Answer:
0.49903 mol
Explanation:
Please help!!!!!!!!!!!!
Answer:
Explanation:
Atomic number = 8
Electron = 8
1s level= 2
2nd level = 6
3rd level =0
Hope this help
[tex]\huge\underline\mathbb\pink{ANSWER\::}\\\\[/tex]
Atomic Number : 8
Total number of electron : 8
1st level Electrons : 2
2nd level Electrons : 6
3rd level Electrons : 0
[tex]\\\\\\[/tex]
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300.0 mL of a gas is at a pressure of 5.00 atm. What is the volume of the gas at 2.00 atm?
A. 500 ml
B. 100 mL
C. 750 mL
D. 250 mL
Identify the fact that is FALSE about the law of conservation of energy?
Answer:
What are the options?
Explanation:
......
A 20.0 L container at 303 K holds a mixture of two gases with a total pressure of 5.00 atm. If there are 2.00 mol of Gas A in the mixture, how many moles of Gas B are present?
Calculate the mass, in grams, of 0.433 mol of CO2
When a solution of cesium chloride (CsCl) is subjected to high-speed centrifugation, a stable density gradient is formed. Meselson and Stahl found that when cell contents were subjected to centrifugation with a CsCl solution, a band of DNA formed at the CsCl density that matched the density of the DNA. This technique is called density-gradient centrifugation.
a. True
b. False
Answer:
True
Explanation:
Messelson and strahl explain the semiconservative existence of DNA replication by using CsCl gradient centrifugation. The hardest would go and rest at the base of the test tube, while the lightest would be at the top, the lightest would find a position between the heavy and the lightest. When the heavy tube is centralized, from a pool of light, bulky and moderate DNA.
This technique is called density-gradient centrifugation. Hence, the given statement is true.
What is the correct answer? Please
Answer:
Latitude
ocean currents
Wind
Elevation
Water
Help I’m timed!
What do planets mercury and Venus have in common. Gas surface composition with no rings or Moon’s gas service composition with rings and moon rocks surface composition with no rings or moon rock surface composition with rings and moons?
Answer: i could be incorrect but im pretty sure the answer is, Gas surface with no rings.
Explanation:
s-s-s-science!
Answer:
Gas surface with no rings.
Explanation:
A self-aldol or crossed aldol reaction REQUIRES a(n) ___________________. Group of answer choices strong acid only a very, very strong base, such as LDA (lithium diisopropyl amide), NaOH or LiOH won't work acid catalyst a strong base such as LiOH or NaOH
Answer:
[tex]\mathbf{a \ strong \ base \ such \ as\ LiOH \ or \ NaOH.}[/tex]
Explanation:
In the condensation reactions of carbonyl compounds, it is essential to establish the order of events in advance to minimize or suppress the possibilities of self-condensation and the occurrence of cross-condensation, which unfortunately are an obvious threat in these reactions.
Self-condensation:
Any carbonyl compound that has one or more alpha hydrogens, on the carbons adjacent to the carbonyl group, runs the risk of undergoing a self-condensation reaction if the corresponding rigor is not carried out.
Cross-condensation:
Ideally, in the condensation reactions of carbonyl compounds, one of the reacting molecules should quickly enolise, while the other preferably should not have Hα, to ensure that no other by-products are formed.
[tex]\text{To achieve this process;}[/tex] [tex]\text{A self-aldol or crossed aldol requires a strong base such as LiOH or NaOH.}[/tex]
What is the formula for tetracarbon difluorine octabromide?
Answer: The formula for tetracarbon difluorine octabromide is [tex]C_4F_2Br_8[/tex]
Explanation:
The naming of covalent compound is given by:
The less electronegative element is written first.
The more electronegative element is written second. Then a suffix is added with it. The suffix added is '-ide'.
If atoms of an element is greater than 1, then prefixes are added which are 'mono' for 1 atom, 'di' for 2 atoms, 'tri' for 3 atoms and so on.
Hence, the correct formula for tetracarbon difluorine octabromide is [tex]C_4F_2Br_8[/tex]
You can calculate distance from work and force with the equation
Answer:
Summary. Work can be calculated with the equation: Work = Force × Distance. The SI unit for work is the joule (J), or Newton • meter (N • m).
Explanation:
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Distance is the measure of how far or near an object is placed. It can be referred to as the length between the two points. The distance can be calculated by the formula, [tex]\rm Work = Force \times Distance.[/tex]
What are work and force?Work is the amount of force or energy required by the system to move the thing or the object from its original position to another. It is estimated in joules.
Force is the strength or the power required by the object to change its motion. It is calculated in Newtons.
The distance can be measured by using the work and the force applied by the object to move from initial to the final position as,
[tex]\rm Work = Force \times Distance[/tex]
Therefore, distance can be calculated by work and force.
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1. Fill in the best answer for each of the following: a) ________________________ is the capacity to do work or to supply heat. b) ________________________ is energy stored within a substance due to its chemical composition. c) A reaction that absorbs energy is called a(n) ________________________ reaction. d) The __________________________________ says that in any chemical or physical change, energy can neither be created nor destroyed, only changed in form. e) Thermochemistry is the study of ________________________ that occur during chemical and physical changes.
Answer:
A. Energy
B. Chemical potential
C. Endothermic reaction
D.The law of conservation of mass
E. Transfers of energy
The fill in the blanks for energy, reaction, and the law of mass is
A. Energy
B. Chemical potential
C. Endothermic reaction
D. The law of conservation of mass.
E. Transfers of energy
What is the law of conservation of mass?The law says that energy can neither be created nor destroyed.
The law was given by Antoine Lavoisier.
Thus, fill in the blanks are: A. Energy
B. Chemical potential
C. Endothermic reaction
D. The law of conservation of mass.
E. Transfers of energy
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what are causes of students to drop-out from university
Answer:
stress
Explanation:
people cn get stressed and not want to do work
PLEASE HELPPPPPPPPPPPPPP
1. Why do magnets repel each other?
2. Why do magnets attract some metal objects?
3. What happens if a magnet breaks in ½?
4. How do you make a piece of metal magnetic?
Please please help
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Which explains how the nervous system is typically involved in keeping the body in homeostasis?
It processes the environment and sends out signals.
It controls movement and provides structure.
It physically breaks down and absorbs food.
It puts oxygen in the blood, which is essential for life.
Answer:
Explanation:
It processes the environment and sends out signals.
What does the subscript tell you?
A. the number of elements in a formula
B. the number of atoms of each element in a formula
C. the number you multiply the compound by
D. none of these
Give me some examples of why is it important to understand how ocean currents flow.
Answer:
By moving heat from the equator toward the poles, ocean currents play an important role in controlling the climate. Ocean currents are also critically important to sea life. They carry nutrients and food to organisms that live permanently attached in one place, and carry reproductive cells and ocean life to new places.
Explanation:
:)
A(n) ____________ is a push or a pull.
newton
acceleration
force
momentum
Simplifying the expression 3y-4y+3y gives:
Answer:
the answer is 2y!
Explanation:
3y+3y =6y -4y = 2y
salt in soap make the soap stronger
Answer:
yes correct salt hardens soap
Calculate the precise Molar Mass of NH3 and calculate the moles in 50.0
grams.
Answer: Molar mass of [tex]NH_3[/tex] is 17.00 g and moles in 50.0 grams is 2.94.
Explanation:
Molar mass is defined as the mass in grams of 1 mole of a substance.
S.I Unit of Molar mass is gram per mole and it is represented as g/mol.
Atomic Mass of Nitrogen (N) = 14.00 g
Atomic Mass of Hydrogen (H) = 1.00 g
Molar mass of [tex]NH_3[/tex] = 1(14.00)+3(1.00) g = 17.00 g
According to avogadro's law, 1 mole of every substance contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles and weigh equal to its molecular mass.
To calculate the moles, we use the equation:
[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}[/tex]
[tex]\text{Number of moles of }NH_3==\frac{50.0g}{17.00g/mol}=2.94moles[/tex]
How many moles are in 32 grams of Oxygen (O)? *
Answer: The correct answer is 2 moles.
Explanation:
Ammonium chloride is produced in the thermochemical equation NH3 (g) + HCl (g) → NH4Cl (s) ΔH = –176 kJ.
How many moles of NH4Cl have been produced if the change in enthalpy is –528 kJ?
Answer:
3 moles of NH₄Cl
Explanation:
We'll begin by writing the balanced equation for the reaction. This is illustrated below:
NH₃(g) + HCl(g) → NH₄Cl(s) ΔH = –176 kJ
From the balanced equation above,
1 mole of NH₄Cl where obtained when the change in enthalphy (ΔH) was –176 kJ.
Finally, we shall determine the number of mole of NH₄Cl produced when the change in enthalphy (ΔH) is –528 kJ. This can be obtained as follow:
From the balanced equation above,
1 mole of NH₄Cl where obtained when the change in enthalphy (ΔH) was –176 kJ.
Therefore, Xmol of NH₄Cl will be obtained when the change in enthalphy (ΔH) is –528 kJ i.e
Xmol of NH₄Cl = –528 / –176
Xmol of NH₄Cl = 3 moles
Thus, 3 moles of NH₄Cl where obtained from the reaction.
What is the correct name for Na2O?
Answer:
Sodium oxide
Explanation:
Answer: Sodium oxide
The light and dark circles in the picture represent different types of atoms. Which picture best represents a pure compound?
The third picture has only one type of combination of atoms so it represents a pure compound. Therefore, option (c) is correct.
What is a pure compound?A pure compound is a compound that contains two or more elements combined chemically in a fixed ratio. These compounds can be broken down into separate or simple elements by chemical methods.
A pure compound is formed when elements are joined together by chemical bonds. Compounds such as water, crystals, and baking soda as pure.
Water is a compound formed by the combination of oxygen and hydrogen in a fixed ratio. A pure substance is a substance that has only one kind of atom or molecule having a constant composition.
The first picture represents pure substance and the 2nd and 4th pictures represent mixed compounds. Therefore, the third picture represents a pure compound.
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What is the buoyant force of a dog that displaces 10 pounds of water?
Answer:
pls answer this link for the answer :D
Explanation:
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K2S(s) + MgI2 (aq) -----> ?
Answer:
MgS + KI = K2S + MgI2
According to the Arrhenius concept, an acid is a substance that ________. According to the Arrhenius concept, an acid is a substance that ________. tastes bitter can accept a pair of electrons to form a coordinate covalent bond is capable of donating one or more H reacts with the solvent to form the cation formed by autoionization of that solvent causes an increase in the concentration of H in aqueous solutions
Answer: According to the Arrhenius concept, an acid is a substance that causes an increase in the concentration of H in aqueous solutions
Explanation:
According to the Arrhenius concept, an acid is a substance that ionizes in the water to give hydronium ion or hydrogen ion and a bases is a substance that ionizes in the water to give hydroxide ion .
[tex]HA(aq)\rightarrow H^+(aq)+A^-(aq)[/tex]
[tex]BOH(aq)\rightarrow B^+(aq)+OH^-(aq)[/tex]
According to lewis concept , an acid is a substance that accepts electrons and a base is a substance that can donate electrons.
In what part of the atom do alpha or beta particles originate?
Answer:
Nucleus
Explanation:
they originate in the nucleus