Answer:
H3PO4 + H2O ↔ [tex]H^{+}[/tex] + [tex]H2PO4^{-}[/tex]
Explanation:
HNO3 → NO2 + H2O + O2
H2SO4 → SO3 + H2O + O2
If 500 mL expandable cylinder with a pressure of 500
mmHg was filled until the volume was 1.2 atm. What is the
new volume?
Answer:
0.274 L
Explanation:
Applying Boyle's law,
PV = P'V'................. Equation 1
Where P = Initial pressure, V = Initial volume, P' = Final pressure, V' = Final volume.
make V' the subject of the equation,
V' = PV/P'............. Equation 2
From the question,
Given: P = 500 mm Hg, V = 500 mL = 0.5 L, P' = 1.2 atm = 912 mm Hg
Substitute these values into equation 2
V' = (0.5×500)/912
V' = 0.274 L
Hence the new volume is 0.274 L
Beryllium hydrogen carbonate is more than 3% hydrogen by mass.
True
False
En una muestra de jugo de limón la concentración de H1 es de 3.8x10 a la 4 potencia ¿ cual es su PH considerando que 378= 0.58
Answer:
pH = 3.42
Explanation:
Para calcular el pH necesitamos usar la siguiente expresión:
pH = -log[H⁺]
Por tanto, solo necesitamos reemplazar el valor dado de [H⁺] en la expresión anterior y se determina su pH:
pH = -log(3.8x10⁻⁴)
pH = 3.42Por tanto el pH de la muestra de jugo de limón es 3.42
What makes lava flow in the manner that it does
Answer:
Lava flows are streams of molten rock that pour or ooze from an erupting vent. Lava is erupted during either nonexplosive activity or explosive lava fountains. ... But when basalt lava flows are confined within a channel or lava tube on a steep slope, the main body of the flow can reach velocities >30 km/h (19 mph).
Explanation:
How many moles of NaOH
would you have in a
sample that weighed 10g?
Answer: There are 0.25 moles of NaOH in a sample that weighed 10g.
Explanation:
Given: Mass of NaOH = 10 g
Molar mass of NaOH is 40 g/mol.
Number of moles is the mass of substance divided by its molar mass.
Therefore, moles of NaOH are calculated as follows.
[tex]No. of moles = \frac{mass}{molarmass}\\= \frac{10g}{40 g/mol}\\= 0.25 mol[/tex]
Thus, we can conclude that there are 0.25 moles of NaOH in a sample that weighed 10g.
need these 2 answered asap pls
Answer:
im not a brain wiz but i think 20
Explanation:
Hey fill in the missing temperatures in this chart zoom in if you can’t see it take a screenshot or sum : Please help me will mark brainliest and be geniune .
PLZ HELP!!!!!! IN YOUR OWN WORDS PLZ! :D
Imagine your cell phone rings. Describe how the sound gets transmitted from your phone to your ear, and then, from your ear to your brain. In your response, be sure to mention the type of wave that a sound wave is, the medium the sound is transmitted through before it gets to your ear, and what happens in your ear once the sound reaches it.
Answer:
SOUND WAVE (carried by thin metal inside the phone) ⇒ELECTRICAL ENERGY (over the wire) ⇒SOUND WAVE (that is heard by someone on the side of the phone)
Explanation:
What is a sound wave?A wave that is comprised of compression and refraction, by which sound is propagated in an elastic medium such as air.
How does sound get transmitted from phone to ear?
The sound waves are carried to a thin metal disk inside the phone, known as the diaphragm, and are converted into electrical energy. The electrical energy travels over wires to another phone and is converted from electrical energy to sound waves again which can be heard by the one on the other end of the phone.
How does sound get transmitted from ear to brain and what happens when sound reaches the ear?Sound waves enter the outer ear and travel through a small passageway (ear canal), which leads to the eardrum.The eardrum vibrates from the coming sound waves and sends these vibrations to three tiny bones in the middle ear. These bones are known as the malleus, incus, and stapes.The bones present in the middle ear amplify the sound vibrations and send these vibrations to the cochlea (the snail-shaped structure that is filled with fluid present in the inner ear). An elastic separation runs from the beginning to the edge of the cochlea, splitting it into upper and lower parts. This separation is called the basilar membrane as it serves as the base on which key hearing structures sit.Once the vibrations result in the fluid inside the cochlea rippling, a traveling wave appears along the basilar membrane. Hair cells (sensory cells) sitting on top of the basilar membrane ride the wave. Hair cells near the broad end of the cochlea detect higher-pitched sounds. Those closer to the center detect lower-pitched sounds, such as a large dog barking.As the hair cells move up and down, microscopic hair-like projections (known as stereocilia) that perch on the peak of the hair cells crash against an overlying structure and bend down. Bending results in pore-like channels, which are at the tips of the stereocilia, opening up. Then chemicals rush into the cells, producing an electrical signal.The auditory nerve carries this electrical signal to the brain, which in return it into a sound that we recognize and understand.In this way, sound reaches our ears.
learn more about sound waves here:
https://brainly.in/question/100845
#SPJ2
Which procedure is an attempt to correct a genetic disorder by replacing a mutated gene with a normal allele?
O selective breeding
• cloning
O artificial selection
•
gene therapy
gene therapy
Explanation:
Gene therapy, also called gene transfer therapy, the introduction of a normal gene into an individual's order to repair a mutation that causes a genetic disease.
Answer:
C artificial selection
Explanation:
Brainly please
How many moles of Co are needed to produce nine moles of CO2
Answer:
guizzes
Explanation:
guizlet
Answer:
2. 8 moles of carbon dioxide can be produced from 12.5 moles of oxygen. 1 mole of octane can be produced from 8 moles of carbon dioxide gas.
Explanation:
hope this helps :)
Steel wool turns from a gray color to a reddish color after it gets wet and then sits on a counter. Is this a sign of a chemical or physical change? PLEASE ANSWER ASAP!
Answer: Steel wool turns from a gray color to a reddish color after it gets wet and then sits on a counter is a sign of chemical change.
Explanation:
A change that brings change in chemical composition of a substance is called a chemical change.
For example, Steel wool turns from a gray color to a reddish color after it gets wet and then sits on a counter is a chemical change.
This is because steel wool is mostly made up of iron and when iron becomes wet then in the presence of air it gets oxidized and therefore, it gets corroded.
This corrosion appears as reddish color of steel wool and it represents a chemical change has occurred in the steel wool.
Thus, we can conclude that steel wool turns from a gray color to a reddish color after it gets wet and then sits on a counter is a sign of chemical change.
What is important in order for a radioisotope to provide accurate dating
results?
O A. The half-life should be similar to the age of the object.
B. The radioisotope cannot be part of a decay chain.
O C. The isotope must undergo transmutation.
O D. The item being dated must be very old.
The most important factor to be considered in order for a radioisotope to provide accurate dating simply is:
The half-life should be similar to the age of the object.
The correct answer choice is option a.
Why half-life should be similar to the age of the object in determining accurate dating of a radioisotope.Half-life of radioisotope helps in determining dating accurately simply because it helps to predict the amount of radioactive substance remaining after a given period of time.
In conclusion, it can be perfectly deduced from the explanation given above that the half-life of a radioisotope usually, frequently and most of the time helps to determine the rate at which these substances decay.
Read more on radioisotope:
https://brainly.com/question/18640165
#SPJ1
How much heat, in kilojoules, is needed to raise the temperature of 236 g of silver from 8.5oC to 34.9 °C? (cAg = 0.24 J/g°C)
Answer:
1.49kJ
Explanation:
Using the formula as follows;
Q = m × c × ∆T
Where;
Q = amount of heat (joules)
m = mass (g)
c = specific heat of silver (J/g°C)
∆T = change in temperature (°C)
According to the information given in this question;
mass of Silver (Ag) = 236g
c of Ag = 0.24 J/g°C
initial temperature (T1) = 8.5°C
final temperature (T2) = 34.9°C
∆T = T2 - T1 = 34.9 - 8.5 = 26.4°C
Using Q = m × c × ∆T
Q = 236 × 0.24 × 26.4
Q = 1,495.3 Joules
Amount of heat needed to raise the temperature of Silver (Q) in kilojoules is 1495.3/1000 = 1.4953
Q = 1.49kJ
Percent yield is the quantity of product actually produced compared to the quantity _______.
a. the limiting reactant
b. volatile materials
c. of expected product
d. the excess reactant
Answer:
Of expected product
Explanation:
Percent yield is the quantity of product actually produced compared to the quantity of expected product and the correct option is option C.
What is the percent yield?Percent yield is the ratio of actual yield divided by theoretical yield multiplied by 100. It gives information regarding the percentage of products formed in the reaction.
Percentage yield = Actual yield / Theoretical yield × 100
Percent yield is very important in the manufacture of products.
Percent yields are understandably less than 100%, 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.
Theoretical yield is the expected amount of products formed in the reaction.
Therefore, percent yield is the quantity of product actually produced compared to the quantity of expected product and the correct option is option C.
Learn more about Percent yield, here:
https://brainly.com/question/2506978
#SPJ3
Where on the periodic table are you most likely to find elements that do not react with other elements A) group 1 B) group 2 C) group 17 D) group 18
Answer:
d) group 18
Explanation:
Group 18 on the periodic table consists of noble gasses, which do not chemically interact with other elements.
The lower temperature of the air is there more water vapor can hold True or false. Help!!!!!
Answer:
true
Explanation:
Why is it appropriate to describe the Sun and its orbiting celestial bodies as a system?
As the bodies present in the gravitational force of sun, so it is appropriate to describe the sun and its celestial bodies as system.
What are celestial bodied?Celestial bodies are those objects which are present in the space not in the land.
In the space all the planets are present in their orbitals under the gravitational force of the sun and do the motion around the sun, because of that force planets are present in the orderly arrangement. Because of the revolution of the earth around the sun, seasons will change on the earth.
Hence, it is appropriate to describe the sun and its celestial bodies as system.
To know more about celestial bodies, visit the below link:
https://brainly.com/question/3735999
if you were givin 2.50 moles of.sodium bromide, how many grams of salt do you have
Answer: 257.23
Explanation:
Select the correct answer.
A circuit is used in which process?
OA. electricity
OB. magnetism
OC. velocity
OD. gravity
Answer:
electricity
Explanation:
A circuit is used in every electrical and electronics operation.
Gold can undergo transmutation. Superscript 185 Subscript 79 Baseline Upper A u right arrow Superscript 181 Subscript 77 Baseline Upper I r + Superscript 4 Subscript 2 Baseline Upper H e This type of nuclear decay is called .
Answer:
Alpha Decay
Explanation:
Answer:
The answer for this would be Alpha Decay
Explanation:
If this is a late answer I apologize but I hope others may find this helpful :)
Calculate the pOH for a solution with a pH of 12.34. Is the Solution acidic or basic?
Answer:
1.66 basic
Explanation:
what will litmus paper turn when it reacts with sodium nitrate?
The kinetic molecule theory assumes that the particles of an ideal gas
Explanation:
It is assumed that the particles of an ideal gas have no such attractive forces. The motion of each particle is completely independent of the motion of all other particles. The average kinetic energy of gas particles is dependent upon the temperature of the gas.
What is the number of first and last vertical column?
Answer:
Modern periodic table has eighteen (18) vertical columns. These are called groups
A student was in the lab testing the conductivity of different solutions. Three of the solutions were NaNO3, Ca(NO3)2, and Al(NO3)3. Which of the solutions should be the best conductor of electricity?
Answer:
Aluminium nitrate
Explanation:
[tex]Al(NO _{3}) _{3}[/tex]
This is because there are many conducting nitrate ions compared to the other electrolytes
What does renewable energy resource mean?
Answer:
Renewable energy is energy from sources that are naturally replenishing but flow-limited; renewable resources are virtually inexhaustible in duration but limited in the amount of energy that is available per unit of time. The major types of renewable energy sources are. Biomass. Wood and wood waste.
Explanation:
Answer:
A renewable resource is one that can be used repeatedly and does not run out because it is naturally replaced.
Explanation:
What do you measure in an experiment to determine reaction rate?
Group of answer choices
A. Amount of reactants
B. Amount of products
C. Temperature
D. Time
Why are substances such as coal and gasoline used as fuel sources?
A.They have high kinetic energy, which can be converted into electrical or mechanical
energy
B.They have large amounts of energy stored in the chemical bonds which can be
converted into kinetic energy when combusted
C.They are able to easily make endothermic reactions, which can be harnessed and
converted into mechanical energy
D. None of the above statements are true
Answer:
A.They have high kinetic energy, which can be converted into electrical or mechanical energy
Explanation:
The kinetic energy of the fast-moving water turns turbines, which drive generators that produce electricity. The energy in fossil fuels (coal, oil, gas) is Chemical Potential Energy.
Explain what fertilisers are used for.
What are the consequences of NOT wearing a mask?