Answer:
One mole of anything is 6.022×1023 everythings, including atoms. Multiply the moles Fe by 6.022×1023 atoms/mol. 3.77mol Fe ×6.022×1023atoms Fe1mol Fe =2.27×1024 atoms Fe rounded to three significant figures.
The number of atoms present is 1.5 moles of iron is 9.0 ×10²³ atoms
From the question,
We are to determine the number of atoms present in 1.5 moles of iron.
From the formula,
[tex]Number\ of\ moles = \frac{Number\ of\ atoms}{Avogadro's\ constant}[/tex]
Then, we can write that
Number of atoms = Number of moles × Avogadro's constant
∴ Number of atoms of iron present = 1.5 × 6.022×10²³
Number of atoms of iron present = 9.033 ×10²³ atoms
Number of atoms of iron present ≅ 9.0 ×10²³ atoms
Hence, the number of atoms present is 1.5 moles of iron is 9.0 ×10²³ atoms
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A hot plate, a large beaker of water, and grains of rice are used in a class demonstration. When the water begins to boil, the rice moves in a circular pattern. The model demonstrates
Answer:radiation
Explanation:
When the water begins to boil the rice moves in a circular pattern which means radiation will be the correct answer
How many atoms of aluminum (Al) are in 2.34 mol of aluminum?
Answer: " [tex]1.41 * 10^{24}[/tex] " atoms of aluminum (Al) .
____________________________________
Explanation:
_________________________
Using a technique called "dimensional analysis" ; as follows:
________________________
→ " [tex]\frac{2.34 mol Al}{1} * \frac{6.022*10^{23}atoms Al}{1 mol Al} = ?[/tex]
________________________
The units "mol Al" ["moles of aluminum"] cancel out; and we have:
________________________
→ "[tex][(2.34) * (6.022 * 10^{23})] = ?[/tex] atoms of Al [aluminum].
________________________
Note that by definition: 1 (one) "mole" (abbreviated "mol") of anything consists of " [tex]6.022*10^{23}[/tex] " units " of that particular thing.
This number: 6.022*10^{23} —is known as: "Avogadro's number".
________________________
→ [ 2.34 * 6.022 * 10^23] ;
= 1.409148 * 10^24 ;
→ Round to 3 (Three) significant figures;
→ since: "2.34" has 3 (Three) significant figures;
→ to get: " [tex]1.41 *10^{24}[/tex] atoms of aluminum (Al).
________________________
Hope this is helpful to you! Wishing you the best!
________________________
When 4.15 grams of silver nitrate is reacted with 1.11 grams of iron(III) chloride, which best represents the amount of silver chloride produced?
Answer:
The mass of silver chloride produced = 2.202 g
Explanation:
Equation of the reaction is given below
3AgNO₃(aq) + FeCl₃(aq) ----> 3AgCl(s) + Fe(NO₃)₃(aq)
molar mass of AgNO₃ = 170 g/mol
molar mass of FeCl₃ = 233.5 g/mol
molar mass of AgCl = 143.5 g/mol
3 moles of silver nitrate reacts with 1 mole of iron (iii) chloride to give 3 moles of silver nitrate
4.15 grams of AgNO₃ = 4.15/170 = 0.0244 moles of AgNO₃
1.11 grams of FeCl₃ = 1.11/233.5 = 0.0047 moles of FeCl₃
mole ratio of AgNO₃ to FeCl₃ = 0.0244/0.0047 = 5 : 1
therefore, FeCl₃ is the limiting reactant
0.0047 moles of FeCl₃ reacting will produce 0.0047 * 3 moles of AgCl = 0.0141 moles of AgCl
0.0141 moles of AgCl = 0.0141 * 143.5 g of AgCl = 2.02 g of AgCl =
Therefore mass of silver chloride produced = 2.202 g
After a lightning storm, the Rodriguez family notices the TV no longer works.
What probably caused this malfunction?
A. Power from the TV was pulled into the ground by the lightning.
B. A power surge burned an electric component of the TV.
C. The lightning sucked power from the TV.
D. The surge protector sucked power from the TV.
Answer:
B
Explanation:
A P E X
After a lightning storm, the Rodriguez family notices the TV is no longer working because a power surge burned an electric component of the TV. The correct option is B.
What is lightning?Lightning is a natural phenomenon that occurs when there is a collision of negative and positive charged particles. It appears as light or spark of electricity into the earth. It shines and affects the eyes if directly seen.
Lightning occurs when there is thunder or rain, lightning causes destruction to the earth, the houses, trees, and people are also impacted by this. The TV was not working because there was a short circuit due to lightning.
Thus, the correct option is B. A power surge burned an electric component of the TV during a lightning storm.
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The two major types of bonds are ___________________ and _____________________. Electrons are either ________________ or _______________ to fill the last shells of atoms that ions. The ____________________ number of an ion is either positive or negative. When we combine ions we can only combine _____________________ with ____________________ ions. When atoms share electrons they form ____________________ bonds. The electrons involved with bonding, in the last shell that are shared are called____________________ electrons. Three examples of macromolecules are _______________________, ________________________ and ___________________. The four main atoms involved in carbon chemistry are ____________________________.
Answer:
chemical bonds and covalent bonds
Explanation: covalent bonds are in which the valence electrons density is shared between two atoms and chemical bonds are the connections between atoms in a molecule . electrons can be either free [not attached to any atom] or bound to nucleus of an atom. atom or molecule is a number of an ion which is either positive or negative. when we combine ion we can only combine elements with ionic bonds. when atoms join together , they form chemical bonds without transferring any electrons but they rather share them. copper sulphide are the last shell that are shared with bonding . proteins, carbohydrates, lipids are the example of macromolecules . nucleic acids, lipids, proteins, carbohydrates are the main atoms involved in carbon chemistry.
HOPE THIS ANSWER HELP!!
Balance the equation for ethane C3H6 burning in oxygen to form carbon dioxide and steam. _____C3H6 + ____ O2 ---> CO2 + ____H2O
Answer:
2C3H6 + 9 O2 ---> 6 CO2 + 6 H2O
Explanation:
if you have 3g of sodium and 4g of chlorine what is the total mass of sodium chloride
Answer:
7g
Explanation:
Given parameters:
Mass of sodium = 3g
Mass of chlorine = 4g
Unknown:
Total mass of sodium chloride = ?
Solution:
This problem entails the direct application of the law of conservation of mass. According to this law, it states that "matter is neither created nor destroyed in the course of a chemical reaction".
So, when sodium and chlorine combines to form sodium chloride, to are expect to produce substance with a mass which adds up to the sum of the reactants;
Mass of sodium chloride = mass of sodium + mass of chlorine
= 3g + 4g
= 7g
PLEASE HELP ME I DON'T UNDERSTAND PLEASE HELP THIS IS MY LAST QUESTION I WILL GIVE BRAINLIEST
You have learned about the common characteristics of inner planets and outer planets. Explain how these
characteristics are verified observation and not just the options of scientists.
Answer:
Because they all have different characteristics and they are not just things that the scientists say. they are all different but some of them have the Same charateristics
A plant grows at the same rate as wheat plant 2. If the plant is 4.2 cm tall, calculate how old the plant is. Use the corrected trendline for wheat plant 2.
Answer:
The correct response is "3.127 weeks". A further explanation is given below.
Explanation:
As we know,
y = 1.3431x
Use, y = 4.2 cm
Now,
⇒ [tex]y = 1.3431x[/tex]
On substituting the values of y, we get
⇒ [tex]4.2=1.3431x[/tex]
⇒ [tex]x = \frac{4.2}{1.3431}[/tex]
⇒ [tex]=3.127 \ weeks[/tex]
Which victim requires CPR?*
Unresponsive, has strong pulse, and is breathing
unresponsive, no normal breathing and no pulse
Responsive, has a pulse, and having trouble breathing
O Responsive, having trouble breathing, and has a low pulse
Answer:
Responsive, having trouble breathing, and has a low pulse
Explanation:
The relationship between the endoplasmic reticulum and the Golgi complex is most similar to which of these examples? A a factory that creates a product and the shipping department that delivers it to customers B a farmer who grows food and people who cook and eat that food in different ways C a bus that picks up passengers and the passengers who get out at different stops D a power plant that makes electricity and the town that uses it to light their houses
Answer: Answer is A
Explanation:
The endoplasmic reticulum and the Golgi complex together make the endomembrane system. They are like factory and shipping departments. thus, option A is correct.
What are the endoplasmic reticulum and the Golgi?The endoplasmic reticulum (ER) is the membrane-bounded organelle that is a network-like structure that even has ribosomes attached to it (RER). They are the site of lipid and protein synthesis in the eukaryotic cell.
Golgi on the other hand, are organelle present in the cytoplasm that is the site of the packaging, storage, and transportation of the lipids produced by the ER to the other sites or out of the cell.
The endoplasmic reticulum act as a factory that manufactures lipids and proteins, whereas the Golgi act as a shipping department that packs and transports the molecules in vesicles to various sites.
Therefore, option A. ER acts as the factory and Golgi as the shipping department.
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What mass of aluminum is produced by the decomposition of 5.0 kg A l 2O 3? How many moles of oxygen are produced?
mass of Aluminum produced = = 2.647 kg
moles of Oxygen = 73.53 moles
Further explanationGiven
5.0 kg Al₂O₃
Required
moles of Oxygen
Solution
The aluminum oxide gets decompose into aluminum and oxygen gas.
Reaction :
2Al₂O₃(s)⇒ 4 Al(s) + 3O₂(g)
mol of Al₂O₃(MW=102 g/mol) :
= mass : MW
= 5000 g : 102 g/mol
= 49.02 moles
From the equation, mol ratio of Al₂O₃ : O₂ = 2 : 3, sol mol O₂ :
= 3/2 x mol Al₂O₃
= 3/2 x 49.02
= 73.53 moles
mol Al :
= 4/2 x mol Al₂O₃
= 2 x 49.02
= 98.04 moles
Mass Al :
= mol x Ar Al
= 98.04 x 27 g/mol
= 2647.08 g
= 2.647 kg
Name three things that are matter and why
in a hotel breakfast bar you see an older woman sticking a fork into a toaster to remove a piece of toast. You wamn her not to do that and she says. "You know, I always
wondered why fortes conduct electricity so well" As an astute chemistry student how would you explain it to her? Make sure you provide a relationship to
electronegativity proton pull and electron distribution in your answer
Answer: I guess have to like explain to her why to not stick the fork into the toaster.
Explanation:
Hope this helps
Answer:
its just how would you explain how it happens how the electricity passes through the fork but in a easy understandable way
Explanation:
for example... dont do that because......................then will go through the fork then to your arm and will cause....................... then you die
A certain chip W used in a circuit of a micro computer has a mass of 5.68 milligram ,calculate the amount of W in the micro computer (W=28g/mol)
The amount of W : = 1.22 x 10²⁰
Further explanationGiven
5.6 mg of a micro computer
Required
The amount of chip
Solution
A mole is a number of particles(atoms, molecules, ions) in a substance
1 mole = 6.02.10²³ particles
Can be formulated :
N = n x No
N = number of particles
n = mol
No = 6.02.10²³ = Avogadro's number
mass = 5.68 mg = 5.68 x 10⁻³ g
mol :
= mass : MW
= 5.68 x 10⁻³ g : 28 g/mol
= 2.03 x 10⁻⁴
The number of atoms :
= 2.03 x 10⁻⁴ x 6.02.10²³
= 1.22 x 10²⁰
Pls help! Urgent!
The law of conservation of mass states that the mass of the reactants is _____
the mass of the products.
A. Less than
B. Equal to
C. Greater than
Answer:
c
Explanation:
Answer:
b. equal too
Explanation:
According to the law of conservation of mass, the mass of the products in a chemical reaction must equal the mass of the reactants
Which is smaller: a
chromosome or a gene?
Answer:
A gene is smaller.
Explanation:
A gene is actually inside of a chromosome, therefore it's a smaller entity.
;
Genes are contained in chromosomes, which are in the cell nucleus. A chromosome contains hundreds to thousands of genes.
Answer: genes
Explanation: Genes are smaller because they are in the chromosomes.
What material would you use to replace synthetic materials and make the hot/cold pack environmentally friendly?
which is NOT balanced?
WILL GIVE BRAINLIEST
Answer:the third one hope this helped u may i plz get brainlist only if u wanna give me brainlist though have an good day kind sir or ma'ma.
Explanation:
12. A landslide is an example of
A. river deposition
B. glacial scouring
C.
mass movement
D. chemical weathering
Land slides are slopes of rocks in river side. The landslides are formed by the mass movement, volcanoes, earthquakes etc.
What are landslides?The sliding down of a slope of a mass of rock, rubble, or earth is known as a landslide. Landslides are a sort of "mass wasting," which refers to any downward movement of soil or rock caused by gravity alone. Five different slope movement types are referred to as "landslides": falls, topples, slides, spreads, and flows.
By the type of geologic material, these are further separated (bedrock, debris, or earth). Common landslide types include debris flows, often known as mudflows or mudslides, and rock falls.
Rainfall, snowmelt, changes in water level, stream erosion, changes in ground water, earthquakes, volcanic activity, disturbance from human activity, or any combination of these causes might start a landslide on a slope that was already about to move.
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In Mg3(PO4)2 there are
In Mg3(PO4)2 there are 13 atoms
Further explanationGiven
Mg3(PO4)2 compound
Required
The composition of the compound
Solution
Molecular formula (MF) is a formula that shows the number of atomic elements that make up a compound.
In the compound Mg3 (PO4) 2, there are 3 types of atoms, namely Mg, P, and O
The number of each of the atoms:
Mg = 3 atoms
P = 2 atoms
O = 8 atoms
Total atoms in the compound = 3 + 2 + 8 = 13 atoms
How much heat energy is required to raise the temperature of 386 grams of aluminum from 24.0°C to 100.0°C?
Answer:
is there no options?
Explanation:
Answer:
26.314KJ
Explanation:
The specific heat capacity formula is : [tex]Q=mc[/tex]Δ[tex]T[/tex], where Q is the heat energy, m is the mass, c is the heat capacity of the material, and delta T is the change in temperature.
We know from the question that m = 386grams and delta T = 100.0°C - 24.0°C = 76.0°C. From a simple search, we know the specific heat capacity of aluminum = 0.897J/g°C (this changes a little bit depends on the website you use, but the value should be very similar). Let's apply the formula:
[tex]Q=mc[/tex]Δ[tex]T[/tex]
[tex]Q = 386g (0.897J/gC)(76.0C)[/tex]
[tex]Q = 26314J[/tex] or [tex]26.314KJ[/tex]
Round according to your teacher's specification (example: significant figures) if needed.
2. Which type of glassware is used for general mixing, measuring and
boiling?
A. crucible
B. funnel
C. separatory funnel
D. beaker
Answer:
D
Explanation:
A beaker can be used for boiling coz it can withstand high temperatures.
It can be used for measuring the volume of a solid indirectly by measuring the displacement of a liquid.
It can as well be used for mixing coz it flat bottomed
Hydration is a specific kind of _______.
a.) dissociation
b.) dissolution
c.) ionization
d.) solvation
just take it for free,
Answer:
Thanks bro, I will gladly take them for free
Which element has chemical properties that are most similar to potassium?
Answer: Elements found in group 1 (Alkaline Metals)
Explanation: Any element found in group 1, such as Lithium, Sodium, Caesium, or Francium, have similar properties as potassium. Atoms that are found in the same group on the periodic table have similar chemical properties.
The theory of continental drift, a theory of a single, massive landmass that may have broken apart into what we associate with the modern landmasses and major continents was first supported by what significant evidence?
Answer:
So its a theory by Alfred Wegener is that All land was one big piece of land called pangea in the early 20th century people began to think that land masses can move such as many do just from it being there or natural disasters then going in to more research they found that when putting the continents together it fit like a puzzle and the fact that some fossils were far away from were the same were found
The theory of continental drift, based their theory on several lines of evidence, including the fit of the continents, paleoclimate indicators, truncated geologic features, and fossils.
What does the continental drift theory?The continental drift hypothesis states that all the continents were once joined together as one large mass of land, but then the land spread apart and drifted into their current positions.
The hot magma flows in convection currents due to tremendous heat and pressure within the earth. These currents cause the tectonic plates that make up the earth's crust to move.
Thus, The theory of continental drift, based their theory on many lines of evidence, including the fit of the continents, paleoclimate indicators, truncated geologic features, and fossils.
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i need help guys, i dont understand what is weak acid and bases.
Answer:
Weak acids and bases are only partially ionized in their solutions, whereas strong acids and bases are completely ionized when dissolved in water.
Explanation:
a) How much energy would be required to melt 500 grams of ice at 0°C to water at 0°C?
Heat required = Q = 40 kcal
Further explanationGiven
mass of 500 g ice
Required
Heat required
Solution
The heat to change the phase can be formulated :
Q = m.Lf (melting/freezing) Q = m.Lv (vaporization/condensation)Lf=latent heat of fusion
Lv=latent heat of vaporization
Lf for water = 334 kj/kg=6.01 kJ/mol = 80 cal/g
Phase change(ice to water)
Q= 500 g x 80 cal/g
Q = 40 kcal
What process can result when liquid water absorbs heat energy A condensation B evaporation C or D precipitation
Answer:
C.) evaporation
Explanation:
When water absorbs enough heat, it becomes a gas (water vapor). This process is called evaporation.
I hope this helps! :)
