The mass number of an isotope is calculated by adding the number of protons and neutrons. In this case, an isotope of mercury has a mass number of 200 (80 protons + 120 neutrons).
Explanation:The subject of your question is an isotope of mercury, which according to the information you provided, has 80 protons and 120 neutrons. In terms of nuclear structure, an isotope's mass number is the sum of its protons and neutrons. As such, if we add the number of protons (80) to the number of neutrons (120), we find that this isotope of mercury has a mass number of 200.
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A certain compound is made up of one carbon (c) atom, two fluorine (f) atoms, and one oxygen (o) atom. What is the chemical formula of this compound?
The chemical formula is CF₂O.
Answer:
The chemical formula is [tex]CF_2O[/tex]
Explanation:
To determine how the molecule will be conformed you need to have in mind the valence number of each element present:
F= -1 O= -2 C= +4Now, as the only one positive, the C will be the central atom with a doble bond to the O and a single bond to each F.
In that way all atoms completed the octet and achive stability
16) Which of these is a physical property? A) boiling point B) flamability C) reactivity D) toxicity
a physical property would be a. boiling poing
Answer: A) boiling point
Explanation:
Chemical property is defined as the property of a substance which is observed during a reaction where the chemical composition identity of the substance gets changed.
Physical property is defined as the property which can be measured and whose value describes the state of physical system. For Example: State, density etc.
Boiling point is a physical property as it involves change of state.
Flammability is a chemical property as there is formation of new substances.
Reactivity is a chemical property as there is formation of new substances.
Toxicity is a chemical property as there is formation of new substances.
Which of the following is the electron configuration of an electrically neutral alkaline earth metal
A. 1s2 2s1
B. 1s2 2s2 2p2
C. 1s2 2s2 2p6 3s1
D. 1s2 2s2 2p6 3s2 3p6 4s2
I feel like the answer is D, but I’m not sure.
Answer:
Option d, 1s2 2s2 2p6 3s2 3p6 4s2
Explanation:
Alkaline earth metals belong to group 2 of the periodic table. Elements belonging to group 2 are beryllium, magnesium, calcium, strontium and barium and radium.
Alkaline earth metals have 2 valence electrons and these two electrons are filled in outermost s sub shell.
General electronic configuration of alkaline earth metal: ns^2
In ionized state, number of electrons in s sub shell will not be 2.
Among the given, only 1s2 2s2 2p6 3s2 3p6 4s2, has 2 electrons in s sub shell. So, it an electronic configuration of neutral alkaline earth metal.
The correct answer to the question is Option D. 1s² 2s²2p⁶ 3s²3p⁶ 4s²
Alkaline earth metals are metals belonging to the group 2 of the periodic table.
They have 2 valence electrons.
Now, we shall determine which of the option given above that has valency of 2 electrons
For Option A1s² 2s¹
Valence electron shell = 2s¹
Valence electron = 1For Option B1s² 2s²2p²
Valence electron shell = 2s²2p²
Valence electron = 2 + 2
Valence electron = 4For Option C1s² 2s²2p⁶ 3s¹
Valence electron shell = 3s¹
Valence electron = 1For Option D1s² 2s²2p⁶ 3s²3p⁶ 4s²
Valence electron shell = 4s²
Valence electron = 2From the illustraton made above, we can see that only Option D has a valence electron of 2.
Therefore, the correct answer to the question is Option D. 1s² 2s²2p⁶ 3s²3p⁶ 4s²
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The prefix 'mili-' means a thousandth. So a mili-liter is a thousandth of a liter. 1 mililiter = 1/1000 liter How many liters is 1,838 mililiters? Round your answer to the nearest tenth of a liter
Answer:
Answer:- 1.8 L
Solution:- The given volume is 1838 mililiters and we are asked to convert it to liters. We know that:
[tex]1mL=(\frac{1}{1000})L[/tex]
Where, mL stands for mililiters and L stands for liters.
Let's make the set up using this conversion factor to convert the given mL to L.
[tex]1838mL(\frac{1L}{1000mL})[/tex]
= 1.838 L
They asks to round the answer to the nearest tenth. So, it becomes 1.8 L.
If a decrease in temperature accompanies a reaction, what occurred?
Question 1 options:
Energy was released.
Energy was destroyed.
Energy was created.
Energy was absorbed.
If a decrease in temperature accompanies a reaction, Energy was absorbed.
So the forth option is correct option.
Explanation:If decrease in temperature occurs during a reaction, it indicates that the reaction is endothermic reaction.Endothermic process describes the process or reaction in which the system absorbs energy from its surroundings, usually in the form of heat.So energy in form of heat is absorbed.Use the Periodic Table. Choose the correct electron configuration of carbon using the data shown in the electron configuration chart. 1s22s22p1 1s22s22p4 1s22s22p2 1s22s12p2
I think I have done a question like this before and i'm pretty sure your answer would be the 2nd one 1s22s22p4. I'm not 100% sure but try it at least.
Answer:
electron configuration of carbon: 1s²2s²2p²
Explanation:
The electron configuration of atoms (or ions) is depicted based on the Aufbau principle according to which electrons are added to various orbitals such that the orbital with the lowest energy gets occupied first followed by the next higher orbital.
The energy ordering of orbitals from the lowest to the highest is:
1s < 2s < 2p < 3s < 3p < 4s < 3d ....
s orbitals can accommodate a maximum of 2 electrons
p orbitals = 6 electrons
d orbitals = 10 electrons
Now, the atomic number of carbon = 6
Since it is neutral, the atomic number = number of electrons = 6
Based on the Aufbau principle the electron configuration of C would be
1s²2s²2p²
Will give brainliest! Describe two physical and two chemical changes involved in cooking
Two physical changes is:
• Breaking
• Boiling
Two chemical changes could be:
• Molecules rearranging with other molecules to make new substance
• Bubbling/fizzing
A scientist discovers a new type of polymer. What must be true about this polymer?
A.
It contains carbon atoms arranged in a ring structure.
B.
It has double bonds between all the carbon atoms.
C.
It contains molecules of many different types.
D.
It is made of large molecules with repeating units.
This polymer must D. be made of large molecules with repeating units.
A polymer consists of long chains of smaller repeating units called monomers.
For example, polyethylene consists of long chains of ethylene (CH₂=CH₂) units joined together end to end.
The formula for polyethylene is -CH₂CH₂-(CH₂CH₂)ₙ-CH₂CH₂-, where n is usually a number between 500 and 10 000.
50 points!!! Based on your observations in the virtual lab, fill in the data table below.
Question 2 options:
Separated using a filter; magnetism
Separated using a magnet; malleability
Separated using filtration; conductivity
Separated using a magnet; magnetism
Hi Khal75,
Experiment: How to seperate iron fillings
Iron fillings is a substance that attracts to magnets.
Answer - Separated using a magnet; magnetism
If you move a magnet around different solids with the iron fillings in it, it wil attract the iron to be able to seperate it.
Why do you think scientist can use the basic properties of matter to help identify an unknown substance?
They can use the properties to test and come to some kind of conslusion about the object because in some way it's gotta correlate back to one of the different properties of matter.
The prefix 'kilo-' means a thousand.
1 kilogram=1,000 grams
How many kilograms is 527 grams?
Round your answer to the nearest tenth of a kilogram.
I get 0.54 im i correct
Answer: 0.5 kilograms
Explanation:
One kilogram is equal to a thousand grams.
Supposing x to be the number of kilograms equal to 527 grams, we can write it as:
1 kg = 1000 grams
x kg = 527 grams
To solve for x, we can simply divide 527 grams by 1000 thousand grams to get the answer.
x = 527 / 1000
x = 0.527
Rounding this value to the nearest tenth, it will become 0.5 kilograms.
Given data:
Mass in grams = 527 g
Mass in kilograms = ?
Solution:
1 kilogram=1,000 grams
1 gram = 1/1000 kilograms
527 gram = 1/1000 * 527
527 grams = 0.527 kilogram
Round of answer: 00.5 kg
Part 2.You get 0.54 but the calculated answer is 0.572.
So without round off you are wrong.
With round off you are correct.
What reaction type is depicted by the following equation? 2C2H2 + 5O2 4CO2 + 2H2O decomposition combination combustion single-replacement double-replacement
combustion is when you burn something in presence e of oxygen and the products will be mainly the CO2 and H2O
Answer: The given reaction represents a combustion reaction.
Explanation:
Decomposition reaction is defined as the chemical reaction in which a single substance breaks down into two or more simpler substances.
[tex]AB\rightarrow A+B[/tex]
Combination reaction is defined as the reaction in which two or more smaller substances combine to form a single large substance.
[tex]A+B\rightarrow AB[/tex]
Combustion reaction is defined as the reaction in which a hydrocarbon reacts with oxygen gas to produce carbon dioxide and water.
[tex]C_xH_y+O_2\rightarrow CO_2+H_2O[/tex]
A double displacement reaction is defined as the reaction in which exchange of ions takes place.
[tex]AB+CD\rightarrow AD+CB[/tex]
A single displacement reaction is defined as the reaction in which a more reactive element displaces a less reactive element from its chemical reaction. The reactivity of metal is determined by a series known as reactivity series.
[tex]AB+C\rightarrow CB+A[/tex]
Metal C is more reactive than metal A.
For the given chemical reaction:
[tex]2C_2H_2+5O_2\rightarrow 4CO_2+2H_2O[/tex]
This is considered as a combustion reaction because ethene reacts with oxygen gas to produce carbon dioxide and water molecule.
What are the main specialized subunits of cells. They compartmentalize and make the cell work.
a. carbohydrates
b. proteins
c. organelles
d. amino acids
a i took this test yesterday.
Answer: Organelles
Explanation:
The cell organelles are the basic structure that is present inside every cell which helps the cell to perform its survival activities and processes.
The various types of organelles in the cell helps in performing various functions. Such as the mitochondria helps in the conversion of carbohydrates into adenosine triphosphate.
The Golgi body in the cell helps in the sorting and modification of proteins. It helps in the transport the secretion of the cells after modifications.
Hence, the correct answer is Organelles.
Which of the following acronyms does not represent a managed care plan? a. HMO b. PPO c. POS d. SOR
The answer would be SOR.
A managed care plan is a type of insurance for health and there are three types: HMO; PPO; and POS.
HMO stands for Health Maintenance Organizations. This type of plan pays for the care provided within the network.
PPO stands for Preferred Provider Organizations. Typically, pays bigger if within the network, but also pays out even if care was provided outside the network.
POS stands for Point of Service lets you choose between HMO or PPO for every time you need health services/care.
Answer:
The answer would be SOR
Explanation:
How would adding the catalyst nitrogen monoxide (NO) affect this reaction?
2SO2(g) + O2(g) → 2SO3(g)
A.
NO increases the rate at which SO3 molecules are formed.
B.
NO reacts with SO3 to produce more SO2 molecules.
C.
NO decreases collisions between the SO2 and O2 molecules.
D.
NO increases the concentration of the SO2 and O2 molecules.
E.
NO increases the activation energy of the SO2 and O2 molecules.
Answer: A. NO increases the rate at which [tex]SO_3[/tex] molecules are formed.
Explanation: The catalyst makes it possible for the reaction to take place by another path that makes possible reaction at a lower energy.
Activation energy is the extra energy that must be supplied to reactants in order to cross the energy barrier and thus convert to products.
A catalyst is a substance which increases the rate of a reaction by taking the reaction through a different path which involves lower activation energy and thus more reactants [tex](SO_2)[/tex] and [tex](O_2)[/tex] undergo collision and can cross the energy barrier and convert to products [tex](SO_3)[/tex]
Thus NO increases the rate at which [tex]SO_3[/tex] molecules are formed.
Answer:
The answer above is correct
A. NO increases the rate at which molecules are formed.
Explanation:
If Earth was like a hardboiled egg, which part of Earth would the eggshell represent and why?
Answer:
D. Crust, as its depth is less than 100 kilometers
Explanation:
Put the following molecules in order from least kinetic energy to greatest
Cool water
Frozen water
Warm water
Water vapor
Frozen water,cool water,warm water,water vapor.
Final answer:
The order from least to greatest kinetic energy of water in different states is frozen water (ice), cool water, warm water, and water vapor, in accordance with the kinetic molecular theory which relates temperature and phase of matter to kinetic energy.
Explanation:
To rank the different states of water according to their kinetic energy from least to greatest, we must understand that kinetic energy is related to the temperature and phase of matter. The kinetic molecular theory (KMT) explains that as the temperature increases, so does the kinetic energy of the molecules in a substance. Therefore, molecules in the solid phase (ice) have the least kinetic energy because they are at the lowest temperature, while molecules in the gaseous phase (water vapor) have the most kinetic energy due to the highest temperature.
Frozen water (Ice) - Solid state with the lowest kinetic energy.
Cool water - Higher kinetic energy than ice, as it is a liquid at a lower temperature.
Warm water - Even higher kinetic energy, as it is liquid at a higher temperature.
Water vapor - Gas state with the highest kinetic energy.
Thus, the correct order from least to greatest kinetic energy is: frozen water (ice), cool water, warm water, and water vapor.
2.822 mol of nickel has _________ atoms of nickel.
(Enter just the number for this one.)
Hello!
To find the number of atoms in 2.822 moles of nickel, we need to multiply it by Avogadro's number. Avogadro's number is 6.02 x 10^23 atoms.
2.822 moles x (6.02 x 10^23) ≈ 1.698844 x 10^24
Therefore, there are about 1.70 x 10^24 atoms (according to the number of significant figures) in 2.822 moles of nickel.
WILL MARK BRAINLIEST!!!
Which of the following is the electron configuration of an electrically neutral alkaline earth metal
A. 1s2 2s1
B. 1s2 2s2 2p2
C. 1s2 2s2 2p6 3s1
D. 1s2 2s2 2p6 3s2 3p6 4s2
I feel like the answer is D, but I’m not sure.
A) 1s2 2s1
The alkali metals have one lone outer S electron, because of this we can clearly see that the answer is 1s2 2s1
Answer:
1s2 2s2 2p6 3s2 3p6 4s2
crystals that can be toxic if inhaled and cause serious respiratory problems
why hello there
It depends of what kind of mineral you inhale if you inhale one of thease 9 you are in risk of dying
ChalcanthiteStibniteAsbestosArsenopyriteCinnabarGalenaHutchinsoniteOrpimentTorberniteIf my answer helped please mark me as brainliest thank you and have the best day ever!
Give an example of role of luck in bottenheims research
"You may find what you seek, or you might not" Is an excellent quote that might help.
"You may find what you seek, or you might not" Is an excellent quote that might help.
For the reaction C3H8 + O2 CO2 + H2O, match the proper coefficient to the chemical substance it goes with for a balanced reaction. A. 1 CO2 B. 5 O2 C. 3 C3H8 D. 4 H2O
Answer:
1: C3H8
5: O2
3: CO2
4: H2O
Explanation:
The balanced equation for the given reaction is C[tex]_3[/tex]H[tex]_8[/tex] + 5O[tex]_2[/tex] → 3CO[tex]_2[/tex]+4H[tex]_2[/tex]O. In other words, both mass and charge on the both side of the reaction are balanced.
What is balanced equation ?A balanced equation indeed a chemical reaction equation in which the overall charge and the amount of atoms for every element inside the reaction are the same for both the products and reactants. In other words, both mass and charge on the both side of the reaction are balanced.
An imbalanced chemical equation describes the products and reactants of a chemical reaction however does not include the quantities needed to meet mass conservation. The balanced equation for the given reaction is C[tex]_3[/tex]H[tex]_8[/tex] + 5O[tex]_2[/tex] → 3CO[tex]_2[/tex]+4H[tex]_2[/tex]O.
Therefore, the balanced equation for the given reaction is C[tex]_3[/tex]H[tex]_8[/tex] + 5O[tex]_2[/tex] → 3CO[tex]_2[/tex]+4H[tex]_2[/tex]O.
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Which time is equivalent to 3 years?
A.
9.4 × 107s
B.
1.6 × 106s
C.
3.0 × 107s
D.
6.3 × 106s
Which antibody does the body release when it identifies a bacterium or virus?
When the body identifies a bacterium or a virus, it releases the antibody ____.
Explanation:
Immunoglobulin M is the first antibody produced on initial exposure to an antigen. It is also known as IgM.
It occurs as a primary response to the antigens against a particular baterium or virus. It is pentavalent in nature and has ten binding sites for antigens.
Therefore, it is concluded that when the body identifies a bacterium or a virus, it releases the antibody IgM.
Answer:
The first immunoglobulin to arrive is M, IgM
Explanation:
Immunoglobulins are the molecules that intervene in defense against microorganisms, foreign cells and against substances that can cause allergies. They are also known as antibodies. IgM is specific and is the first antibody that appears in primary infections, so its value and quantity is very important to diagnose an infection.
On the basis of electronegativity, which of these pairs of elements is most likely to form polyatomic ions?
Question 1 options:
O and P
Na and Br
Cs and Cl
Ba and O
Question 2
Which of the following pairs of elements would most likely combine to form a salt?
Question 2 options:
Na and C
Cs and I
I and F
N and F
Question 3
Which of the following substances best conducts electricity in an aqueous solution?
Question 3 options:
CO 2
CH 3OH
H 2O
KCl
Question 4
Which of the following rules would apply to the naming of CaCl2?
Question 4 options:
metal cation + nonmetal anion(–ide)
metal cation + (roman numeral valence) + nonmetal anion(–ide)
metal + polyatomic anion
polyatomic cation + nonmetal anion(–ide)
Question 5
A salt forms in the reaction of aluminum with chlorine. What is the most likely formula unit of this salt?
Question 5 options:
AlCl
AlCl 3
AlCl 2
Al 3Cl
Question 6
In a Lewis diagram for methane (CH 4), which atom or atoms is inside, or central?
Question 6 options:
hydrogen
neither, carbon and hydrogen are both inside
carbon
neither, carbon and hydrogen are both outside
Question 7
On the basis of bonding, which of the following is true about sodium chloride when compared to sucrose?
Question 7 options:
Sodium chloride dissolves in water, but sucrose does not.
Sodium chloride has a lower melting point than sucrose.
Sodium chloride has a higher boiling point than sucrose.
Sodium chloride crystals are softer than sucrose crystals.
Question 8
Which of the following is true about the compound ammonium phosphate [(NH 4) 3PO 4]?
Question 8 options:
It is a mixture of two monatomic nitrogen and hydrogen ions and one polyatomic phosphate ion.
It is a salt of three polyatomic ammonium ions and one polyatomic phosphate ion.
It is a mixture of three polyatomic ammonium ions and two polyatomic phosphate ions.
It is a salt of monatomic nitrogen, hydrogen, phosphorus, and oxygen ions.
Question 9
Which of these pairs of elements is most likely to be part of a polyatomic ion?
Question 9 options:
K and F
Mg and Br
l i and i
S and O
Question 10
What is the correct name of the compound Mn 3(PO 4) 2?
Question 10 options:
manganese(II) phosphate
manganese(III) phosphate
manganese(I) phosphate
manganese phosphate
1) Answer is: O and P.
Electronegativity is a chemical property that describes the tendency of an atom to attract a shared pair of electrons towards itself.
Oxygen (O) has greater electronegativity than phosphorus (P), because of that oxygen is partially negative and phosporus is partially positive.
Polyatomic ion is for example a molecule that has been ionized by gaining or losing electrons.
Oxygen and phosphorus can form ion PO₄³⁻.
2) Answer is: Cs and I.
Cesium (Cs) and iodine form salt cesium iodide (CsI) with ionic bond.
Ionic bond is the electrostatic attraction between oppositely charged ions (cations and anions).
Cesium (metal) lost one electron and form cation Cs⁺; iodine (nonmetal) gain one electron and form anion I⁻.
3) Answer is: KCl.
Potassium chloride is a salt with ionic bond.
Substances with ionic bond conduct an electric current in liquid and aqueous solutions, but not in solid state, because in liquids ions are mobile, contrary to solids where ions are fixed.
Dissociation of potassium chloride in water: KCl(aq) → K⁺(aq) + Cl⁻(aq).
4) Answer is: metal cation + nonmetal anion(–ide).
Name of this compound is calcium chloride.
Calcium chloride is a inorganic salt with ionic bonds between calcium and chlorine. It is a colorless crystalline solid at room temperature, highly soluble in water.
Calcium has oxidation number +2 and chlorine has oxidation number -2.
5) Answer is: AlCl₃.
Balanced chemical reaction: 2Al(s) + 3Cl₂(g) → 2AlCl₃(s).
Aluminium chloride is a salt with ionic bonds.
Aluminium (metal from group 13) has oxidation number +3 and chlorine (nonmetal from group 17) has oxidation number -1, chemical compound has neutral charge (+3 + 3 · (-1) = 0).
6) Answer is: carbon.
In molecule of methane (CH₄) all the atoms around the central element (carbon) are equivalent (four hydrogens) and it has a net dipole moment of 0 (vectors of dipole moments cancel each other, dipole moment is zero).
Methane (CH₄) is gaseous molecule with tetrahedrale structure, carbon is sp3 hybridized.
7) Answer is: Sodium chloride has a higher boiling point than sucrose.
Sodium chloride (NaCl) has ionic bonds and sucrose (C₁₂O₂₂O₁₁) has covalent bonds.
Sucrose or table sugar (C₁₂O₂₂O₁₁) composed of two monosaccharides. Monosaccharides glucose and fructose are linked with an ether bond between C1 on the glucosyl subunit and C2 on the fructosyl unit.
Boiling point of sodium chloride is 1413°C and sucrose decomposes at 186°C and form caramel.
8) Answer is: It is a salt of three polyatomic ammonium ions and one polyatomic phosphate ion.
Polyatomic ammonium cation has charge of +1 and polyatomic phosphate anion has charge -3.
Ammounium ion is polyatomic because it is composed of one nitrogen and four hydrogen atoms.
Phospate anion is polyatomic because it is composed of one phosphorus and four oxygen atoms.
9) Answer is: S and O.
Electronegativity is a chemical property that describes the tendency of an atom to attract a shared pair of electrons towards itself.
Oxygen (O) has greater electronegativity than sulfur (S), oxygen is partially negative and sulfur is partially positive.
Sulfur and oxygen can form, for example, SO₃²⁻ (sulfite anion) or SO₄²⁻ (sulfate anion).
10) Answer is: manganese(II) phosphate.
Manganese (II) phosphate (Mn₃(PO₄)₂) is an ionic salt.
Manganese has oxidation number +2 and phosphate has charge -3.
3 · (+2) + 2 · (-3) = 0; chemical compound has neutral charge.
Formula for manganese(III) phosphate is MnPO₄.
Formula for manganese(I) phosphate is Mn₃PO₄.
Which atom or ion is the largest?
A.
K
B.
K+
C.
Ca
D.
Ca2+
E.
Li
i think its either C or E
The elements beryllium, calcium, and strontium are all in group 2. What is the correct relationship of these elements regarding their ionization energy?
A.
Ca < Be < Sr
B.
Sr < Be < Ca
C.
Be < Ca < Sr
D.
Sr < Ca < Be
E.
Ca < Sr < Be
Which substances are made up of polymers?(PICK MORE THEN ONE YALL)
DNA
a glass bottle
ice crystals
the proteins in hair
rubber car tires
Size
As the charge increases (becomes more positive), the size decreases.
Also the number of protons and electrons matters in the atom itself. Li will have the smallest size because their are not that many electrons to repulse as say the Ca and K.
The largest member of that group is the one having the most number of electrons and is not an ion. In general the higher the charge, the smaller the radius.
K > K+ > Ca2+
Answer: A
Ionization Energy
As you go down the periodic table staying in the same column of the periodic table it takes LESS energy to break the outer shell electrons away. So the correct order for the column II elements is something like D.
Be is closest to the top of the periodic table and has the highest ionization energy
Ca is the next closest to the top and has a medium size ionization energy
Sr has the lowest ionization energy.
Answer C is backwards.
Answers A B and E are all in the wrong order of moving down Column II. The comment applies to staying in the same column and moving from top to bottom.
Polymers
A polymer is a complex combination of Carbon, Hydrogen and Oxygen (mainly). Other elements are possible but the majority is the listed ones.
DNA is a polymer
A glass bottle is made from SiO2 and is not a polymer
Ice crystals are actually water molecules. Those crystals are not polymers
Hair Proteins (like wool and silk) are made of polymers.
Rubber used for car tires are polymers.
You should count 3 items as your answer.
Answer:
AK
Explanation:
Think about the lab procedure you just read. Label each factor below with V for “variable” or C for “constant”.
The temperature of the gas:
The amount of gas in the tube (in terms of mass and moles):
The radius of the tube:
The temperature of the gas (changed by the water surrounding it):
The type of gas:
The pressure of the gas:
Answer:
answer in picture
Explanation:
Each factor listed is classified as either a variable or constant based on how it is treated in gas behavior experiments, which helps in understanding the ideal gas law.
Explanation:When considering the lab procedure related to the behavior of gases, we can label each factor with 'V' for variable or 'C' for constant, based on the information provided about gas laws.
Early scientists studied the relationship between gas variables, holding some factors constant while varying others to observe the effects on gas behavior—this concept is crucial in understanding the ideal gas law and gas properties.
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Hello can somone help me ?
Copper has an atomic number of 29.
That means that there are 29 protons in the nucleus of each copper atom. That's what the atomic number is; the number of protons in an atom of a certain element.
if one copper atom contains 29 protons, how many ELECTIONS are there in in 4 atoms of copper?
There are 116 electrons in four atoms of Cu.
A Cu atom contains 29 protons, so it also contains 29 electrons.
[tex]\text{No. of electrons } = \text{ 4 Cu atoms } \times \frac{\text{29 electrons}}{\text{1 Cu atom }} = \text{ 116 electrons }\\[/tex]
Calculate the volume mL A cube that is 2.20 cm on
The volume of the cube in mL is 10.684 mL
We know that the volume of a cube with length of sides L is V = L³
Since the length of side of our cube is 2.20 cm, its volume V = L³ = (2.20 cm)³ = 10.648 cm³.
Since 1 dm³ = 1 liter and 1000 cm³ = 1 dm³, we convert the volume of the cube to dm³.
So, 10.684 cm³ = 10.684 cm³ × 1 dm³/1000 cm³ = 0.010684 dm³
Since 1 dm³ = 1 L,
0.010684 dm³ = 0.010684 L
We now convert this volume of the cube to milliliter(mL)
Since 1000 mL = 1 L.
0.010684 L = 0.010684 × 1 L = 0.010684 × 1000 mL = 10.684 mL
So, the volume of the cube in mL is 10.684 mL
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Which of the following correctly explains how air exerts pressure on us?
The molecules in the air located above us are pulled down towards the Earth by gravity, causing a downward pressure on objects below.
The normal force produced by the Earth against our bodies causes the air to be pressurized.
The difference in the amount of air outside and the amount inside of our bodies creates air pressure.
The strength of molecular bonds between air molecules is greater than the strength of bonds between molecules in our bodies, creating pressure.
The correct explanation of how air exerts pressure on us is:
The molecules in the air located above us are pulled down towards the Earth by gravity, causing a downward pressure on objects below.
Numerous molecules that make up air are constantly moving. These air molecules are drawn downward toward the Earth's surface by the gravity of the planet. Because of this, the air above us has a weight that presses down on everything below it, including our bodies. Atmospheric pressure is the name given to this occurrence.
The other possibilities are not accurate ways to explain how air presses on us. The Earth's natural force acting on our bodies does not immediately pressurize the air. Our bodies' internal pressure regulation, not the air's outward pressure, is what determines how much air is present outside and inside of us. Moreover, the strength of the chemical connections that connect air molecules to our body's molecules is not directly relevant to how air pressure is exerted on us.
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