The coefficients in a chemical equation represent the number of molecules or formula units of the reactants and products involved in the reaction and are crucial for ensuring the conservation of mass and for stoichiometric calculations.
Explanation:The coefficients in front of the reactants and products in a chemical reaction represent the relative numbers of molecules or formula units of those substances that participate in the reaction. When balancing chemical equations, these coefficients ensure that the equation adheres to the law of conservation of mass, meaning the number of atoms of each element is the same on both sides of the equation. For example, in the balanced equation for the combustion of methane, CH4 + 2O2 → CO2 + 2H2O, the coefficient '2' in front of O2 indicates that two molecules of oxygen are required for every molecule of methane (1CH4).
These coefficients also describe the mole ratio of reactants to products, which is essential for stoichiometric calculations in chemistry, enabling a quantitative assessment of the reaction. This quantification is necessary for applications such as determining the amounts of reactants needed or the amounts of products that will be formed in a given chemical reaction. Omitting a coefficient implies that the coefficient is '1', as in the molecule CO2 in the given equation.
What is the function of the swim bladder in a fish?
Answer:
The swim bladder is located in the body cavity and is derived from an outpocketing of the digestive tube. It contains gas (usually oxygen) and functions as an organ, enabling the fish to maintain its depth without floating upward or sinking.
Explanation:
Answer:
a and b bony and it helps them stay at a certain depth
Explanation:
375centimetercube of a gas has a pressure of 770mmHg.find it's volume if the pressure is reduced to 750mmHg
Answer: 385cm3
Explanation:
V1 = 375cm
P1 = 770mmHg
P2 = 750mmHg
V2 =?
P1V1 = P2V2
770x375 = 750xV2
V2 = (770x375) /750
V2 = 385cm3
Use the ideal gas law to calculate the pressure in atmospheres of 0.214 mol of Helium (He) at 61°C & occupying 2.53 L. You must show all of your work to earn credit. **Don't forget to convert your Celsius temperature to Kelvin. ** (4 points)
PLEASE HELP ASAP!!!!! WILL GIVE BRAINLIEST!!!!!
Pressure is 2.32 atm.
Explanation:
Ideal gas law is given as, PV = nRT
P represents pressure, V represents volume, T represents, temperature in Kelvin, R is nothing but the gas constant, its value is 0.08206 L atm mol⁻¹K⁻¹.
n represents the number of moles.
We have to convert temperature in Kelvin by adding 273 K to the given temperature in Celsius.
Temperature = 61°C + 273 K = 334 K
Plugin the values in the above equation as,
P = [tex]\frac{nRT}{V}[/tex]
= [tex]\frac{0.214 mol \times0.08206 L atm/mol K\times 334 K }{2.53L}[/tex]
= 2.32 atm
when you remove energy from particles they move slower and the matter
Answer:
moves closer together?
Calculate the percent ionization of a 0.447 M solution of nitrous acid
I hope this will help :)
Which should be kept away from heat sources? Check all that apply.
answer choices:
1 fire blanket
2 loose hair
3 chemicals marked
4 flammable clothing
5 water sources
Answer:
loose hair, flammable clothing, and all stored chemicals especially flammable liquids., should be kept away from heat.
A fire blanket is a highly flame-resistant blanket that can be used to extinguish a small fire or to wrap around a person in case of a fire and water helps put it out too.
Answer:
A.)fire blanket
Explanation:
are pigs really bacon or is bacon artificial
Answer:
it’s artificial
Explanation:
Answer: BACON
Explanation:
Calculate the molar mass of a gas if an 8.06×10(to the power of -2) gram sample of it occupies .0650 L at 547°C and 70.5 kPa
Answer:
M.Mass = 120 g/mol
Explanation:
Data Given:
Volume = V = 0.0650 L
Temperature = T = 547 °C = 820.15 K
Pressure = P = 70.5 kPa = 0.695 atm
Gas Constant = R = 0.082057 L.atm.mol⁻¹.K⁻¹
Formula Used:
Assuming that the gas is ideally then according to ideal gas equation,
P V = n R T
Solving for n,
n = P V / R T
Putting Values,
n = (0.695 atm × 0.0650 L) ÷ (0.082057 L.atm.mol⁻¹.K⁻¹ × 820.15 K)
n = 6.71 × 10⁻⁴ moles
Now, Knowing that,
Moles = Mass / M.Mass
Or,
M.Mass = Mass / Moles
Putting values,
M.Mass = 8.06 × 10⁻² g / 6.71 × 10⁻⁴ mol
M.Mass = 120 g/mol
If a disease caused one-fourth of the deer population to die, how would the rabbit population most likely be affected?
The rabbit population would get larger because of decreased competition with the deer population
The rabbit population would get smaller because of increased competition with the deer population
The rabbit population would get smaller because of decreased competition with the deer population
The rabbit population would get larger because of increased competition with the deer population
The correct answer is option c)The rabbit population would get smaller because of decreased competition with the deer population.
The likely impact of a disease causing one-fourth of the deer population to die on the rabbit population can be understood through the ecological dynamics within the food web. Deer and rabbits share the same trophic level as herbivores, both relying on producers like grass and plants for sustenance. If a disease significantly reduces the deer population, it would result in decreased competition for resources, particularly food, among herbivores.
In this scenario, option C is the most plausible: "The rabbit population would get smaller because of decreased competition with the deer population." With fewer deer consuming the same resources, such as plants and grass, the rabbits may experience a decline in competition for these food sources. This might lead to an apparent reduction in the rabbit population.
It's crucial to consider the intricate connections in the ecosystem. While decreased competition might initially benefit the rabbit population, other factors such as changes in predator-prey relationships or alterations in the vegetation structure could influence the long-term dynamics.
Therefore, due to decreased competition for resources with the declining deer population, the rabbit population is likely to get smaller (Option C).
The volume of helium in a blimp is 6.28 × 109 milliliters. The density of helium in the blimp is 0.1786 . Find the mass of the helium in the blimp.
Hey There!:
Density = mass / volume
Density of helium in the blimp = 0.1786 kg/m³
Volume of helium in the blimp = 6.28 x 10⁹ mL
converting the volume in m³ :
1 m³ -------------------------------- 1 x 10⁻⁶ m³
Volume( m³ ) -------------------- 6.28 x 10⁹
Volume ( m³ ) = ( 6.28 x 10⁹ ) x 1 / ( 1 x 10⁻⁶ )
Volume ( m³ ) = ( 6.28 x 10⁹ ) / ( 1 x 10⁻⁶ )
Volume ( m³ ) = 6280 m³
Therefore:
D = m / V
0.1786 = m / 6280
m = 0.1786 x 6280
m = 1121.608 g
converting in Kg :
1 kg ------------------ 1000 g
?? --------------------- 1121.608 g
mass = 1121.608 x 1 / 10000
mass = 1121.608 / 10000
mass = 1.12 x 10⁶ g
Hope that helps!
Final answer:
To find the mass of helium in the blimp, multiply the volume of helium ([tex]6.28 * 10^9[/tex] milliliters) by the density (0.1786 g/mL). This results in a mass of approximately [tex]1.121768 * 10^9[/tex] grams.
Explanation:
The question asks us to calculate the mass of the helium in the blimp given its volume and density. To find the mass, you need to use the formula: mass = volume × density.
In this case, the volume of helium is 6.28 × [tex]10^9[/tex] milliliters and the density of helium is 0.1786 grams per milliliter. So, you would calculate the mass as follows:
mass = 6.28 × [tex]10^9[/tex] mL × 0.1786 g/mL
mass = 1.121768 × [tex]10^9[/tex]grams
The mass of helium in the blimp is therefore approximately 1.121768 × [tex]10^9[/tex] grams.
30. a. How do the properties of metals differ from those
of both ionic and molecular compounds?
b. What specific property of metals accounts for their
unusual electrical conductivity?
Answer:
Explanation:
A. Metals are shiny, usually solid at room temperature, malleable, ductile, and highly conductive. In contrast, ionic compounds are brittle. Molecular compounds are often gases at room temperature.
b. Metals have very few valence electrons. Their outermost p-orbitals are empty. This allows their electrons (including those from their d-orbitals) to move freely between metal atoms. The movement of electrons is electricity, so this mobile "sea of electrons" is what causes metals' conductivity.
Which element in Period 5 is the most active metal? Fr H Rb Sr
Answer:
RB
Explanation:
Rubidium is the first element placed in period 5 and is the most active metal.
Answer:
The answer is: Rb
Hope this helps :) <3
Explanation:
One half of a balanced equation chemical equation is shown
3Mg(OH)2+2H3PO4
Answer:
the answe is A.)
Explanation:
hope this helps
your welcome
When a substance gains or loses energy, it’s _____ changes, or its _____ chafes. Theses two changes do ___happen at the time ; the temperature remains ___until the change of ____is complete.
Answer:
When a substance gains or loses energy, its temperature or state changes. These two changes do not happen with respect to time; the temperature remains the same until the change of state is complete.
Explanation:
This statement is about energy and change of the state of the matter. By gaining or losing energy, the physical state of the matter can change into one another. Melting, freezing, condensation, evaporation, sublimation, and deposition are the processes that support to change the physical state of the matter. Change in state and change in the matter do not happen at the same time. A substance gains or loses energy to reach a specific temperature and remains constant until the physical change of matter is completed.
Which organisms in a population produces more offspring than can survive this is called
Answer:
Biotic Potential
Explanation:
I googled it
Electromagnetic Spectrum Activity Worksheet
Instructions: Choose three activities in your everyday life that involve electromagnetic energy, and fill in the required information below.
Electromagnetic Energy Example One
Activity: microwaving food
Type of electromagnetic energy: Radiation
Just answer description of use for this one
Description of use:
Electromagnetic Energy Example Two
Activity:
Type of electromagnetic energy:
Description of use:
Electromagnetic Energy Example Three
Activity:
Type of electromagnetic energy:
Description of use:
2. Example of electromagnetic energy is X-Rays.
Type of electromagnetic energy is radiation/ gamma rays.
3. Example of electromagnetic energy is Radio.
Type of electromagnetic energy is Electromagnetic spectrum
Explanation:
Electromagnetic Energy Example Two Activity: X-RaysType of electromagnetic energy: Radiations / Gamma RaysElectromagnetic Energy Example Three Activity: Radio.Type of electromagnetic energy: Electromagnetic spectrumAnswer:
3 example
microwaves
airplanes
cars
Explanation:
microwaves uses heat waves
airplanes use radar waves
card uses the only visible waves, light,
then do some research mire about them, then choose a format that you want to do have a picture of the waves and the 3 lists and you will be about done! hopes it helps
N2+3H2-2NH3
calculate the number of grams of NH3 are formed when 3.0 mole of N2 is reacted with 6.7 moles of H2
102 grams of ammonia is formed when 3 moles of nitrogen and 6.7 moles of hydrogen reacts.
Explanation:
The equation given is of Haeber's process in which the nitrogen is limiting factor in the ammonia formation and hydrogen if in excess gets delimited.
We know that 1 mole of Nitrogen gives 2 moles of ammonia.
We have 3 moles of nitrogen here,
So, 6 moles of ammonia will be form
so from the formula
no of moles=mass/atomic mass
mass= no. of moles*atomic mass
= 6*17
= 102 grams of ammonia will be formed.
So, 6 moles or 102 grams of ammonia is formed when 3 mole of nitrogen and 6.7 mole of hydrogen reacts.
It is dangerous to combine alcohol and other drugs because _________________.
Answer:
It is dangerous to combine alcohol and other drugs because Combining them may cause a more intense effect than just taking one drug at a time and the effect can be unpredictable.
Explanation:
hope this helps
brainliest is appreciated... :}
Final answer:
Combining alcohol with other drugs is hazardous due to the increased risk of significant CNS depression, leading to serious consequences such as respiratory failure or death. Compounding tolerance and severe withdrawal symptoms highlight the dangers of physical dependence on these substances.
Explanation:
It is dangerous to combine alcohol and other drugs because such combinations can lead to additive or synergistic effects that intensify the impact on the central nervous system (CNS). For example, alcohol and barbiturates both depress the CNS, potentially resulting in enhanced sedative effects which may escalate to severe respiratory depression, coma, or death. Alcohol also impairs motor control, judgment, and cognitive functions, and when combined with other CNS depressants, these effects worsen, creating significant risk for injuries or fatal accidents.
Additionally, chronic alcohol consumption can lead to increased tolerance, meaning that higher doses are needed to achieve the same effect, which can be particularly dangerous when other substances are involved. Withdrawal symptoms from alcohol or other depressants can be severe and even life-threatening, requiring medical supervision during the detoxification process. This is indicative of the physical dependence that users of depressants could develop over time.
compared to an endocrine response a nerve response differs in that the nerve response generally.
the nerve response is generally faster
Explanation:
nerves travel throughout neurotransmitters which is a faster response, like a reflex, than the hormones in the endocrine system, like the growth hormone.
Which of the following set ups which converts centimeters to fit
Answer:
The fourth one down
Explanation:
It is the only setup in which the units of "cm" and "in" cancel correctly and give the desired units of "ft."
The second one down has the correct units but the wrong conversion factor for converting centimetres to inches.
The student is asked to use dimensional analysis for unit conversion within the metric system, such as converting meters to centimeters using a ratio or conversion factor.
Explanation:The question asks for the conversion of centimeters to fit, which appears to be a typo and should likely refer to converting measurements within the metric system. Specifically, the task involves applying dimensional analysis to convert lengths from one unit to another, such as meters to centimeters or vice versa.
Steps for Conversion Using Dimensional Analysis
Identify the provided measurement and its unit.
Determine the unit you need to convert to.
Set up a conversion factor, which is a ratio representing the relationship between two units.
Multiply the given measurement by the conversion factor to get the answer in the desired unit.
For example, to convert 1.5 meters to centimeters, you set up the proportion: 100 cm/1 m = x cm/1.5 m. By cross multiplying and solving the proportion, you find that x = 100 × 1.5 cm, which equals 150 cm.
Learn more about Dimensional Analysis here:https://brainly.com/question/30303546
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what fixes nitrogen in the atmosphere
Explanation:
It is the process of converting free nitrogen into nitrogenous compounds .
Let us study about it :
In nature there are certain plants called as leguminous plants .These plants have nitrogen fixing bacteria called as rhizobium in their root nodules .
This bacteria can convert free atmospheric nitrogen into ammonia .
Then this ammonia with the help of bacteria nitrosomonas and nitrobacter gets converted into nitrites and nitrates .
Then these nitrites and nitrates with the help of bacteria like pseudomonas gets converted back into free nitrogen ,
This cycle helps in enriching the soil and to maintain nitrogen percent constant in atmosphere ,
The biogeochemical cycle : for nitrogen is attached below
total water content in the earth remains constant. comment upon the following
Answer:
The total water content in the earth remains nearly constant.
Explanation:
The amount of water on earth is nearly same as the amount of water that was on earth in Mesozoic era.Plants and animals use water as a raw material in their growth, but that water is eventually returned to earth.When the UV light breaks the water molecules in higher atmosphere, some water is lost.But it is compensated by the water that enters the earth through meteors and comets.The water content is not constant but through the series of biochemical reactions,the water level is nearly the same.Answer:
the water is constant
:(
Explanation:
What happens to the biomass as energy decreases up the food pyramid?
Answer & Explanation:
Energy is transferred throughout the food chain as animals at lower trophic levels are consumed by those at higher trophic levels. ... Therefore, at each stage of the food chain, less energy and biomass is transferred between organisms than at the previous trophic level.
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A is a violent cyclonic storm that forms out at sea in the tropics near the . The tropical climate has air which provides the right conditions. This area experiences an in evaporation between June and November from the warm ocean waters which fuel this type of storm. This type of storm loses some of its strength and will weaken when it moves across .
this is sci
Answer:
Tropical Cyclone or Hurricane
Explanation:
Tropical Cyclone or Hurricane is a violent cyclonic storm that forms out at sea in the tropics near the . The tropical climate has air which provides the right conditions. This area experiences an in evaporation between June and November from the warm ocean waters which fuel this type of storm. This type of storm loses some of its strength and will weaken when it moves across .
Which is true with respect to the kinetic energy of a molecule?
O A.
it is the lowest at low temperatures
B.
it increases at low temperatures
C.
it is the same at all temperatures
D.it is the lowest at high temperatures
Answer:
A. it is the lowest at low temperatures
Explanation:
At low temperature the kinetic energy of a molecule is low. The kinetic energy is directly proportional to the temperature of the molecule. The kinetic energy of a molecule increases with the increase in the temperature that energize the molecules of a substance and makes them to move faster than before.
As the kinetic energy is proportional to temperature so it does not increase with decrease in the temperature (low temperature). The kinetic energy varies with the change in the temperature and it is not same at all temperature. The kinetic energy is highest at high temperature. Thus, option A is correct.
Choose the correct words.to complete the statements about career planning.
Throughout your job search, you’ll find that is closely related to the career of your choosing. It’s important to take the time to find out what to expect now, so you can start developing the you need to excel in that career.
HELPPPP PLEASE
Correct Question Format:
Throughout your job search, you’ll find that
A the economy
B education
C salary
is closely related to the career of your choosing. It’s important to take the time to find out what to expect now, so you can start developing the
A task
B communication
C skill
that you need to excel in that career.
Answer:
Throughout your job search, you’ll find that education is closely related to the career of your choosing. It’s important to take the time to find out what to expect now, so you can start developing the skill that you need to excel in that career.
Explanation:
At the time of attending our interview, we find that the question raised from an interviewer related to the choosing of the field and from our educational background. So, it clearly based on what we learn via our education and how we can get connected to the selected field but not based on our salary or an economy.
Similarly, it is essential to make a note about the requirement from the chosen field and have to prepare our skill accordingly. It means that required to develop the knowledge related to our selective field and should be presented in a connected way in front of an interviewer.
Throughout your job search, you'll find that which is closely related to the career of your choosing. It's important to take the time to find out what to expect now, so you can start developing the skill you need to excel in that career. Furthermore, volunteering in societal development will go a long way in giving you a stand among your peers. Finally try to connect to the people in your field to know the right person to guide you to succeed
What term means that the state of matter stays the same
Answer:
answer is solid
Explanation:
solid always is hard and can never change yet liquid and gas can move
The term 'phase' refers to the state of matter staying the same, and there are three main phases: solid, liquid, and gas. In a solid, the particles are in fixed positions and maintain a fixed volume and shape. The law of conservation of matter states that the total amount of matter remains constant during phase transitions.
The term that means the state of matter stays the same is phase. Matter exists in one of three main states, namely solid, liquid, and gas. In the solid phase, atoms or molecules do not have enough energy to move past each other and are in fixed positions with strong intermolecular forces; thus, they maintain a fixed volume and shape. The liquid phase has atoms or molecules that are constantly in contact yet have enough energy to move freely relative to one another, allowing the liquid to take the shape of its container while maintaining a definite volume. The gas phase is characterized by particles that are separated by relatively large distances and that fill the volume of their container.
In any closed system, the law of conservation of matter dictates that no detectable change in the total amount of matter occurs during the transition from one phase to another. Thus, when matter undergoes a phase change, its state may alter, but the total quantity of matter remains constant within a given system.
How many miles of silver nitrate do 2.888 x 10^15 formula units equal?
Answer: 4.8x10^-9 mol
Explanation:
1mole of Silver nitrate contains 6.02x10^23 molecules
Therefore, Xmol of silver nitrate will contain 2.888x10^15 molecules i.e Xmol of silver = 2.888x10^15/6.02x10^23 = 4.8x10^-9 mol
Which of the following is the first stage of the photo-independent reaction?
carbon cycle
carbon fixation
carbon sink
carbon source
Answer:
i believe the answer is b.) carbon fixation
Name two physical properties that characterize matter.
Answer:
Physical properties are used to observe and describe matter. Physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity, and many others.
Explanation:
Answer:
Matter is anything that has mass and occupies a space. Matter has 2 properties physical properties and chemical properties. And 2 physical properties include mass and shape (solid, liquid and gas).
Other physical properties of molecular matter include:
Volume
Color
Odor
Luster
Hardness
Melting Point
Freezing Point
Boiling Point
Density
Malleability
Ductility
Conductivity