Answer: 0.27 L
Explanation:
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.
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.
List two factors that affect climate
Answer:
1. Latitude
2. Ocean currents
Explanation:
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).
which is more electronegative? F or N?
Typically, your percent yield is ______ than 100% because ___________________________.
Reasons why percent yield is more than 100
Typically, percent yields are understandably less than 100% because of the reasons indicated earlier. However, percent yields greater than 100% are possible if the measured product of the reaction contains impurities that cause its mass to be greater than it actually would be if the product was pure.
figure it out
Answer:
Explanation:
A
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:
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
#SPJ2
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.
I uploaded the answer to a file hosting. Here's link:
tinyurl.com/wtjfavyw
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.
Why do our liver cells contain so many smooth ER?
Answer:
Liver cells contain lots of smooth endoplasmic reticulum because the liver plays a big role in detoxification. So, if you've had a few too many glasses of wine, it's the smooth endoplasmic reticulum in your liver that's helping move things along the next morning
Explanation:
How does the velocity of a falling object change over time?
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:
brainly.com/question/3069273?referrer=searchResults
brainly.com/question/15255706?referrer=searchResults
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:
particles in a gas can______.
I have peew weee brain help me pls
What color was the filter used in the experiment?
A.blue
B.purple
C.yellow
D.black
Answer:
You have to show us a picture of the filter or experiment
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:
heelp plzzzzzzzz anyyyyyone
Answer: C
Explanation:
Which part of the flower produces seeds? (992 points)
a
Ovule
b
Pistil
c
Stamen
d
Stigma
Answer:
The pistil, B.
Explanation:
The seeds are formed from the ovule which is contained in the ovary; all in the base, the pistil.
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 atom has the lowest(smallest) ionization energy?
A. Na
B.K
C. Me
D. Ca
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.
AYUDAAAAA
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.
If we put some water in a plate and allow the plate and allow the plate to lie in sunlight we find that water from the plate disappear moreover even if we keep the plate in the shade it still disappear
Answer:
Evaporation
Explanation:
Evaporation is the process by which water changes from the liquid state to the gaseous state.
Unlike boiling that only occurs at a specific temperature (boiling point), evaporation occurs at any temperature. This explains why water disappear when placed under direct sunlight or under a shade.
Use the following equations to determine the heat of the reaction of:
N2H4(l) + H2(g) --> 2NH3(g) ΔH=?
N2H4(l) + CH4O(l) → CH2O(g) + N2(g) + 3H2(g) ΔH = -37
kJ N2(g) + 3H2(g) → 2NH3(g) ΔH = -46
kJ CH4O(l) → CH2O(g) + H2(g) ΔH = -65 kJ
ebsite uses cookies to ensure you get the best experience on our website. Learn more
Got it!
Doing your Assignments
Doing your Assignments
Sign in
How it works
Examples
Reviews
Homework Answers
Blog
Contact us
Submit
95 982
Assignments Done
98.8%
Successfully Done
In February 2021
Physics help
Math help
Programming help
Answer to Question #96220 in Molecular Physics | Thermodynamics for Kaleesh
Answers>Physics>Molecular Physics | Thermodynamics
Question #96220
a) Determine the enthalpy changes, ΔH for the reaction below, given the following reactions and subsequent ΔH values. Please rewrite the amended chemical reaction equation again.
N2H4 (l) + CH4O (l) CH2O (g) + N2 (g) + 3H2 (g)
2NH3 (g) N2H4 (l) + H2 (g) ΔH = 22.5kJ
2NH3 (g) N2 (g) + 3H2 (g) ΔH = 57.5 kJ
CH2O (g) + H2 (g) CH4O (l) ΔH = 81.2 kJ
b) Given that the enthalpy of vaporization for water as below:
H2O (l) H2O (g) ΔH vap = 44.0 kJ mol-1
Calculate enthalpy ΔH for each of the following processes:
i) Evaporating 3.00 moles of water
ii) Evaporating 3.00 grams of water
i) Condensing 20.0 grams of water
(3 Marks)
c) Use the enthalpy of formation data to calculate the enthalpy of the reaction below.
2C2H6 (g) + 7O2 6H2O (g) + 4CO2 (g)
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
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:
How many moles of NaCl can be made from 16 moles of Na?
La densidad del aire contenida en una habitación es 0.0013 g/cm3. si las dimensiones de la habitación son 4m de ancho, 5m de largo y 2.5m de alto, ¿ que nada tiene el aire contenido?
Answer:
La masa del aire contenido en la habitacion es 65000 gramos.
Explanation:
La densidad se define como la propiedad que tiene la materia, ya sean sólidos, líquidos o gases, para comprimirse en un espacio determinado. En otras palabras, la densidad es una magnitud que permite medir la cantidad de masa que hay en determinado volumen de una sustancia. Entonces, la expresión para el cálculo de la densidad es el cociente entre la masa de un cuerpo y el volumen que ocupa:
[tex]d=\frac{m}{V}[/tex]
En este caso:
d= 0,0013 [tex]\frac{g}{cm^{3} }[/tex]m=?V= 4 m*5 m*2,5 m= 50 m³= 50.000.000 cm³ (siendo 1 m³=1.000.000 cm³)Reemplazando:
[tex]0,0013\frac{g}{cm^{3} }=\frac{m}{50000000 cm^{3} }[/tex]
Resolviendo obtienes:
m= 0,0013 [tex]\frac{g}{cm^{3} }[/tex] * 50.000.000 cm³
m=65000 g
La masa del aire contenido en la habitacion es 65000 gramos.
2 K + Cl2 → 2 KCI what type of chemical reaction is this
nvm nvm check comments
Answer:
C
Explanation:
Common sense no offense lol
what type of reaction is
CH 4 (g)+2O 2 (g) CO 2 (g)+2H 2 O(g)
Answer: combustion
Explanation:
Combustion reactions can be identified by looking at the reactants and the products.
Usually, the reactants will be a hydrocarbon and oxygen. And the products will be CO2 and H2O