3. To find an object's mechanical energy. you add its A kinetic and potential energy B kinetic and thermal energy C potential and thermale energy D kinetic and chemical energy
Answer:
A
Explanation:
The formula for mechanical energy is mechanical energy = kinetic energy + potential energy.
2. (10 Points) If something has a high heat capacity will it take a little energy or a
lot of energy to change its temperature? Defend your answer.
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1.
a) If 1.08 g of sodium sulfate reacts with an excess of phosphoric acid, how much sulfuric acid is produced? (0.74577)
b) If 0.726 g of sulfuric acid is produced in the laboratory experiment, what is the percent yield of sulfuric acid? (97.3190)
2.
If 3.2 moles of sodium sulfate is used in the reaction, how many formula units of phosphoric acid is needed to completely react?
(1.28427×1024
Answer:
1. a) 0.745 g of H₂SO₄
b) 97.4%
2. 1.28×10²⁴ formula units
Explanation:
First of all, we determine the equations:
3Na₂SO₄ + 2H₃PO₄ → 3H₂SO₄ + 2Na₃PO₄
We determine, the moles of sodium sulfate. (As the acid is in excess, we work with the salt)
1.08 g . 1mol/ 142.04g = 0.00760 moles.
Ratio is 3:3. So 3 moles of salt can produce 3 moles of sulfuric acid,
Then, 0.00760 moles will produce the same amount of acid.
We convert the moles to mass → 0.00760 mol . 98 g/mol = 0.745 g
Percent yield = (Produced yield /Theoretical yield) . 100
(0.726 g / 0.745 g) . 100 = 97.4 %
2. 3 moles of sodium sulfate need 3 moles of phosphoric acid to react
Then, 3.2 moles of salt will react to (3.2 . 2)/3 = 2.13 moles
Let's count the formula units:
2.13 mol . 6.02×10²³ formula units /mol = 1.28×10²⁴ formula units.
Explain what a conjugate acid is and what a conjugate base is.
Answer:
A conjugate acid, within the Brønsted–Lowry acid–base theory, is a chemical compound formed when an acid donates a proton to a base—in other words, it is a base with a hydrogen ion added to it, as in the reverse reaction it loses a hydrogen ion
Explanation:
According to the A.P.E.X. glossary:
A conjugate acid is the form a base takes after it gains a hydrogen ion (or proton), and a conjugate base is the form an acid takes after it loses a hydrogen atom (or proton).
When you heat a sample of gas, what happens to the particles that make up the gas?
A) The particles move faster
B) The particles get bigger
C) The particles slow down
D) The particles get smaller
The particles of the gas move faster when you apply heat to a sample of gas.
WHAT IS A GAS?
A gas is one of the three states which matter can exist. A gas posseses no fixed shape or volume.
A gas is characterized by the ability to diffuse quickly through space because of the very weak attraction of its particles to one another.
WHAT DOES HEAT DO?
Heat (thermal energy) increases the kinetic energy i.e. energy due to motion of the particles, causing them to move faster. In the process, gas particles expands.
Therefore, when heat is applied to a sample of gas, the particles of the gas move faster.
Learn more: https://brainly.com/question/11973814
True or False. Single covalent bonds are stronger than triple covalent
bonds
Answer:
False
Explanation:
Triple covalent bonds are much more stronger than single covalent bonds. In single bond, 2 electrons are shared, in double bond four electrons are shared and in triple bond six electrons are shared. Thus, triple bond is difficult to break since it is the strongest bond. Between the two atoms, stronger the bond, more stable the molecule. Thus, triple bond is more stable.
I'm giving 20 points! please it's for a friend not me
Answer:
Three chemical elements: hydrogen, oxygen, and helium.
The difference between metals and metalloids is: metalloids have properties in between those of the metals and non-metals and are semiconductors.
The periodic table is organized by the elemts atomic number, it goes from the element with the lowest atomic number (which is hydrogen) to the element with the highest atomic number (oganesson)
Explanation:
Hope this helps :)
Answer: Thank you for the points.
Explanation:
is the maximum population that a given area can support.
Carrying capacity
Population growth
Limiting factor
Immigration rate
The carrying capacity is the maximum number of individuals of a species that an environment can support. Population size decreases above carrying capacity due to a range of factors depending on the species concerned, but can include insufficient space, food supply, or sunlight.
Which of these statements is NOT true of the biosphere? *
A. It includes living things only.
B. It includes all of Earth's ecosystems.
.
C. It includes the parts of Earth in which organisms live.
Answer:
A is not true.
The biosphere contains living and nonliving things.
Let me know if this helps!
Sound Wave, Ripple in water, Guitar String, TV Signal, Which one does not belong? Why?
Answer:
The TV signal.
Explanation: Hope this is right! :)
2 K + Cl2 → 2 KCI what type of chemical reaction is this
nvm nvm check comments
Answer:
C
Explanation:
Common sense no offense lol
Name the three parts of the brain and one function of that part
cerebrum: interprets touch, vision, hearing, speech, etc.
cerebellum: coordinate muscle movements, posture, and balance
brainstem: connects cerebrum and cerebellum. performs automatic functions, breathing, body temperature, sneezing, etc.
Work = Force x Distance, calculate the amount of work done on an object
when a 300 N force acts on an object for a distance of 10 meters.
Please help and show work thanks
Answer:
3000 Joules
Explanation:
as you mentioned, w=fd
where w is the work done, in this scenario in the unit of Joules
the force, or f, is given to be 300N
the distance, or d, is given to be 10m
because joules is simplified to Newtons times Meters, all we need to do in this case is plug the givens into the equation.
so, 300 Newtons x 10 Meters = 3000 Joules
heelp plzzzzzzzz anyyyyyone
Answer: C
Explanation:
How does forming a bond make an atom stable?
Answer:
Explanation:
An ionic bond, where one atom essentially donates an electron to another, forms when one atom becomes stable by losing its outer electrons and the other atoms become stable (usually by filling its valence shell) by gaining the electrons. Covalent bonds form when sharing atoms results in the highest stability.
Which atom has the lowest(smallest) ionization energy?
A. Na
B.K
C. Me
D. Ca
You have 1 1/2 moles of 1 kg bottles of O2. What is the mass of O2 that you have? A. 9.033x10^23 kg B. 9.033x10^23 atoms C. 1.80x10^27 kg D. 1.806x10^24 moles
Answer:
b
Explanation:
trust
Answer:
B
Explanation:
Which best illustrates the way in which radiation? Giving brainy.
Answer:
I dont really understand your question. but maybe this might help.
https://quizlet.com/283377931/radiation-flash-cards/
Explanation:
How many moles of NaCl can be made from 16 moles of Na?
Prove this reaction is a redox reaction
3 Mg + 2 FeCl3 +2 Fe + 3 MgCl2
Your answer should include the half equations
Answer:
because Redox means two words:reduction and oxidation
reduction is when oxygen is taken from a substance while oxidation is the addition of oxygen to a substance..Magnesium displaces chlorine from iron(fe)because it is more reactive than iron
and iron gives chlorine to magnesium because it's less reactive.This is due to their position on reactivity series.
Explanation:
This is called displacement reaction where by A most reactive metal remove a substance from a less reactive metal and form up a salt
and in this case the salt formed in the reaction is 3MgCl
A beekeeper found that when stung by a bee, application of a little solution of sodium hydrogen carbonate helped to relieve the irritation of the affected area.Explain
Answer:
A bee sting releases an acid. When sodium hydrogen carbonate is applied, it neutralizes the acid since it's a base.
Explanation:
The sting of an bee contains formic acid. When an bee stings, it injects the acidic liquid into the skin, similar to ants. The effect of the sting can be neutralised by rubbing moist baking soda (sodium hydrogen carbonate) or calamine solution, which contains zinc carbonate.
Sodium hydrogen carbonate neutralizes the acid present in a bee's sting.
Explanation:
When we get stung by a bee, it releases a formic acid which irritates the affected area.And in order to relieve the irritation, we neutralize the formic acid by using sodium hydrogen carbonate which is basic in nature.Sodium hydrogen carbonate is basic in nature reacts with formic acid present in the sting to relieve the pain or irritation on the skin.The reaction between sodium hydrogen carbonate and formic acid occurs to give sodium formate, water, and carbon dioxide as a product[tex]NaHCO_3+HCOOH\rightarrow HCOONa+H_2O+CO_2[/tex]
Learn more about the acid-base reaction here:
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A student measures the volume of a rock, and then repeats the measurement two times. For the three measurements to be very precise, what must be true about them?
A. The measurements must be very close to the true volume of the rock.
B. The measurements must be very close to one another.
C. At least one of the measurements must be equal to the true volume of the rock.
D. The three measurements must be reported in whole numbers, not decimals.
Answer:
i think b
Explanation:
A student measures the volume of a rock and then repeats the measurement two times. For the three measurements to be very precise the measurements must be very close to one another for rock. Option B is correct.
What is precise?While measuring something is the measured value is close to each other then the result measurement is said to be precise and the phenomena are called precision.
In the measurement of rock, the measured values must be close to each other and do not vary much then only the measurement of students can be precise.
Therefore, Option B is correct, the measurements must be very close to one another for the rock student measures the volume of a rock and then repeat the measurement two times. For the three measurements to be very precise.
Learn more about precise, here:
https://brainly.com/question/1311561
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What happens to that atom of magnesium-24 if it GAINS a NEUTRON? *
Answer: If this atom loses one electron, it will become a cation with a 1+ charge
Explanation:
describe un modelo matemático para representar lo que sucede en cada una de las reacciones químicas (incluye toda la simbología que puedas) y clasifícalas según consideres de acuerdo con lo abordado en el tema.
1. El hidrógeno molecular reacciona con el oxígeno molecular y produce agua
2. El Óxido de calcio reacciona con el agua y produce hidróxido de calcio
3. El sulfuro de hierro (II) se produce cuando reacciona el azufre y el hierro en su forma atómica
4. El ácido sulfuroso se descompone por la acción de calor en dióxido de azufre gaseoso y agua
5. El carbonato de calcio se descompone por la acción de calor en oxido de calcio y dióxido de carbono gaseoso.
6. El magnesio reacciona con el ácido clorhídrico y produce dióxido de magnesio e hidrógeno gaseoso.
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Responder:
2H2 + O2 → 2H2O
CaO + H2O → Ca (OH) 2
Fe + S → FeS
H2SO3 → SO2 + H2O
CaCO3 → CaO + CO2
Explicación:
2H2 + O2 → 2H2O
2 moléculas de hidrógeno gaseoso reaccionan con oxigente para producir 2 moléculas de agua
CaO + H2O → Ca (OH) 2
El óxido de calcio reacciona con el agua para producir hidróxido de calcio.
Fe + S → FeS
El hierro reacciona con el azufre para producir sulfuro de hierro.
H2SO3 → SO2 + H2O
Por descomposición, el ácido sulfuroso se descompone para producir dióxido de azufre y agua.
CaCO3 → CaO + CO2
El carbonato de calcio se descompone para producir óxido de calcio y dióxido de carbono.
is acidity always bad?
Answer:
depends on what you're talking about. Stomach acid benefits us, some fruits like oranges, lemons, and pineapples are acidic.
Explanation:
Answer:
No.
Explanation:
In what type of reaction will an acid and a base react with each other?
oxidation-reduction
decomposition
combustion
neutralization
Answer:
answer is D
Explanation:
neutralization
Answer: Neutralization reaction
Explanation: lets look at it this way Since acids have pH below 7 ie pH 2 and bases have pH above 7 ie 13 so to "neutralize" the pH we add them together and thats how neutralization takes place !
1. How does erosion affect Earth's surface?
Answer:
By washing away the top soil and damages the echo system. It also destroys animal habitats.
particles in a gas can______.
I have peew weee brain help me pls
What is the molar mass of KAISiO4
(with work)
Answer: hmmmmmmmm ldk
Explanation:
5.23×7
estimate this product
Answer:
200
Explanation:
23 rounds down to 20
7 rounds up to 10
20 times 10 equals 200