Sample b 10 mL of water and sample c 20 mL of water have the same boiling point ,therefore option (b) and option (c) are correct .
What do you mean by the boiling point of water ?The boiling point is defined as the temperature at which a liquid’s saturated vapor pressure equals the atmospheric pressure surrounding it.
The boiling point of water is the temperature at which the liquid water vapor pressure is equal to the pressure surrounding the body, and the body transforms into a vapor.
The boiling point is the temperature for a particular liquid to boil at.
For example, the boiling point for water, at a pressure of 1 a t m, is 100 degrees Celsius.
Sample b 10 mL of water and sample c 20 mL of water have the same boiling point ,hence option (b) and option (c) are correct .
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what is the molar mass of BaBr2?
multiple choice on the picture
B. 297.1 g/mol
Is your answer! ;)
Answer: Option (B) is the correct answer.
Explanation:
Molar mass is defined as the sum of atomic mass of all the atoms present in a compound.
For example, atomic mass of barium (Ba) is 137.32 g/mol and atomic mass of a bromine atom is 79.90 g/mol.
Therefore, calculate molar mass of [tex]BaBr_{2}[/tex] as follows.
Molar mass = atomic mass of Ba + 2 [tex]\times atomic mass of Br[/tex]
= [tex]137.32 g/mol + 2 \times 79.90 g/mol[/tex]
= 297.12 g/mol
Therefore, we can conclude that molar mass of [tex]BaBr_{2}[/tex] is 297.1 g/mol.
Select the correct answer.
Lyndon is investigating whether putting plastic on her windows will help seal out cold winter drafts. She covers a window on the south side of her house with plastic and measures the inside temperature near the window. She also measures the inside temperature near a window without plastic on the north side of her house. The windows are the same size and design. Why is this not an ideal controlled investigation?
A. The windows should be different sizes to introduce variation.
B. The drafts at each window may be different because the windows aren’t near each other.
C. Temperature isn’t a good indicator of cold winter drafts.
D. Outside temperature is a better indicator of cold winter drafts than inside temperature.
E. The type of plastic used in the investigation isn’t mentioned.
Answer: B
Explanation: PLATO
Which of the following is a reasonable ground-state electron configuration?
1s21p62d2
1s22s42p6
1s22s22p5
1s22s22d6
Answer is: 1s22s22p5.
1) Electron configuration 1s²1p⁶2d², this is not reasonable because 1p and 2d oritals do not exist.
2) Electron configuration 1s²2s⁴2p⁶, this is not reasonable because s orbitals only contain 2 electrons.
3) Electron configuration 1s²2s²2p⁵ is of an element fluorine. Fluorine (F) has atomic number 9, which means it has 9 protons and 9 electrons.
4) Electron configuration 1s²2s²2d⁶, this is not reasonable because 2d orbitals do not exist.
As the firetruck got closer, Sal noticed that the pitch of the siren got higher. Why did this happen?
The change in pitch of the firetruck's siren as it gets closer to the observer is due to the Doppler effect. As the firetruck approaches, the siren's pitch appears to increase, and as it moves away, the pitch appears to decrease. This phenomenon can be observed with passing cars, airplanes, and trains as well.
Explanation:The change in pitch of the siren as the firetruck gets closer is due to the Doppler effect. This effect describes the change in frequency of a sound wave or light wave as the source of the wave or the observer of the wave moves relative to each other.
In the case of the firetruck siren, as the firetruck approaches Sal, the pitch of the siren appears to increase because the sound waves are compressed, resulting in a higher frequency. As the firetruck moves away from Sal, the pitch appears to decrease because the sound waves are stretched, resulting in a lower frequency.
This change in pitch can also be observed with passing cars, airplanes, and trains, where the pitch decreases as they move away from the observer. The faster the firetruck (or any moving source) moves, the greater the shift in pitch.
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As the firetruck moves towards Sal, [tex]\( v_s \)[/tex] is negative (since it is moving towards the observer), which results in [tex]\( f' \)[/tex] being greater than [tex]\( f \)[/tex], indicating a higher pitch. Once the firetruck passes Sal and moves away, [tex]\( v_s \)[/tex] becomes positive, and the pitch Sal hears decreases, becoming lower than the emitted frequency.
The phenomenon Sal observed is known as the Doppler effect. As the firetruck approached Sal, the pitch of the siren got higher due to the Doppler effect.
The Doppler effect is a change in frequency or wavelength of a wave in relation to an observer who is moving relative to the wave source. This effect is commonly experienced with sound waves, such as the siren of an approaching firetruck.
When the firetruck is moving towards Sal, each successive sound wave is emitted from a position closer to Sal than the previous one. This causes the waves to be compressed in front of the firetruck, leading to a higher frequency of sound waves reaching Sal's ears. Since frequency is perceived as pitch, the siren sounds higher in pitch as the firetruck approaches.
Mathematically, the Doppler effect can be described by the following equation for sound waves:
[tex]\[ f' = \left( \frac{v + v_o}{v + v_s} \right) f \][/tex]
where:
[tex]- \( f' \)[/tex] is the observed frequency (the pitch Sal hears).
[tex]- \( f \)[/tex] is the emitted frequency (the actual pitch of the siren).
[tex]- \( v \)[/tex] is the speed of sound in air.
[tex]- \( v_o \)[/tex]is the speed of the observer (in this case, Sal is stationary, so[tex]\( v_o = 0 \))[/tex].
[tex]- \( v_s \)[/tex] is the speed of the source (the firetruck).
Show the empirical formula manganese fluoride; 59.1% Mn and 40.9% F. Fill in the subscripts on the formula below. Make sure to have a whole number of each subscript, even if it is a 1. Mn____ F____.
Hey there!:
Given % of Mn=59.1% means 59.1 g of Mn present in 100 g of manganese fluoride.
Molar mass of Mn= 54.938 g/mol
Moles of Mn = mass / molar mass
59.1 /54.938 => 1.07 ≈ 1 mol.
and % of F=40.9% means 40.9 g of of F present in 100 g of manganese fluoride.
Molar mass of F=18.998 g/mol
Moles of F :
40.9 / 18.999 => 2.15 mol ≈ 2 mol.
The mole ratio between Mn:F= 1 : 2
Therefore the empirical formula of manganese fluoride:
=> MnF2=Mn1F2
Hope that helps!
Answer : The empirical formula of manganese fluoride is [tex]Mn_1F_2[/tex].
Solution : Given,
If percentage are given then we are taking total mass is 100 grams.
So, the mass of each element is equal to the percentage given.
Mass of Mn = 59.1 g
Mass of F = 40.9 g
Molar mass of Mn = 54.94 g/mole
Molar mass of F = 18.99 g/mole
Step 1 : convert given masses into moles.
Moles of Mn = [tex]\frac{\text{ given mass of Mn}}{\text{ molar mass of Mn}}\times 1\text{ mole of Mn}[/tex] = [tex]\frac{59.1g}{54.94g/mole}\times 1\text{ mole of Mn}[/tex] = 1.076 moles
Moles of F = [tex]\frac{\text{ given mass of F}}{\text{ molar mass of F}}\times 1\text{ mole of F}[/tex] = [tex]\frac{40.9g}{18.99g/mole}\times 1\text{ mole of F}[/tex] = 2.154 moles
Step 2 : For the mole ratio, divide each value of moles by the smallest number of moles calculated.
For Mn = 1.076/1.076 = 1
For F = 2.154/1.076 ≈ 2
Mn : F = 1 : 2
The mole ratio of the element is represented by subscripts in empirical formula.
Therefore, the Empirical formula = [tex]Mn_1F_2[/tex]
How to identify a Chemical Property and a Chemical Change?
Physical properties are the traits of an object that can be readily seen such as size, color and state. Measuring or changing these properties does not affect the chemical nature of the matter. For example, a paper that is cut into small pieces has undergone a physical change. The pieces have a different quantity, size, shape and texture than the original sheet.
Chemical properties are the characteristics that describe the composition of matter. These traits are carried by each individual atom, or part of matter. Some examples of chemical properties include combustibility, flammability and reactivity. Another way to look at this is to think of the chemical properties as potentials. Dry paper has the potential to burn; this is flammability, a chemical property. Magnesium metal has the potential to combine with oxygen and form Magnesium Oxide.
You have a cup of water and a packet of powdered juice mix. You stir some of the powder into the cup of water and it quickly dissolves. You decide to add more juice mix to the cup and stir again. Again, the powder quickly dissolves. What can you conclude about the juice powder and water solution?
The powdered juice mix quickly dissolves in the water, indicating that it forms a solution. Stirring the mixture can increase the rate of dissolution. The fact that the mix dissolves again when more is added suggests that the solution was not saturated.
Explanation:The fact that the powdered juice mix quickly dissolves when added to the cup of water suggests that it forms a solution with the water. A solution is a homogenous mixture in which the solute particles are very small and become uniformly dispersed throughout the solvent. The rate of dissolution can be increased by stirring the mixture, which allows fresh solvent molecules to continually come into contact with the solute. Additionally, the fact that the mix quickly dissolves again when more is added suggests that the solution was not saturated and still had room for more solute to be dissolved.
Final answer:
The powdered juice mix forms a stable solution with the water, as indicated by its quick and complete dissolution. The act of stirring increases the rate of dissolution by allowing fresh solvent molecules to interact with the solute particles. The solution remains stable, without any settling or changes, and can pass through a filter without any separation.
Explanation:
The quick dissolution of the powdered juice mix in the cup of water indicates that it forms a stable solution. When a solute, such as the juice mix, is fully dissolved in a solvent, like water, it creates a homogeneous mixture called a solution. In this case, the solute particles in the juice mix are very small, allowing them to dissolve easily in the water.
Stirring the solution aids in dissolving more of the juice mix because it increases the frequency of collisions between the solvent molecules (water) and the solute particles (juice mix), increasing the rate of dissolution. Agitating the solution ensures that fresh solvent molecules continuously come into contact with the solute, speeding up the process.
By observing the quick dissolution of the juice mix and its ability to stay in solution without settling or changing upon passing through a filter, we can conclude that the juice powder and water solution forms a stable and fully dissolved mixture.
What is the chemical formila for monosaccharides?
Final answer:
The chemical formula for monosaccharides is CnH2nOn, where n can be any number greater than two. Glucose, a common monosaccharide, has a molecular formula of C6H12O6. Monosaccharides can exist as linear chains or as ring-shaped molecules, with glucose having two different arrangements of the hydroxyl group in its ring form.
Explanation:
The chemical formula for monosaccharides is CnH2nOn, where n can be any number greater than two. For example, glucose, a common monosaccharide, has a molecular formula of C6H12O6.
Monosaccharides can exist as linear chains or as ring-shaped molecules. In-ring forms, glucose can have two different arrangements of the hydroxyl group (OH) around the anomeric carbon. If the hydroxyl group is below carbon number 1 in the sugar, it is in the alpha (α) position, and if it is above the plane, it is in the beta (β) position.
The ring-forming reaction between the hydroxyl group and the carbonyl group occurs at carbon number 1, which is the anomeric carbon.
A sample of gas has a mass of 827 mg . Its volume is 0.270 L at a temperature of 88 ∘ C and a pressure of 975 mmHg . Find its molar mass.
Steps:
Mw = w * R * T / p * V
T = 88 + 273 => 361 K
p = 975 mmHg in atm :
1 atm = 760 mmHg
975 mmg / 760 mmHg => 1.28 atm
Therefore:
= 0.827 * 0.0821 * 361 / 1.28 * 0.270
= 24.51 / 0.3456
molar mass = 70.92 g/mol
Answer:
The molar mass of the gas is 70.83 g/mol.
Explanation:
Mass of the gas m= 827 mg = 0.827 g
Molar mass of gas = M
Pressure of the gas = 975 mmHg = 1.28 atm
Temperature of the gas = 88^C= 361 K
Using idal gas equation:
[tex]PV=nRT[/tex]
[tex]PV=\frac{m}{M}\times RT[/tex]
[tex]M=\frac{mRT}{PV}[/tex]
[tex]M=\frac{0.827 g\times 0.0820 atm L/mol K\times 361 K}{1.28 atm \times 0.270 L}=70.83 g/mol[/tex]
The molar mass of the gas is 70.83 g/mol.
Which statements describe molecules? Check all that apply.
Molecules are made of two or more atoms. A
Molecules are all the same size B
Molecules range in size. C
Molecules are only made of atoms of the same element. D
Molecules are only made of atoms of different elements. E
Molecules are made of atoms of the same element or different elements.F
The following answers are A, C, and F
Molecules are composed of two or more atoms and can vary greatly in size. They can be made of either the same or different elements. Examples include O₂ for the same element and H₂O for different elements.
Let's review each statement to determine whether it accurately describes molecules:
Molecules are made of two or more atoms. (Correct) - Molecules are composed of two or more atoms bonded together chemically. For example, an oxygen molecule (O₂) consists of two oxygen atoms.Molecules are all the same size. (Incorrect) - Molecules vary in size depending on the number of bonded atoms and their arrangement. Smaller molecules, like O₂, have only a few atoms, whereas larger molecules, like DNA, can have millions of atoms.Molecules range in size. (Correct) - As mentioned, molecules can range from very small, like hydrogen molecules (H₂), to very large, like DNA.Molecules are only made of atoms of the same element. (Incorrect) - Molecules can consist of atoms of the same element or different elements. For instance, a water molecule (H₂O) consists of two hydrogen atoms and one oxygen atom.Molecules are only made of atoms of different elements. (Incorrect) - While some molecules, like CO₂, have different elements, others, like O₂, are made of the same element.Molecules are made of atoms of the same element or different elements. (Correct) - Molecules can be formed from either the same element, like O₂, or different elements, like H₂O.An atom has 9 electrons and 9 protons at the start. If it loses 2 electrons, the net charge on the atom will be . If the atom instead gains 4 electrons, the net charge will be
Answer: If the atom loses 2 electrons, the net charge on the atom will be 2+
If the atom gains 4 electrons, the net charge on the atom will be 4-
Explanation:
An atom is smallest unit of a matter or substance.It consist of three subatomic particles : electrons, protons, neutrons.
Protons are positively charged, neutrons are neutral and both are located in nucleus where mass of an atom is concentrated.
Electrons are negatively charged and are located outside the nucleus where they orbit in different energy levels around the nucleus.
In an atom, when electrons are lost, the atom gains a positive charge and forms cation. In an atom, when electrons are gained, the atom occupies a negative charge and forms anion.
Thus an atom with 9 electrons and 9 protons will be electrically neutral.
On losing 2 electrons, there will be 7 electrons and 9 protons will have 2+ charge.On gaining 4 electrons, there will be 13 electrons and 9 protons will have 4- charge.
which of these is an example of a physical change
A. breaking Bread
B. baking Bread
C. digesting Bread
D. toasting Bread
Which statements describe organic compounds? Check all that apply.
Organic compounds are commonly found in living things.
Organic compounds are not associated with or made from living things.
Organic compounds contain carbon.
Organic compounds usually lack carbon. Organic compounds are found in food.
Answer: The answers are A C E. I took the test.
Explanation:
Select all that apply.
Which of the following are homogeneous solutions?
sugar water
air
peanuts and water
an unopened soft drink
cement
Which acid has the formula HNO2?
If it was HNO3 then it would be Nitric Acid (ic)
But it is HNO2 and that is Nitrous Acid (ous)
The less joiners is ''OUS''
The more joiners is ''IC'' .
Finally the answer is Nitrous acid.
Nitrous acid, with the formula HNO₂, is a weak acid significant in many chemical processes and cannot be isolated in pure form. It is used for the production of hydroxylamine, diazotizations, and the synthesis of various compounds such as azo dyes and drugs. Nitrous acid also forms specific coordination compounds with NO₂ acting as either a nitro or nitrito ligand.
The acid with the formula HNO₂ is known as nitrous acid. Nitrous acid is a weak acid with a pKa of 3.15 at 25°C and it cannot be isolated in pure form.
It primarily exists in aqueous solutions and is a significant reagent in various chemical processes including the production of hydroxylamine (NH₂OH), diazotization of aromatic amines, and the manufacture of azo dyes and drugs. Moreover, nitrous acid plays a role in the chemistry of coordination compounds, where NO₂ can act as a monodentate nitro (N-coordination) or nitrito (O-coordination) ligand.
Other oxoacids of nitrogen include nitric acid (HNO₃), which is also an essential acid in the chemical industry. Nitric acid is stronger than nitrous acid and is produced through the Ostwald process, which eventually oxidizes ammonia to NO₂, and subsequently to nitric acid.
What are the two main types of luster? A. dense and porous B. coarse and smooth C. metallic and nonmetallic D. striated and non-striated
The answer is metallic and nonmetallic.
Answer:
The answer is C. Metallic and Non-metallic.
Explanation:
Luster is a physical property that shows how light acts on the surface of a material and how it is reflected in it. The main types of brightness are:
Metallic shine = This type of shine occurs in metals, since they are very opaque and whose surface has a lustrous appearance, that is, it totally reflects light.Non-metallic shine = This type of shine is presented in minerals with a light color, produced by transparent substances, such as the diamond.A copper coin with a mass of 6.30 grams changes temperature in the sunshine from 20.0°C to 32.0°C. How much energy is transferred? The specific heat capacity of copper is 0.377 joules/gram degree Celsius. Express your answer to three significant figures.
The energy transferred is 28.5 j
calculation
energy is calculate MCΔT formula where,
M(mass)= 6.30 grams
C(specific heat capacity)= 0.377 j/g
ΔT(change in temperature)= 32.0c- 20 c= 12 c
Energy is therefore= 6.30 g x 0.377 j/g /c x 12 c =28.5 j
The energy transferred is 28.5 j.
PLLLLLSSS HELP!!!!!!!!!!!!!!!!!! What are the roles of the substances in the equation?
A- The substances 3CO2 and 4H2O are reactants that react to form the products C3H8 and 5O2.
B-The substances C3H8 and 3CO2 are reactants that react to form the products 5O2 and 4H2O.
C-The substances C3H8 and 5O2 are reactants that react to form the products 3CO2 and 4H2O.
D- The substances 5O2 and 3CO2 are reactants that react to form the products C3H8 and 4H2O.
The substances C3H8 and 5O2 are the reactants and 3CO2 and 4H2O are the products in the equation. These reactants combine to form the products in a process known as a chemical reaction, more specific, a combustion reaction.
Explanation:The correct answer is C: The substances C3H8 and 5O2 are reactants that react to form the products 3CO2 and 4H2O. In a chemical reaction, the reactants are the substances that start the process, and they are normally written on the left side of a chemical equation. The products are the substances that are produced, and they are usually written on the right side of the chemical equation.
For instance, in the chemical equation you've mentioned (C3H8 + 5O2 -> 3CO2 + 4H2O), the reactants - propane (C3H8) and oxygen (5O2) combine to form carbon dioxide (3CO2) and water (4H2O). Hence, the reactant side has C3H8 and 5O2, while the product side has 3CO2 and 4H2O. This reaction is an example of a combustion reaction.
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what are all of the elements that end with F electrons
The elements whose electron configurations end with f electrons are in the Lanthanide and Actinide series: those long series at the bottom of the Periodic Table (see image).
The atoms are adding electrons into f orbitals, but the f electrons are not always the last electrons in the electron configuration.
For example, the electron configuration of Eu is [Xe]6s²4f⁷, but that of Gd
is [Xe] 6s²4f⁷5d.
I have blocked off in red all the exceptions like Gd.
What is the pH of a solution that has a [H+] of 1.5 × 10−5 M?
pH = 4.82
[H⁺] = 1.5 × 10⁻⁵ mol·L⁻¹.
pH = -log[H⁺] = -log(1.5 × 10⁻⁵) = 4.82
1.00 g of He, 14.0g F2, and 19.0 g Ar are placed in a 13.0-L container at 20.0 °C. The total pressure (in atm) in the container is _____ atm.
Final answer:
To find the total pressure in the container, calculate the moles of each gas, use the ideal gas law to find the partial pressures, and then sum them up.
Explanation:
To find the total pressure in the container, we need to calculate the partial pressures of each gas and then sum them up.
First, we calculate the moles of each gas using their molar masses:
He: 1.00 g / 4.0026 g/mol = 0.2499 mol
F2: 14.0 g / 38.0 g/mol = 0.3684 mol
Ar: 19.0 g / 39.948 g/mol = 0.4755 mol
Next, we use the ideal gas law to calculate the partial pressures:
He: P(He) = (moles of He) x (R) x (temperature) / (volume) = (0.2499 mol) x (0.0821 L atm/mol K) x (293.0 K) / (13.0 L) = 0.498 atm
F2: P(F2) = (moles of F2) x (R) x (temperature) / (volume) = (0.3684 mol) x (0.0821 L atm/mol K) x (293.0 K) / (13.0 L) = 1.064 atm
Ar: P(Ar) = (moles of Ar) x (R) x (temperature) / (volume) = (0.4755 mol) x (0.0821 L atm/mol K) x (293.0 K) / (13.0 L) = 1.276 atm
Finally, we sum up the partial pressures to get the total pressure in the container:
Total pressure = P(He) + P(F2) + P(Ar) = 0.498 atm + 1.064 atm + 1.276 atm = 2.838 atm
what volume of silver metal Will Weigh exactly 2500 .0 g the density of silver is 10.5 g/ cm3 squared
Hello!
The formula is density = mass / volume
=> volume = mass / density
volume = ?
mass = 2500.0 g
density = 10.5 g/cm3
volume = mass / density
volume = 2500.0 g / 10.5 g/cm3
volume = 2380.95 cm3
Hope this help!
The volume of silver that weighs exactly 2500.0 g is approximately 238.095 cm³, if the density of silver as 10.5 g/cm³.
To find the volume of silver that weighs exactly 2500.0 g, we use the formula for density, which is:
Density = Mass / Volume
Given the density of silver as 10.5 g/cm³, we can rearrange the formula to solve for volume:
Volume = Mass / Density
Substituting the given values:
Volume = 2500.0 g / 10.5 g/cm³
Volume ≈ 238.095 cm³
This means that a volume of approximately 238.095 cm³ of silver will weigh 2500.0 g.
A 75.0-milliliter lightbulb is filled with neon. There are 7.16 × 10-4 moles of gas in it, and the absolute pressure is 116.8 kilopascals after the bulb has been on for an hour. How hot did the bulb get?
n = number of mole of sample of helium gas = 7.16 x 10⁻⁴ moles
T = temperature of the gas = temperature of the bulb ?
V = Volume of helium gas = 75 mL = 7.5 x 10⁻⁵ m³
P = pressure of the helium gas = 116.8 kPa = 116.8 x 10³ Pa (1 k = 1000)
Using the equation
P V = n R T
inserting the values
(116.8 x 10³) (7.5 x 10⁻⁵) = (7.16 x 10⁻⁴) (8.314) T
T = 1471.6 C
Answer: 1470 K
Explanation: It asks to calculate the kelvin temperature of the light bulb. Looking at the given info, it is based on ideal gas law equation, PV=nRT.
Given:
V = 75.0 mL = 0.0750 L
P = 116.8 kPa
We know that 101.325 kPa = 1 atm
So,
= 1.15 atm
R is universal gas constant and its value is .
T = ?
Let's plug in the values in the equation and solve it for T.
0.08625 = 0.00005878(T)
T = 1467 K
So, the temperature of the light bulb would be 1467 K, but since we have to round the total to equal 3 significant figures, the answer is 1470 K
2.1 x10^3 + 2.1 x 10^2
Please help!!!
Its not chemistry is science.
If we removed the producers from this food web, how would it affect the balance of the ecosystem?
There would be a decrease in consumers and decomposers.
There would be an increase in primary consumers and a decrease in secondary consumers.
There would be a decrease in primary consumers and an increase in secondary consumers.
There would be an increase in consumers and decomposers.
There would be a decrease in consumers and decomposers.
Removing producers would slowly but surely cause the entire food web to tumble. With this in mind - we can say that the answer is A (There would be a decrease in consumers and decomposers) - because everything will lessen with the removal of producers.
Why do elements such as Neptunium, Plutonium, Californium, Einstenium, Bohrium, Flerovium, Radon, Oganesson, and a few others have half a number in parentheses at the bottom of their box on the periodic table instead of the atomic weight? Thanks! :)
All the elements you listed share a common trait: they are synthetic, radioactive elements. These elements do not have a stable isotope, so for a radioactive element, its most stable isotope's atomic mass will be listed in parentheses.
One such example would be plutonium. This element has 6 different isotopes with differing half-lives. The most stable isotope for plutonium is plutonium-244, with a half-life of around 80 million years. Therefore, the atomic mass listed for plutonium will be (244).
Which equation obeys the law of conservation of mass?
A.
2Fe + 3O2 → 2Fe2O3
B.
4Fe + O2 → 2Fe2O3
C.
Fe + O2 → Fe2O2
D.
4Fe + 3O2 → 2Fe2O3
The atomic number of nitrogen is 7. How many protons, neutrons, and electrons make up an atom of Nitrogen-15?
A nonpartisan iota of Nitrogen has a mass of 18. There are 7 protons in the core of this iota. What number of neutrons, complete electrons, and valence electrons are available
Nitrogen 15 has a nuclear mass of 15. The mass number is # protons in addition to # of neutrons, so for N-15 mass is 15 and the protons are dependably 7 so there must be 15-7=8 neutrons. N-15 has 7 electrons since it has 7 protons and p = e.
Two cups of the same size are filled to the brim with clear liquids. Only one container holds water. The other contains a liquid that has greater density than water. How could you safely identify the container holding the water? A) See which cup feels heavier. B) Taste the liquid in both cups. C) Touch the liquid in both cups. D) Add salt to the liquids to see if it dissolves.
Answer: A) See which cup feels heavier.
Explanation:
Density is defined as the mass contained per unit volume.
[tex]density=\frac{mass}{volume}[/tex]
Thus if a liquid is more denser than water, it contains more mass per unit volume and thus feel heavier.
We cannot taste or touch liquids as the liquid can be corrosive.
Both the liquids can be polar and thus both can dissolve ionic compound i.e salt in it.
Thus the other liquid that has greater density than water feels heavier than water.