Answer:
Number two answer is accuracy
potential acute health effects of hydrochloric acid___
Answer: The health effects of hydrochloric acid are eye, nose, and respiratory tract irritation or inflammation, pulmonary edema. I hope this helps!
Explanation: This is otherwise known as Acute inhalation exposure.
sig figs please help
estimate the boiling point of a 2m solution of nacl in water.
The boiling point of a 2m solution of nacl in water is >100 °C. The boiling point elevation formula may be used to calculate the boiling point of a 2 M solution of NaCl in water.
Tb = Kb x m, where Kb is the boiling point elevation constant for water. >100 °C (Since the boiling point for water is 100 °C, we would expect for the boiling point of the aqueous solution to be greater than 100 °C.) which is 0.52 K kg/mol. Because the molality of a 2 M solution of NaCl is 2 mol/kg, the anticipated change in boiling point is: Tb = 0.52 K kg/mol multiplied by 2 mol/kg = 1.04 K Because the average boiling point of pure water is 100 °C (at 1 atm), the anticipated boiling point of the 2 M NaCl solution in water is:Temperature at which water boils The boiling point elevation formula may be used to calculate the boiling point of a 2 M solution of NaCl in water. Tb = Kb x m, where Kb is the boiling point elevation constant for water. the boiling point of a 2m solution of nacl in water.
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The complete question is:
Estimate the boiling point of a 2M solution of NaCl in water.
A. 100 °C
B. >100 °C
C. <100 °C
What is the name for the conditions when the
temperature is equal to 273 Kelvins (K) and the pressure
is equal to 1 atmosphere (atm)?
Answer:
The conditions when the temperature is equal to 273 Kelvins (K) and the pressure is equal to 1 atmosphere (atm) is known as the "Standard temperature and pressure" (STP) and not the "Triple point" of water.
STP is a standard reference point used in physics and chemistry to compare and describe the properties of different substances.
STP is an abbreviation for Standard Temperature and Pressure, which is 273 K (0 degrees Celsius) and 1 atm pressure (or 105 Pa). STP describes standard conditions and is frequently used to calculate gas density and volume based on the Ideal Gas Law. In this case, 1 mole of an ideal gas takes up 22.4 L.
What do you mean by STP ?The nominal conditions in the atmosphere at sea level are referred to as standard temperature and pressure (STP). These are the conditions: 0 degrees Celsius and 1 atmosphere (atm).
STP is an abbreviation for standard pressure and temperature, whereas NTP is an abbreviation for normal pressure and temperature.
According to IUPAC, the STP value of pressure and temperature for gas is 273.15 K and 0.987 atm, respectively. NTP pressure and temperature are 293.15 K and 1 atm, respectively.
Thus, STP is the name for the conditions when the temperature is equal to 273 Kelvins (K) and the pressure is equal to 1 atmosphere (atm).
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As a quartz pebble is transported by a stream, thepebble will become more rounded as a result ofA) dissolving as water is running over the rockB) abrasion by colliding with other rocksC) deposition in well-sorted layersD) resistance to weathering and erosion
Correct option is B, The quartz pebble is rounded throughout its passage through the stream as a result of abrasion by colliding with other rocks.
What exactly does abrasion entail?In the subglacial environment, abrasion is accomplished by the sliding of debris-charged ice across the substrate. Abrasion is the process of (frictional) wear, caused by surfaces rubbing against each other.
The collision of the rock and pebble caused the pebbles to be transported through the stream. The surge in between them is caused by the rock and clashing. As a result, the edges will break off and the pebble will become smoother and rounder. Abrasion weathering is the term used to describe this form of weathering.
As a result of abrasion weathering brought on by the quartz pebble's impact with the rocks, it becomes round as it travels through the stream.
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If you have 92 grams of a substance with a formula mass of 261.887 g/mol, how many moles do you have?
If a substance contains 92 gram with a molar mass of 261.887 g/mol then it will have .351 moles of substance.
What is moles?A substance's mole number is equal to the ratio of its given mass in a chemical reaction to the mass of one mole of that substance. A mole of any substance is equal to Avogadro's number, which is 6.023 1023. It's also used to express concentrations like mole per litre or molecular weight.The molar mass is calculated by dividing the mass of a given chemical element or chemical compound (g) by the amount of substance (mol). A compound's molar mass can be calculated by adding the standard atomic masses (in g/mol) of its constituent atoms.No. of moles of an atom = Given mass ÷ Molar mass
Here given mass = 92grams
Molar mass = 261.887 g/mol
By substituting the values,
Number of moles = 92 /261.887
Number of moles = 0.351 mol
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a region in an atom where there is a high probability of finding electrons
Atomic orbitals are the regions of space around the nucleus of an atom where there is high probability of an electron to be found.
Atomic orbitals are the mathematical functions that provide an insight into the wave nature of electrons (or pairs of electrons) that exist around the nuclei of atoms. In the field of quantum mechanics and that of atomic theory, these mathematical functions of atoms are often employed in order to determine the probability of finding an electron (positive charged particles belonging to an atom) in a specific region, around the nucleus of the atom.
The characteristics of each atomic orbital of an atom are dependent upon the values of the following three quantum numbers:
The principal quantum number (denoted by the symbol ‘n’)The azimuthal quantum number (denoted by the symbol ‘l’), which is also known as the orbital angular momentum quantum number.The magnetic quantum number (denoted by the symbol ‘ml’)Furthermore, it has to be noted that each atomic orbital can hold a maximum of two electrons in itself. In completely occupied/filled atomic orbitals, i.e. the atomic orbitals containing two electrons, each of the two electrons has an equal and opposite spin, as when compared to the other.
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Calculate q, the heat released in each reaction.
Use the equation q = cmAT.
(Use c = 4.18 J/g °C and the total mass, m.)
Record to 2 significant figures.
Reaction 1: blank J
Reaction 2: blank J
The heat released in each reaction is:
Reaction 1: 3700J
Reaction 2: 3200J
What is heat?
Heat is a transfer of kinetic energy from one medium or object to another or from an energy source to a medium or object. A similar energy transfer can be done in three ways: radiation, conduction, and convection.The standard unit of heat in the International System of Units( SI) is the calorie( cal), which is the quantum of energy transferred needed to raise the temperature of one gram of pure liquid water by one degree Celsius, assuming that the temperature of the water is advanced. advanced than the freezing point and lower than the boiling pointTo know more about heat, click the link given below:
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the empirical formula for trichloroisocyanuric acid, the active ingredient in many household bleaches, is ocncl. the molar mass of this compound is 232.41 g/mol. what is the molecular formula of trichloroisocyanuric acid?
Answer:
C3Cl3N3O3
Explanation:
The "trichloro-" tells us there are 3 chlorines (Cl).
Set up a table of the elements along with their molar masses, See the attached spreadsheet.
By changing the number of each atom, we can calculate the resulting molar mass, shown at the lower right, in green. One can try various numbers for each element in the compound, but understand the chemistry helps.
The 3 Cl atoms add 106.4 g/mole to the total of 232.4 g/mole. I know there are probably 3 carbon atoms, and that adds another 36.0 g/mole. The remaining 90.0 g/mole must consist of N and Cl atoms. 3 N atoms would contribute 42.0 g/mole, leaving 42 g/mole. Oxygen has a molar mass of 16 g/mole, so if we add 3 O atoms, that would make up the remaining 42.0 grams/mole.
This would not be easy to do without more information, but I had a sense for what the structure might look like, and went with those guesses, to arrive at C3Cl3N3O3
Fill in the words to complete each step in liquid spill cleanup. 1 cover the spill. 1. Surround the area with ____ absorbent material 2. Scoop up the material and place in a ____ 3. Place the bagged waste in a ____ 4. Wipe down the area with _____
The words to complete the sentence are :
1) he Absorbent material
2) The Plastic bag
3) The solid waste container
4) The Detergent and the water
The complete sentences in the spill cleanup are :
1) The step in liquid spill cleanup.
Surround the area with "Absorbent material", then cover the spill.
2) The step in liquid spill cleanup.
Scoop up the material and place in a "plastic bag".
3) The step in liquid spill cleanup.
Place the bagged waste in a "solid waste container".
4) The step in liquid spill cleanup.
Wipe down the area with "detergent and the water".
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Please help please nowww pleaseee
What is H2O formula?.
Answer:
The basic molecular formula for water, H₂O, suggests a simple structure of three atoms in a straight line. But the physical properties of the three atoms force another arrangement — a “V” shape with oxygen at the point. This nonlinear shape transforms water into a remarkable substance with astounding abilities.
Explanation:
(◕ᴗ◕✿)(◕ᴗ◕✿)(◕ᴗ◕✿)
Show how to balance the following chemical equation.Potassium metal and chlorine gas combine to form potassium chloride.
Here is the balanced chemical equation for the given reaction-
2 K (s) + Cl₂ (g) ⇒ 2 KCl (s)
Steps to balance a chemical equation are-
1. Write the unbalanced chemical equation.
2. Write down the number of atoms of each element present on both reactant as well as product side.
3. Add the coefficients to balance mass in a chemical equation
First balance Chlorine and then Potassium by the trial and error method.Add a stoichiometric coefficient of 2 on the product side to first balance the chlorine atomsThen for balancing the K atoms, you can add 2 on the reactant side and it will balance the whole reaction which will be given by-2 K (s) + Cl₂ (g) ⇒ 2 KCl (s)
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if the atmospheric pressure in the laboratory is 1.2 atm, how many moles of gas were in each syringe?
room temp water (temp): 21.5°C
room temp water (volume (mL) Air): 5.03
The moles of gas were in each syringe exists 2.583 x 10⁻⁴ mol.
How to estimate the moles of gas were in each syringe?Given: Temperature of water (H₂O) = 21.3°C
Convert Temperature to Kelvin
T = °C + 273
substitute the values in the above equation, we get
T = 21.3 + 273 = 294.3 K
volume of (H₂O) gaseous state = 5.1 mL
Convert mL to liter
1000 mL = 1 L
5.1 ml = 5.1/1000 = 0.0051 L
Pressure = 1.2 atm
Number of moles can be calculated by using ideal gas formula
PV = nRT
Rearrange the equation for number of moles
n = PV / RT . . . . . . . . . (1)
Let P be the pressure
V be the Volume
T be the Temperature
n be the Number of moles
R be the ideal gas constant
Where, R = 0.08206 L. atm / mol. K
Substitute the value in formula (1) to estimate number of moles
n = 1.2 atm x 0.0051 L / 0.08206 L.atm.mol⁻¹. K⁻¹ x 294.3 K
simplifying the equation, we get
n = 0.0061 atm. L / 24.162 L.atm.mol⁻¹
n = 2.525 x 10⁻⁴ mol
no. of moles of gas (H₂O) = 2.525 x 10⁻⁴ mol
Part B:
Temperature of water (H₂) = 21.3°C
Convert Temperature to Kelvin, we get
T = °C + 273
T = 21.3 + 273 = 294.3 K
volume of (H₂) gas = 5.2 mL
Convert mL to liter
1000 mL = 1 L
5.2 ml = 5.2/1000 = 0.0052 L
Pressure = 1.2 atm
no. of moles can be calculated by using ideal gas formula
PV = nRT
Rearrange the equation for no. of moles
n = PV / RT . . . . . . . . . (1)
where, R = 0.08206 L. atm / mol. K
substitute the value in formula (1) to estimate number of moles
n = 1.2 atm x 0.0052 L / 0.08206 L.atm.mol⁻¹. K⁻¹ x 294.3 K
simplifying the equation, we get
n = 0.0062 atm. L / 24.162 L.atm.mol⁻¹
n = 2.583 x 10⁻⁴ mol
Number of moles of gas (H₂) = 2.583 x 10⁻⁴ mol
The complete question is:
If the atmospheric pressure in the laboratory is 1.2 atm, how many moles of gas were in each syringe?
Air(H2O) syringe
Room temperature water at 21.3 degrees Celsius
Volume of 5.1 mL
Hydrogen(H2) syringe
Room temperature water at 21.3 degrees Celsius
Volume of 5.2 mL
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The substances at the start of a chemical reaction that change to other substances are known as _______?
The substances at the start of a chemical reaction that change to other substances are known as reactants.
What is a Chemical reaction ?
When one or more chemicals are transformed into one or more other compounds, a chemical reaction takes place. Example: the formation of rust when iron and oxygen combine. Sodium acetate, carbon dioxide, and water are produced when vinegar and baking soda are combined.
Reactants are the substance(s) in a chemical equation to the left of the arrow. A component that is present at the outset of a chemical reaction is known as a reactant. Products are the substance(s) to the right of the arrow. A substance that remains after a chemical reaction is complete is known as a product.
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a student is conducting a laboratory experiment with sulfur hexafluoride with a molar mass of 146.07 g/mol . however, the student did not complete the required pre-laboratory notes.
A microscopic view of animal tissue is shown. Epithelial tissue is the kind of animal tissue that is depicted in the picture. The right answer is A.
Epithelial tissue, which coats internal organs and cavities and gives birth to glands, covers the surface of the body. The cells in epithelial tissue often have regular shapes and sizes and frequently follow a recognisable pattern. The tissue in the picture appears to be made up of cells that are layered, evenly shaped, sized, and arranged in a single layer, similar to epithelial tissue. As a result, choice A, "Epithelial tissue," is correct. In order to improve the retrieval, access, dissemination, and dissemination of institutional information in the field of health, it seeks to standardise and enhance terminology, concepts, and acronyms. Clinical classifications, vocabularies, and terminologies are standardised collections of ideas (and their synonyms) for registering health-related occurrences and interventions in sufficient detail to facilitate the delivery of healthcare.
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Energy in Chemical Reactions II Unit Test
NEED HELP FAST
1. A scientist wants to perform a reaction in a vacuum chamber to control the experiment as much as possible and to prevent other variables from impacting the reaction. The scientist is trying to determine if the reaction is endothermic or exothermic and measure how much energy is absorbed or given off. Is this a valid approach? Why or why not? In three to five sentences, explain your reasoning.
2. A chemist wants to observe the following reaction:
2H2 + O2 → 2H2O
The chemist is standing inside a room with oxygen in the air and has a balloon filled with hydrogen. The chemist holds a small flame up to the hydrogen balloon. When the balloon pops, the hydrogen explodes in a ball of fire.
Based on what you know about breaking and forming bonds, explain which part of the reaction is higher in energy (i.e., does it take more energy to break the bonds of the reactants, or is more energy given off when the product bonds are formed?). Defend your answer in three to five sentences.
3. A scientist studies the bond energies of different compounds containing nitrogen (N). The scientist observes that the N–N bonds in one group of compounds have a bond energy of 209 kJ/mol, while the N–N bonds in another group of compounds have a bond energy of 418 kJ/mol. In one or two sentences, hypothesize a reason for this difference.
Answer:
1.) A vacuum chamber is a valid approach to control the experiment and prevent other variables from impacting the reaction. However, the scientist should be careful in interpreting the results since the reaction might be different in a vacuum than in air. A vacuum can affect the rate of reaction and the thermodynamics of the reaction, which might make it difficult to determine if the reaction is endothermic or exothermic.
2.) The reaction 2H2 + O2 → 2H2O is exothermic because it releases energy. When the bonds in the hydrogen molecule break, a large amount of energy is released, and when the hydrogen and oxygen molecules combine to form water, the energy released is greater than the energy required to break the bonds. This results in a net release of energy and makes the reaction exothermic.
3.) The difference in bond energies of N–N bonds in different compounds could be due to the presence of different chemical groups around the nitrogen atoms. These chemical groups can influence the bond strength between the nitrogen atoms, causing the bond energy to vary. Additionally, different bonding arrangements, such as single or double bonds, could also contribute to the difference in bond energy.
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can the light independent reactions occur when light is present?
The light independent reactions occur when light is present with NADPH and ATP.
What is light independent reactions?
Carbon dioxide and energy in the form of ATP and NADPH are the prerequisites or components for light-independent processes. The light-independent processes consume these necessary components and produce glucose. The energy carriers that return from these reactions to the ones that depend on light are ADP and NADP+.
What is reactions ?
The conversion of one or more chemicals, known as reactants, into one or more new compounds, known as products, is referred to as a chemical reaction. when two or more substances interact, the arrangement of their atoms or molecules changes, resulting in the formation of one or more new substances.
Therefore, light independent reactions occur when light is present with NADPH and ATP.
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Predict the polarity of 6 real molecules (O2, HF, H2O, NH3, CF4, CH3F). First, draw the
molecules and any bond dipoles. Then draw any molecular dipoles. Explain your
reasoning before you check your predictions with the simulation.
The polarity of 6 real molecules are given below,
O2- Neutral
HF- Acidic
H2O- Neutral
NH3- Basic
CF4-Nonpolar
CH3F- Polar
How to determine polarity of molecules?Predicting the polarity of molecules can be done using a variety of methods. One method is to use the molecular dipole moment, which is a measure of the separation of positive and negative charge in a molecule. Molecular dipole moments can be calculated using quantum chemistry methods such as Density Functional Theory, or other methods. Another method is to consider the electronegativity of the atoms in the molecule and the type of bond between them. Non-polar molecules have atoms with similar electronegativities and strong covalent bonds, while polar molecules have atoms with different electronegativities and polar covalent or ionic bonds. Finally, the polarity of a molecule can also be predicted by looking at its shape and symmetry. Non-polar molecules often have symmetrical shapes, while polar molecules tend to be asymmetrical.To learn more about polarity of molecules refer :
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Zuri finds that sample A and B are shiny and can be hammered. Sample A is hard. Sample C and D are dull. Sample C is a liquid and sample D is brittle. Choose the correct option from the following Group of answer choices Samples A and B are metals, and samples C and D are nonmetals. Samples A, B, C, and D are all metals. Samples A, B, C, and D are all nonmetals. Samples A and B are nonmetals, and samples C and D are metals.
Samples A and B are metals, and samples C and D are nonmetals.
What is the nature of the materials?We have to note that the appearance of the object can be used to determine the kind of object that it is. We know that a metal would always have a luster and the exception here is only mercury that is a liquid metal.
On the other hand, the non metals are either liquid or they are solids that are brittle and would have a low melting and boiling point due to the lack of a crystalline structure.
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Phosphorous-32, what would the mass of one mole of this element be?
describe where
the energy is coming from and how it is affecting change or putting an object into motion
help me and fast
The energy is coming from the battery that is in the torchlight.
In the case of an object in motion, energy is coming from the kinetic energy of the object. Kinetic energy is the energy an object possesses due to its motion. This energy is transferred to the object by an external force, such as a push or a pull, which causes the object to start moving or to change its motion.
What is the energy about?Energy is the ability to do work and can take many forms, such as thermal, kinetic, potential, and chemical energy. Energy can be transformed from one form to another and can also be transferred from one object to another.
Therefore, In the case of an object being put into motion, energy is coming from the potential energy of the object. Potential energy is the energy an object possesses due to its position or configuration. This energy is transferred to the object by an external force, such as gravity, which causes the object to start moving or to change its motion.
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How many grams of oxygen are required to react with 20. 0 grams of octane (c8h18)?.
70g of oxygen are required to react with 20. 0 grams of octane
What does the law of conservation of mass mean?
According to the law of conservation of mass, mass is neither generated nor destroyed during a chemical process. For instance, when coal is burned, the carbon atom in it transforms into carbon dioxide. The carbon atom transforms from a solid to a gas, yet its mass remains constant.
Every chemical equation must have a product mass that is equal to the reactant mass in accordance with the law of conservation of mass. Therefore, every element must have the same amount of atoms on both sides of the equation.
2C8H18 + 25O2 → 16CO2 + 18H2O
2 moles of octane will be 2*114g i.e. 228g
25 moles of oxygen will be 25*32g i.e. 800g
228 g of octane reacts with 800 g of Oxygen,
So 20g of octane reacts with (800/228)*20g of Oxygen i.e. 70g
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3. Explain how the discovery of electrons and their arrangement in atoms gave further support to
Mendeleev's ideas.
The discovery of electrons and their arrangement in atoms gave further support to Mendeleev's ideas by providing a more detailed understanding of the structure of atoms and the way in which they interact with one another.
Mendeleev proposed that elements are arranged in the periodic table according to their atomic weight and chemical properties. This arrangement allows for patterns and trends to be observed in the properties of elements and helps to predict the properties of elements that had not yet been discovered.
The discovery of electrons, which are negatively charged particles that orbit the nucleus of an atom, and their arrangement in atoms provided a more detailed understanding of the structure of atoms and the way in which they interact with one another.
It was found that the number of electrons in the outermost shell of an atom, known as the valence electrons, determines the chemical properties of an element. The number of valence electrons is related to the position of an element in the periodic table, with elements in the same group having the same number of valence electrons
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c) Calculate the frequency of light required to remove the valence electron(s).
The frequency of light required to remove the valence electron(s) from an atom is known as the ionization energy. The ionization energy is dependent on the atomic structure and is specific to each element.
What is calculation of frequency of light?This energy can be calculated using the equation: E = hf = hc/λ, where E is the ionization energy, h is Planck's constant, f is the frequency of the light, c is the speed of light, and λ is the wavelength of the light.E = hf = hc/λwhere E is the ionization energy, h is Planck's constant, f is the frequency of the light, c is the speed of light, and λ is the wavelength of the light.To calculate the frequency of light required to remove the valence electron(s) from an atom, the ionization energy of the atom must be known, and then the equation can be rearranged to solve for frequency:f = E/h = hc/λEIt is important to note that the ionization energy for each element is unique and can be found in periodic table or in the reference book.To learn more about frequency of electron refer:
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Changing the Amount of Epsom Salt
In this task, you will carry out the chemical reaction between Epsom salt and
2NH3+ MgSO4 + 2H₂O → Mg(OH)2 + (NH4)2SO4.
This time, you'll use varying amounts of Epsom salt to see how the amount o
of product. Review these lab safety requirements before you begin.
Estimated time to complete:
Total time: at least 8 hours
Active time: 1 hour
If you're using an Edmentum lab kit, remove the safety goggles, protective glo-
These materials are italicized in the following list. In addition to the kit materia
appearing in the list. If you aren't using an Edmentum lab kit or do not have ac
check with your teacher for help.
Put on safety goggles and protective gloves.
Changing the Amount of Epsom SaltMaterials-Safety goggles-Protective gloves-Beaker-Graduated cylinder-Stirring rod-2NH3-MgSO4-2H₂O-Epsom salt-Test tubes-Test tube rack-ThermometerProcedurePut on safety goggles and protective gloves.Measure out 2NH3, MgSO4, 2H₂O, and Epsom salt in separate beakers.Pour the measured amounts of each chemical into a test tube, in the following order: 2NH3, MgSO4, 2H₂O, and Epsom salt.Secure the test tube in a test tube rack.Heat the contents of the test tube to 80°C, using a thermometer to monitor the temperature.Stir the contents of the test tube with a stirring rod until all of the Epsom salt has dissolved.Allow the solution to cool to room temperature.Repeat steps 2-7, using different amounts of Epsom salt for each trial.To learn more about Changing the Amount of Epsom Salt refer to:
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Which of these renewable resources results in an increase in pollution when used to produce energy?
a. water
b. wind
c. biomass
d. geothermal
When utilized to produce electricity, biomass, a renewable resource, increases pollution.
Which clean energy sources are polluting?Of all the available renewable energy sources, biomass produces the most pollution. Significant air pollution can be produced by burning wood, solid trash, and leftover plant material used in food production.
Biological waste produces pollution?According to Buonocore, a research scientist at the Center for Climate and Health, "air pollution from burning biomass can induce asthma exacerbations, hospitalizations for heart attack and respiratory disease, birth defects, neurological diseases, and mortality, among many other health implications."
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Is HCl polar covalent?.
HCl is a polar covalent compound.
The H-Cl bond is covalent, meaning that the electrons are shared between the hydrogen and chlorine atoms. However, the electron density is not evenly distributed between the two atoms. The chlorine atom is more electronegative than the hydrogen atom, meaning it attracts electrons more strongly. This causes the electrons to be more concentrated around the chlorine atom, creating a partial negative charge on the chlorine atom and a partial positive charge on the hydrogen atom. This uneven distribution of charge makes HCl a polar covalent compound.
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Given the system , which is true? the system has no solutions. The system has exactly one solution. The system has exactly three solutions. The system has an infinite number of solutions.
There is just one solution for the system. The best choice is B.
What exactly is an equation system?A set of simultaneous equations, often known as a system of equations or an equation system, is a finite set of equations for which common solutions are sought.
If we plot the graph of the linear equation, we will get a straight line because an equation is defined as the relationship between two variables.
Calculate the equation's determinant to determine if a system of equations has one solution or none at all.
The square matrix's entries determine the determinant, a scalar quantity. It makes it possible to describe a few features of the matrix and the linear map that the matrix symbolises.
By constructing the matrix from the provided constants using the equation, the determinant will be determined.
[tex]\left[\begin{array}{ccc}-1&-3&-4\\-1&2&-4\\2&-1&5\end{array}\right][/tex]
D = -1( 10 - 4 ) +3( -5 + 8) -4 ( 1 - 4)
D =-6 + 9 + 12
D = 15
Hence, the system has exactly one solution.
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Complete Question -
Given the system
-x-3y – 4z=2
-x+2y-4z = 0, which is true?
2x-y+ 5z = 1
a)The system has no solutions.
b)The system has exactly one solution.
c)The system has exactly three solutions.
d)The system has an infinite number of solutions
Both iron and copper are metals that are considered good conductors of electricity. However, copper
wires are preferred to iron wires for electrical connections. With reference to the factors affecting
resistance, can you explain why copper is preferred over?
Answer:
Because its prictects that's why people pefer copper wires
