Answers
Answer:
Fluorine (F)
Explanation:
The poorest conductor of electricity from the given choices is fluorine. This is because fluorine is a non - metal.
Like other non - metals, fluorine does not conduct electricity.
Only metals are known to conduct electricity and heat readily.
Semi - metals like silicon will conduct electricity under specific condition.
The free mobile electrons in metals makes it easy for them propagate electricity
Related Questions
Which statements are TRUE about fossil fuels? (Select all that apply.)
They are in a limited supply.
They do not replenish themselves.
They are expensive to extract compared to other forms of energy.
They release large amounts of carbon dioxide when burned
✎help its an exam✎ ☕︎if any links I WILL REPORT☕︎
Answers
Answer:
All is Correct
Explanation:
Fossil fuels have the following properties:
They are in a limited supply. Fossil fuels are non-renewable resources, meaning that they cannot be replenished at the same rate as they are consumed. Once they are used up, they are gone forever.They do not replenish themselves. Fossil fuels take millions of years to form under specific geological conditions. They cannot be regenerated by natural processes in a human timescale.They are expensive to extract compared to other forms of energy. Fossil fuels require complex and costly methods to locate, drill, mine, transport, and refine. They also have negative externalities, such as environmental damage, health risks, and social conflicts, that are not reflected in their market prices.They release large amounts of carbon dioxide when burned. Fossil fuels contain carbon that was stored underground for millions of years. When they are burned, they release carbon dioxide (CO2) into the atmosphere, which is a greenhouse gas that contributes to global warming and climate change.Therefore, the answer is to select all
Answer:
It's A, B, and D
Explanation:
Maybe not D, because that is burning wood like charcoal. Not sure about that. Hope this helps!
Write a persuasive essay stating which you believe is the most important Amendment to the U.S. Constitution: Amendment One, Four, or Six. Include three reasons to support your thesis.
Answers
Title: The First Amendment: Safeguarding Fundamental Freedoms
While all amendments are crucial, the First Amendment holds unparalleled significance in upholding the principles of liberty, equality, and democracy.
The First Amendment to the U.S. Constitution is undoubtedly the most important amendment as it safeguards fundamental freedoms that form the bedrock of a democratic society.
This amendment, which encompasses the rights of freedom of speech, religion, press, assembly, and petition, plays a vital role in protecting individual liberties and ensuring a just and inclusive society. There are three key reasons why the First Amendment stands out as the cornerstone of our democracy.
Firstly, freedom of speech allows citizens to express their ideas, opinions, and criticisms, fostering a robust marketplace of ideas essential for progress and social change. This right empowers individuals to challenge authority, hold public officials accountable, and engage in meaningful dialogue that drives societal progress.
Secondly, freedom of religion guarantees individuals the right to practice their faith without interference from the state. This principle promotes religious tolerance, diversity, and pluralism, creating a society where individuals can freely worship and live in accordance with their beliefs.
Lastly, freedom of the press ensures an informed citizenry by safeguarding independent journalism. A free press acts as a check on governmental power, exposes corruption, and provides essential information necessary for a functioning democracy.
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A student titrates 10.0 g of his borax solution with 3.00 M sulfuric acid, requiring 182 microliters of the acid
to reach the equivalence point. Calculate the mass percent of the borax solution.
Answers
how will you ensure your server is protected from data hacks?
Answers
Firewalls are used to filter network traffic and are available as standard system software on most operating systems. Limit the openings hackers have to your server.
Answer:
Establish and Use a Secure Connection
Use SSH Keys Authentication
Secure File Transfer Protocol
Secure Sockets Layer Certificates
Use Private Networks and VPNs
Explanation:
In lab you measure out 95.12 grams of C4H8O4 for an experiment. How many mol is this? Give your answer to 2 decimal spaces.
Answers
The molar mass of the compound C₄H₈O₄ is 120 g/mol. Then the number of moles of this compound in 95.12 g is 0.79 moles.
What is molar mass ?One mole of every substance contains 6.022 × 10²³ atoms or molecules. This number is called Avogadro number. Thus, one mole of every element contains Avogadro number of atoms.
Similarly one mole of every compound contains Avogadro number of molecules. The mass of one mole of a compound is called its molar mass.
molar mass of C₄H₈O₄ = 120 g/mol (C =12g, O= 16g, H =1 g).
then, number of moles in 95.12 g = given mass/molar mass
no.of moles = 95.12 g /120 g/mol = 0.79 moles.
Therefore, the number of moles of the compound in 95.12 g is 0.79 moles.
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WHEN SOME PEOPLE HAVE AN UPSET STOMACH, THEY TAKE A SODA TABLET LIKE
TUMS TO NEUTRALIZE THEIR STOMACH ACID.
THE REACTION IS HYDROCHLORIC ACID PLUS SODIUM BICARBONATE MAKES SALT,
CARBON DIOXIDE (THAT'S WHY SOME PEOPLE BURP) AND WATER.
HOW MUCH CARBON DIOXIDE AND SALT (IN GRAMS) ARE PRODUCED IF A 2 GRAM
TABLET OF SODIUM BICARBONATE IS TAKEN TO REACT WITH 18 GRAMS OF
HYDROCHLORIC ACID?
Answers
The balanced chemical equation for the reaction between hydrochloric acid (HCl) and sodium bicarbonate \((NaHCO_3)\) is:
\(HCl + NaHCO_3\ - > NaCl + CO_2 + H_2O\)
The coefficients in the balanced equation show that 1 mole of HCl reacts with 1 mole of \(NaHCO_3\) to produce 1 mole of NaCl, 1 mole of \(CO_2\), and 1 mole of \(H_2O\). We need to find the number of moles of \((NaHCO_3)\) present in the tablet.
2 grams of \(NaHCO_3\) is equivalent to 0.02 moles, and 18 grams of HCl is equivalent to 0.45 moles. Since \((NaHCO_3)\) is limiting reagent, only 0.02 moles of NaCl and \(CO_2\) will be produced. The molar mass of \(CO_2\) is 44 g/mol, so the mass of \(CO_2\) produced is 0.88 g. The molar mass of NaCl is 58.44 g/mol, mass of NaCl produced is 1.17 g.
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What is the degree of oxidation of a simple substance
Answers
Answer: The oxidation state of a free element (uncombined element) is zero. For a simple (monoatomic) ion, the oxidation state is equal to the net charge on the ion. For example, Cl– has an oxidation state of -1. When present in most compounds, hydrogen has an oxidation state of +1 and oxygen an oxidation state of −2.
Hope this helps...... Stay safe and have a Merry Christmas!!!!!!!!!!! :D
Explanation:
The reaction described by the equation O3(g)+NO(g)⟶O2(g)+NO2(g) has, at 310 K, the rate law
rate of reaction=[O3][NO]=3.0×106 M−1⋅s−1
Given that [O3]=4.0×10−4 M and [NO]=2.0×10−5 M at =0, calculate the rate of the reaction at =0
Answers
According to the question the rate of the reaction at =0 is 8.0 × 10−9 M2·s−1.
What is reaction?A reaction is an action or response to a stimulus. It can be a physical or mental response to the environment, or it can be a chemical reaction that occurs when two or more substances interact with each other. Reactions can be conscious or unconscious, and can involve emotions, memories, thoughts, or behaviors. All reactions are the result of some kind of change that occurs in the body or environment. Reactions can be beneficial or detrimental, depending on the situation. Learning how to recognize and control your reactions can help you make better decisions and lead a healthier, more successful life.
The rate of the reaction at =0 can be calculated by substituting the values of [O3] and [NO] into the rate law:
rate of reaction=[O3][NO]
= (4.0 × 10−4 M) (2.0 × 10−5 M)
= 8.0 × 10−9 M2·s−1
Therefore, the rate of the reaction at =0 is 8.0 × 10−9 M2·s−1.
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How many moles are in 28g of CO2?
Answers
Answer:
0.636 moles of CO2
Explanation:
The molar mass of CO2 is 44.01 g/mol (12.01 g/mol for one carbon atom and 2 x 16.00 g/mol for two oxygen atoms). To find the number of moles in 28g of CO2, you can divide the mass by the molar mass: 28g / 44.01 g/mol = 0.636 moles of CO2.
What is the correct way to report the length of the rectangle in centimeters ?
Answers
The length of the rectangle is 16 cm.
What is the length of the rectangle?We know that area is the product of the rectangle is the product of the length and the breadth of the rectangle. The perimeter of the rectangle is the distance round the rectangle. In this case, the rectangle has been showed in the image attached to the question.
We can see the meter rule which is the instrument that is used in the measurement of length. The meter rule is often calibrated in accordance with the metric system or the subunits of the metric system.
Having looked at the measurement is shown in the image shown, it is then clear that the length of the rectangle is 16 cm.
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A group of scientists must complete a study, but they have
limited funding from a government organization. Name
two ways these scientists can work around this limitation.
Answers
The scientific community may act somewhat on restricted government financing circumstances throughout two ways:
Source for further money.Adjust this same scale and complexity of the investigation.
Source for further money:
A researcher anyone who has restricted equipment and materials to finish an investigation might cooperate with certain other scientists as well as establish networking to exchange resources, thoughts, and behaviors for the survey's completion.Adjust this same scale and complexity of the investigation:
To decrease costs, the researchers might measure the study up by decreasing the levels initially intended for the investigation.
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Answer:
Explanation:
One solution is to limit the scope of the study. Another possibility is do several smaller studies over a longer period of time.
Which of the following qualities is most frequently used to measure the amount of a substance in a solution?
weight
shape
size
density
light absorbance
Answers
There are many methods which can be used to represent the concentration of a solution. Molarity, mole fraction, molality, etc. are used to represent the concentration of a solution. Here weight denotes the quantity of the substance. The correct option is A.
What is concentration?The concentration of a substance is defined as the quantity of the solute present in a given amount of the solution. The quantity of a solute is usually denoted as the weight of the solute. The method molarity is mainly based on the weight of the solute.
The amount of substance can be represented by weight and its units are gram and kilogram.
Thus the correct option is A.
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Does the food you eat can affect your gut bacteria? Explain?
Answers
Answer: Your gut bacteria can affect how your food is digested, how fat is stored and whether you feel hungry or full.
Explanation: Thus, a healthy gut bacteria may be important for maintaining a healthy weight. High-fiber foods like whole grains, fruits, vegetables, nuts and seeds can all promote healthy gut bacteria.
GIVING BRAINLIST ASAP
As the ice melts into liquid water, what happens to the kinetic energy of the particles in the sample?
Answers
Answer:
Increases
Explanation:
As ice melts into liquid water, the kinetic energy of the particles increases.
This is because to melt ices, heat energy is supplied.
The sum total of all the average speed of the particles in a substance is the heat energy. Heat is a form of kinetic energy. As more heat is added, the particles moves rapidly and the kinetic energy increase.
Why do we have to decide what to do in a day?
Answers
Answer:
otherwise you will be bord and have nothing to do
Explanation:
Otherwise, we would just be blobs and do nothing.
Why is the oxygen end of the water molecule attracted to the sodium ion
Answers
Explanation:
oxygen has a negative charge
sodium has a positive charge
opposites attract
Do the multiplication and show the answer with the correct significant figures.
3.6 x 4.27
A:
Answers
Answer:
15
Explanation:
In multiplication: the least number of significant figures in any number of the problem determines the number of significant figures in the answer.
3.6 has two significant figures, therefore, the number of significant figures is 2
Scientific notation: 1.5 x 10
#1: Multiply
3.6 x 4.27 = 15.372
#2: Round to 2 significant figures
15
3.6*4.27 = 15.372
There are two significant digits because the lowest amount given in the question is 3.6 which has two significant digits. We follow that with our answer, giving us 15.
You are making a fluorescence measurement at a concentration of 500 pM and get a signal to noise of 5. If you need a detection limit of 75 pM, by how much do you need to increase the source power? Assume all you noise is from the instrument so you can use the 3 x standard deviation definition.
Answers
By -320 pM, we need to increase the source power. A fluorescent material begins to produce visible light when energy is absorbed as a result of the incidence of X-rays, light waves, and electrons.
What is fluorescence?When a substance generates electromagnetic waves inside the longer wavelength range and makes them visible to the human eye, it is a fascinating occurrence. Let's first define fluorescence in order to comprehend this. This allows the substance to gently transition from the partly excited state to the ground state. Fluorescence is the term for this phenomena.
Detection limit = 3 × noise / signal to noise ratio
Detection limit = 3× 75 pM / 5 = 15 pM
Source power = (noise / desired detection limit)² × current source power
Source power = (15 pM / 75 pM)² ×500 pM
= 0.36 ×500 pM
= 180 pM
Source power= 180 pM - 500 pM =
=-320 pM
Therefore, -320 pM, we need to increase the source power.
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Calculate the pOH of a 7.68x10^-6 M HCl solution.
pOH= _________(round to the nearest 3 sig figs)
This solution is _________(acidic/basic).
(40 points)
Answers
The pOH of a 7.68x10^-6 M HCl solution can be calculated as follows:
pH + pOH = 14 pH = -log[H+] = -log(7.68x10^-6) = 5.114 pOH = 14 - pH = 8.886
Therefore, the pOH of the solution is 8.886, and since pOH and pH are related, the solution can be classified as acidic.
How does the concentration of H+ ions in a solution affect its acidity or basicity?The concentration of H+ ions in a solution is a measure of its acidity. In general, the higher the concentration of H+ ions, the more acidic the solution will be. Conversely, the lower the concentration of H+ ions, the more basic the solution will be.
Can the pOH of a solution be higher than 14? If so, what would that imply about the solution?The pOH of a solution is related to the concentration of OH- ions. A pOH value of 14 corresponds to a solution with a concentration of OH- ions of 1x10^-14 M. However, if the concentration of OH- ions is lower than this, the pOH value will be higher than 14.
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The beaker is left until there is no further change in the appearance of the liquid. And the options for the answer are : A : All the liquid is purple. B : None of the liquid is purple. C : Only the bottom half of the liquid is purple. D : Only the top half of the liquid is purple
Answers
Answer:
none of the liquid is purple
4. Iron (III) oxide, Fe2O3, is formed when iron, Fe, combines with oxygen in the air. How many grams of
Fe2O3 are formed when 12.5 g of Fe reacts completely with oxygen?
4Fe +302 → 2Fe203
a. 8.74 g Fe2O3
b. 17.9 g Fe2O3
C. 32.2 g Fe2O3
d. 71.5 g Fe2O3
Answers
Which equation shows an increase in entropy?
Hint: Look at the states of matter, g s l, of the chemicals in each equation. A C2H4(g) + H2(g) + C2H6(g) в Caco3(9) + Cao(s) - CO2(g) c Fe(s) + S (s) -+ FeS (s)
Answers
The equation C2H4(g) + H2(g) + C2H6(g) → Caco3(s) + Cao(s) + CO2(g) shows an increase in entropy due to the formation of a gas as a product. Option A
In this equation, the reactants on the left-hand side consist of gases (C2H4 and H2), while the products on the right-hand side include a solid (Caco3) and a gas (CO2).
When a reaction involves a change from gaseous to solid or liquid states, there is typically a decrease in entropy because the particles become more ordered and constrained in the solid or liquid phase.
Conversely, when a reaction involves the formation of gases, there is generally an increase in entropy because gases have higher degrees of molecular motion and greater freedom of movement compared to solids or liquids.
In the given equation, the reactants include three gaseous compounds (C2H4, H2, and C2H6), and one of the products is a gas (CO2). Therefore, the overall entropy of the system increases during this reaction.
The equation Fe(s) + S(s) → FeS(s) does not show an increase in entropy. Both the reactants (Fe and S) and the product (FeS) are solids. Since solids have lower entropy compared to gases or liquids, the entropy of the system does not increase in this reaction. Option A
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A solution is prepared by dissolving 27.7 g of CaCl2 in 375 g of water. The density of the resulting solution is 1.05 g/mL. The concentration of CaCl2 is ________% by mass. A solution is prepared by dissolving 27.7 g of CaCl2 in 375 g of water. The density of the resulting solution is 1.05 g/mL. The concentration of CaCl2 is ________% by mass. 6.24 6.88 7.22 0.0722 0.0688
Answers
Answer:
6.88%
Explanation:
Step 1: Given data
Mass of CaCl₂ (solute): 27.7 gMass of water (solvent): 375 gStep 2: Calculate the mass of the solution
The mass of the solution is equal to the sum of the masses of the solute and the solvent.
mSolution = mSolute + mSolvent
mSolution = 27.7 g + 375 g = 402.7 g
Step 3: Calculate the percentage by mass of CaCl₂
We will use the following expression.
%m/m = mass CaCl₂/mass Solution × 100%
%m/m = 27.7 g/402.7 g × 100% = 6.88%
Please show you work
This is 7th grade science
Answers
2) It will accelerate to the right 8>6
3) It will not move. 15=15
The Sun has been shining on this swimming pool all day. The water is much warmer than it was in the morning. Describe what is happening to the water in terms of temperature, particle speed, and kinetic energy.
Answers
Answer:
The waters' temp increased
Explanation:
The temperature of the water in the swimming pool has increased due to the heat from the Sun. As a result, the particles in the water are moving faster and have a higher kinetic energy than in the morning.
If 50 joules of energy is added to sample of water, the temperature will?
Answers
Explanation:
The temperature change of a substance when it absorbs or loses energy can be calculated using the specific heat capacity of the substance. The specific heat capacity of water is approximately 4.18 J/(g°C), which means that it takes 4.18 joules of energy to raise the temperature of 1 gram of water by 1 degree Celsius.
To calculate the temperature change of the water sample when 50 joules of energy is added, we need to use the following equation:
q = m * c * ΔT
where q is the amount of energy absorbed by the water, m is the mass of the water sample, c is the specific heat capacity of water, and ΔT is the resulting temperature change.
Rearranging the equation to solve for ΔT, we get:
ΔT = q / (m * c)
Plugging in the values, we get:
ΔT = 50 J / (m * 4.18 J/(g°C))
We need to know the mass of the water sample to calculate the temperature change. Let's assume a mass of 10 grams:
ΔT = 50 J / (10 g * 4.18 J/(g°C))
ΔT = 1.2°C
Therefore, if 50 joules of energy is added to a 10-gram sample of water, the resulting temperature change will be approximately 1.2 degrees Celsius.
which does NOT show earth's past environment?
a. ice cores
b. mud cracks
c. ripple marks
d. rock color
Answers
Answer:
I think the answer is rock color
Explanation:
I took this test and I read the passage . And it mentions everything but “Rock color” hope this helps!
The noble gases are the least _____ of any elements on the periodic table. The _____ form acidic compounds with hydrogen. The halogens are the most reactive among all the _____.
Answers
The noble gases are the slight reactive of any elements on the periodic tableland. The nonmetals form acidic compounds with hydrogen. Halogens are the most reactive from nonmetals.
Noble gases are a group of elements that are placed in Group 18 of the periodic table. Noble gases are also called Inert gases. They are very less reactive metals because the valence electrons in the outermost orbital are in a paired state with each other.
Nonmetals are a group that is placed on the right side of the periodic table. They have very low boiling points and low melting points. They are always ready to pair with reactive metals.
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In two or more complete sentences, explain the responses of vomiting and fever. Be sure to state the stimuli that cause
the response, and the purpose of the response.
Answers
Weakness and nausea are the responses of vomiting and fever. Because people tend to feel weak and uneasy after vomiting.
What do you mean by Response?A response is a response to a stimuli, such as a question, an experience, or another kind of stimulus. You are experiencing an emotional reaction to the drama being played out on screen if you cry during sad movies. A response can take many different forms, such as an explanation for a question, an emotional response, or a rejoinder.
The act of vomiting is the forceful ejection through the mouth of the contents of the upper digestive tract and stomach. It can also be referred to as throwing up or feeling ill.
Vomiting is a reflex that aids the body in getting rid of potentially dangerous chemicals. The majority of people will eventually vomit.
This information relates to vomiting in adults and kids older than 12. For details pertaining to children between the ages of 0 and 12 years, see vomiting in children.
Therefore, Weakness and nausea are the responses of vomiting and fever.
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Complete the Molecular formula, complete ionic equation and net ionic equation for the following:
Answers
The molecular formula for sodium nitrate is NaNO₃, and the molecular formula for potassium acetate is KCH₃COO.
Complete ionic equation:
Na⁺(aq) + NO₃⁻(aq) + K⁺(aq) + CH₃COO⁻(aq) → Na⁺(aq) + CH₃COO⁻(aq) + K⁺(aq) + NO₃⁻(aq)
Net ionic equation:
NO₃⁻(aq) + CH₃COO⁻(aq) → no reaction
The net ionic equation shows that there is no reaction between sodium nitrate and potassium acetate. When these compounds are mixed, they will dissociate into their respective ions in solution, but these ions do not react with each other to form any new compounds or products. Therefore, the net ionic equation is simply the two ions that remain in solution after dissociation.
When sodium nitrate (NaNO₃) and potassium acetate (KCH₃COO) are mixed in water, they dissociate into their respective ions due to the polar nature of water molecules.
The net ionic equation shows only the species that are involved in the actual reaction, which in this case is no reaction. We can see that the NO₃⁻ and CH₃COO⁻ ions are both present on both sides of the equation, meaning that they do not react with each other. Therefore, there is no change in the identity of the species present in solution, and no new compounds are formed.
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