The grams of nitrogen gas inhaled are 0.0322816 moles.
What is mass?Mass is the quantity of matter of a physical body.
No. of molecule inhaled by a person is [tex]9. 72 \times 10^2^1[/tex]
Nitrogen is a diatomic molecule, so it will contain 2 atoms.
Number of nitrogen atoms
[tex]9. 72 \times 10^2^1 \times 2 = 19.44 \times 10^2^1[/tex]
1 mole contain = [tex]6.022 \times 10^2^3[/tex]
So, number of moles of nitrogen
[tex]\dfrac{9. 72 \times 10^2^1}{6.022 \times 10^2^3} = 3.22816 \times 10^-^2\\\\= 0.0322816 \;moles[/tex]
Thus, the grams of nitrogen gas inhaled are 0.0322816 moles.
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When an acid and alkali react to form water and salt it is called:.
The reaction of acids with alkalis or bases forming salts is called neutralization reaction. Neutralization reaction remove the acidity or basicity of the substance.
What is neutralization?There are various kinds of reaction namely substitution reactions, displacement reactions, combination reaction, neutralization reactions, oxidation etc.
Neutralization reactions are those where, an acid neutralizes a base or vice versa. The product obtained will be neutral thus having no acidity or basicity as the name suggests.
For instance when HCl reacts with the base NaOH, the salt NaCl is formed which is neutral thus having the pH value of 7. Similarly, Acetic acid and KOH reacts together to form potassium salt of acetic acid or potassium acetate. These are all neutralization reactions.
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These healthy fats are needed by your body that have 1 or more double bond
a). triglycerides
b). saturated
c). polysaccharides
d). unsaturated
What determines whether or not a substance will dissolve?.
For the reaction of sodium bromide with chlorine gas
The reaction of sodium bromide with chlorine gas is Cl₂(aq) + 2Na + 2Br? 2Na + 2Cl⁻ + Br²(aq).
What is sodium bromide?Sodium bromide is an inorganic compound, white, crystalline with high melting point.
The reaction between halogens is redox reaction
Oxidation – 2Br⁻ ? Br₂ + 2e⁻ loss of electron.
Reduction – Cl₂ + 2e⁻ ? 2Cl⁻ gains of electron.
Thus, the correct option is Cl₂(aq) + 2Na + 2Br? 2Na + 2Cl⁻ + Br²(aq).
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A tank is full of water. Find the work w required to pump the water out of the spout. (use 9. 8 for g. ) w = n a = 4 b = 4 c = 12 d = 3
The work w required to pump the water out of the spout will be 705600 joules.
What is work done?Work done is defined as the product of applied force and the distance through which the body is displaced on which the force is applied.
Work against gravity is done on a thin layer of liquid with a width of y. The vertex of the trough serves as the center of our coordinate system.
It is obvious that the cross-section of the triangle has length y at a height y. A thin layer at height y is a rectangular box with a volume of 8 y , and lifting it requires a force equal to;
[tex]\rm F= \rho gV \\\\\rm F= 9.8 \times 10000 \times 8y \triangle y \\\\[/tex]
The work on the layer is;
[tex]\rm W= 78400 y \triangle y [4-y]\\\\\ W= \int\limits^3_0 {x} \, dx \\\\\ W= \int\limits^3_0{78400y[4-y]} \, dx \\\\\ W=705600 \ Joule.[/tex]
Hence, the work w required to pump the water out of the spout will be 705600 joule.
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29. Molecule H-F has a polar covalent bond because: (1 point)
a. lonisation energy of fluorine is greater than Hydrogen.
b. Hydrogen is a smaller Atom.
c. Electronegativity of Fluorine is greater than Hydrogen.
d. Fluorine has a greater tendency to pull the shared pair of electrons towards itself
Answer:
D
Explanation:
This question is a little strange. C and D are very similar, but I would pick D.
Fluorine actually has the highest electronegativity of all the elements. This allows it to pull more electrons towards itself. Since electrons have a negative charge, this causes the fluorine end of the molecule to be more negative while the hydrogen is left striped of electrons and has it positively charged necleus exposed. This means that one end of the molecule is positive while the other is negative, which makes this molecule polar. The only reason I would pick D over C is that D addresses the second part of the question about the covalent bond. A covalent bond is simply when two atoms share electrons.
Let me know if this was right and I hope it helps.
What is the change in enthalpy when 11. 0 g of liquid mercury is heated by 15°c?
Enthalpy change is the difference between energy used and energy gained. The change in enthalpy of the liquid mercury is 0.0231 kJ.
What is the enthalpy change?Enthalpy change is the difference between the energy used to break chemical bonds and the energy gained by the products formed in a chemical reaction.
The enthalpy change is given by,
[tex]\rm \Delta H_{rxn} = \rm q_{rxn}[/tex]
and,
[tex]\rm q = mc\Delta T[/tex]
Given,
Mass of the liquid mercury (m) = 11.0 gm
The specific heat of mercury (c) = 0.14 J per g per degree Celsius
Temperature change = 15 degrees Celsius
Enthalpy change is calculated as:
[tex]\begin{aligned} \rm q &= \rm mc\Delta T\\\\&= 11 \times 0.14 \times 15\\\\&= 23.1 \;\rm J\end{aligned}[/tex]
Therefore, 0.0231 kJ is the change in enthalpy.
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1. The concentration of ammonium sulphate in soil can be determined by dissolving the salt and after filtering, adding acidified barium chloride to the solution. The insoluble barium sulphate (BaSO4) that forms is separated, dried and then weighed. In an experiment to determine the concentration of ammonium sulphate in soil, it was found that 1 kg of soil yielded 0.016 g of BaSO4. 1.) calculate the moles of BaSO4 in 0.116g
The number of mole present in 0.116 grams of barium sulphate, BaSO₄ is 0.0005 mole
Description of moleThe mole of a substance is related to it's mass and molar mass according to the following equation:
Mole = mass / molar mass
How to determine the mole of BaSO₄From the question given above, the following data were obtained:
Mass of BaSO₄ = 0.116 g gMolar mass of BaSO₄ = 137 + 32 + (16×4) = 233 g/mol Mole of BaSO₄ =?Mole = mass / molar mass
Mole of BaSO₄ = 0.116 / 233
Mole of BaSO₄ = 0.0005 mole
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PLEASE HELP EATHER ANSWER ONE OR ALL OR HOW MANY YOU WANT
Describe the scientific method/process and list its steps.
Define speed and velocity
List the three Laws of Isaac Newton and provide an example for each law.
List the two types of waves.
What is electricity?
Discuss what is electromagnetism.
Explanation:
Speed is the rate of an object moving along a path, whereas velocity is the direction of motion
Electricity is the flow of electric charge
Answer:
Describe the scientific method/process and list its steps:
The scientific method consists of six steps:
1. Define purpose
2. Construct hypothesis
3. Test the hypothesis and collect data
4. Analyze data
5. Draw conclusion
6. Communicate results
But what is it?
The scientific method is a process with the help of which scientists try to investigate, verify, or construct an accurate and reliable version of any natural phenomena.
-
Define speed and velocity:
Speed is the quantitative measure of how quickly something is moving. Velocity defines the direction of the movement of the body or the object. Speed is primarily a scalar quantity. Velocity is essentially a vector quantity. It is the rate of change of distance.
List the three Laws of Isaac Newton and provide an example for each law.
1 - An object will remain at rest or in uniform motion in a straight line unless acted upon by an external force. It may be seen as a statement about inertia, that objects will remain in their state of motion unless a force acts to change the motion.
(example: A coin put on top of a paper on the table will stay in place when the paper is pulled.)
2 - That force is equal to the change in momentum per change in time. For a constant mass, force equals mass times acceleration, i.e. F = m*a.
(example: A truck which carries less mass will have a bigger acceleration that a truck which carries more mass)
3 - States that for every action there is an equal and opposite reaction.
(example: Our hand feels pain when we hit the table because the table gives force as a reaction to our hand)
List the two types of waves.
1. Mechanical Wave --> A mechanical wave is a wave that is an oscillation of matter and is responsible for the transfer of energy through a medium.
2. Electromagnetic Wave --> Electromagnetic waves are created by a fusion of electric and magnetic fields. The light you see, the colours around you are visible because of electromagnetic waves.
-
What is electricity?
Electricity is the flow of electrical power or charge.
-
Discuss what is electromagnetism.
Electromagnetism is a branch of physics that is about the electromagnetic force that is between electrically charged particles. Electromagnetism is the basic reason why the electrons are bound to the nucleus and responsible for the complete structure of the nucleus!
ASAP PLEASEE
While many elements exist as a single atom, a few exist as molecules. Which 7 elements are diatomic?
Seven diatomic elements are H₂, Cl₂, N₂, F₂, Br₂, I₂ and O₂.
Which are diatomic molecules?Diatomic molecules are those molecules in which two atoms of same elements are present, and they are combined to attain the stability.
The seven diatomic molecules which are exist in the chemistry are:
Hydrogen gas (H₂)Chlorine gas (Cl₂)Nitrogen gas (N₂)Fluorine gas (F₂)Bromine gas (Br₂)Iodine gas (I₂)Oxygen gas (O₂)Hence H₂, Cl₂, N₂, F₂, Br₂, I₂ and O₂ are 7 diatomic molecules.
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Ethylene, a gas found in nature, is commonly used to ripen bananas and other fruits. which compound is ethylene? 2 c h 2 are single bonded to each other, and both are single bonded to the same o. a skeletal model with a chain beginning with o h, then line segments going up, down, up and ending at another o h. 2 carbons are double-bonded to each other; the pair are single bonded to h above left, above right, below right, and below left. two carbons are triple bonded to each other; each is single bonded to h to the outside.
Ethylene is a compound in which two carbons are double-bonded to each other and bonded to 2 hydrogen atoms.
What is the chemical formula of ethylene?Ethylene has a chemical formula [tex]C_2H_4[/tex].
Thus, the 2 carbon atoms are bonded to one another by a double bond. Each of the carbon atoms then bonds with 2 hydrogen atoms to complete their octet state.
The structure is as below:
[tex]H_2[/tex]-C=C-[tex]H_2[/tex]
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Answer:
its a
Explanation:
trust
Set up a ripple tank with a wave generator on one side.
remove the boundary. place a flat piece of plastic or glass on the bottom of one side of the tank so that it is completely
submerged. what happens to the waves when they pass from the deeper water to the shallower water?
when the waves pass from the deeper water to the shallower water its speed will decrease.
What is refraction of wave?Refraction of wave is the change in direction of a wave passing from one medium to another caused by its change in speed.
For example, waves travel faster in deep water than in shallower water.
Thus, we can conclude that when the waves pass from the deeper water to the shallower water its speed will decrease.
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If an atom is neutral, then the number of electrons is equal to the number of _______________________
A 16. 0g sample of iron was heated from 16oc to 35oc, it absorbed 246. 4j of energy as heat. What is the specific heat of this piece of iron?
Answer: 0.81
Explanation:
If you have 20 grams of carbon-14 and it goes through 2 half lives, how much carbon-14 is left?
Answer:
it would be 25% sorry if I'm wrong
Question 4 of 33
which of these is a pitfall associated with using oil?
a. acid mine drainage can pollute waterways.
b. shale rock deposits can release gas.
c. spilled oil can harm wildlife.
o d. fracking can cause earthquakes.
submit
Oils like petrol and diesel are fossil fuels. Using oil can be at a disadvantage as spilled oil can harm wildlife and the environment. Thus, option c is correct.
Why is oil harmful?Oil is a nonrenewable fossil fuel that can get depleted when used in excess. It is extracted by many processes through mining underwater and in fields. During these extraction processes, oil spills can occur.
Oil spills directly affect the environment and cause pollution of water and soil. This leakage affects the flora and the fauna that lives in the area and causes their death due to lack of oxygen.
Therefore, option c. oil spills cause harm to wildlife.
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How much energy is needed to change the temperature of 50g of water by 15°C?
Q=mcΔt
Q=50 x 4.186 x 15
Q = 3139.5 J
A voltaic cell differs from an electrolytic cell in that in a voltaic cell.
Answer:
they are opposite in function
Explanation:
voltaic cell converts chemical energy to electrical energy through redox reactions i.e reduction-oxidation reaction while the electrolytic cell converts chemical energy to electrical energy.
It is urgent !!!!
what is the specific heat of a substance that took 5000 j to change 20 k and has a mass or 3 kg?
Answer:
h=5000j
change in temperature=20k
m=3kg
using C=H÷M×Change in temperature
C=5000÷3×20
C=5000÷60
C=83.33jkg-1k-1
The volume of a gas is 605 liters at 27.0°C. The new temperature is -3.0°C. What is the new volume? (Remember to convert temperatures to the Kelvin scale.) L
The volume of a gas is 605 liters at 27.0°C and the new temperature is -3.0°C, so the resultant volume of the sample is 544.53L.
What is the relation between volume and temperature?Relation between the volume and temperature of the sample of gas is represented by the ideal gas equation PV = nRT, and for the question required equation is:
V₁/T₁ = V₂/T₂, where
V₁ & T₁ are the initial volume and temperature of the gas.
V₂ & T₂ are the final volume and temperature of the gas.
On putting values from the question on the above equation and by converting temperature into Kelvin, we get
V₂ = (605)(270.15) / (300.15) = 544.53 L
Hence required volume of the sample is 544.53L.
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Calculate the value of ka for acetylsalicylic acid
The value of Ka for acetylsalicylic acid will be calculated as Ka=(x+a)²/x.
What is Ka?Ka is known by the name of acid dissociation constant and for weak acid HA at equilibrium Ka will be calculated as:
Ka = [H⁺][A⁻] / [HA]
Chemical equation with ICE table for the acetylsalicylic acid will be shown as:
C₉H₈O₄(aq) + H₂O(l) ⇄ C₉H₇O₄(aq) + H₃O⁺(aq)
Initial: x 0 0
Change: -a +a +a
Equilibrium: x-a x+a x+a
So, Ka for acetylsalicylic acid will be calculated by putting values on the above equation as:
Ka = [x+a][x+a] / [x-a]
Value of a is negligible as compared to the value of x of acetylsalicylic acid so the term x-a becomes x and equation will be written as:
Ka = (x+a)² / x
By knowing the all values of concentration we can calculate the value of Ka.
Hence Ka value for acetylsalicylic acid will be calculated by using the formula as Ka = (x+a)² / x.
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Why is glass a good insulator? a.the atoms in glass do not hold on tightly to their negatively charged particles. b the atoms in glass do not hold on tightly to their positively charged particles. c the atoms in glass hold on tightly to their negatively charged particles. d the atoms in glass hold on tightly to their positively charged particles.
Glass is known to be a good insulator because atoms in glass hold on tightly to their positively charged particles , Option D is the correct answer.
What is an insulator ?
Insulators are those substances that do not conduct heat or electricity like their conductor counterparts.
Conduction of electric charges is as a result of the free flow of electrons in the atom of the substance.
Hence, a good insulator holds on tightly to its electrons and prevent them from flowing freely to conduct electric charges.
Therefore, Glass is known to be a good insulator because atoms in glass hold on tightly to their positively charged particles.
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B. Atoms in glass hold tightly to their negatively charged particles
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What is the temperature of 0.80 mol of a gas stored in a 275 ml cylinder at 175 kpa? use p v equals n r t. and r equals 8.314 startfraction l times kilopascals over moles time k endfraction.. 4.6 k 7.2 k 61 k 96 k
The temperature of the ideal gas is 7.235 K.
Temperature of the ideal gasThe temperature of the ideal gas is calculated as follows;
PV = nRT
T = PV/nR
where;
P is pressure of the gasV is volume of the gasn is number of molesR is ideal gas constant = 8.314 L.kPa/mol.KT = (175 x 0.275) / (0.8 x 8.314)
T = 7.235 K
Thus, the temperature of the ideal gas is 7.235 K.
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Answer:
7.2 k
Explanation:
edge
An increase in carbon dioxide in the atmosphere is associated with an increase in global temperature. Which property of carbon dioxide is responsible for this temperature increase?
A. Carbon dioxide transmits more sunlight than other atmospheric gases.
B. Carbon dioxide efficiently turns sunlight into heat.
C. Carbon dioxide keeps heat in the atmosphere from escaping into space.
D. Carbon dioxide stores solar energy in chemical bonds.
Answer:
Pretty sure its C.
Explanation:
Carbon dioxide is known for trapping heat in the Earth's atmosphere so this makes sense.
Hope this helped!
What is the vaccine ??
Answer:
a vaccine is a needle they give in your arm.
Explanation:
In acidic solution, ________. In acidic solution, ________. [h3o ]= 0m [h3o ]=[oh−] [h3o ]>[oh−] [oh−]> 7. 00 [h3o ]<[oh−]
In acidic solution, [H₃O ] > [OH⁻]. The correct option is C.
What is hydronium and hydroxide ion?Hydronium ion is the simplest form of oxonium ion, and it is derived from the protonation of water. It is produced by dissolving the Arrhenius acid in water.
Hydroxide ion is a diatomic anion formed with oxygen and hydrogen with single covalent bond.
The concentration of hydronium ions in an acidic aqueous solution will be higher than the concentration of hydroxide (OH-) ions.
Thus, the correct option is C, [H₃O ] > [OH⁻].
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If a person drinks a lot of water, the water content of their blood will increase.
describe how the water content of their blood is regulated.
Explanation:
Less water is reabsobed into the blood.
if it is a low water blood the blood glucose level are regulated by the liver and pancreas
The world's deserts are typically found at 30°N and 30°S latitudes because of ________. the circulation around the Ferrel cells the circulation around the Hadley cells the circulation around the Polar cells none of the above
Answer: The circulation around the Hadley cells
Explanation:
The world's deserts are typically found at 30°N and 30°S latitudes because of the circulations around the Hadley cells. Thus, the correct option is B.
How does sir circulates around Hadley cells?Within each cell, the air moves in a circular motion. Taking the Hadley cell, the warm air at the equator (0° latitude) rises and then cools down in the upper atmosphere, and then circles back down towards the tropics of around 30° latitude.
As the air leaves equator, it rains away more moisture, becoming denser and slightly cooler in temperature, until it finally dry, sinks, and creates the arid bands where many of the world's famous deserts lie. This giant atmospheric conveyor belt, is called a Hadley cell, brings both the tropical rain forests and deserts.
Therefore, the correct option is B.
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What mass of nitrous oxide gas (N2O) is contained in 40.0 L balloon at a pressure of 130.0 kPa and a temperature of 25 °C?
**I NEED ANSWERS STEP BY STEP PLEASE**
The mass of the N₂O in the given question is 92.4g.
What is the moles of N2O in the given conditions?STEP1- Apply the ideal gas equation
PV=nRT
STEP2- Put the given values in the equation
P=130kPa, T=298K, V=40L R=8.31
STEP3- Solve the equation
N=PV/RT,
N=130×40/8.31×298
N=2.1moles
N=mass/molecular mass
mass=2.1×44
mass = 92.4g
Hence, the mass of N₂O is 92.4g.
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N2 + 3H2 to 2NH3 In a certain reaction you start with 4 moles of nitrogen and 10 moles of hydrogen. how many miles of the excess reactant will be left over
Answer:
Explanation:
We know that for every mole of nitrogen consumed, 3 moles of hydrogen are consumed.
For the nitrogen, this means the reaction can occur 4/1 = 4 times.For the hydrogen, this means the reaction can occur 10/3 = 3.33 times.So, hydrogen is the limiting reactant, and if 10 moles of hydrogen are used, then the reaction will occur 3.33 times.
Hence, this means there is enough nitrogen left for the reaction to occur another 0.67 times, and hence 0.67 moles of nitrogen will be left over.
