No. of atoms included in 1245 mg is 0.127 *[tex]10^{23}[/tex] atoms.
Answer:
Explanation:
We know that we can determine the number of atoms in any given amount of sample by dividing the given weight to the atomic mass of the particular sample and then multiplying it with avagadro's number.
So, here the atomic mass of cobalt is 58.9 amu.
Thus,
No.of atoms = [tex]\frac{1245 mg}{58.9g} * 6.023 * 10^{23}[/tex]
No. of atoms included in 1245 mg is 0.127 *[tex]10^{23}[/tex] atoms.
As we know that atomic mass of any element contains avagadro's number of atoms. So in order to find the number of atoms in a given weight of sample, we have to follow the above procedure.
No. of atoms included in 1245 mg is 0.127 *[tex]10^{23}[/tex] atoms.
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.
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
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
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.
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.
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.
Calculate the percent ionization of a 0.447 M solution of nitrous acid
I hope this will help :)
Can someone help? Find: Number of H atoms in 6.047 x 10^23 molecules of H2.
1.2 x [tex]10^{24}[/tex] number of atoms in [tex]H_{2}[/tex] molecule
Explanation:
As we can see, one molecule of hydrogen is existing as two hydrogen atoms bond together. So, as we know that the number of molecules in one mole of the hydrogen atom is the Avogadro's numberHere, there are two atoms in every molecule of hydrogen. Hence, the number of atoms in every molecule of hydrogen would be calculated by multiplying 2 with the Avogadro's number which gives the answer given above. Hence, 1.2 x [tex]10^{24}[/tex] the number of atoms in every hydrogen molecule.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:
A Compound is found to contain 37.47% carbon , 12.61% hydrogen , and 49.92 % oxygen by mass. What is the empirical formula for this compound ?
Answer:
CH₄O
Explanation:
Given parameters:
Mass percentage of:
Carbon = 37.47%
Hydrogen = 12.61%
Oxygen = 49.92%
Unknown:
Empirical formula of the compound = ?
Solution:
The empirical formula of a compound is the simplest ratio by which the atoms in a compound combines.
The actual formula of a compound is called the molecular formula.
To solve for the empirical formula, we follow this process;
Elements Carbon Hydrogen Oxygen
Mass
Percentage 37.47 12.61 49.92
Molar
mass 12 1 16
Number
of moles 37.47/12 12.61/1 49.92/16
3.12 12.61 3.12
Divide by
the smallest 3.12/3.12 12.61/3.12 3.12/3.12
1 4 1
Empirical formula = CH₄O
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
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:
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
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.
Where would you look for igneous rocks? Why?
Answer:
Where Igneous Rocks Are Found. The deep seafloor (aka... the oceanic mantle) is made almost entirely of basaltic rocks, with peridotite underneath in the mantle.
Explanation: im pretty sure thats right at least
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
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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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
3.01 x 10^23 atoms of rubidium
Answer:
0,5 mole
Explanation:
Because n = N/Nₐ, n(Rb) = 0,5 mole
One mole of every element contains 6,022045 × 10²³ atoms, so 3,01 × 10²³ atoms of rubidium is half mole.
To solve this we must be knowing each and every concept related to mole. Therefore, 3.01 x 0²³ atoms of rubidium contains 0.499moles.
What is mole?A mole is merely a measuring unit. In reality, it is one of its International System of Units' seven foundation units. When current units are insufficient, new units are created.
Chemical reactions frequently occur at levels where employing grams would be inappropriate, but using absolute quantities of atoms/molecules/ions would also be misleading.
For all practical reasons, one mole of a substance in grams is nearly equal to 1 molecule for the compound per daltons.
Mathematically,
mole =given number of atoms ÷ 6.022×10²³(Avogadro number)
given number of atoms=3.01 x 0²³
substituting all the given values in the above equation, we get
mole =3.01 x 0²³ ÷ 6.022×10²³(Avogadro number)
=0.499moles
Therefore, 3.01 x 0²³ atoms of rubidium contains 0.499moles.
To know more about mole, here:
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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 .
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
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
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:
are pigs really bacon or is bacon artificial
Answer:
it’s artificial
Explanation:
Answer: BACON
Explanation:
IF WERE ASAP!!!! 10 POINTS Wrasse fish eat parasites off the body of sea bass. What type of symbiotic relationship is this? A parasitism B commensalism C mutualism
Answer:
Mutualism
Explanation:
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
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.
i love your pfp
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 organisms in a population produces more offspring than can survive this is called
Answer:
Biotic Potential
Explanation:
I googled it
when you remove energy from particles they move slower and the matter
Answer:
moves closer together?