When a negatively charged substance is brought near the ion, the ion will attract the substance because the ion has more protons than electrons.
What is an ion?We define an ion as a specie that either has more negative charges than positive charges, or a specie that has more positive charges than negative charges. In either case, the number of charges that you have in an ion can never be the same, the number of one type of charge must be greater than the number of the other type of charge.
We can now see that from the table that we have in the question, the number of the positive charges is greater than the number of the negative charges. This implies that what we have is a positive charge and in consonance with the first law of electrostatics, it is going to be attracted by the negative charge.
Learn more about ions:https://brainly.com/question/14982375
#SPJ1
Aqueous hydrobromic acid (HBr) will react with solid sodium hydroxide (NaOH) to produce aqueous sodium bromide (NaBr) and liquid water (H₂O).
Suppose 3.2 g of hydrobromic acid is mixed with 1.14 g of sodium hydroxide. Calculate the maximum mass of sodium bromide that could be produced by the
chemical reaction. Round your answer to 3 significant digits.
The 0.27 * 10-3 g of NaBr is formed.
What do you mean by limiting reactant?
A reactant that is completely consumed at the end of a chemical reaction is known as the limiting reagent.
HBr(aq) + NaOH(aq) ==> NaBr(aq) + H2O(l)
To solve this question, first, find out the limiting reactant.
To find a limiting reactant,
Divide moles of each reactant by the coefficient in the given balanced equation (1 for each in this case) and whichever is lower is the limiting reactant.
For HBr: 3.2 g HBr x 1 mol HBr / 80.9 g = 0.039 mols HBr
For NaOH: 1.14 g NaOH x 1 mol NaOH / 40 g = 0.028 mols NaOH
Hence, NaOH is a limiting reactant
Theoretical yield of NaBr = 0.028 mols NaOH x 1 mol NaBr / mol NaOH x 103 g NaBr / mol = 0.27 * 10-3 g NaBr.
Hence, the answer is 0.27 * 10-3 g
To learn more about hydrobromic acid Check the given link
https://brainly.com/question/2279831
#SPJ9
Which of the following is the most basic?
A solution with [OH-] = 1.0×10-10.
A solution with [H+] = 1.0×10-10.
A solution with a pH of 6.
A solution with [OH-] = 1.0×10-6.
A solution with [H+] = 1.0×10-6.
Answer:
A solution with [H+] = 1.0×10-10
Explanation:
Using the equations: pOH = -log([OH-]), pH = -log([H+]), and pH + pOH = 14
To find the most basic solution, find the pH or the pOH.
The pOH of solution 1 is 10, which means the solution is acidic (pH = 4)
The pH of solution 2 is 10, which is quite basic
The pH of solution 3 is 6. slightly acidic
The pOH of solution 4 is 6, and has a pH of 8. Slightly basic
The pH of solution 5 is 6, slightly acidic
Out of all of these, solution 2 and 4 are basic. Solution 2 has a pH of 10, which is more basic than solution 4 with a pH of 8
Consider the reaction between copper(II) chloride and aluminum.Write the general skeleton reaction.Write the balanced reduction half reaction.Write the balanced oxidation half reaction.Write the balanced net ionic equation.Write the full balanced redox reaction.
Answer:
• General skeleton reaction:
[tex]CuCl_{2}+Al\operatorname{\rightarrow}AlCl_{3}+Cu[/tex]• Balanced reduction half reaction:
[tex]3Cu^2+6e^-\operatorname{\rightarrow}3Cu^0[/tex]• Balanced oxidation half reaction:
[tex]2Al^0\operatorname{\rightarrow}2Al^3+6e^-[/tex]• Balanced net ionic equation:
[tex]3Cu^{+2}+2Cl^{-1}+2Al^0\operatorname{\rightarrow}3Cu^0+2Al^{+3}+3Cl^{-1}[/tex]• Full balanced redox reaction:
[tex]3CuCl_2+2Al\rightarrow2AlCl_3+3Cu[/tex]Explanation:
1st) It is necessary to write the skeleton reaction (unbalanced reaction):
[tex]CuCl_2+Al\rightarrow AlCl_3+Cu[/tex]In the reaction, copper (II) chloride react with aluminum to produce aluminum chloride and copper.
2nd) We need to know the oxidation number of each atom in the reaction, then we can find the element that oxidized and the element that id reduced:
Oxidation numbers:
+2 -1 0 +3 -1 0
[tex]CuCl_{2}+Al\operatorname{\rightarrow}AlCl_{3}+Cu[/tex]With the oxidation number we can see that Al goes from 0 to +3, so the aluminum atom oxidizes. And, the copper atom goes from +2 to 0, so it is reduced.
3rd) To write the balanced reduction half reaction, it is necessary to balance all elements except oxygen and hydrogen (in this case, there is no oxygen or hydrogen atoms).
[tex]Cu^{+2}+2e^-\rightarrow Cu^0[/tex]Then, it is important to balance the electrons in each half reaction, so in the Cu half reaction we have to multiply everything by 3:
[tex]\begin{gathered} (Cu^2+2e^-\operatorname{\rightarrow}Cu^0)*3 \\ 3Cu^2+6e^-\operatorname{\rightarrow}3Cu^0 \end{gathered}[/tex]4th) To write the balanced oxidation half reaction, we have to proceed like in the previous step:
[tex]Al^0\rightarrow Al^{+3}+3e^-[/tex]We have to balance the electrons here too, but in this case we have to multiply by 2:
[tex]\begin{gathered} (Al^0\operatorname{\rightarrow}Al^3+3e^-)*2 \\ 2Al^0\operatorname{\rightarrow}2Al^3+6e^- \end{gathered}[/tex]Note: Electron balance is done to cancel out the electrons in both reactions, so we need to have the same number of electrons on each side of the half reactions.
5th) Now, we can write the balanced net ionic equation, without the electrons:
[tex]3Cu^{+2}+2Cl^{-1}+2Al^0\operatorname{\rightarrow}3Cu^0+2Al^{+3}+3Cl^{-1}[/tex]6th) Finally, we can write the full balanced redox reaction, including the other elements, in this case Cl:
[tex]3CuCl_2+2Al\rightarrow2AlCl_3+3Cu[/tex]How many molecules of acetylene (C2H2) are in 1.79 moles of acetylene
The simplest alkyne chemical molecule, known as acetylene chemically, is C2H2. Ethyne, Narcy Len, and Vinylene are other names for acetylene.
C2H2 has how many moles?Two. C2H2 molecules contain 2 carbon atoms each. As a result, there are 2 moles of carbon atoms in every mole of C2H2. You may determine how many moles of an element there are in one mole of a compound by looking at the subscripts in any formula.
The C2H2 chemical formula
Acetylene has the extended chemical formula CHCH and the chemical formula C2H2. Acetylenes' molar mass can be expressed as 26.04 g/mol-1.
Grams Acetylene = 46.60673120000018
Mol = 1.79.
C2H2 molecule
Acetylene, C2H2 / Formula is below.
To Learn more About C2H2 chemical formula, Refer:
https://brainly.com/question/1596622
#SPJ10
Hydrogen is 99% 1H, 0.8% 2H, and 0.2% 3H. Calculate its average atomic mass.
What are some characteristics that show a tree is living?
Select all that apply.
It has no cells.
It doesn’t respond to the environment.
It grows.
It moves.
It reproduces.
BaCl₂ + H₂SO4
Ba=
Cl=
H=
→ BaSO4 + HCI
Ba=
Cl=
H =
The balanced equation is BaCl₂ + H₂SO₄ → BaSO₄ + 2HCI.
What is Chemical Reaction ?Chemical reaction is a type of reaction in which one or more substances means reactants are converted to one or more different substances means products are formed.
The given reaction is
BaCl₂ + H₂SO₄ → BaSO₄ + HCI.
Reactant side Product Side
Ba = 1 Ba = 1
Cl = 2 Cl = 1
H = 2 H = 1
S = 1 S = 1
O = 4 O = 4
Here we can see that in the reactant side there are 2 Cl atoms and on the product side there is 1 Cl atom. Also on the reactant side there are 2 H atoms and on the product side there is 1H atom. To balance the above equation multiply by 2 on the product side.
BaCl₂ + H₂SO₄ → BaSO₄ + 2HCI.
Reactant side Product Side
Ba = 1 Ba = 1
Cl = 2 Cl = 2
H = 2 H = 2
S = 1 S = 1
O = 4 O = 4
From the above equation we can see that the given equation is now balanced.
Learn more about Chemical Equation here: https://brainly.com/question/11231920
#SPJ13
NOTE: The given question is incomplete on the portal. Here is the complete question.
Question: Balance the given chemical equation:
BaCl₂ + H₂SO₄ → BaSO₄ + HCI.
The same organic molecule has a mass of 2.49x10^-19 mg. what is the molecular formula?Previous question:an organic compound which is commonly found in fragrances and flavors was determined to contain Carbon, Hydrogen, and Oxygen. It contains 64.00% Carbon and 4.03% Hydrogen by mass. Determine the empirical formula.Answer: C3H2O
The empirical formula is simply the ratio of each atom in the molecule.
The molecular formula is the actual number of each atom in one molecule.
To find it, we need to first find the mass of the empirical formula.
The empirical formula is C₃H₂O, so it has 3 carbon, 2 hydrogen and 1 oxygen.
The mass of these atoms are:
- Carbon: approximately 1.99 x 10⁻²⁰ mg
- Hydrogen: approximately 1.67 x 10⁻²⁰ mg
- Oxygen: approximately 2.66 x 10⁻²⁰ mg
So, the mass of the empirical formula is:
[tex]\begin{gathered} m_e=3\cdot1.99\times10^{-20}mg+2\cdot1.67\times10^{-20}mg+1\cdot2.66\times10^{-20}mg \\ m_e=(5.97+3.34+2.66)\times10^{-20}mg \\ m_e=11.97\times10^{-20}mg \\ m_e=1.197\times10^{-19}mg \end{gathered}[/tex]Now, we can see how many of this empirical formula we have in the molecular formula, so we divide the given mass of the molecule by the mass of the empirical mass:
[tex]\frac{2.49\times10^{-19}mg}{1.197\times10^{-19}mg}=\frac{2.49\times\cancel{10^{-19}mg}}{1.197\times\cancel{10^{-19}mg}}=2.0802\ldots\approx2[/tex]That is, the actual mass of the molecule is double the mass of the empirica formula, which means that we have twice as many of each atom in th molecular formula:
Molecular formula: (C₃H₂O)₂ -> C₆H₄O₂
HELPPPP
A rotating space heater used 1,400 joules of energy while heating a room. Of that total, 896 joules produced thermal energy, 181
joules produced kinetic energy, 203 joules produced light energy, and 120 joules produced sound energy. What is the space
heater's efficiency? (1 point)
O 156.25%
O 36%
O 64%
O 56.25%
The efficiency of the thermal rotating space heater is obtained as 64%.
What is the efficiency?When we talk about the efficiency we talk about the percentage of the useful energy that is expended in order to get work done. Recall that we define the energy as the ability to do work. In this case, we are told that a rotating space heater used 1,400 joules of energy while heating a room. Of that total, 896 joules produced thermal energy, 181 joules produced kinetic energy, 203 joules produced light energy, and 120 joules produced sound energy as we can see in the question that is shown above.
We know that according to the law of the conservation of energy, energy can not be created nor destroyed hence the sum of the energy that obtained from the rotating space heater is constant.
In the light of that, the efficiency is;
896 joules/ 1,400 joules * 100/1
= 64%
Learn more about efficiency of a machine: https://brainly.com/question/7672500
#SPJ1
Answer:
1. EfficEfficiency= output energy/input energy x 100
2. 64%
3.friction between the box and the inclined plane.
4.640 JOules
5. the lost energy is not truly lost but it changed into a different form.
Explanation:
here you go my little guys
(ﾉ◕ヮ◕)ﾉ*:･ﾟ✧
Pure Aluminum foil
distilled water
NaCl (table salt)
Gold Bar (pure Au)
All of these may be classified as
Responses
A organic compound.organic compound.
B compounds.compounds.
C pure substances.pure substances.
D elements.
Pure Aluminum foil ,Gold Bar (pure Au) is element and element is pure substance. distilled water, NaCl (table salt) is pure substances .
Pure substance are the kind of matter which cannot be separated into its constituent particle . pure substance made up of only the one kind of matter.
Element is made up of only one type of atom .An element is a pure substance which contain only one kind of atom and cannot be separated by into simpler substances. Therefore , elements comes under pure substances.
Thus, Pure Aluminum foil ,Gold Bar (pure Au) is element and element is pure substances. distilled water, NaCl (table salt) is pure substances .
To learn more about pure substances here
https://brainly.com/question/24462192
#sPJ1
Is this correct your basically dividing and multiply and can you create a graph of this data table? Pleaseee help I’m so lost
According to the given table, the last three spaces in "Calculate constant PV" are:
[tex]\begin{gathered} 15.0\cdot69.9=1048.5 \\ 17.5\cdot58.8=1029 \\ 20.0\cdot50.7=1014 \end{gathered}[/tex]We will plot a graph using the values of volume in the x axis, and the values of pressure in the y axis. Once we plot each of the points, we will obtain this graph:
Convert 3.20 bar to atm
Answer:
~3.15815
Explanation:
Approximated Formula: Divide pressure value(bar) by 1.013
Bar and atm are significant units of pressure where, 1 bar is equal to 0.98 atm. 3.20 bar of pressure is equivalent to 3.15 atm.
What is pressure?Pressure is the force exerted in a surface per unit area. Hence, pressure has the unit of N/m². Pressure of a substance is depending on the volume and temperature.
The standard unit (SI unit) of pressure is atm or atmospheric pressure. Other units of pressure are bar, pascal, torr, mmHg etc. The normal atmospheric pressure is 1 atm.
The units of pressures can be interchanged with the specific relation between them.
1 bar of pressure = 0.987 atm
then, 3.20 bar = 3.20 bar × 0.987 atm/1 bar = 3.15 atm.
Therefore, 3.20 bar pressure is 3.15 atm .
Find more on pressure units:
https://brainly.com/question/24590300
#SPJ2
How many grams are in 0.90 mol of lead?
Answer:
[tex]186.3\text{ g}[/tex]Explanation:
Here, we want to get the mass of 0.90 mol of lead
To get the mass, we use the following formula:
[tex]\text{ mass = No of moles }\times\text{ atomic mass/molar mass}[/tex]The atomic mass of lead is 207 amu (this is obtainable from the periodic table)
Thus, we have the mass as:
[tex]0.90\text{ }\times\text{ 207 = 186.3 g}[/tex]What is the original pressure of a bike tire if the current pressure is 160atm and the volume changed from 1000mL to 700mL. Please show all work including the equation you used.
For this question, we can use Boyle's Law formula to answer, since this law is an experimental gas law that states that pressure and volume have an inverse relationship. The formula is:
P1V1 = P2V2
We have:
P1 = ?
V1 = 1000 mL
P2 = 160 atm
V2 = 700 mL
Now we add these values into the formula:
P1*1000 = 160*700
P1 = 112 atm
23423456789098765432
366373838384774738393
Explanation:
267277777727777525256 ;)
Jolie is staring at the Moon with her brother and comments that it looks "gibbous." What does Jolie mean by this
OA. The Moon looks rounded on both sides.
The Moon looks narrow.
The Moon looks narrow on one side and round on the other.
The Moon is just a small sliver.
B.
OC.
OD.
According to the given statement Jolie mean by The Moon looks rounded on both sides.
The correct option is A.
Why is it called a gibbous?Waxing gibbous refers to a moon that is more than halfway full and continues to increase its luminous surface. Gibbous, which means "hump" in Latin, has been used for centuries to refer to rounded or convex forms, such as enlarged eyes or a camel's back.
What happens during a gibbous?Gibbous Moon refers to the phase of the Moon when the side that faces Earth appears to be more than half-lit by the Sun but is less than fully lit. From new Moon through full moon and back, the lunar month, which is the full cycle of the Moon's stages, lasts 29 days.
To know more about Gibbous visit:
https://brainly.com/question/18214862
#SPJ13
The complete question is -
Jolie is staring at the Moon with her brother and comments that it looks "gibbous." What does Jolie mean by this
A. The Moon looks rounded on both sides.
B. The Moon looks narrow.
C. The Moon looks narrow on one side and round on the other.
D. The Moon is just a small sliver.
which element in period 3 has the greatest tendency to lose an electron?
The element in period 3 that has the greatest tendency to lose an electron is Sodium (Na)
Sodium is the first element in the period 3. In the periodic table, atomic size or atomic radius decreases from left to right.
We know that, higher the atomic radius higher the tendency to lose an electron by the element. In addition to that, sodium has only one valence electron in their outermost orbitals which would be easily lost to attain a stable state.
Thus, Sodium (Na) with higher atomic radius in period 3 and one valence electron in their outermost orbitals would have the higher tendency to lose an electron.
To know more about Atomic size
https://brainly.com/question/1127028
#SPJ1
Please help with all 5!!! Will give brainliest
1.00 mole of neon weighs 20.1797 g. This is its periodic table atomic weight in grams. The volume is specified as 22.4 L.
What is neon gas?The chemical element neon has the symbol Ne and the atomic number 10. It is classified as a noble gas. Under normal conditions, neon is a colorless, odorless, inert monatomic gas with about two-thirds the density of air. Neon is also used in the manufacture of high-voltage indicators and switching equipment, lightning arresters, diving equipment, and lasers. The cryogenic refrigerant liquid neon is very important. It has more than 40 times the refrigerating capacity per unit volume of liquid helium and more than three times the refrigerating capacity of liquid hydrogen. It can be found in trace amounts in both the Earth's atmosphere and the Earth's crust. It is commercially produced from liquid air using a process known as fractional distillation.1. 1.00 mole of neon weighs 20.1797 g. This is its periodic table atomic weight in grams. The volume is specified as 22.4 L.
2. This means that 22.4L of gas contains one mole of molecules. As a result, 112 cm3 of gas contains 5 10-3 moles of molecules.
3. The atomic mass of the Cl atom is 35.453 atomic mass units. This is the weighted average mass of chlorine in nature, including its isotopes. This means that one mole of chlorine atoms weighs 35.453 grams.
To learn more about neon gas, refer to:
https://brainly.com/question/23755100
#SPJ13
Which two actions are examples of science influencing technology?A. Using the internet to publish and share new scientific discoveriesB. Using research about kingfishers to design a more efficient high-speed trainC. Studying how infections spread through the body in order tobetter understand bacteriaD. Using observations about plant seed structures to develop hook-and-loop fasteners
The two actions that are examples of science influencing technology are:
A) Using the internet to publish and share new scientific discoveries.
D) Using observations about plant seed structures to develop hook-and-loop fasteners. Option A and D
These examples illustrate how scientific advancements and knowledge have influenced the development and application of technology.
Using the internet to publish and share new scientific discoveries is a prime example of science influencing technology. The internet has revolutionized the way scientific information is disseminated, allowing researchers to publish their findings rapidly and share them globally.
This has facilitated collaboration, accelerated the spread of scientific knowledge, and enhanced the efficiency of scientific communication. The internet has also given rise to platforms for open-access journals and online scientific communities, enabling greater accessibility and the democratization of scientific information.
Using observations about plant seed structures to develop hook-and-loop fasteners is another instance of science influencing technology. Scientists studying the natural world have observed the mechanisms by which certain plants disperse their seeds.
One such example is the observation of burrs or burdock plants that use tiny hooks to attach to animal fur or clothing. Inspired by these observations, scientists developed hook-and-loop fasteners, commonly known as Velcro, which mimics the natural hooking mechanism of the plant seeds.
This technology has found widespread applications in various fields, including clothing, aerospace, and medicine, offering a versatile and efficient fastening solution.
These examples highlight the reciprocal relationship between science and technology, where scientific discoveries and knowledge contribute to technological advancements, while technological developments, in turn, provide new tools and capabilities for scientific research and exploration.
For more such question on scientific discoveries visit:
https://brainly.com/question/28207278
#SPJ8
QUESTION 3Which of the following images represent the atomic structure of Fe2*, The circle represents the nucleus andthere are subatomic particles shown inside and outside the nucleus. (The shells are omitted)26e-23e-24e-23e
To solve this question, we need to know the mass number and atomic number of Fe. For this, we look at the periodic table.
Mass number of Fe: 55
Atomic number: 26
- The number of protons is equal to the atomic number of the element. So the number of protons (p+) is 26.
- The number of electrons in an atom that is neutral is the same as its number of protons. In this case, we don't have a neutral atom, we have a cation, Fe²⁺. The charge 2+ means that it lost 2 electrons in relation to its neutral atom. So we just subtract 26 - 2 = 24. The number of electrons (e-) is equal to 24.
- The number of neutrons we calculate using the following formula:
n = A - p
where: n = number of neutrons; A = atomic mass; p = number of protons.
A = 55
p = 26
n = 55 - 26 = 29
n = 29
Answer: p+ = 26
e- = 24
n = 29
Alternative "C"
Arrange the following elements in order of increasing size: Al, B, K, and Na
B < Na < Al < K
Explanations:The size of elements in the periodic table increases from right to left and top to bottom down the group.
For the given question, we will arrange the elements based on atomic size.
For the given elements
• Aluminum has an atomic number of 13
,• Boron has an atomic number of 5
,• Potassium has an atomic number of 19
,• Sodium has an atomic number of 11.
The increasing size will be based on their increasing atomic number and position in the periodic table.
The required increasing size will be B < Na < Al < K
////////////////////////////////////////////////////////
\
Answer:
///////////////////////////////////\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\
Explanation:
what properties of semiconductors make the useful in electronic devices
Useful electronic devices are perfect insulators.
Semiconductors are perfect insulators. The electron density in the conduction band at room temperature is not as high as that of metals, so they cannot conduct electricity as well as metals. The electrical conductivity of semiconductors is not as high as metals, but not as bad as electrical insulators. Low power loss. Semiconductors are getting smaller and lighter.
Resistivity is higher than conductors and lower than insulators. The resistance of semiconductor materials decreases with increasing temperature and vice versa. Conductivity level is the main difference between conductors semiconductors and insulators. Conductors are highly conductive. In other words, an energy such as electric heat, and sound can be easily conducted. Semiconductors allow moderate flux while insulators are poor conductors.
Learn more about Semiconductors here:-https://brainly.com/question/26111083
#SPJ1
QUESTION 13
What mass of 45.0% Ba(NO3)2 solution contains 40.0 grams of Ba(NO3)2?
88.9 grams of 45.0% Ba(NO3)2 solution contains 40.0 grams of Ba(NO3)2?
What is barium nitrate ?
The toxic and colorless inorganic substance with chemical formula
Ba(NO3)2 is barium nitrate. The exposure of this compound to flame gives a green-colored flame. The most common use of this compound is pyrotechnics.
Let x grams of Ba(NO₃)₂, solution contains 40 grams Ba(NO₃)₂
Then, 45% of x = 40
[tex]\frac{45}{100}[/tex] × x = 40
x = 88.9 grams
Thus we can conclude that 88.9 grams of 45.0% Ba(NO3)2 solution contains 40.0 grams of Ba(NO3)2
Learn more about mass percent at https://brainly.com/question/13896694
#SPJ13
Which is the equation for a machine's efficiency? (1 point)
O Efficiency=input energy
O Efficiency=
input energy
output energy
output energy
input energy
-
-
output energy
100
O Efficiency
O Efficiency=input energy + output energy
100
The efficiency of the machine can be obtained from the expression;
Work output/ work input * 100/1
What is the efficiency?The term efficiency has to do with the way in which energy is converted to a good use in the machine. Let us note that a machine is efficient when most of the work done by the machine has been put to a good use. This is shown by a very high value of the efficiency.
Let us note that a machine can only be able to do a useful work when the efficiency of the machine is high and the machine is able to do quite a whole lot of useful work as we shall see below.
As such, we define the efficiency as the ratio of the work input to the the work output multiplied by a hundred. We are now trying to obtain the equation that can more aptly be said to be the efficiency of the machine.
earn more about the efficiency of a machine:https://brainly.com/question/11752408
#SPJ1
What is the ionization energy of 30 g lithium when it is vaporized?
(1st ionization energy = 245 KJ/mole)
10.58 * [tex]10^{-2}[/tex] KJ ionization energy is needed to vaporized lithium.
What is ionization energy or enthalpy?Ionization energy may be defined in basic words as a measurement of an atom's or ion's propensity to give up an electron or the difficulty in removing an electron from one.
Mass of lithium = 30 gm
Ionization enthalpy of lithium = 245 KJ/mole
Now calculate moles of lithium = [tex]\frac{Given\ mass}{molar\ mass}[/tex]
no. of moles = [tex]\frac{30}{6.941}[/tex]
no. of moles = 4.32 moles
For 1 mole of lithium ionisation enthalpy = 245 KJ
for 4.32 mole of lithium ionisation enthalpy = 245 *4.32 KJ
= 10.58 * [tex]10^{-2}[/tex] KJ
To know more about ionization enthalpy refer to,
https://brainly.com/question/20658080
#SPJ9
7.0 x 10^7 ÷ 2.0 x 10^4
scientific notation
Answer:
3.5x10^3
Explanation:
When plugging this into the calculator and dividing them, the answer you get is 3,500.
In scientific notation, you want the decimal to be after the first number (in this case being the 3).
In 3500, our decimal is after the number (0), so we will be moving this decimal place 3 times to the left in order to be placed after the 3.
Now we have 3.500, and since to go back to the original number we had (3500.) we have to move the decimal back 3 places to the right (moving to the right is a positive number), then our answer would be 3.500x10^3.
Now we have to look for how many significant figures we need in our final answer. Since the numbers in our question are 7.0 and 2.0, they both have a total of 2 significant figures, meaning that our final answer has to have 2 significant figures.
Then, our final answer is 3.5x10^3.
***When multiplying or dividing, we round our final answer to the least number of significant figures in the numbers from our question.
***When adding or subtracting, we round our final answer to the least number of decimal places in the numbers from our question.
What is a spectator ion?A precipitate formed during the reactionAn ion that is directly involved in the reaction.An ion that is not directly involved in the reaction.A liquid formed during the reaction
Step 1 - What is an spectator ion?
We call spectator ions those that are not directly involved in the reaction. They only "see" the reaction happening, i.e., they are "spectators".
Step 2 - Answering the exercise
The correct answer is thus an ion that is not directly involved in the reaction.
The filament in an electric lightbulb is made from
At a birthday pool party, the temperature is 27.50°C and the atmospheric pressure is 755.4 mmHg. One of the decoration helium balloons has a volume of 6.25 L. What would be the volume of the balloon if it were submerged in a swimming pool to a depth where the pressure is 922.3 mmHg and the temperature is 25.35°C?
The new volume of the balloon, given that it was submerged to a depth where the pressure is 922.3 mmHg and the temperature is 25.35 °C is 5.08 L
How to determine the new volumeFrom the question given above, the following data were obtained:
Initial temperature (T₁) = 27.50 °C = 27.50 + 273 = 300.5 KInitial pressure (P₁) = 755.4 mmHgInitial volume (V₁) = 6.25 L New pressure (P₂) = 922.3 mmHgNew temperature (T₂) = 25.35 °C = 25.35 + 273 = 298.35 KNew volume (V₂) =?The new volume can be obtained by using the combined gas equation as illustrated below:
P₁V₁ / T₁ = P₂V₂ / T₂
(755.4 × 6.25) / 300.5 = (922.3 × V₂) / 298.35
Cross multiply
300.5 × 922.3 × V₂ = 755.4 × 6.25 × 298.35
Divide both side by (300.5 × 922.3)
V₂ = (755.4 × 6.25 × 298.35) / (300.5 × 922.3)
V₂ = 5.08 L
Thus, the new volume is 5.08 L
Learn more about gas laws:
https://brainly.com/question/14560487
https://brainly.com/question/26174511
#SPJ1
