Answer:
True
Explanation:
An orbital is is the space occupied by a pair of electrons. The maximum number of electrons in an orbital is 2.
The maximum number of electrons in in the orbitals are two.
For s-sublevel with one orbital we have two electrons
p-sublevel with three orbitals we have six electrons
d - sublevel with five orbitals we have ten electrons
f - sublevel with seven orbitals we have fourteen electrons
Each orbital can take a maximum of two electrons.
The specific branch of chemistry that focuses on molecules such as salts and water that constitute non-living matter, but are still important to living things, is termed
Answer: Inorganic chemistry
Explanation:
Inorganic chemistry can be defined as the branch of chemistry which studies the behavior of the inorganic compounds. Inorganic compounds are those compounds which lack carbon hydrogen bonding. The carbon monoxide, carbon dioxide, sodium chloride and water are the examples of inorganic compounds. This branch also studies the effect of these chemical compounds on the living things. The water and salts are chemicals which regulate the chemical and physiological reactions in the body.
A player from team A was awarded two free throws. On the first attempt, he released the ball with a velocity of 6.0m/s at 45* above the horizontal from the height of 2.0 m from the floor. (a) Is this a miss? (b) For the second attempt, the player shoots at 45* from the same point. What must be the initial speed of the ball so that it will go through the basket? The basket is 4.21 m from the free throw line and 3.05 m above the floor.
heeellppp meee pleassee...T^T
Answer:
a)
Hmax=v2sin2452g+hH_{max}=\frac{v^2\sin^2{45}}{2g}+hHmax=2gv2sin245+h
Hmax=2+62sin2452(9.81)=2.92 mH_{max}=2+\frac{6^2\sin^2{45}}{2(9.81)}=2.92\ mHmax=2+2(9.81)62sin245=2.92 m
It is less than the height of the basket of 3.05 m. So, this is a miss.
b)
d=R=v2sin(2⋅45)g=v2gd=R=\frac{v^2\sin{(2\cdot45)}}{g}=\frac{v^2}{g}d=R=gv2sin(2⋅45)=gv2
4.21=v29.814.21=\frac{v^2}{9.81}4.21=9.81v2
v=6.43msv=6.43\frac{m}{s}v=6.43sm
4.Calculate the volume of 40g of Helium (He) at rtp.
Answer:
2.24dm³
Explanation:
Given parameters:
Mass of He = 40g
Unknown:
Volume of Helium = ?
Solution:
To solve this problem, we convert the given mass to number of moles.
Number of moles = [tex]\frac{mass}{molar mass}[/tex]
molar mass of He = 4g/mol
Number of moles = [tex]\frac{4}{40}[/tex] = 0.1mole
So;
1 mole of gas at rtp occupies a volume of 22.4dm³
0.1 mole of He will occupy a volume of 0.1 x 22.4 = 2.24dm³
Spring ends on what day?
summer solstice
winter solstice
vernal equinox
autumnal equinox
Answer:
June 20
Explanation:
16. Put the following pairs in order from least polar to most polar:
a. C-H N-H H-O H-F
b. C-H
C-S
H-F
C-N
C-O
H-Br
i.
Which pair in part b has the most electronegative bond? Least electronegative bond?
17. Explain how you could use the electronegativity scale to determine the direction and degree of
polarity between two atoms. (Direction meaning which way does the dipole arrow point)
Answer:
I think A does because there are so many letters in their so a
_Li + __F2 → _LIF
How do I balance this?
Answer:
2Li + F₂ → 2LiF
Explanation:
The reaction expression is given as:
Li + F₂ → LiF
We are to balance the expression. In that case, the number of atoms on both sides of the expression must be the same.
Let use a mathematical approach to solve this problem;
Assign variables a,b and c as the coefficients that will balance the expression:
aLi + bF₂ → cLiF
Conserving Li: a = c
F: 2b = c
let a = 1, c = 1 and b = [tex]\frac{1}{2}[/tex]
Multiply through by 2;
a = 2, b = 1 and c = 2
2Li + F₂ → 2LiF
What is one effect of the Gulf Stream
Answer:
This strong current of warm water influences the climate of the east coast of Florida, keeping temperatures there warmer in the winter and cooler in the summer than the other southeastern states. Since the Gulf Stream also extends toward Europe, it warms western European countries as well.
Answer:
warm climates in northern Europe
Explanation:
I took the test in K12 and this was the answer :)
Question 1
Which words in the passage help the reader understand the meaning of the word avid in the first paragraph?
A. What he found out
B. Many hours gardening
C.the curious and observant
D.he noticed
What part of a potential energy diagram reveals the enthalpy of reaction?
A. The difference in energy between the activation energy and the
products
B. The difference in potential energy between the reactants and
products
C. The difference in energy between the reactants and the activation
energy
D. The potential energy of the reactants plus the potential energy of
the products
Answer:
The difference in potential energy between the reactants and products
Explanation:
The difference in potential energy between the reactants and products reveals the enthalpy of reaction, hence option B is correct.
What is enthalpy of a reaction?The change in the enthalpy of a chemical reaction that takes place at constant pressure is known as the heat of reaction also known as the enthalpy of reaction. It is a unit of measurement for thermodynamics.
In a thermodynamic system, energy is measured by enthalpy. Enthalpy is a measure of a system's overall heat content and is equal to the system's internal energy plus the sum of its volume and pressure.
The difference between total product and total reactant molar enthalpies, computed for substances in their standard states, is the standard enthalpy of reaction for a chemical reaction.
Therefore, the difference in potential energy between the reactants and products reveals the enthalpy of reaction, hence option B is correct.
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Please help me answer this question but in your own words!!!!
Answer:
when sodium reacts with chlorine atoms, sodium will give an electron which is negative charged to chlorine.it makes sodium(+) and chlorine (-)..then sodium will attract chlorine to form sodium chloride(NaCl)
Workout the formula for:
Magnesium Bromide
Potassium Chloride
Help me asap pls man
Answer:
C
Explanation:
A p orbital has the approximate shape of a pair of lobes on opposite sides of the nucleus.
Explanation:
A p orbital would have a du-bbell shape.
Options A and B show a spherical shape, which are for s orbitals.
Option D shows a double du-bbell / clover leaf shape, which is for d orbitals.
The answer is Option C.
P.S. The word is censored apparently, so be forgiving! Thanks~
Calculate the concentration of 10g of magnesium chloride in 1dm3 of solution.
Answer:
0.105 mol/dm³
Explanation:
From the question given above, the following data were obtained:
Mass of MgCl₂ = 10 g
Volume of solution = 1 dm³
Concentration of MgCl₂ =?
Next, we shall determine the number of mole present in 10 g of MgCl₂. This can be obtained as follow:
Mass of MgCl₂ = 10 g
Molar mass of MgCl₂ = 24 + (2 ×35.5)
= 24 + 71
= 95 g/mol
Mole of MgCl₂ =?
Mole = mass /Molar mass
Mole of MgCl₂ = 10 / 95
Mole of MgCl₂ = 0.105 mole
Finally, we shall determine the concentration of MgCl₂. This can be obtained as follow:
Mole of MgCl₂ = 0.105 mole
Volume of solution = 1 dm³
Concentration of MgCl₂ =?
Concentration = mole / Volume
Concentration of MgCl₂ = 0.105 / 1
Concentration of MgCl₂ = 0.105 mol/dm³
Concentration is [tex]0.105\ mol/dm^{3}[/tex]
Given:-
Mass of MgCl₂ = 10 g
Volume of solution = [tex]1\ dm^{3}[/tex]
Concentration of MgCl₂ =?
[tex]Molar mass of MgCl_2 = 24 + (2\times35.5)\\= 24 + 71\\= 95 g/mol[/tex]
Mole of MgCl₂ =?
The number of moles is calculated by the equation as follows:-
[tex]Mole = mass /Molar massMole of MgCl_2= 10 / 95Mole of MgCl_2 = 0.105 mole[/tex]
Determine the concentration of [tex]MgCl_2[/tex] as follows:-
Mole of MgCl₂ = 0.105 mole
Volume of solution = 1 dm³
Concentration of MgCl₂ =?
[tex]Concentration = mole / Volume\\Concentration\ of\ MgCl_2 = 0.105 / 1\\Concentration \ of\ MgCl_2= 0.105 mol/dm^{3}[/tex]
Hence the concentration of 10g of magnesium chloride is [tex]0.105 mol/dm^{3}[/tex].
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The total pressure in a flask containing only hydrogen and helium is 580 mmHg. If hydrogen accounts for 70% of the pressure and helium contributes 30% of the pressure, what is the partial pressure of the hydrogen gas?
A) 406 mmHg
B) 510 mmHg
C) 174 mmHg
D) 83 mmHg
Answer:
Answer choice c = 174
Explanation:
If you divide 30% into 580 you get 174. You can also check your work by doing 580 divided by 70%
30% divided by 580 = 174
Which of the following best describes metallic bonding?
Answer:
D.the metal atom use their positive charges to gain additional electrons until every atom has eight valence electrons.
The statement which best describes the metallic bonding is (B). The valence electrons between the metals become decoalized and can move freely between the metallic cations.Hence the correct option is (B).
What is Metallic Bonding ?Chemical bonds known as metallic bonds are produced by the electrostatic attraction of positively charged metal ions and conduction electrons.
A structure of positively charged ions may be thought of as sharing free electrons.
Atoms in a metallic substance are held together by a force called the metallic bond. Atoms in such a solid are packed closely together. Each metal atom's outermost electron shell typically overlaps with a significant number of its nearby neighbors.
Therefore, The statement which best describes the metallic bonding is (B). The valence electrons between the metals become decoalized and can move freely between the metallic cations.Hence the correct option is (B).
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15.A mixture of methane and oxygen gases, in a 8.77 L flask at 80 °C, contains 3.25 grams of methane and 4.08 grams of oxygen. The partial pressure of oxygen in the flask is _____
atm and the total pressure in the flask is ______
atm.
Submit Answer
Answer:
Partial pressure of oxygen = 0.43 atm
Total pressure = 1.0 atm
Explanation:
Given data:
Volume of flask = 8.77 L
Temperature = 80°C (80 + 273.15 K = 353.15 K)
Mass of methane = 3.25 g
Mass of oxygen = 4.08 g
Partial pressure of oxygen = ?
Total pressure = ?
Solution:
Number of moles of methane:
Number of moles = mass/molar mass
Number of moles = 3.25 g/ 16 g/mol
Number of moles = 0.2 mol
Number of moles of oxygen:
Number of moles = mass/molar mass
Number of moles = 4.08 g/ 32 g/mol
Number of moles = 0.13 mol
Total number of moles in flask = 0.13 mol + 0.2 mol = 0.33 mol
Pressure of oxygen:
PV = nRT
R = general gas constant = 0.0821 atm.L/mol.K
P ×8.77 L = 0.13 mol × 0.0821 atm.L/mol.K × 353.15 K
P = 3.77atm.L /8.77 L
P = 0.43 atm
Pressure of flask:
PV = nRT
R = general gas constant = 0.0821 atm.L/mol.K
P ×8.77 L = 0.33 mol × 0.0821 atm.L/mol.K × 353.15 K
P = 8.75atm.L /8.77 L
P = 1.0 atm
a. glycerol
b. propane
c. alkene
d. amino acid
e. isopropanol
f. ring structure
g. alkyne
h. ethylene glycol
i. ester
j. organic acid
1. shape of aromatic hydrocarbons ___.
2. an alcohol with two hydroxyl groups ____.
3. molecule formed when a carboxylgroup replaces a hydrogen in a hydrocarbon __.
4. unsaturated hydrocarbon with at least one double bond ___.
5. example of a saturated hydrocarbon __.
6. molecule in which the —NH, radical replaces a hydrogen in a hydro-carbon __.
7. substance that forms when anorganic acid reacts with an alcohol __.
8. rubbing alcohol __.
9. an alcohol with three hydroxyl groups __.
10. hydrocarbon with at least one triple bond between carbon atoms __.
What is the most complete answer below about the information, found about the element uranium in the periodic table
Answer:
92 is that atomic number and 238.03 is the atomic mass number
Explanation:
The structure of the atom is given as:
⁹²₂₃₈.₀₃U
The number 92 is the atomic number of the atom.
The atomic number is the number of protons within an atom. This number defines the nature and type of atom that we have.
238.03 is the atomic mass number;
The is the number of protons and neutrons within an atom. It is typically the mass of nucleus.
Select the correct answer. Which element is the most reactive nonmetal? A. sulfur (S) B. phosphorus (P) C. nitrogen (N) D. fluorine (F) E. bromine (Br) Reset
Answer:
FLUORINE
The most reactive nonmetal is fluorine. Fluorine is a halogen, which is Group 17 on the periodic table, and the halogens are the most reactive nonmetals. This is because they all have one empty space in their valence electron shells.
Explanation:
C6H12O6 + 6O2 + 38ADP + 38Pi => 6CO2 + 6H2O + 38ATP is the chemical equation for
Answer:
C6H12O6 + 6O2 + 38ADP + 38Pi => 6CO2 + 6H2O + 38ATP is the chemical equation for cellular respiration
Explanation:
Cellular respiration is the process by which cells breakdown glucose molecules to produce energy in the form of ATP molecules and release waste products such as carbon dioxide and water molecules. Cellular respiration involves a series of reaction pathways such as glycolysis, pyruvate oxidation, citric acid cycle and the oxidative phosphorylation pathway.
The first step of glycolysis breaks down a glucose molecule to release two pyruvate molecules.
In pyruvate oxidation, two molecules of pyruvate are oxidized to acetyl-CoA molecules.
In the citric acid cycle, the acetyl-CoA molecules are used to produce the electron carriers NADH and FADH2.
In the oxidative phosphorylation pathway, NADH and FADH2 donate their electrons to oxygen and ATP molecules are produced using the energy of electron transfer and proton-pumping.
The overall equation for cellular respiration is given as:
C6H12O6 + 6O2 + 38ADP + 38Pi => 6CO2 + 6H2O + 38ATP
Oceans, and other bodies of water, are found on which layer of Earth?
Outer core
Mantle
Inner core
Crust
they are found on the crust
Answer:
crust
Explanation:
which atomic particles have no charge?
Answer:
the answer is neutron :)))))))))
Dry ice changes from a solid directly into a gas at room temperature. Sublimation is the transition of a substance directly from the solid to the gas phase without passing through an intermediate liquid phase. What does sublimation demonstrate
Answer:
The process in which a solid changes directly to a gas is called sublimation. It occurs when the particles of a solid absorb enough energy to completely overcome the force of attraction between them. Dry ice (solid carbon dioxide, CO2) is an example of a solid that undergoes sublimation.
Lori argues that atoms are not living, what cell theory example is this? Please help thank you
Answer:
No (I edited it because some people were confused )
Explanation:
In this way, cells are different from atoms and molecules. Atoms are not living things; they do not need food, water, and air; and they do not reproduce themselves. Cells are alive. Cells are bigger than atoms.
To see the number of atoms of an element in a given molecule we need to multiply stoichiometry to the number that is written on the foot of the element that is stoichiometry. Therefore, atoms are basic building block of any matter. Cells are building block of any living organism.
What is atom?Atom is the smallest particle of any element, molecule or compound. Atom can not be further divided. Atoms contains nucleus in its center and electron that revolve around the atom in fixed orbit.
In the nucleus, proton and neutron are present. Electron has -1 charge while proton has +1 charge. Neutron is neutral that is it has no charge. So overall the charge of nucleus is due to only proton, not by neutron. Atoms are basic building block of any matter. Cells are building block of any living organism.
Therefore, atoms are basic building block of any matter. Cells are building block of any living organism.
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The number of covalent bonds that an
In a covalent bond, two atoms are held together by the attraction between
atom can form depends on the number of
in the atom.
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3:21 PM
1/20/2021
Answer: please make the question more understandable
Explanation:
6.
Tristan completed a lab that combusted 5.0 grams of sodium
Write a complete balanced equation for the combustion of sodium.
a
b. What is the maximum amount of product that Tristan can obtain in this lab?
Answer:
4Na + O₂ → 2Na₂O
6.82g
Explanation:
The combustion of sodium involves combining the element with oxygen gas:
4Na + O₂ → 2Na₂O
We have been given 5g of Na.
The balanced reaction equation is given as shown above. This reaction is also a synthesis or combination reaction.
b. Maximum amount of product that can be obtained.
Sodium is the limiting reactant and it will determine the amount of product that can be formed.
To solve this, we find the number of moles of the given sodium.
Mass of given sodium = 5g
Molar mass of Na = 23g/mol
Number of moles of Na = [tex]\frac{mass}{molar mass}[/tex]
Insert the parameters and solve;
Number of moles of Na = [tex]\frac{5}{23}[/tex] = 0.217moles
From the balanced reaction equation:
4 moles of Na will produce 2 moles of Na₂O
0.217 moles of Na will produce [tex]\frac{0.217 x 2}{4}[/tex] = 0.11mole of Na₂O
So;
Mass of Na₂O = number of moles x molar mass
Molar mass of Na₂O = 2(23) + 16 = 62g/mol
Mass of Na₂O = 0.11 x 62 = 6.82g
I have this question in science so someone please help me
I would say C.) It has been updated and modified based on the new data
What is a disadvantage of using solar energy?
Help
Answer:
D, last one.
Explanation:
In order to use solar energy, we need solar panels. Which we need sun for it to heat up, and once there is the sun. The heat can hit the water, and cause the water to burn/boil
PLEASEEEE HELPPP ME WITH THISS
A person riding in the passenger seat of a car is "pushed" into the car door as the car makes a sharp left turn.
Newton's 2nd Law
Newton's 1st Law
Newtons 3rd Law
Answer:
second law
Explanation:
Beginning with hydrogen how do the chemical elements form?