Answer:
Metals are malleable : They can be bent and shaped without breaking. This is because they consist of layers of atoms that can slide over one another when the metal is bent, hammered or pressed.
Explanation:
Pure iron is a bright silvery white metal which oxidizes (rusts) rapidly in moist air or in water containing dissolved oxygen. It is soft, malleable, and ductile, and is strongly magnetic (ferromagnetic).
A liquid ester used to flavour food is believed to be impure. What would be the best way of testing its purity?
Answer:
Filter it
Explanation:
The EPA's goal in regulating industries is...
• to limit the size of industrial companies.
• to keep industrial companies from controlling a monopoly in their market.
• to protect people and the environment.
• to tax industrial companies to provide money for the government.
Answer: C. to protect people and the environment
Explanation:
The EPA's goal in regulating industries is to protect people and the environment. The correct option is c.
What is Environmental Protection Agency?The Environmental Protection Agency develops and implements environmental legislation, funds and conducts research, and guards against serious health threats to people and the environment.
Today, regulations set by various administrative authorities affect almost every aspect of a company's operations, including the financial structure and financing, recruiting and firing procedures, interactions with employees and labor unions, and the techniques utilized in product manufacturing.
Thus, the correct option is c. to protect people and the environment.
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In an alkalinity test, a sample is titrated with a stand-ardized acid. If 7.5 milliliters of an acid with a knownstrength of 0.02 equivalents per liter (or 0.02 N) areneeded to complete a titration with 60 mL of sample,what is the sample's alkalinity in mg/L as CaCO3?
Answer:
Explanations:
2. Which state of matter is characterized by particles that are close to each other but are not arranged in a definite pattern?
A)liquid
B)plasma
C)solid
D)gas
Answer:
Solid
Explanation:
Cus its solid, take a brick for example. It's hard and has no space unlike liquid or gas.
An emission spectrum has a line in the blue region. How does this occur in the atom?
A. An electron ABSORBS a photon as it goes from a HIGHER TO LOWER energy level.
B. An electron EMITS a photon as it goes from a HIGHER TO LOWER energy level.
C. An electron EMITS a photon as it goes from a LOWER TO HIGHER energy level.
D. An electron ABSORBS a photon as it goes from a LOWER TO HIGHER energy level.
B. An electron EMITS a photon as it goes from a HIGHER TO LOWER energy level.
When an electron in an atom drops from a higher energy level to a lower energy level, it releases energy in the form of a photon.
What is Spectrum?
In science, the term "spectrum" is often used to describe the range of colors of visible light, known as the "visible spectrum," which includes all the colors of the rainbow. This spectrum is produced when white light is dispersed into its component colors by a prism or other means.
This energy is specific to the atom and its electron configuration, which is why each atom emits a unique set of wavelengths, creating a distinct emission spectrum.
Since the emission spectrum in the question has a line in the blue region, it means that the energy released by the electron corresponds to a specific frequency or wavelength in the blue region of the visible spectrum.
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Describe the trend of the reactivity of the elements in group VII
The non-metal elements in Group 7 – known as the halogens – get less reactive as you go down the group
Answer & Explanation:
The reactivity of elements in Group VII, also known as Group 17, decreases with increasing atomic radius. This is because halogens have high electronegativities and a proclivity to gain electrons in noble gas configurations. Myths are traditional stories or beliefs that explain cultural or societal beliefs, customs, or natural phenomena. They can be passed down through generations and can be based on true or fictitious events. Mythology, on the other hand, is the collection of myths associated with a specific culture or religion. Mythology can be amplified through retelling, incorporation into religious practices; association with significant events or figures, and adaptation into other media forms such as literature, film, or art.
a cell is placed in a salt solution that has the same concentration as the inside of the cell. What will happen to the cell ?
Answer:
it would dry up
Explanation:
A chemist reacted 18.0 Liters of F2 gas with NaCL in the laboratory to form Cl2 gas and NaF. use the ideal gas law equation to determine the mass of nacl that reacted with f2 at 290 k and 1.5 atm
f2+ 2nacl -> cl2 + 2naf
Explain how you would determine the mass of sodium chloride that can react with the same volume of fluorine gas at STP.
The ideal gas law equation is: PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature.
To determine the mass of NaCl that reacted with F2 at 290 K and 1.5 atm, we can rearrange the equation as follows: n = PV/RT. Substituting in the values for P, V, R, and T, we get: n = (1.5 atm)(18.0 L)/(0.0821 atm*L/mol*K)(290 K) = 0.835 mol NaCl.
To determine the mass of sodium chloride that can react with the same volume of fluorine gas at STP (standard temperature and pressure), we would use the same equation but with the values for P, V, R, and T corresponding to STP. At STP, P = 0.987 atm, V = 18 L, R = 0.0821 atm*L/mol*K, and T = 273 K. Therefore, n = (0.987 atm)(18 L)/(0.0821 atm*L/mol*K)(273 K) = 0.792 mol NaCl.
What is Sodium chloride?
Sodium chloride, also known as table salt, is an ionic compound composed of sodium and chloride ions in equal proportions. It is a mineral found naturally in most bodies of water, including sea water, and is widely used as a seasoning and preservative in food.
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Answer:
The ideal gas law equation is: PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature.
To determine the mass of NaCl that reacted with F2 at 290 K and 1.5 atm, we can rearrange the equation as follows: n = PV/RT. Substituting in the values for P, V, R, and T, we get: n = (1.5 atm)(18.0 L)/(0.0821 atm*L/mol*K)(290 K) = 0.835 mol NaCl.
To determine the mass of sodium chloride that can react with the same volume of fluorine gas at STP (standard temperature and pressure), we would use the same equation but with the values for P, V, R, and T corresponding to STP. At STP, P = 0.987 atm, V = 18 L, R = 0.0821 atm*L/mol*K, and T = 273 K. Therefore, n = (0.987 atm)(18 L)/(0.0821 atm*L/mol*K)(273 K) = 0.792 mol NaCl.
Explanation:
Question 1
What is thermal energy
The term "thermal energy" refers to an object's internal energy that results from the movement of its constituent particles. The temperature of the item increases with the amount of kinetic energy these particles possess.
Heat is the thermal energy that is transferred between things when their temperatures differ. Temperature is a measurement of the average kinetic energy of the particles in a substance, and it is connected to the idea of thermal energy.
When two items with different temperatures come in touch with one another, thermal energy will go from the hotter to the cooler object until they achieve thermal equilibrium, when both objects are at the same temperature. Numerous branches of research and technology, such as thermodynamics, energy transmission, and materials science, all heavily rely on thermal energy.
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The density of lead is 11.4g/cm3. What volume, in ft3, would be occupied by 10.0 g of lead?
Answer:
3.10×10¯⁵ ft³.
Explanation:
The following data were obtained from the question:
Density (D) of lead = 11.4 g/cm³
Mass (m) of lead = 10 g
Volume (V) of lead =.?
Density (D) = mass (m) / Volume (V)
D = m/V
11.4 = 10 / V
Cross multiply
11.4 × V = 10
Divide both side by 11.4
V = 10 / 11.4
V = 0.877 cm³
Finally, we shall convert 0.877 cm³ to ft³. This can be obtained as follow:
1 cm³ = 3.531×10¯⁵ ft³
Therefore,
0.877 cm³ = 0.877 cm³ × 3.531×10¯⁵ ft³ /1 cm³
0.877 cm³ = 3.10×10¯⁵ ft³
Thus, 0.877 cm³ is equivalent to 3.10×10¯⁵ ft³.
Therefore, the volume of the lead in ft³ is 3.10×10¯⁵ ft³.
true or false
1. resistance provides friction to electron movement
2.high resistance will speed up electron movement
3.a circuit is an open path for electrons to move through
4. in a circuit, electrons move from the low voltage area to the higher
5. in a circuit, the light bulb is called the load
Answer:1
Explanation: friction is showing us how in the past
How are electricity and magnetism related?
Moving magnets can make electrical currents.
Electricity can create a magnetic field.
Electricity and magnetism are not related.
Protons and electrons are repelled by magnets.
Need help now this work is due by 5:00
Answer: Electricity and magnetism are essentially two aspects of the same thing, because a changing electric field creates a magnetic field, and a changing magnetic field creates an electric field.
Answer:How are electricity and magnetism related?
Moving magnets can make electrical currents.
Electricity and magnetism are not related.
Protons and electrons are repelled by magnets.How are electricity and magnetism related?
Moving magnets can make electrical currents.
Electricity and magnetism are not related.
Protons and electrons are repelled by magnets.How are electricity and magnetism related?
Moving magnets can make electrical currents.
Electricity and magnetism are not related.
Protons and electrons are repelled by magnets.
Explanation:
100 points!
A metal (M) forms a compound with the formula MCl4 . The compound contains 54.43% Cl by mass. Identify the metal in the compound? Give the symbol of the metal
Symbol is [Sn]
Atomie weight of cl is 35.45 Hence, in the compound MCl4, contribution of a atomic weight in 35.45 4 =141.8Now, the compound contains (100-54.43)
= 45.57% of metal by mass.
Now, 54.43% by mass is related to 141.8 atomic weight
hence, 45:57% by mass is related to
=1418 x 45.57/54.43 = 118.718 atomic weight
Atomic weight of Tin (sn) is 118.71
Hence, the metal is Tin, Symbol is [Sn]
The compound is SnCl4 (Stannic chloride)
A compound is a formula that occurs in a certain ratio of a specific formula, for as carbon dioxide, which is present everywhere but only in carbon 1 and oxygen 2.To know more about compound visit : https://brainly.com/question/14658388
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5.05 g
Express your answer as an integer.
Answer:5.5
Explanation:
A new alloy is designed for use in a car radiator. If the 17.6 kg radiator required 8.69 × 105 J of heat to warm from 22.1°C to 155.8°C, what is the specific heat of the new alloy?
A new alloy is designed for use in a car radiator. If the 17.6 kg radiator required 8.69 × 105 J of heat to warm from 22.1°C to 155.8°C, the specific heat of the new alloy is 369.2 J / kg °C.
Specific heat formula is given as :
Q = mcΔT
given that :
mass , m = 17.6 kg
Q = 8.69 × 10⁵ J
ΔT , change in temperature = 22.1 °C - 155.8 °C = 133.7 °C
c = specific heat = ?
Substituting the values in the formula we get:
Q = mcΔT
c = Q / mΔT
c = 8.69 × 10⁵ J / 17.6 kg × 133.7 °C
c = 8.69 × 10⁵ J / 2353.12 kg °C
c = 369.2 J / kg °C
Thus, A new alloy is designed for use in a car radiator. If the 17.6 kg radiator required 8.69 × 10⁵ J of heat to warm from 22.1°C to 155.8°C, the specific heat of the new alloy is 369.2 J / kg °C.
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Convert 6.13 mg per kg determine the correct dose in g for 175lb patient
The correct dose for a 175 lb patient would be approximately 0.48602 grams.
To convert 6.13 mg/kg to grams, we need to consider the weight of the patient and perform a unit conversion. Here's the step-by-step process:
1. Convert the weight of the patient from pounds to kilograms.
175 lb * (1 kg / 2.205 lb) = 79.37 kg (rounded to two decimal places)
2. Calculate the correct dose in grams by multiplying the patient's weight by the given dosage.
79.37 kg * 6.13 mg/kg = 486.02 mg
3. Convert the dose from milligrams (mg) to grams (g) by dividing by 1000.
486.02 mg / 1000 = 0.48602 g (rounded to five decimal places)
Therefore, the correct dose for a 175 lb patient would be approximately 0.48602 grams.
It's important to note that this calculation assumes the dosage is based on body weight and that the given dosage is appropriate for the patient's condition. Always consult a healthcare professional or follow the instructions of a medical prescription for accurate dosing information.
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Indicate the substance that contains the most negatively charged anion. O Mg3N2 O Al 203 O BaCl2 O Srs
Answer:
Mg3N2
Explanation:
How are radiation levels kept in balance?
Outgoing
Earth emits
Back toward the sun in the form of
Answer:
Explanation:We known that Earths energy machine is driven by sunlight which acts as fuel for this machine and to strike a balance between outgoing long wave radiation and short wave radiation there are many factors which are involved in this process.Sun emits this energy in the form of short wave radiation because of the huge energy it has and short wave radiation are higher in energy.Hence, they reach the earth surface mostly as visible and UV rays.After reaching the earths surface what happens with these rays is that they get absorbed by the clouds and other constituents of Earth.
Now, this energy needs to be emitted back in to space in order to balance out the energy budget of earth and that is why this energy is emitted back as long wave radiation which have less energy and also earth has less energy unlike the sun.Loss of this energy is essential as Earth looses most of its energy through this and results in cooling.But when this OLR decreases it should be a cause of concern for us.
This imbalance is caused by a wide range of different human induced activities which has a cumulative effect on the temperature of earth.These activities gives rise to a huge gain in the CO2 concentration which is why this word has gain so much popularity and a cause of widespread concern for us.At community level we contribute to this heating by increasing usage of personal automobiles rather than going for public transport , advancement in technology has greatly changed our lifestyles making it more simpler and easier but this demands more energy consumption.Landscape changes are one of the most important because its taking place at a faster rate.Most of the land being cleared off to built new houses which means clearing off the existing vegetation which leads to temperature rise.Setting up of Industry depending on its type can reduce the amount of OLR escaping the surface by introducing more amount of GHGs in to the atmosphere.
Its these small communities which add up to become the entire human population causing a massive damage and hence at community level if people realize and take necessary steps things will start to change.
What is the electrolyte capacity when an ionic compound disolves a little bit in water?
A. Strong electrolyte
B. Weak electrolyte
C. non-electrolyte
D. Covalent electrolyte
The electrolyte capacity when an ionic compound dissolves a little bit in water is a weak electrolyte (option B).
What is an electrolyte?An electrolyte is a substance that, in solution or when molten, ionizes and conducts electricity.
An electrolyte can either be weak or strong. A weak electrolyte is a solution in which only a small fraction of the dissolved solute exists as ions while a strong electrolyte is is an electrolyte that dissolves almost completely in water.
Therefore, it can be said that electrolyte capacity when an ionic compound dissolves a little bit in water is a weak electrolyte.
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Answer:
A
Explanation:
Which of the following best describes the third law of thermodynamics?
A) U(univ) = U(sys) + U(surr)
B) S* = 0 for perfect Li(s) at 0 K
C) S (univ) > 0 (spontaneous process)
D) SH(rev)/T at constant T
E) G=H-TS
Consider 5.00 L of a gas at 365 mmHg and 20. ∘C . If the container is compressed to 2.30 L and the temperature is increased to 40. ∘C , what is the new pressure, P2, inside the container? Assume no change in the amount of gas inside the cylinder.
Answer:
P₂ = 1.12 atm
Explanation:
To find the new pressure, you need to use the Combined Gas Law:
\(\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}\)
In this equation, "P₁", "V₁", and "T₁" represent the initial pressure, volume, and temperature. "P₂", "V₂", and "T₂" represent the new pressure, volume, and temperature. Before plugging the values into the equation, you need to
(1) convert the pressure from mmHg to atm (760 mmHg = 1 atm)
(2) convert the temperatures from Celsius to Kelvin (°C + 273)
The final answer should have 3 sig figs like the given values.
P₁ = 365 mmHg / 760 = 0.480 atm P₂ = ? atm
V₁ = 5.00 L V₂ = 2.30 L
T₁ = 20°C + 273 = 293 K T₂ = 40°C + 273 = 313 K
\(\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}\) <----- Combined Gas Law
\(\frac{(0.480 atm)(5.00 L)}{293 K}=\frac{P_2(2.30 L)}{313 K}\) <----- Insert values
\(0.00819=\frac{P_2(2.30 L)}{313 K}\) <----- Simplify left side
\(2.56 = P_2(2.30L)\) <----- Multiply both sides by 313
\(1.12 = P_2\) <----- Divide both sides by 2.30
Define density. Plz help me
why does humans are afraid of the dark
Answer:
Because in Dark it will be fully dark and we cannot see any thing
16. As he developed his periodic table, Mendeleev grouped the elements lithium,
sodium, and potassium together. What observation was likely a factor in his decision
to group these elements?
Answer:
the reactivity and the valence electrons
Explanation:
the reactivity of the elements would have played a significant role in why such elements were grouped together. the number of valence electrons dictates how reactive an element is - the less valence electrons the more reactive it is. the column, group 1 in which these elements are put together in, show that each of the elements have 1 valence electrons and are therefore reactive.
you can go on to further explain what valence electrons are, explain what the group numbers are associated with the valence electrons and how valence electrons effect reactivity. further this, talk about how the three elements have the same number of valence electrons and therefore were grouped together
Can someone please help me answer this
Answer:
yiur mom
Explanation:
d
how to separate crystals from solution
Answer:
If a saturated hot solution is allowed to cool, the solute is no longer soluble in the solvent and forms crystals of pure compound. Impurities are excluded from the growing crystals and the pure solid crystals can be separated from the dissolved impurities by filtration.
What is the volume, in liters, of 0.350 mol of nitrogen gas at 32°C and
0.980 atm of pressure? *
A. 9.85 L
B. 8.94 L
C. 104.6 L
D. 0.94 L
Answer: The volume is 8.94 L.
Explanation:
Given: no. of moles = 0.350 mol, Pressure = 0.980 atm
Temperature = \(32^{o}C = (32 + 273) K = 305 K\)
Formula used to calculate the volume is as follows.
PV = nRT
where,
P = pressure
V = volume
n = number of moles
R = gas constant = 0.0821 L atm/mol K
T = temperature
Substitute the values into above formula as follows.
\(PV = nRT\\0.980 atm \times V = 0.350 mol \times 0.0821 L atm/mol K \times 305 K\\V = 8.94 L\)
Thus, we can conclude that the volume is 8.94 L.
Which of these waves has the greatest wavelength? (3 points) Wave shown with 2 wavelengths. Wave shown with 3 wavelengths. Wave shown with 1 wavelength stretch over a short distance. Wavelength shown with 1 wavelength stretched over a long distance.
The waves that has the greatest wavelength is Wavelength shown with 1 wavelength stretched over a long distance.
Waves explained.A wave could be a disturbance or variety that voyages through a medium or space, carrying vitality without transporting matter. Waves can take different shapes and happen totally different sorts of waves, counting mechanical waves and electromagnetic waves.
Mechanical waves require a medium to propagate, meaning they require a substance like water, discuss, or a strong fabric to transmit the wave. Illustrations of mechanical waves incorporate water waves, sound waves, and seismic waves. In these waves, particles of the medium sway or vibrate in a design, exchanging energy from one molecule to another.
Electromagnetic waves, on the other hand, don't require a medium and can travel through vacuum, such as in space. Electromagnetic waves comprise of electric and attractive areas swaying opposite to each other and to the heading of wave engendering. Illustrations of electromagnetic waves incorporate obvious light, radio waves, microwaves, infrared waves, bright waves, X-rays, and gamma beams.
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Which of the following is an example of a force that acts at a distance?
a. a bear walking through the woods b.a jet ski skimming across the water c. a leaf falling off of a tree to the ground d. a tennis ball hit by a tennis player’s racket
Answer: D
Explanation:
Forces can be divided into those that act by direct contact—such as when you push on a door to open it—and those that act at a distance, where there is no apparent physical contact between the objects. Magnetism, and electrical charge, and gravitation are examples of forces that act at a distance.
Answer:
That is wrong you are suppose to choose one
Explanation: love
Determine what product will be produced at the negative electrode for the following reaction:
2KCl(aq) + 2H20(1) -> H2(g) + Cl2(g) + 2KOH(aq)
A. H2
B. Cl2
с. КОН
D. K
Answer:
Choice A. \(\rm H_{2}\) would be produced at the negative electrode.
Explanation:
Ionic equation for this reaction:
\(2\, {\rm K^{+}} + 2\, {\rm Cl^{-}} + {2\, \rm H_{2} O} \to {\rm H_{2}} + {\rm Cl_{2}} + 2\, {\rm K^{+}} + {\rm 2\, OH^{-}}\).
Net ionic equation:
\(2\, {\rm Cl^{-}} + 2\, \rm H_{2} O} \to {\rm H_{2}} + {\rm Cl_{2}} + 2\, {\rm OH^{-}}\).
Half-equations:
\(2\, {\rm Cl^{-}} \to {\rm Cl_{2}} + 2\, {e^{-}}\).
(Electrons travel from the solution to an electrode.)
\(2\, {\rm \overset{+1}{H}_{2} O} + 2\, {e^{-}} \to \overset{0}{\rm H}_{2} + 2\, {\rm O\overset{+1}{H}\!^{-}}\).
(An electrode supply electrons to the solution to reduce some of the \(\rm H\) atoms from \(\rm H_{2}O\).)
In a DC circuit, electrons always enter the circuit from the negative terminal of the power supply and return to the power supply at the positive terminal.
The negative electrode is connected to the negative terminal of the power supply. Electrons from the power supply would flow into the solution through this electrode.
This continuous supply of electrons at the negative electrode would drive a reduction half-reaction. In this question, that corresponds to the reduction of water: \(2\, {\rm \overset{+1}{H}_{2} O} + 2\, {\rm e^{-}} \to \overset{0}{\rm H}_{2} + 2\, {\rm O\overset{+1}{H}\!^{-}}\). Hence, \(\rm H_{2}\) would be produced at the negative electrode.