related Questions
A 1,600-milliliter bucket of paint is at a temperature of 70°F. Then the paint is divided equally into four smaller buckets. Each bucket is at 70°F before the paint is poured. The temperature of each bucket is about _____ the temperature of the original bucket of paint. a. The same as b.Four times c.One-fourth
Answers
Answer:
Same.
Explanation:
The temperature of each 400mL bucket is about the same as the temperature of the original bucket of paint.
This is because the temperature is an intrinsic property.This means that temperature is independent of the quantity of matter. Therefore, the temperature of paint inside the bucket is not dependent on the amount of paint present.
How many coulombs of charge are required to cause reduction of 0.20 mole of Cr3+ to Cr?
A) 0.60 C
B) 3.0 C
C) 2.9
Answers
Faraday's constant is approximately equal to 96,485 coulombs/mol.
The reduction of one mole of Cr3+ to Cr requires the gain of three moles of electrons (Cr3+ + 3e- → Cr).
Therefore, the reduction of 0.20 mole of Cr3+ to Cr will require the gain of 0.60 moles of electrons (0.20 mol Cr3+ x 3 mol e-/mol Cr3+ = 0.60 mol e-).
Multiplying the number of moles of electrons by Faraday's constant gives us the total charge required:
0.60 mol e- x 96,485 C/mol = 57,891 C
Therefore, the answer is A) 0.60 C.So, the reduction of 0.20 mole of Cr3+ to Cr would require:0.20 moles of Cr3+ × 3 moles of e-/mol of Cr3+ = 0.60 moles of electrons One mole of electrons carries a charge of 96,485 Coulombs (C).
Therefore, 0.60 moles of electrons would carry a charge of: 0.60 moles of e- × 96,485 C/mol of e- = 58,091 C Therefore, the amount of charge required to cause the reduction of 0.20 mole of Cr3+ to Cr is approximately 58,091 Coulombs (C).
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Iron has a density of 7. 86 g/cm3 (1 cm3=1 mL). Calculate the volume (in dL) of a piece of iron having a mass of 4. 18 kg. Note that the density is provided in different units of volume and mass than the desired units of volume (dL) and the given units of mass (kg). You will need to express the density in kg/dL (1 cm3 = 1 mL) before calculating the volume for the piece of iron
Answers
510.17 centimetres cube is the volume of iron has a density of 7.86 gram per centimetres cube ( 1 centimetre cube = 1ml) and has a mass of 4.01 kg.
Density is the amount of mass of a substance present per volume of the cubic centimetre and it is the ratio of mass of a substance to the volume of the substance with a unit centimetre cube.
The iron has a density of 7.86 gram per centimetres cube and mass of 4.01 kg so,
mass in grams= \(\frac{4.01}{1000} = 0.0041g.\\Density= \frac{mass}{volume}\)
Substituting the values in the equation, we get:-
volume= \(\frac{0.0041}{7.86} = 510.17 cm^{3} .\)
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Can someone explain this please?
What are sound waves?
Answers
Answer:
A wave of compression and rarefaction, by which sound is propagated in an elastic medium such as air
Explanation:
Sound waves are often simplified to a description in terms of sinusoidal plane waves which are characterized
similar scientific themes are seen in what areas of science?
A. only in areas dealing with living things
B. in all areas of science
C. only in areas dealing with tinny particles
D. only in areas dealing with things on Earth
Answers
Answer:B
Explanation:
In 3-5 sentences, describe similarities between motors and generators in terms of how they are made and how they convert energy.
Answers
Which of these is important to gathering and interpreting scientific
information?
A. Logic
B. Religion
C. Legend
D. Emotion
Answers
Answer:
A.) Logic should be your answer.
Hope this helps! :)
What is the density of 37.72 of material whose volume is 6.80cm
Answers
Answer: Density is mass per unit volume. You have supplied both measurements, so simply take the quotient.
Explanation: Density, p,=37.72⋅g6.80⋅cm3=??g⋅cm−3
Pedro is baking a cake for his experiment on chemical changes. He knows a chemical change will occur when he puts the cake mixture in the oven. He would like to know what will happen when the cake is removed from the oven. What prediction would you make for Pedro's experiment? A. The chemical changes occurred because the chemicals changed. B. The chemical changes occurred because there was a change in light energy. C. The fruit and the hamburgers were affected by an increase in heat energy. D.The fruit and the hamburgers were affected by a decrease in heat energy.
Answers
Answer:
A. The chemical changes occurred because the chemicals changed.
Explanation:
When baking a cake several chemical reactions occur that change the chemical composition of the ingredients used in baking. An ingredient like baking powder releases carbon dioxide when it undergoes a temperature change in the oven. A chemical change is supposed to change the form of a substance.
An endothermic reaction also occurs when the ingredients absorb heat energy to produce several changes. The firmness of the cake occurs because of the heat absorbed by the proteinous content of the egg.
Identify the spectator ions in this reaction. Check all that apply.
H+ + CN + Li+ + OH → Lit + CN + H₂O
он+
O CN-
O Lit
OH-
H₂O
Answers
Answer:
The spectator ions are CN- and Li+
Explanation:
Spectator ions are ions in a chemical equation that don't participate in the reaction. To identify these ions you have to look for which ions are on both sides of the chemical equation.
In this chemical equation Li+ and CN- are on both sides of the equation making them spectator ions.
Name the elements in period 2 that are non metals.
Answers
Answer:
nitrogen, oxygen, fluorine, and neon
Explanation:
:)
Write a chemical formula for this molecule.
Answers
Answer:
CO2
Explanation:
we can see one carbon atom and 2 oxygens meaning this is Carbon dioxide or CO2
Ariana is playing basketball with her friends. They are using an orange basketball. Why does her basketball look orange?
All visible light waves except orange are absorbed by the ball.
Only orange light waves are absorbed by the ball.
All visible light waves except orange are reflected by the ball
Only orange light waves reach the surface of the ball.
Answers
Ariana is playing basketball with her friends. They are using an orange basketball. Because all visible light waves except orange are absorbed by the ball.
The correct answer is A.
The color of an object is determined by the wavelengths of light that it reflects or absorbs.In the case of Ariana's basketball, it appears orange because it reflects orange light while absorbing other colors. When white light (which contains all visible colors) shines on the basketball, the orange light waves are reflected back to our eyes, while the other colors are absorbed by the ball. This selective absorption and reflection of light by the ball's surface result in us perceiving the basketball as orange in color.The correct answer is A.
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CsH16 +12028CO2 +8H₂O
What is the ratio of octene (C8H16) to
oxygen in the reaction?
Answers
The ratio of octene to oxygen is 1:12.
To determine the ratio of octene (C8H16) to oxygen (O2) in the given reaction, we need to examine the balanced chemical equation. However, the equation you provided does not seem to be balanced. The coefficients for each compound must be determined to achieve a balanced equation before we can calculate the desired ratio.
Assuming you meant the combustion reaction of octene, a balanced equation would be:
C8H16 + 12O2 → 8CO2 + 8H2O
From the balanced equation, we can see that for every 1 mole of octene (C8H16), we require 12 moles of oxygen (O2) to completely react.
This means that for every 1 mole of octene, we need 12 moles of oxygen to fully combust the octene and produce the corresponding amounts of carbon dioxide (CO2) and water (H2O) as shown in the balanced equation.
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How many grams are in 0.75 moles of Fe
Answers
Answer:
41.88375 g Fe
Explanation:
Using stoichiometry, we can do this problem. First, we put our given. Then we create an equation using the molar mass of Fe (found on the periodic table, which was 55.845 g Fe), and the resulting equation is:
\(0.75 mol Fe * \frac{55.845 g Fe}{1 mol Fe}\)
The mol Fe's cancel, and leave us with:
41.88375 g Fe
Good luck.
Which of the following has the potential to change the equilibrium in a reaction involving gases? Select all that apply. - decreasing the volume of the system to half of its original value - increasing the volume of the system to twice its original value - doubling the amount of one of the components in the system - doubling the amount of all of the components in the system
Answers
The following has the potential to change the equilibrium in a reaction involving gases: decreasing the volume of the system to half of its original value, increasing the volume of the system to twice its original value, doubling the amount of one of the components in the system, and doubling the amount of all of the components in the system.
In chemical reactions involving gases, the concentrations of the reactants and products determine the position of equilibrium. The position of equilibrium, in turn, is affected by any changes made to the concentrations of these reactants and products, such as by changing the volume of the system or altering the amount of one or more of the components in the system.
A change in the volume of a gas system can alter the position of equilibrium in a reaction. For example, decreasing the volume of the system to half of its original value can increase the concentration of the gases and shift the position of equilibrium to the side with fewer moles of gas. Conversely, increasing the volume of the system to twice its original value can decrease the concentration of the gases and shift the position of equilibrium to the side with more moles of gas.
Doubling the amount of one of the components in the system can also change the position of equilibrium in a reaction involving gases. Increasing the amount of one of the reactants will result in the formation of more products, which will shift the position of equilibrium to the side with fewer moles of gas. Similarly, doubling the amount of all of the components in the system will result in the formation of more products, which will shift the position of equilibrium to the side with fewer moles of gas.
In summary, the position of equilibrium in a reaction involving gases can be altered by changes in volume or by changes in the amounts of the components in the system.
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The data found below measure the amounts of greenhouse gas emissions from three types of vehicles. The measurements are in tons per year, expressed as CO2 equivalents. Use a 0.025 significance level to test the claim that the different types of vehicle have the same mean amount of greenhouse gas emissions. Based on the results, does the type of vehicle appear to affect the amount of greenhouse gas emissions? Click the icon to view the data. What are the hypotheses for this test? A. H 0
:μ 1
=μ 2
=μ 3
H 1
: At least one of the means is different from the others. B. H 0
: At least one of the means is different from the others. H 1
:μ 1
=μ 2
=μ 3
C. H 0
:μ 1
=μ 2
=μ 3
H 1
:μ 1
=μ 2
=μ 3
D. H 0
:μ 1
=μ 2
=μ 3
H 1
:μ 1
=μ 2
=μ 3
Determine the test statistic. F (Round to two decimal places as needed.)
Answers
Answer: A. H 0 μ1 = μ2 = μ3
Ha μ1 ≠ 2μ ≠ μ3
2. Test Statistics is 95%
3. Critical F-Value is 3.76.
4. P-Value is 2.32.
5. Conclusion Reject the null hypothesis.
6. Type of vehicle does effect the amount of green house gas emissions.
The correct order of the steps of a hypothesis test is given below.
1. Determine the null and alternative hypothesis.
2. Select a sample and compute the critical value F-test for the sample mean.
3. Determine the probability at which you will conclude that the sample outcome is very unlikely.
4. Make a decision about the unknown population.
All steps are performed in the given sequence to test a hypothesis.
The null hypothesis is rejected or accepted on the basis of level of significance. When the p-value is greater than level of significance we fail to reject the null hypothesis and null hypothesis is then accepted. It is not necessary that all null hypothesis will be rejected at 95% level of significance. To determine the criteria for accepting or rejecting a null hypothesis we should also consider p-value.
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Explanation:
Is oil and water
(shown by the close-up in this image) a solution?
no
yes
Answers
Answer:
no
Explanation:
Because they sit on top of each other.
Which atom's valence electrons experience the greatest effective nuclear charge?
1)the valence electrons in In
2)the valence electrons in Sr
3)the valence electrons in Te
Answers
The atom's valence electrons experience the greatest effective nuclear charge is the valence electrons in Te. the correct option is 3.
What are valence electrons?Valence electrons are the electrons that are present in the outer shell of the atoms. These electrons are free electrons to form bonds with the electrons of other atoms.
The element that has fewer valence electrons can easily donate its electron and make the bond with another atom. Its reactivity will be high. If an atom contains many-electron in its outer shell, it will be difficult to donate them.
But if the atom will need just one or two electrons to complete its shell, then its reactivity will be high. Here, the Te will have the greatest effective nuclear charge.
Thus, the correct option is 3. The valence electrons in Te.
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A burner in a gas stove breaks propane and oxygen up to form carbon dioxide and water, thereby heating a home. Which part is the source of the activation energy required, and is this reactionendothermic or exothermic? (1 point)O The flame from the burner provides the energy to perform the reaction. The reaction is exothermic.O The burning propane gas provides the energy to perform the reaction. The reaction is endothermic.O The burning propane gas provides the energy to perform the reaction. The reaction is exothermic.O The flame from the burner provides the energy to perform the reaction. The reaction is endothermic.
Answers
Answer:
The third option is correct
explain why elements with high ionization energies typically also have high electronegativity values
Answers
Elements with high ionization energies typically also have high electronegativity values.
This is because the strength of the attraction between an atom and the electrons it contains affects both properties. The more strongly an atom attracts its electrons, the higher it's ionization energy and electronegativity.
This is because it requires more energy to remove the electrons from the atom, resulting in higher ionization energy, and it will also take more energy to attract electrons away from another atom, resulting in a higher electronegativity. This means that elements with high ionization energies typically also have high electronegativity values.
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FILL IN THE BLANK. in a mixture of 5 ml water, 10 ml alcohol, and 50 ml acetone the solvent(s) is(are) ________.
Answers
The solvent here is acetone.
When we mix two miscible liquids, the one with the largest amount will act as the solvent. Here water, alcohol, acetone are miscible liquids. That is all three are soluble in each other. In such cases the one with the maximum quantity will be the solvent.
So, since acetone is in largest quantity, that is, 50ml, it will act as the solvent.
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Which has a greater energy, a photon of yellow light, or a photon of green light
Answers
Answer:
A photon of green light has a higher energy since it has a higher frequency than the yellow photon. And we can see that on the picture representation of the light spectre.
which of the following compounds have integer i values? (select all that apply.) which of the following compounds have integer i values? (select all that apply.) kcl ch3cooh na2co3 hclo4
Answers
The following compounds have integer i values:KClNa2CO3
The following compounds have integer i values: KCl and Na2CO3.
i stands for van't Hoff factor and is the number of particles formed from one solute molecule in a solution.
An i value of 1 means that no particles are produced upon solvation or that the solute molecule exists independently in the solvent.
Conversely, an i value greater than one indicates that one molecule of solute produces more than one particle in the solvent. This includes molecules that dissociate into ions, form complexes, or exist in a solvent as aggregates.
It is worth noting that the i value is an experimentally derived value and may not necessarily be an integer.
According to the question, the following compounds have integer i values:KClNa2CO3
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what do the atomic scale models show you that your observations of properties cannot?
Answers
The creation of an appropriate atomic-scale model, from which we may extract data on electrical characteristics or specific chemical variables, such as reaction energies and activation barriers, is essential to this strategy.
What is the atomic scale model ?One of the main topics of study in the discipline of solid state physics is the modelling of bulk materials and surfaces at the atomic scale.
Ab initio calculations are anticipated to shed further light on the energy associated with atomic movements, electronic exchanges, and other yet more sophisticated systems.
Thus,The atomic number is the number of protons in the nucleus of an atom. The number of protons defines the individuality of an element.
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If 2,035 J of heat is added to a 500.0 g sample of water at 35.0°C, what is the final temperature of the water? Specific heat of water is 4.18 J/g°C. (Find the temperature change then subtract the initial temperature given).
Answers
Q = mCΔT
where Q is the heat added, m is the mass of the water, C is the specific heat of water, and ΔT is the change in temperature.
Plugging in the given values, we get:
2035 J = 500.0 g x 4.18 J/g°C x ΔT
Simplifying and solving for ΔT, we get:
ΔT = 2035 J / (500.0 g x 4.18 J/g°C) = 0.97°C
This is the change in temperature of the water. To find the final temperature, we need to subtract this from the initial temperature of 35.0°C:
Final temperature = 35.0°C - 0.97°C = 34.03°C
Therefore, the final temperature of the water is 34.03°C.
What is the [OH-] if the pH is 7
Answers
Answer:
neutral [H3O+] = [OH−] pH = 7 7.2: pH and pOH
Explanation:
At pH 7, the substance or solution is at neutral and means that the concentration of H+ and OH- ion is the same.
How long does one complete orbit of Earth around
the sun take, give the amount in years and days?
Answers
Answer:365 days, 5 hours, 59 minutes and 16 seconds.
List three specific examples of a physical change.
Answers
Answer:
Cutting hair is a physical change since it doesn't change the substance its still hair
bending a paper clips since it's also the same substance
Ice cube melting
Explanation:
All of these are physical change since there reversible and they all still stay the same substance
So if u melt ice it is a physical change because you can freeze it again.
Cutting your hair and nails are physical because they grow again.
Boiling water is also a physical change.
cellular respiration is when what energy from sugar/glucose is converted to cellular
Answers
Answer:
The correct answer is - cellular respiration is when chemical energy from sugar/glucose is converted to cellular energy in the form of ATP.
Explanation:
Cellular respiration is a set of metbolic reaction that takes place inside the cell and breaking the sugars or nutrients to convert the chemical energy present in the nutrients into the cellular energy whic is used by cells that is ATP and release water and carbon dioxide as waste.
In this process the ammount of energy store in the cellular currecncy or ATP which is the form of energy that is utilized by the to perform its sunction. The chemical energy that is present in the nutrients or sugar is come from light energy which is stored in the nutrients by photosyntheis process.