Answer:
b
Explanation:
temporary bc it's have time so the water can cycle
Describe
the kinetic-potential energy
conversions that occur when
a basketball bounces
At the moment the ball hits the ground, its kinetic energy is greatest and its potential energy is zero.
Determine the moles if given 20.3g of beryllium
Answer:
5.075moles
Explanation:
First get the molecular mass of beryllium which is 4g/mol.
Then input your given mass...
Formular for mole =mass/molecular mass
Mole=20.3g/4g/mol
=5.075moles
What is the organism with modified genome called
Answer:(GMO)
Explanation: genetically modified organism (GMO)
Iron metal can be obtained from iron ore, iron (III) oxide. When the iron (III) oxide is reacted with carbon monoxide gas it forms iron metal and carbon dioxide gas. If 75.0 grams of iron (III) oxide are reacted with 50.0 g of carbon monoxide gas, what is
the theoretical yield of iron metal that can be produced?
Equation: ?
Limiting Reactant: ?
Excess: ?
Grams of target product produced:
The theoretical yield of iron metal is 42.3 g
The equation for the reaction is:
Fe₂O₃ + 3CO → 2Fe + 3CO₂
Since, all of the carbon monoxide was consumed during the reaction, then carbon monoxide is the limiting reactant
Thus, iron (III) oxide is the excess reactant
StoichiometryFrom the question, we are to determine the theoretical yield of iron metal
First, we will write the balanced chemical equation for the reaction
The balanced chemical equation for the reaction is
Fe₂O₃ + 3CO → 2Fe + 3CO₂
This means
1 mole of iron(III) oxide reacts with 3 moles of carbon monoxide to produce 2 moles of iron metal and 3 moles of carbon dioxide gas.
Now, to determine the theoretical yield of iron metal
First, we will determine the number of moles of each reactant present
For iron(III) oxideMass = 75.0 grams
Molar mass = 159.69 g/mol
Using the formula,
[tex]Number \ of \ moles = \frac{Mass}{Molar\ mass}[/tex]
Then,
Number of mole of Fe₂O₃ present = [tex]\frac{75.0}{159.69}[/tex]
Number of mole of Fe₂O₃ present = 0.46966 mole
For carbon monoxideMass = 50.0 g
Molar mass = 44.01 g
Then,
Number of moles of CO₂ present = [tex]\frac{50.0}{44.01}[/tex]
Number of moles of CO₂ present = 1.136105 moles
Now,
If 1 mole of iron(III) oxide reacts with 3 moles of carbon monoxide to produce 2 moles of iron metal
Then,
0.378702 mole of iron(III) oxide will react with 1.136105 moles of carbon monoxide to produce 0.757403 moles of iron metal
Therefore, the number of moles of iron metal that would be produced is 0.757403 moles
Now, for the mass of the iron metal
Using the formula
Mass = Number of moles × Molar mass
Atomic mass of iron metal = 55.845 g/mol
Then,
Mass of iron metal that would be produced = 0.757403 × 55.845
Mass of iron metal that would be produced = 42.29717 g
Mass of iron metal that would be produced ≅ 42.3 g
Hence, the theoretical yield of iron metal is 42.3 g
The equation for the reaction is:
Fe₂O₃ + 3CO → 2Fe + 3CO₂
Since, all of the carbon monoxide was consumed during the reaction, then carbon monoxide is the limiting reactant
Thus, iron (III) oxide is the excess reactant
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The pOH of a solution is 3.45. What is the OH⁻ concentration in the solution?
The concentration of the hydroxide ion [OH¯] in the solution having a pOH of 3.45 is 3.55×10¯⁴ M
What is pOH?The pOH of a solution simply defines the concentration of the hydroxide ion [OH¯] in the solution. It can be expressed mathematically as
pOH = –Log [OH¯]
How to determine the value of [OH¯]From the question given above, the following data were obtained:
pOH = 3.45concentration of hydroxide ion [OH¯] =?pOH = –Log [OH¯]
3.45 = –Log [OH¯]
Multiply through by –1
–3.45 = Log [OH¯]
Take the anti-log of –3.45
[OH¯] = anti-log of (–3.45)
[OH¯] = 3.55×10¯⁴ M
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PLS HELP!!!
Determine which of the following properties are physical properties and which are chemical properties. Explain why you categorized each property as either physical or chemical.
Answer:
Physical: Conducts Electricity, Magnetic, Malleable and ductile
Chemical: Rusting, reacts with acid
Explanation:
The reason, why I categorized the listed items as "Physical" was because there is no major change, no matter if it is magnetic, malleable, etc. The item is still in its original form.
Whilst the reasons I put rusting, and reacting with acid as chemical, is because when an item rusts, you can no longer change it back to its original state, and when you an item reacts with the acid, at times (depending on the metal, it will create or form compunds)
Based on the traits, which traits were most prevalent in the class? Did you have more traits aligned with the dominant traits or more that were rare? If you have a rare trait, which do you have?
Answer:
Image result for Based on the traits, which traits were most prevalent in the class? Did you have more traits aligned with the dominant traits or more that were rare? If you have a rare trait, which do you have?
The Big Five personality traits are extraversion (also often spelled extroversion), agreeableness, openness, conscientiousness, and neuroticism. Each trait represents a continuum. Individuals can fall anywhere on the continuum for each trait. The Big Five remain relatively stable throughout most of one's lifetime.
Explanation:
Each of the items pictured represents a different
chemical reaction. Rank these four reactions in
order from fastest to slowest
1, 3, 2,4
4, 3, 1.2
3, 1. 4. 2
3, 2, 4, 1
1. Egg cooking
2. Metal rusting
DONE
3. Wood busing
4. Cement hardening
Answer: C. 3, 1, 4, 2
Explanation:
Got It Right On Edge
Answer:
C
Explanation:
What is the atomic mass of an oxygen isotope that has 8 protons and 10 neutrons in its nucleus? 8 amu 10 amu 18 amu not enough information to calculate.
The atomic mass can be defined as the mass of neutrons and protons in the atom. The atomic mass of the oxygen isotope is 18 amu.
What is an atom?An atom is the smallest particle comprised of three subatomic units, namely electrons, protons, and neutrons.
The number of electrons in the atoms determines the atomic number, while the number of protons and neutrons determines the atomic mass.
The atomic mass can be given as:
[tex]\rm Atomic\;mass=Neutrons+Protons[/tex]
The oxygen isotope has been comprised of 10 neutrons and 8 protons. The atomic mass of the isotope is given as:
[tex]\rm Atomic \;mass=10+8\;amu\\Atomic\;mass=18\;amu[/tex]
The atomic mass of the oxygen isotope is 18 amu. Thus, option C is correct.
Learn more about atomic mass, here:
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Answer:
18 amu
Explanation:
atomic mass = #protons + #neutrons = 8 + 10 = 18 am
how could two objects change in order for there to be a stronger electric force between them?
Answer:
Increasing the separation distance between objects decreases the force of attraction or repulsion between the objects.
Is it possible that the room gets warmer due to our body heat?.
Answer:
no because humans turn their extra body heat into sweat instead of dissipate heat through evaporation in the air.
Explanation:
hope this helps!
Which property makes the materials used in fiber optic cables so useful?
A) high density
B) the ability to conduct heat
C) the ability to reflect electromagnetic waves
D) malleability
Answer:
nosé inglés y no se está pregunta
How many h+ ions are present in 65. 5 mL of 0. 722 M sulfuric acid
Answer:
are there answer options
Explanation:
A 1.0 L balloon has a pressure of 2 atm. When the pressure increases to 400 kPa, what is the volume?
why do fresh egg sink and rotten egg float
Answer:
As the egg ages, air enters the egg and the air cell becomes larger and this acts as a buoyancy aid. Generally, fresh eggs will lie on the bottom of the bowl of water.
Eggs that tilt so that the large end is up are older, and eggs that float are rotten.
Explanation:
hope it helps
guys i have a earth science test in the morning and i don’t understand anything from the whole unit
what do i do?
The study of earth science is very easy to understand. It is very possible to get confused when studying for a test. The right thing to do is to be calm, meet someone who can put you through in areas you don't understand and also take you time in using different methods of comphenesion.
What is Earth science?Earth science is known to be the study of the structure or the form of the Earth along with its properties and its processes. Knowing this will help you known more about maintenance of life on our planet.
Most times when people have test, they often have tension and other kinds of things that tends to make them not to focus on their studies. But you don't have to worry. Be calm, ask a much older and learned person for help in areas you do not understand and read it over again.
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What magma would have formed from the partial melting of mantle material?.
Answer:
Basaltic magma is formed through dry partial melting of the mantle. The mantle lies just below the crust of the earth. Basalts make up most of the ocean’s crust; this is why basaltic magma is typically found in oceanic volcanoes. See also what substances are emitted from fumaroles? What type of melting produces most basaltic magmas?
Explanation:
please add me as brainliest..
Which is a process that converts sunlight energy into a compound that stores chemical energy?.
Answer:
Photosynthesis
Explanation:
If thats one of the options, thats the answer. Let me know if its not, and I'll be glad to help :)
Answer:
photosynthesis is the answer
Explanation:
because organisms convert light energy into chemical energy which can be stored in molecular bonds
Why is cycling carbon important
It's important for a few reasons actually
here you go have a nice day
. Carbon is an essential element for all life, so understanding how it moves helps us to understand biological processes and factors that influence them.
. One form carbon take's is the greenhouse gas carbon dioxide, CO2. Increased levels of carbon dioxide insulate the Earth, causing temperatures to rise. Understanding how carbon dioxide is absorbed and released helps us understand the climate and predict global warming.
. Carbon is not in balance, so it's important to learn where it is being stored and released. The rate at which carbon is deposited into living organisms is not the same as the rate it is returned to the Earth. There is about 100x more carbon in living matter than in the Earth. Burning fossil fuels releases massive amounts of carbon into the atmosphere and to the Earth.
. The carbon cycle is tied to the availability of other elements and compounds. For example, the carbon cycle is tied to the availability of oxygen in the atmosphere. During photosynthesis, plants take carbon dioxide from the air and used it to make glucose (stored carbon), while releasing oxygen.
Christopher conducts an experiment in which he tests how much sugar dissolves at different temperatures of water. One step requires him to use water with a temperature of 32.5°C. What is this temperature in kelvins? Record your answer to the nearest tenth.
Answer:
305.65 K
Explanation:
Celsius to Kelvin => + 273.15
32.5 + 273.15
= 305.65 K
Answer:
The answer is:
305.5K
Explanation:
I did the assignment on Edge, 2022.
(See the attachment below.)
Hope this helped, good luck on the Quiz! <3
Calculate the pH of a solution made by adding 2. 60 g of lithium oxide (Li2O) to enough water to make 1. 700 L of solution
To solve this problem, let's write out the equation of reaction
[tex]Li_2O + H_2O \to 2LiOH[/tex]
pH of a SolutionThe pH of a solution indicates it's level of acidity. But in this question, lithium oxide dissolves in water to produce lithium hydroxide.
We can calculate the acidity of the solution by;
The numbers of moles is
[tex]n = \frac{mass}{molar mass}\\n = \frac{2.6}{30}\\n = 0.086 moles[/tex]
1 mole of Li2O produce 2 moles LiOH
0.086 moles of H2O will give
[tex]2 * 0.086 moles = 0.173 moles of LiOH[/tex]
The molarity of LiOH
[tex]n = \frac{moles}{volume} = \frac{0.173}{1.70} = 0.102M[/tex]
Since we have the pOH of the solution, let's calculate the pH of the solution
[tex]pH + pOH = 14\\pH = 14 - pOH\\pOH = 0.99\\pH = 14 - 0.99 = 13.009[/tex]
The pH of the solution is equal to 13.0
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How many elements are metalloids
a reaction requires 2.5 moles of zinc oxide. how many grams would this equate to?
Answer: 45.038
Explanation: 2.016 H (2*1.008) + 15.999 O (1*15.999)
One mole of Zn weighs about 65.4 grams. Therefore, the mass equivalent to 2.5 moles is number of moles times the atomic mass that is 163.5 here.
What is one mole ?Any substance containing 6.022 × 10²³ atoms is called one mole of that substance. This number is called Avogadro number. Thus one mole of any element contains Avogadro number of atoms.
The mass of one mole of the element is called its atomic mass. Similarly the mass of one mole of a compound is called its molar mass. Zinc is a transition metal.
Atomic mass of Zn = 65.1 g
thus, mass of 2.5 mole of Zn = 65.1 × 2.5 = 163.5 g.
Therefore, the mass of 2.5 moles of Zn is 163.5 g
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Copper(ii) chloride reacts with sodium nitrate to produce copper(ii) nitrate and sodium chloride.
Answer:
CuCl2 + 2NaNO3 - > Cu(NO3)2 + 2NaCl
What is the most abundant greenhouse gas in the atmosphere?.
Answer:
Water vapor is the most abundant greenhouse gas in the atmosphere.
A sample of propane, C3H8, occupies 1.73 mL when the pressure is 320 torr at 30 C. What is the volume at STP
The volume of the sample of propane at STP is 0.62 mL.
What is volume?Volume is the amount of space that a substance or object occupies.
To calculate the volume of gas at STP, we apply the formula below.
Formula:
PV/T = P'V'/T'................. Equation 1Where:
P = Initial pressure of gasV = Initial volume of gasT = Initial temperature of gasP' = Standard pressure (SP)T' = Standard temperature (ST)V' = Volume of gas at STP.Make V' The subject of the equation
V' = PVT'/P'T.............. Equation 2From the question,
Given:
P = 320 torrV = 1.73 mLT = 30 °C = (30+273) K = 303 KP' = 760 torrT' = 273 KSubstitute these values into equation 2
V' = (320×1.73×273)/(760×303)V' = 0.62 mLHence, the volume of the sample of propane at STP is 0.62 mL.
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Schools
School
Based on the graph from Experiment 1, the total number of chemicals present in the houses from the south side of town
was how much less than the houses on the west side of town?
less chemicals
Bless chemicals
52 less chemicals
D26 liess chemicals
Rain off and
Answer:
how ston age humans made hand areas
20) When ice melts, what happens to the water molecules?
Answer:
start moving faster
Explanation:
i would guess because they slow down our freeze when they get cold
SOMEONE PLEASE HELP ME WILL MARK BRAINLIEST PLEASE!!
O₂ required = 1/2 x 7.8 = 3.9 moles
given the fact that nitrogen is abundant in the atmosphere why is it included in fertilizers
Answer:
Explanation:
Nitrogen fertilizers are added to soil because nitrogen is very important for plant growth and most organisms can not utilize atmospheric nitrogen. Even though the percentage of nitrogen in the atmosphere is very high, yet it is not available to most living organisms for use because the energy required to break the bonds that hold the diatomic nitrogen together is very high
