x has the values (2.14 + √(23.288)) / 9.56 and (2.14 - √(23.288)) / 9.56.
What Is a Quadratic Equation?Quadratic equations are the degree two, one-variable polynomial equations of the form f(x) = ax^2 + bx + c = 0 with a, b, c, and R R and a 0 being the variables. In its most basic form, it is a quadratic equation where "a" denotes the leading coefficient and "c" is the absolute term of f(x). The values of x that satisfy the equation (, ) are the quadratic equation's roots.
The name "quadratic equation" is for what?Intricate relationships exist between square and quadrangle (another name for rectangle) difficulties and quadratic equations.
The Latin term quadratus, which means square, is where the word "quadratic" originates.
The quadratic formula or factoring can be used to get the solution to the problem 4.78x^2-2.14x-1.60=0.
x = (-b (b^2 - 4ac)) / (2a) where a = 4.78, b = -2.14, and c = -1.60 is the quadratic formula.
Plugging in the values we get:
x = (-(-2.14) ± √((-2.14)^2 - 4(4.78)(-1.60)) ) / (2(4.78))
x = (2.14 ± √(4.6016 + 18.688)) / 9.56
x = (2.14 ± √(23.288)) / 9.56
So the two values of x are:
x = (2.14 + √(23.288)) / 9.56 and x = (2.14 - √(23.288)) / 9.56
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2. How many moles of helium are present in a balloon at STP if the volume is 3.7 L? Please show all work!
Using the Ideal Gas Law equation: [tex]PV=nRT[/tex]
P = pressure (kPa)V = volume (L)n = moles (mol)R = gas constant( [tex]\frac{kPaL}{molK}[/tex])T = Temperature (K)STP also known as Standard Temperature and Pressure is a set of conditions at sea level
At STP:
P = 101.3 kPa
T = [tex]0^o C[/tex] or 273 K
[tex]n=\frac{PV}{RT}[/tex]
[tex]n=\frac{101.3kPa)(3.7L)}{(8.31\frac{kPaL}{molK})(273K)}[/tex]
[tex]n = 0.16 mol[/tex]
select all that apply. please help! i will mark you brainliest
Kinetic energy increases as mass increases
The shape of the mass vs energy graph shows a linear relationship
When we double the mass, we double the energy.
Interpreting a graphThe graph shown in the image is a plot of the kinetic energy of objects on the y-axis and the mass of the objects on the x-axis.
The graph is a straight line. This shows that there is a linear relationship between the two parameters - the kinetic energy and mass of objects. Thus, the kinetic energy increases as mass of objects increases, and decreases as mass of objects increases.
From the graph, when the mass of objects are doubled, there is also a double in the amount of the kinetic energy of objects.
In summary, the graph shows that:
Kinetic energy increases as mass increasesThe shape of the mass vs energy graph shows a linear relationshipWhen we double the mass, we double the energy.More on interpreting graphs can be found here: https://brainly.com/question/28418462
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What is the hydrogen ion concentration of a strong acid which has a pH of 6.3
Answer:
5.0 x 10^-7
Explanation:
[H+]=10^-6.3
SO NOT HALAL MODE :(
Answer:
umm
Explanation:
When you work with a chemical that emits hazardous vapors or fumes, what is the best way to protect yourself
When we work with a chemical that emits hazardous vapors or fumes, the best way to protect ourself is by using the fumes hood when working with chemicals.
The best way to protect ourself from the chemical fumes or vapor is the work with chemicals in the fumes hood. the fume hood is the ventilation device that limits the exposure of the hazardous fumes or the vapors.
There are several other ways to protect ourself from the chemical fumes are :
use the chemicals protective clotheswear the respiratory protectionuse the glovesalso wear the eye protectorThese are the some methods use to protect ourself from the chemical fumes or vapors.
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which of the following is a combustion reaction ? ( please answer asap !! ) <3
Answer: 3
Explanation:
3. Why are fossils so rare?
the conditions needed to form the
fossil are rare
most organisms die when eaten by
others
all organisms form fossils when
they die, we just have not found them
yet
Answer:
fossils are rare bc most dead organisms get decayed by environmental change and decomposers,most fossils are parts of bones and mostly found indry areas like deserts
Give the ΔH value for the combustion of ethanol as shown in the reaction C2H5OH(g)+3O2(g)⟶Δ2CO2(g)+3H2O(g)+1278 kJ .
Express your answer using four significant figures. If the value is positive, do not include the + sign in your answer.
The value of the ΔH for the reaction is obtained as 1278 kJ .
What is the value of ΔH?We have to note that the enthalpy change of the reaction has to do with the heat that ahs been evolved or absorbed in a reaction. In this case we have to obtain the enthalpy change by looking at the combustion reaction that has been shown here.
It is clear that from the thermochemical reaction equation, there is the evolution of about 1278 kJ of heat in the process of the reaction as shown in the question that we have above.
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Hello if anyone could help it would be great. Why is cooler material more dense than warmer material?
If I have 2.00 moles of a gas at a pressure of 0.600 atm and a volume of 12.0 liters, what is the temperature?
Answer:
there it is fella tried on ma own consciousness
Help me please will give brainliest
well excuse the "s" at the end
Name the following straight-chain
alkane.
CH3CH2CH2CH3
A. butane
B. ethane
C. propane
D. methane
Answer:
B. Propane
Explanation:
just did it edge 2022
Iodine Monochloride reacts reversibly with Chlorine to form Iodine Trichloride, What will be the color of the equilibrium mixture
Answer:
Yellow
Explanation:
The color of the equilibrium mixture of Iodine Monochloride and Chlorine is yellow. When the mixture is heated, it becomes darker brown in color.
Which molecular geometry, of an ABn molecule, results in a polar molecule?
O tetrahedral
O trigonal pyramidal
O square planar
O linear
Answer:
trigonal pyramidal
Explanation:
In the case of water.
Which of the following is the strongest type of interaction that occurs between the atoms within the circled areas of the two molecules represented above? A) Polar covalent bond B) Nonpolar covalent bond C) Hydrogen bond D) London dispersion forces
The strongest type of interaction that occurs between the atoms is hydrogen bond.(option c)
A hydrogen atom that is bound to a highly electronegative atom and another highly electronegative atom that is close by interact with one another to form hydrogen bonds, which are an unique kind of attractive intermolecular interactions. This process is known as hydrogen bonding.
As a result of hydrogen bonding, a hydrogen atom simultaneously forms a covalent bond with one electronegative atom and a hydrogen bond with the other. These are the prerequisites for hydrogen bonding:
1.A strongly electronegative atom connected to the hydrogen atom must be present in the molecule. The degree of polarization of the molecule increases with increasing electronegativity.
2.The electronegative atom should have a tiny size. The strength of the electrostatic attraction increases with decreasing size.
So, the hydrogen bonding is the strongest bond.
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What is a strong base
Calcium phosphate, Ca 3(PO 4) 2, is used to treat calcium deficiencies. What is the molar mass of this compound
Ca3(PO4)2 has a molar mass of 310.18 g/mol.
Molar mass: What is it?The sum of the molar masses of a compound's component parts determines its molar mass. The molar masses of calcium, phosphorus, and oxygen must be added up in order to determine the molar mass of Ca3(PO4)2.
The molar mass of calcium is 40.08 g/mol.
The molar mass of phosphorus is 30.97 g/mol.
The molar mass of oxygen is 16.00 g/mol.
There are 3 moles of calcium, 2 moles of phosphorus, and 8 moles of oxygen in the compound Ca3(PO4)2.
As a result, the formula for calculating the compound's molar mass is: 340.08 + 230.97 + 8*16 = 120.24 + 61.94 + 128 = 310.18 g/mol
Consequently, Ca3(PO4)2 has a molar mass of 310.18 g/mol.
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What types of solutions are made when the temperature increases, then decrease?
a. saturated
b. supersaturated
c. unsaturated
A sample of 25L of NH3 gas at 10°C is heated at constant pressure until it fills a volume of 50L. What is the new temperature in °C?
Answer:
293 oC
Explanation:
Make a claim about how exercise affects the balance of salt and water in your body
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Can someone please help me with this question??
Lead absorption is decreased by the presence of ______ in the body. a) calcium and vitamin D b) calcium and iron c) iron and selenium
Answer: Correct option is B . calcium and iron decrease the absorption of lead in the body.
Explanation: calcium and iron decrease the absorption of lead in the body without affecting its solubility,probably by competing for shared absorptive receptors in the intestinal mucosa. The total body burden of lead does not affect lead absorption. Thus, lead does not have a feedback mechanism which limits absorption.
Place the following in order of increasing magnitude of lattice energy:
K2O Rb2S Li2O
least lattice energy < --- --- ---> most lattice energy
I am really struggling with how to calculate lattice energy. So if you could, please explain how you got the answer and how that method could be generalized to other similar questions. I realize it has something to do with the charge product between the elements in the molecule, and secondary to that is the atomic radius... it's just not clicking for me to do on the fly.
Li2O > K2O > Rb2S is the order of given compounds lattice energy in the increasing order
Lattice energy is a measure of the strength of the electrostatic attraction between the positively charged cations and negatively charged anions in an ionic compound. The greater the lattice energy, the stronger the electrostatic attraction and the more stable the compound.The most common method for determining lattice energy is the Born-Haber cycle. This method uses thermochemical data of the individual steps in the formation of an ionic compound to calculate the lattice energy. However, it is often impractical to use this method in a test environment, so a more practical method that is used to compare lattice energies of different compounds is the use of the Coulomb's law which relates the lattice energy to the charge product of the cations and anions and the distance between them.
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What is the total reduction potential of a cell in which sodium (Na) is reduced and zinc (Zn) is oxidized
The total reduction potential of a cell in which sodium (Na) is reduced and zinc (Zn) is oxidized -1.95 V.
The tendency of a chemical species is to be reduced, expressed in volts under normal conditions, is known as the standard reduction potential.
The standard reduction potential belongs to the group of potentials known as standard electrodes or standard cells. The difference in voltage between the cathode and anode is known as the standard cell potential. The standard sodium reduction potential is -2.71V. Zinc has an average reduction potential of -0.76 V. Therefore, the overall reduction potential is 1.95 V.
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No bots!!!!!! When 20.4 g of sodium metal are mixed with chlorine gas, how many g of NaCl are produced?
51.8 g NaCl
Explanation:
2Na(s) + Cl2(g) ---> 2NaCl(s)
20.4 g Na × (1 mol Na/22.9898 g Na) = 0.887 mol Na
0.887 mol Na × (2 mol NaCl/2 mol Na) = 0.887 mol NaCl
0.887 mol NaCl × (58.44 g NaCl/1 mol NaCl) = 51.8 g NaCl
In an experiment, potassium chlorate decomposed according to the following chemical equation.
2 KClO3 → 2 KCl + 3 O2
If the mass of potassium chlorate was 240 grams, what is the mass of oxygen gas formed?
Answer Choices:
A)
94. 03g
B)
1378g
C)
41. 8g
D)
612. 5g
Grams have been employed to estimate the mass of decomposition. Option C is correct, so.
The chemical response is as follows:
Every mole of must be broken to generate one mole of KCl.
180 kilograms of KCl was produced.
KCl produced in moles =
Produced moles of KCl equals moles.
Degradation of the same material is necessary for the creation of moles of KCl.
Therefore, the moles of the must be decomposed = moles.
Decomposition of mass equals moles of molecular weight
122.2 grammes of moles must be degraded from the mass.
Has to be decomposed for the production of 2 moles of KCl =
kilos.
Thus, kilograms has supplied the mass of decomposition. Option C is correct, however.
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What term do we use to describe how bright a star “seems” to us here on Earth?
absolute magnitude
apparent magnitud
Answer:
Apparent magnitude
Explanation:
By definition, Apparent magnitude which is usually denoted by "m" is the measure of the brightness of a star or even other astronomical objects that are observed from Earth. Meanwhile the absolute magnitude is defined as the intrinsic luminosity emitted by a star or other astronomical objects.
Thus, apparent magnitude is correct.
Can being obese kill?
If a strong force acts on the metal towers of the suspension bridge, the towers will not break into pieces, like glass would, but will bend instead. Which property of metals explains this phenomenon?
The periodic chart has many different types of elements. Some elements are metals, some are nonmetals, and yet others are metalloids. Therefore, ductility is the property of metals that explains the given phenomenon.
What is metal?Metals are hard, conduct electricity, are ductile, lustrous, and malleable materials. Since metals have free electrons that's why they can conduct electricity. Since atoms in metals are very closely packed in a definite crystal solid. It is not brittle that is it can not be broken down easily.
If a strong force acts on the metal towers of the suspension bridge, the towers will not break into pieces, like glass would, but will bend instead. Ductility is the property of metals that explains the given phenomenon.
Therefore, ductility is the property of metals that explains the given phenomenon.
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What behavior of light PROVES that it is a wave? Hint: will this ONLY happen because light is a wave, or could it also be true of fast moving particles? *
Reflection of light
Absorption of light
Light changes speed in glass and water.
Interference between two or more light waves
Answer:
Light changes speed in a glass of water.
Explanation: