The net ionic equation is OH⁻(aq) + H⁺(aq) H₂O(l) and k ~1.
What is an ionic equation?A molecular equation is an equation in which the formula of a compound is written as if all substances exist as molecules. An ionic equation is an equation in which dissolved ionic compounds are represented as free ions.
Consider the molecular equation that occurs when an aqueous solution of lithium hydroxide and hydrobromic acid undergo a neutralization reaction.
LiOH(aq) + HBr(aq) ⇒ LiBr(aq) + H₂O(l)
The complete ionic equation includes all ions and species.
Li⁺(aq) + OH⁻(aq) + H⁺(aq) + Br⁻(aq) ⇒ Li⁺(aq) + Br⁻(aq) + H2O(l)
Only ions in the net ion equation It is included. Participate in reactions and molecular species.
OH⁻(aq) + H⁺(aq) H₂O(l)
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Balance the neutralization reaction of phophoric acid with magneium hydroxide. State of matter are not needed
Balance the neutralization reaction of phophoric acid with magneium hydroxide is 2 H₃PO₄ + 3 Mg(OH)2 ⇒ Mg₃(PO₄)₂ + 6H₂O
This reaction is known as a neutralization reaction because the acid and base react to form a salt and water by-products. Phosphoric acid reacts with magnesium hydroxide to produce Magnesium phosphate and water.
A chemical reaction is balanced when there are equal amounts of each element on both sides of the equation.
Therefore, balance the neutralization reaction of phosphoric acid with magnesium hydroxide is 2 H₃PO₄ + 3 Mg(OH)2 ⇒ Mg₃(PO₄)₂ + 6H₂O
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What is the pressure (in pascals) if the level in the arm open to the atmosphere is 55.3 cm higher than the level in the arm connected to the gas sample and the atmospheric pressure reading is 761.7 mm Hg ?
Answer: I love rats u love rats? HB dogs ? or do you like cats I have a Persian cat and 1 ginger cat his name is ginger Vitus but you can call him ginger or Ginga or bitus and I feed them tuna and cat food do you
An element with the smallest anionic (negative-ionic) radius would be found on the periodic table in.
An element with the smallest anionic (negative-ionic) radius would be found on the periodic table in group 17 , period 2.
The elements in the periodic table are arranged in the order of the increasing atomic number . the elements are arranged in the groups and the periods in the periodic table. the atomic radius increases as we move from top to bottom in the group and the atomic size decreases as we move from left to right in period in the periodic table.
the ionic radius increases as we move top to bottom in the periodic table and as we move in the periodic table the ionic radius decreases. so, the element with smallest anionic radius is in group 17 and period 2.
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This body part in squids allows them to propel themselves rapidly by sucking in through the mantle and out through the ___________.
This body part in squid allows them to propel themselves rapidly by sucking in through the mantle and out through the siphon.
The siphon is a large tube at the bottom of the giant squid's body and allows it to move. The giant squid draws air into a siphon and pushes the air out to propel itself forward.
Squids have a tubular bodies and small rod-like internal structures called pens, which help support the squid's body. The mantles help protect the cavity of the squid, as well as help it move, as they suck water in and then push it out.
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A 100. 0 ml sample of 0. 10 m nh3 is titrated with 0. 10 m hno3. Determine the ph of the solution after the addition of 100. 0 ml of hno3. The kb of nh3 is 1. 8 × 10-5.
The ph of the solution after the addition of 100. 0 ml of HNO3 is 5.6. In a 100. 0 ml sample of 0. 10 m NH3 is titrated with 0. 10 m HNO3.
Define anion and cation.Ions with a positive charge are called cations. Ions with negative charge are called anions. Ionic molecules or atoms are charged. A balanced atom will become a positively charged cation if it loses one or more electrons. An anion is a negatively charged atom that develops when a balanced atom acquires one or more electrons.
Reaction: HNO₃(aq) + NH₃(aq) → NH₄NO₃(aq) +H₂O(l)
NH₄⁺ (aq) + NO₃⁻(aq)
NH₄⁺(aq) + H₂O (aq) ⇆ H₃O⁺(aq) + NH₃(aq)
Mol NH₃ = 0.10 mol/L × 100 mL × 1 L/1000 mL = 0.01 mol
Mol HNO₃ = 0.10 mol/L × 100 mL × 1 L/1000mL = 0.01 mol
Mol NH₄NO₃ produced = 0.01 mol NH₄NO₃
Mol HNO₃ left = 0.01 - 0.01 = 0 mol
Hydrolyzing NH₄⁺ and applying ICE approach
NH₄⁺ --> H⁺ + NO₃⁻
I 0.01 0 0
C -x +x +x
E 0.01-x x x
Kh = Kw/Kb = [H⁺][NO₃⁻]/[NH₄⁺]
10⁻¹⁴/1.8×10⁻⁵ = [x][x]/[0.01-x]
Solving for x,
x = [H⁺] = 2.357×10⁻⁶ mol
The formula for pH is
pH = -log [H⁺]
Aside from 2.357×10⁻⁶ mol, let's add the H⁺ from the remaining HNO₃ which is 0.
Therefore,
pH = -log[2.357×10⁻⁶ mol + 0 mol]
pH = 5.6
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draw a lewis structure for clo2-. do not include the charge in your drawing. do not draw double bonds to oxygen unless they are needed in order for the central atom to obey the octet rule.
The lewis structure for Chlorine dioxide is present in the attachment.
Lewis structure: The valence shell electrons in a molecule are depicted in an extremely simplified manner by a Lewis Structure. It is used to demonstrate how the electrons in a molecule are positioned around particular atoms. When two atoms are bonded together, electrons are depicted as "dots" or as a line.
Octet rule: The octet rule describes an atom's propensity to favor eight electrons in its valence shell. Atoms with fewer than eight electrons are more likely to interact with one another and create more stable molecules.
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words, state the relationship between resistance and current in a circuit.
Relationship between resistance and current in a circuit is current is inversely proportional to the resistance
The relationship between current and voltage, resistance is expressed by ohm's law and this states that the current flowing in a circuit is directly proportional to the applied voltage and inversely proportional to the resistance of the circuit and provided the temprature remain constant and hence the relationship between current and resistance could be written as I = VR for constant value of voltage and the current is inversely proportional to the resistance
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ASAP! PLEASE!
For the reaction below calculate how many moles of HCI are produced along with 2.9 moles of H3P04.
PCI5 + 4 H20 ---> H3P04 + 5 HCI
The number of moles of HCl produced along with the 2.9 moles of H₃PO₄ is 14.5 moles
Calculating number of moles of HCl produced in a reactionFrom the question, we are to determine the number of moles of HCl that are produced along with 2.9 moles of H₃PO₄
The given balanced chemical equation of the reaction is
PCI₅ + 4H₂O ---> H₃PO₄ + 5HCI
From the balanced chemical equation,
1 mole of PCI₅ reacts with 4 moles of H₂O to produce 1 mole of H₃PO₄ and 5 moles of HCI
Now,
If 2.9 moles of H₃PO₄ are produced from the reaction,
Then,
5 × 2.9 moles of HCl will be produced along with the H₃PO₄
5 × 2.9 = 14.5 moles
Hence, the number of moles of HCl produced is 14.5 moles
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Write a balanced equation for the combustion of isooctane to yield co2 and h2o.
The balanced equation for the combustion of isooctane to yield CO₂ and H₂O is
2CH₈H₁₈ + 25O₂ → 16CO₂ + 18H₂O
Combustion in a reaction is what?When a substance combines with oxygen gas, it releases energy in the form of heat and light, which is known as a combustion reaction.
When a substance burns in the presence of oxygen, heat and light are produced as a result. This process is referred to as combustion. You may have heard that while some compounds are non-combustible, others are combustible. Simply said, combustible materials go through this procedure.
A lit match is a common illustration of a combustion reaction. A flame is produced when a match is struck because friction heats the head to a temperature where the chemicals react and produce more heat than can be released into the atmosphere.
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what is the concentration of cl-1 ions when 10.0g of calcium chloride (cacl2) is dissolved in a solution with a total volume of 250.0ml?
0.72M is the concentration of cl-1 ions when 10.0g of calcium chloride (Cacl2) is dissolved in a solution with a total volume of 250.0ml.
What concept is utilized here?The key here is to realize that a solution of calcium chloride, CaCl2, will always contain twice as many chloride anions, Cl−, than calcium cations, Ca2+.
This means that one mole of calcium chloride, which contains one mole of formula units of calcium chloride, will have one mole of calcium cations, 1× Ca2+ two moles of chloride anions, 2×Cl−.
The sample given to you contains
10.0g ×mole CaCl2 /110.98g
= 0.0901 moles CaCl2
The solution will thus contain
{0.0901moles Ca2+, 2× 0.0901 moles Cl−}
The two ions' respective concentrations will be
[Ca2+]= Ca2+ 0.0901 moles/ 250× 10^-3
= 0.36M
[Cl−]= Cl−2× 0.0901moles/ 250× 10^-3= 2× 0.36
M= 0.72M
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I really hope i don't mess this up again. sorry
In the scientific notation, the number that we obtain is 4.6 * 10^-10.
What is the result in the scientific notation?We know that in science we often have to deal with very large figure and these figures that we deal with could be quite cumbersome to handle. As such, it is important that we are able to devise a system that can help us to be able to write these values in a way that is simple and this is the origin of the use of the scientific notation.
The scientific notation can help us to be able to shorten the bulk of the figures tat we need to write. In this case we have the figures; 2.3 * 10^-4 * 2.0 * 10^-6 = 4.6 * 10^-10
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Balance the equation:
CO+Fe₂O3 Fe + CO₂
PLEASE HELP
Answer:
3CO + Fe₂O₃ = 2Fe + 3CO₂
What is the average height of a 14 year old male
Answer:
64.6 in (164 cm)
Explanation:
Answer:5’7
Explanation:
what is the approximate population of the united states today? a. 350 million b. 375 million c. 249 million d. 325 million
325 million is the approximate population of the united states today.
Describe some amazing facts about united state?Official Name: United States of America
Population: 324, 057, 300
Form of Government: Constitution-based federal republic
Capital: Washington, D.C.
Area: 9, 826, 630 square km
Major Mountain Ranges: Rocky Mountains, Appalachian Mountains
Major Rivers: Mississippi, Missouri, Colorado
Languages: English, Spanish
Money: U.S. dollar
Native Americans inhabited the enormous area that would become the United States of America for many millennia. Some of these native tribes roamed the vast continent at will, while others established sizable permanent settlements in certain locations.
Each of these tribes created their own cultures, festivals, and rituals. As a way to honor their culture and identity, many aboriginal people still precise these rituals today.
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3) the following reaction is an example of a reaction. * al(s) h2so4(aq)->al2(so4)3(aq) ?h2
Redox (Oxidation-Reduction) (Oxidation-Reduction) Al2(SO4)3 + H2 from the reaction Al + H2SO4 may be a redox reaction.
Short answer: a chemical reaction?A chemical reaction is a process in which one or more substances, also known as reactants, are changed into one or more distinct compounds, known as products. Either chemical elements or chemical compounds make up substances.A chemical reaction is a process that results in the chemical conversion of one group of chemical components into another.Redox (Oxidation-Reduction) (Oxidation-Reduction) Al + H2SO4 = Al2(SO4)3 + H2 could be a redox process. A chemical reaction called an oxidation-reduction (redox) reaction includes the exchange of electrons between two substances.To learn more about Chemical reaction refer to:
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A student dissolves 20 g of potassium chloride in 100 cm3 of water in a beaker. What is the concentration of the solution in g/dm3?.
At 50 degrees Celsius, potassium chloride is soluble in 43.0 grammes per 100 grammes of water.
At 20 C, how much KCl can dissolve in 100 grammes of water?The solution to the issue gives you the solubility of potassium chloride, KCl, in water at 20°C, which is stated to be 34 g/100 g H2O. For every 100 g of water in a saturated potassium chloride solution at 20 °C, 34 g of dissolved salt will be present.
The solution to the issue gives you the solubility of potassium chloride, KCl, in water at 20°C, which is stated to be 34 g/100 g H2O.
The amount of a material that can dissolve completely in a solvent at a specific temperature is known as its solubility. A saturated solution is one such example.
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Answer:
200g/dm3
Explanation:
100cm3 needs to be converted into dm3
cm3 ⇒ dm3= ÷1000
[tex]\frac{100}{1000\\}[/tex]= 0.1
To find the concentration we need to follow the formula:
C=[tex]\frac{m}{v\\}[/tex]
C=[tex]\frac{200}{0.1}[/tex]
C= 200g/dm3
g one of the hazards of nuclear explosions is the generation of 90 sr and its subsequent incorporation in place of calcium in bones. this nuclide emits b particles of energy 0.55 mev and has a half-life of 28.1 a (1 a is the si unit 1 annum, for 1 year). suppose 1.00 mg was absorbed by a newborn child. how much will remain after (a) 19 a and (b) 75 a if none is lost metabolically?
The amount of Sr90 remained after a) 19 a is 0.625 x 10^-6 g and after 75 a is 0.157 x 10^-6 g. This emission is known as radioactive decay.
What is radioactive decay?
Radioactive decay is a process in which any unstable nucleus loses its energy in the form of radiation. Different types of decays include beta decay, alpha decay and gamma decay in which there is a loss of one or more molecule in the form of radiation.
In radioactive decay, half life of any atomic nuclei is the time in which the nucleus becomes half of its initial mass.
λ = 0.693 / t1/2 = 0.693 / 28.1 per year.
t = [2.303 /λ] * log [a / a-x]
a) 19 = [2.303/ 0.693] * 28.1 * log [10^-6 / a-x]
0.203 = log [10^-6 / a-x]
a - x = 0.625 x 10^-6 g
b) 75 = [2.303/ 0.693] * 28.1 * log [10^-6 / a-x]
0.803 = log [10^-6 / a-x]
a - x = 0.157 x 10^-6 g
Therefore, the amount of Sr90 remained after a) 19 a is 0.625 x 10^-6 g and after 75 a is 0.157 x 10^-6 g. This process is done by beta decay.
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The significance of the Ronald Cotton case:
a. it shows that a serial killer can be indicted 20 years after the crimes
b. it demonstrates the fallibility of eyewitness accounts
c. that a person can be convicted of murder, even without a body
d. that a person can be convicted without individual evidence
The significance of the Ronald Cotton case, that a person can be convicted without individual evidence. Therefore, option D is correct.
What is evidence ?Evidence is something or information used to increase or decrease the likelihood that a fact exists. Evidence can be testimony, written materials, visual or audio recordings, DNA samples, or other physical artifacts.
In essence, evidence is utilized to support a claim made by people or organizations who think something is real or a fact. Evidence may also be used to debunk or dispute a fact or claim that others don't agree with or believe to be incorrect.
Thus, option D is correct.
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Cobalt-60 is a radioisotope that decays by first order kinetics with a half life of 5. 26 years. When used in radiotherapy, a cobalt-60 unit is replaced when the concentration of co decreases to 75% of its initial value. When does this occur?.
Cobalt-60 is a radioisotope that decays by first order kinetics with a half life of 5. 26 years. When used in radiotherapy, a cobalt-60 unit is replaced when the concentration of co decreases to 75% of its initial value it occurs in 2.18 years.
Given that :
t1/2 = 5.26 years
k t1/2 = 0.693
k = 0.693 / 5.26
k = 0.132 yr^-1
ln ([A]t / [A]o) = - kt
[ Co ] = 0.75 [Co]
ln ( 0.75 [Co] / [Co]o) = - (0.132 yr^-1) t
ln 0.75 = - (0.132 yr^-1) t
-0.288 = - (0.132 yr^-1) t
t = - 0.288 / - (0.132 yr^-1)
t = 2.18 yr
Thus, Cobalt-60 is a radioisotope that decays by first order kinetics with a half life of 5. 26 years. When used in radiotherapy, a cobalt-60 unit is replaced when the concentration of co decreases to 75% of its initial value it occurs in 2.18 years.
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When calcium oxalate dissolves in water, what will happen to the temperature of the water?.
The entire reaction equation for the thermal decomposition of (CaC2)[tex]O^{4}[/tex]. [tex]H_{2}O[/tex] is shown below. to make calcium oxalate that is anhydrous.
Water is lost by crystallisation in step 1. Step 2 involves converting calcium oxalate thermally to calcium carbonate while releasing carbon monoxide.
They can be categorised as calcium oxalate if they are insoluble in caustic alkali and acetic acid, soluble in hydrochloric and sulfuric acid without effervescence, and show a progressive separation of needle-like calcium sulphate crystal when mixed in a 50% sulfuric acid solution.
It burns in pure oxygen or air to form the oxide and reacts quickly with warm water to create calcium hydroxide and hydrogen gas (and more slowly with cold water). Calcium reacts when heated with boron, carbon, sulphur, phosphorus, halogens, and hydrogen.
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A 7.850 g sample of a solid compound is analyzed and it is determined that its composition
is 2.087 g of potassium, 2.775 g of chromium, and 2.988 g of oxygen. Calculate the empirical formula of
this compound.
The empirical formula of the sample is KCrO₄
Given that :
Potassium , K = 2.087 g
molar mass of potassium = 36 g/mol
Chromium , Cr = 2.775 g
molar mass of chromium = 52 g/mol
Oxygen , O = 2.988 g
molar mass of oxygen = 16 g/mol
the number of moles of potassium = mass / molar mass
= 2.087 / 36
= 0.05 mol
the number of mole of chromium = mass / molar mass
= 2.775 / 52
= 0.05 mol
the number of moles of oxygen = mass / molar mass
= 2.988 / 16
= 0.18 mol
now diving by the smallest number, we get
moles of K = 1
moles of Ce = 1
moles of O = 4
the empirical formula for the sample is KCrO₄
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What are the oxidation numbers of the atoms in this reaction? check all that apply. mg(s) 2hcl(aq) → mgcl2(aq) h2(g) 0 for mg in mg and mgcl2 0 for mg(s) and h in h2 1 for h in hcl -1 for cl in hcl 2 for mg in mgcl2
The correct oxidation numbers are as follows;
The oxidation number for Mg in Mg(s) is 0The oxidation number of H in H₂ is 0The oxidation number for Mg in MgCl₂ is +2The oxidation number of H in HCl is +1The oxidation number of Cl in HCl is -1What are oxidation numbers?Oxidation states or oxidation numbers are the hypothetical charges of atoms when all bonds to various atoms are fully ionic. Represents the degree of oxidation of atoms in a compound. Conceptually, the oxidation state can be either positive, negative, or zero.
The oxidation number of free neutral elements is zero.The oxidation number of a monatomic ion is equal to the charge of the ion. The oxidation number of Group I A elements is always +1. The oxidation number of Group II A elements is always +2.Oxygen usually has an oxidation number of -2.The oxidation number of an atom indicates how many electrons the atom gained or lost when the substance was formed.
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If a chemist wants to make 50g of HClO3, what is the minimum number of grams of ClO2 that she must use?
the reaction is 6ClO2+3H2O=5HClO3+HCl
Taking into account the reaction stoichiometry, the minimum number of grams of ClO₂ that a chemistry must use to make 50 g of HClO₃ is 47.92 grams.
Reaction stoichiometryIn first place, the balanced reaction is:
6 ClO₂ + 3 H₂O → 5 HClO₃ + HCl
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
ClO₂: 6 molesH₂O: 3 molesHClO₃: 5 molesHCl: 1 moleThe molar mass of the compounds is:
ClO₂: 67.45 g/moleH₂O: 18 g/moleHClO₃: 84.45 g/moleHCl: 36.45 g/moleThen, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:
ClO₂: 6 moles ×67.45 g/mole= 404.7 gramsH₂O: 3 moles ×18 g/mole= 54 gramsHClO₃: 5 moles ×84.45 g/mole= 422.25 gramsHCl: 1 mole ×36.45 g/mole= 36.45 gramsMass of ClO₂ requiredThe following rule of three can be applied: If by reaction stoichiometry 422.25 grams of HClO₃ are formed from 404.7 grams of ClO₂, 50 grams of HClO₃ are formed from how much mass of ClO₂?
mass of ClO₂= (50 grams of HClO₃× 404.7 grams of ClO₂)÷ 422.25 grams of HClO₃
mass of ClO₂= 47.92 grams
Finally, 47.92 grams of ClO₂ is required.
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What three elements do all macromolecules share? explain how the chemical properties of lipids, nucleic acids, and proteins differ from carbohydrates.
Both the hydrogen and carbon atoms are present in every macromolecule.
How do macromolecules work?The molecules made up of smaller units are referred to as macromolecules. They are referred to as monomers. The macromolecules that are relevant to this discussion are those that may be present in the human body.
As we can see, biological macromolecules are frequently quite big. This is due to the fact that macromolecules often consist of a large number of units linked together. To create the macromolecules of proteins, lipids, carbohydrates, and nucleic acids, thousands of monomer molecules are bonded together.
The carbon atom and the hydrogen atom are present in every macromolecule. These are present in every macromolecule. The carbonyl bond is present because the carbs are lowering sugars. Lipids, nucleic acids, proteins, and amino acids do not undergo carbonyl reduction processes because they do not contain a carbonyl group.
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The electoral college system creates a population inequity in presidential elections because.
The electoral college system creates a population inequity in presidential elections because under the constitution large stated are untitled to fewer electors president then smaller states
The electoral college is the process we use to elect the US president and established in the US constitution and it purpose is to spread the power elect the president across all 50 stated and it was designated to ensure that the more populous state didn't overpower the smaller states when choosing the nation leader and total 538 elector form the electoral college and each elector cast one vote following the general election and the candidate who get 270 votes more win and the newly elected president and vice president are then inaugurated
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calculate the ratio of the energies of the anti-periplanar conformations leading to cis and trans alkenes (1 and 2)
The anti-periplanar conformations that rise to cis and trans alkenes have energies that are 1:3 apart.
What is a simple alkene?The chemical substance known as an alkene, also known as an olefin, is one that exclusively contains hydrogen and carbon atoms and has at least one double bond between them. With just a double bond and no additional functional groups, the simplest alkenes combine to produce a coordination complex of hydrocarbons with general formula CnH2n.
How alkenes are formed?Elimination processes, which remove two atoms from adjacent carbon atoms to create a double bond, are typically used to create alkenes. Dehydration of alcohols, dehydrohalogenation on alkyl halides, and dehalogenation of alkanes are all steps in the preparation process.
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When 75. 4 j of energy is absorbed by 0. 25 mol of ccl4, what is the change in temperature? the specific heat of ccl4 is 0. 861 j/g· °c and its molecular mass is 153. 8 g/mole.
The change in temperature of the system is 2.28 °C.
The change in temperature of the system depends on the heat released. The total heat received by the system will equal to total heat released by objects. It should follow
Q released = Q received
The heat can be defined by
Q = m . c . ΔT
where Q is heat, m is mass, c is the specific heat constant and ΔT is the change in temperature.
The given parameters are
Q = 75.4 J
n = 0.25 mol
Mr CCl₄ = 153.8 g/mole
c = 0.861 J / g. °C
Find the mass of CCl₄
n = m / Mr
0.25 = m / 153.8
m = 38.45 grams
Find the change in temperature
Q = m . c . ΔT
75.4 = 38.45 . 0.861 . ΔT
ΔT = 2.28 °C
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What are 3 things required on a workplace label?.
Product identifier or name information about safe handling practices, Make utilize the MSDS (Material Safety Data Sheet).
How does necessary mean?Verb: required, requireding. Used with object. to be in need; to require: He needs medical attention. to authoritatively request; command or compel to perform an action: to demand that an agent account of money spent. to demand anything with authority or urgent.
Are necessary and demanded the same thing?The primary distinction between a need and a requirement is that a need refers to the aims and objectives that a business must accomplish, whilst a requirement refers to the actions we must do to fulfill a need. The terms "need" and "requirement" are occasionally used interchangeably.
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What are the boxes in pivot table field list?.
The four sections of the pivot table—Report Filter, Column Labeling, Row Labels, and Values—are located at the bottom of the Self - configuration Field List window.
What are pivot tables and how do they function?One of the fundamental tools for data is the pivot table. Many significant business concerns can be swiftly resolved with pivot tables.
Pivot Tables can be thought of as a form of visual storytelling even if they are merely tables and lack real graphics.
Can two Pivot Tables be combined?Most tools demand the somewhat tedious process when comparing two Table or merging them. With some exclusions, like Lumeer, numerous Pivot Table that have the same structure can be laid over.
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balance the following equation: NaCI + F2 -> NaF + CI2
Answer:
2NaCl + F2 -> 2NaF + Cl2
Explanation:
Answer:
2NaCl +F2 = 2NaF + Cl2
reactant product
Na=2 Na=2
Cl=2 Cl=2
F=2 F=2
