Answer:
calcule o PH e POH de 2,625g de HCLO em 2000cm3 (cl=35,5)
Explanation:
The word chemical equation which hydrogen reacting with oxygen to form water is hydrogen + oxygen → water.
What is chemical equation?Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.
A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .
The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.
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In a neutralization reaction, an aqueous solution of an arrhenius acid reacts with an aqueous solution of an arrhenius base to produce:.
An aqueous solution of an arrhenius acid reacts with an aqueous solution of an arrhenius base to produce water and salt.
What is a Salt?This is a compound which is formed as a result of a neutralization reaction between acid and base.
Arrhenius acid reacts with an aqueous solution of an arrhenius base to produce water and salt due to increased concentration of H+ and OH- respectively.
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If 0.094 moles of magnesium react with excess oxygen, how many moles of magnesium oxide would be formed?
The equation for this reaction is
[tex]\text{Mg}+\text{O} \longrightarrow \text{MgO}[/tex]
This means that for every mole of magnesium consumed, 1 mole of magnesium oxide is produced.
So, the answer is 0.094 moles.
Why do elements of same gropu show similar chemical properties?
What is the percent yield if the quantity of reactants is sufficient to produce 0.86g of
NaCl but only 0.71g is obtained?
Taking into account definition of percent yield, the percent yield for the reaction is 82.56%.
Definition of percent yield
The percent yield is the ratio of the actual return to the theoretical return expressed as a percentage.
The percent yield is calculated as the experimental yield divided by the theoretical yield multiplied by 100%:
[tex]percent yield= \frac{actual yield}{theorical yield}x100[/tex]
where the theoretical yield is the amount of product acquired through the complete conversion of all reagents in the final product, that is, it is the maximum amount of product that could be formed from the given amounts of reagents.
Percent yield for the reaction in this case
In this case, you know:
actual yield= 0.71 gramstheorical yield= 0.86 gramsReplacing in the definition of percent yields:
[tex]percent yield= \frac{0.71 g}{0.86 g}x100[/tex]
Solving:
percent yield= 82.56%
Finally, the percent yield for the reaction is 82.56%.
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How many moles of NH3 are produced in the reaction of 3.3 moles of N2?
N2 + 3H2 = 2NH3
Answer:
6.6 moles of NH3
Explanation:
3.3 mol N2 * (2 mol NH3/ 1 mol N2) = 6.6 mol NH3
Below is the thermochemical equation for the combustion of octane.
SC8H18(l) + 25O2(g) ⇒ 16CO2 (g) + 18H2O(l), ΔH= -10,941kj
How much heat is released during the combustion of 4 moles of octane (C8H18)
Question 5 options:
-21,882 kJ
-175,056 kJ
-2,735 kJ
-10,941 kJ
Impossible to answer this question with the information provided
-5,470.5 kJ
5mol produces -10.941KJ
4 mol let produces x KJ
Solve through proportion
5/-10.941=4/x5x=-43.764x=-43.764/5x=8.756 KJ5moles of octane produces -10941KJ
1mol of octane produces 2188KJ
4mol of octane produces
2188(4)8756KJWhat is transferred between a conjugate acid-base pair.
Answer:
Protons (Hydrogen Ions) transfer between conjugate acid-base pair.
Explanation:
An atom's electron configuration ends with 3p^3. if another atom has nine more electrons, what would be the continuation of the electron configuration?
The continuation of the electronic configuration would be [tex]3p^6, 4s^6, 3d^4.[/tex]
What is an electron configuration?Electronic configuration, also called electronic structure, is the arrangement of electrons in energy levels around an atomic nucleus.
The initial p-orbital (the [tex]3p^3[/tex]) is incompletely filled. Thus, the first thing would be to fill it completely ([tex]3p^6[/tex]) so as to obey the orbital-filling rule. This leaves 6 more electrons.
After 3p orbital, the next orbitals are 4s, 3d, 4p, 5s, etc.
The 4s orbital will take a maximum of 2 electrons, leaving 4 more electrons.
Next would be the 3d orbital which can take a maximum of 8 electrons, but only 4 electrons are left.
Thus, the electronic configuration would be [tex]3p^6, 4s^6, 3d^4.[/tex]and elements is Vanadium (V).
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Ahmed doesn't believe in electromagnetism so he makes an electromagnet to prove his teacher wrong. To his surprise, the electromagnet works and he's able to pick up metal objects with it. Even still, he's not satisfied with his electromagnet because it's very weak. What can he do to make it stronger?
Answers: use a weaker battery
1. use a stronger battery
2. use a plastic nail
3. glue the wire to the nail
4. wrap the wire around the nail fewer times
Answer:
1) Use a stronger battery
Explanation:
I'm going to quote Northeastern University (I could try to type out an explanation but this will probably be more concise)
"Electromagnets are made of coils of wire with electricity passing through them. Moving charges create magnetic fields, so when the coils of wire in an electromagnet have an electric current passing through them, the coils behave like a magnet."
4) So, if the coils are creating a moving charge, and there are more coils, each coil will be "setting up" its own magnetic field. This means that less coils will make the electromagnet weaker
2) Because it is an electromagnet, a plastic nail is not going to produce the same effect. An electromagnet is picking up metal, and it is not picking up plastic. This is because plastic (a material with low permeability) does not have a magnetic field that is able to interact with a magnet.
[Permeability is a measure of how easily magnetic lines of force can pass through a material.]
3) There's not really a point that I can imagine of gluing the wire to the nail. Glue would put more distance between the nail and the magnet than nothing being there at all.
1) More voltage in a battery produces a larger current in the wire. This means that the strength of an electromagnet is affected by the voltage/strength of the battery. So, a stronger battery would make the electromagnet stronger, and a weaker battery would make the electromagnet weaker.
The electromagnet works, and he's able to pick up metal objects with it, he does to make it stronger to use a stronger battery. Therefore, option 1 is correct.
What is electromagnet ?An electromagnet is a type of magnet where an electric current creates the magnetic field. The wire that makes up an electromagnet is typically twisted into a coil. A magnetic field is produced by a current flowing through the wire and is concentrated in the hole in the center of the coil.
Electrical devices including motors, generators, speakers, computers, and MRI machines cannot be built without electromagnets. They are well known for their ability to lift and move heavy magnetic objects, such as scrap iron.
Many electromagnets have an advantage over permanent magnets because they can be easily turned on and off, and increasing or decreasing the amount of electricity flowing around the core can control their strength.
Thus, option 1 is correct.
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If you have 3 moles of gas at a pressure of 2.5 atmospheres and a volume of 8 liters, what is the temperature? Pay attention to the unit of pressure used.
A.) 81.27 K
B.) 0.81 K
C.) 57.86 K
D.) 25 K
The temperature of the gas would be 81.2 K
Ideal gas equationThe ideal gas equation is given by:
PV = nRT, where P, V, n, R, and T equals pressure, volume, number of moles, constant, and temperature respectively.
In this case, V = 8L, n = 3 moles, R = 8.317, and P = 2.5 atm or 253.3125 kpa
T = PV/nR = 253.3125 x 8/3 x 8.317 = 2026.5/24.951 = 81.2 K
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9. Which practice has been able to save some organisms from extinction?
O cross breeding
O genetic modification
O captive breeding
Orebuilding habitats
The practice that has been able to save some organisms from extinction is cross breeding.
What is cross breeding?Cross breeding is the process of producing separate strains of the same species in order to create new traits.
Living organisms are bound to go extinct when faced by certain unfavorable conditions that cannot be adapted to.
However, the production of resistant strains of the same species of an organism via cross breeding can help prevent them from going extinct.
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Answer:
c
Explanation:
For which process would the pictured cell be used?
Producing electricity
Splitting a compound into its elements
Purifying a metal
Coating a material with metal
Answer:
Coating a material with metal
(SInce the glasses will be coated with gold.)
At a consent tempture the pressure on a 2.5 l ballon is increased from 2.4 atm to 5.8 atm. what is the new volume?
Answer:
1.034 L
Explanation:
P1 V1 = P2 V2
P1 V1 / P2 = V2
2.4 (2.5) / 5.8 = V2 = 1.034 L
In an electroplating apparatus, where does the reduction reaction occur?
On the surface of the anode
On the surface of the battery
In the solution
On the surface of the cathode
Answer:
on the surface of the cathode
Please help/show work!
how many grams of n2 has gave a volume of 11.2 liters at stp? ideal gas law
Answer:
7.00335g
Explanation:
[tex]n=\frac{V}{V_m} \\n = \frac{11.2}{22.4} \\n= 0.5 mol[/tex]
[tex]n=\frac{m}{M} \\m=nM\\m=(0.5)(14.0067)\\m=7.00335g[/tex]
TRUE OR FALSE
Q1.) Is the distances of the gas molecules are far greater than it's molecule dimensions.?
Q2.) The movement of any gas particle/molecules is directly affected by temperature.?
｡ﾟ(TヮT)ﾟ｡ H-Help me with this pls...,,
Answer:
Q1. False
Q2. True
Explanation:
gas molecules are not that at far than dimensions molecules
Which of the following numbers is equal to the value shown in scientific
notation below?
1.9 x 10-2
A.0.0019
B.0.019
C.0.19
D. 0.00019
Explanation:
the answer for the above
is b)0.019
Why is it important for scientists to use common units such as the metric system?
A. so they can effectively communicate their findings
B. so they can double check their data
C. so they can form similar hypotheses
D. so they can conduct controlled experiments
Answer:
The correct answer is A, or "so they can effectively communicate their findings.
Explanation:
The metric system is the international system of weights and measures, which is used universally in the scientific community. Scientists benefit from the metric system so that they can communicate theories, ideas and most importantly data in a way everyone understands. It is virtually impossible to comprehend any modern, data-rich research in the natural or physical sciences without referring to the metric system and being able to contextualize the numbers and units it includes.
Please brainliest answer
I appreciate it :)
Which type of scientist would most likely study how electricity could be
produced more efficiently?
Electrical engineers are the scientists that study the production of electricity more efficient.
Which type of scientist would study how electricity could be produced more efficiently?
Electrical engineers are the type of scientist that would most likely study how electricity could be produced more efficiently because they produced new technologies which are cost efficient as well as produce high amount of electricity.
So we can conclude that electrical engineers are the scientists that study the production of electricity more efficient.
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What is the name of this structural formula?
Answer:
2-methylbutane
Explanation:
First, you want to identify the largest number of sequential carbons. In this case, the parent chain is made up of 4 carbons. This makes the base name, butane.
Next, you want to identify any branches. There is a branch made up of 1 carbon, and these are referred to as a methyl group. The lowest possible carbon on the parent chain this branch is attached to is the second carbon.
When you put these factors together, you are left with the name: 2-methylbutane.
Can someone please help? This is super hard!!
Answer:
what is super hard?
Explanation:
what?
solve for x
[tex] \bold{x^{2} + 6x + 5 = 0}[/tex]
ty! ~
Answer:
x²+6x+5=0
On comparing with the equation
ax² + bx + c = 0
a=1, b = 6 and c = 5
Now
b²– 4ac = 6² – 4 x 1 x 5 = 36 - 20 = 16
[tex]x = \frac{ - b \:± \: \sqrt{b {}^{2} - 4ac } }{2a} \\ \\ x = \frac{ - 6\:± \: \sqrt{16 } }{2 \times 1} \\ \\ x = \frac{ - 6± {4} }{2} \\ \\ x = \frac{ - 6 + {4} }{2} \: \: or \: \: x = \frac{ - 6 - {4} }{2} \\ \\ \implies \: x = \frac{ \cancel-2 }{ \cancel2}^{-1 }\: \: or \: \: x = \frac{ \cancel-10 }{ \cancel2}^{-5}\\ \\ \implies \: { \blue{\fbox{ \: x = - 1 \: \: \: or \: \: \:x = - 5}}}[/tex]
[tex] {x}^{2} + 6x + 5 = 0 \\ \\ {x}^{2} + 5x + x + 5 = 0 \\ \\ x(x + 5) + 1(x + 5) = 0 \\ \\ (x + 1)(x + 5) = 0.[/tex]
[tex]x = - 1 \\ x = - 5.[/tex]
An atom has eight protons and nine neutrons. draw the atomic structure of the atom
An atom has eight protons and nine neutrons. The atomic structure of the atom is attached below in image.
What is an atomic structure ?The term "atomic structure" describes the structure of an atom, which has a nucleus that contains both protons and neutrons . The centre of the nucleus is circled by the negatively charged electrons.
The smallest piece of ordinary matter within an element is called an atom. Protons, neutrons, and electrons are the three subatomic particle types that make up an atom.
An isotope's number is equal to the sum of its protons plus neutrons since their masses are almost identical. Oxygen 16 therefore has 8 protons and 8 neutrons, followed by oxygen 17 with 8 protons and 9 neutrons, and oxygen 18 with 8 protons and 10 neutrons.
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What change in volume results if 50 mL of gas is cooled from 30 C to 4 C
increases by 4.29 mL
decreases by 4.29 mL
decreases by 45.7
increases by 6.66 mL
The relation between the volume of the gas and the temperature is established by Charles's law. With a decrease in the temperature, the volume decreases by 45.7 mL. Thus, option c is correct.
What is Charle's law?Charle's law states the direct relation present between the temperature and the volume of the gas. The law is given as:
V₁ ÷ T₁ = V₂ ÷ T₂
Given,
V₁ = 50 mL
T₁ = 303.15 K
T₂ = 277.15 K
Substituting the value the final volume is calculated as:
50 ÷ 303.15 = V₂ ÷ 277.15
V₂ = (50 × 277.15) ÷ 303.15
= 45.71 mL
Therefore, option c. 45.7 mL is the final volume.
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Fe(no3)3 + na0h > fe(oh)3 + nano3 is balanced or unbalanced?
Answer:
Unbalanced
Explanation:
[tex]\text{Fe}(\text{NO}_3)}_3+ \text{NaOH} \rightarrow \text{Fe(OH)}_3 + \text{NaNO}_3\\\\\text{Balanced reaction:}\\\\\text{Fe}(\text{NO}_3)}_3+ 3\text{NaOH} \rightarrow \text{Fe(OH)}_3 + 3\text{NaNO}_3[/tex]
Which of the following is true for the equilibrium constant of a reaction? (5 pc
OIts value remains constant at different temperatures.
It is a ratio of coefficients of reactants to products.
It is represented by the symbol K.
Its value is always less than 1.
The equilibrium constant of the reaction is represented by the symbol K. Thus, option C is the correct and accurate statement about the equilibrium constant.
What is the equilibrium constant?The equilibrium constant is a representation of the concentration of the products and the reactants of the reaction that is raised to the powers through their stoichiometry coefficient.
Its value varies and changes at different temperatures and is not always less than 1. The equilibrium constant is the ratio of the coefficient of the products to reactants.
Therefore, option C. equilibrium constant is represented by K is true.
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Indicate how the gas molecules move between the system and the surroundings based on changes in pressure, temperature, and volume and the number of moles.
The gas molecules move between the system and the surroundings follow PV=nRT.
What are molecules?The smallest particle of a substance has all of the physical and chemical properties of that substance.
An increase in pressure pushes the molecules closer together, reducing the volume. If the pressure is decreased, the gases are free to move about in a larger volume.
In the kinetic theory of gasses, increasing the temperature of a gas increases in average kinetic energy of the molecules, causing increased motion.
The reduction in the volume of the gas means that the molecules are striking the walls more often increasing the pressure, and conversely if the volume increases the distance the molecules must travel to strike the walls increases and they hit the walls less often thus decreasing the pressure.
At constant temperature and pressure the volume of a gas is directly proportional to the number of moles of gas. At constant temperature and volume the pressure of a gas is directly proportional to the number of moles of gas.
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question -What happens to the energy of a wave if the amplitude of the wave is doubled?
The energy carried by the waves depends on the amplitude of the wave. If the amplitude is doubled then the energy gets increased by four times.
What is amplitude?The amplitude of a wave is the distance from the center line to the trough or the crest of the wave. The energy of the wave is directly proportional to the square of the amplitude.
E ∝ A²
So if the amplitude is doubled then E = 4. Hence, the energy gets increased quadruples times. The energy is related to the frequency and the wavelength of the wave that travels.
Therefore, the energy gets increased by four times if the amplitude is doubled.
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What is a real-life example of equilibrium and what would happen if there was a shift in the system of that example?
Answer:
Refrigerator
Explanation:
Think about it. Equilibrium is between 2 "places", and if you didn't open the fridge, there would be a buildup of cold air.
Because of that buildup, it would keep getting colder until it isn't possible to get cold anymore. That is equilibrium.
However, if you were to open the door for a very, very long time, you would lower the temp. inside the fridge, therefore causing for the room you are in to be slightly colder, and the fridge to decrease in cold. The fridge will still be slightly cold, but it won't be lukewarm if you leave it for 2 hours. (Unless it's broken)
That is equilibrium :)
I
10. how many grams of koh are there in 200 grams of 10% by mass koh solution?
Answer: 20 grams
Explanation:
[tex]10=\frac{\text{grams of KOH}}{200}\\\text{grams of KOH}=20[/tex]