How many moles are in 163.5 liters of oxygen gas?
One mole of oxygen gas, which has the formula O2, has a mass of 32 g and contains 6.02 X 1023 molecules of oxygen but 12.04 X 1023 (2 X 6.02 X 1023) atoms, because each molecule of oxygen contains two oxygen atoms.
1. What are the rows of the periodic table called and what do they tell us?
Answer:
The elements are arranged in seven horizontal rows, called periods or series, and 18 vertical columns, called groups.
Each row represents one period; the period number of an element indicates how many of its energy levels house electrons. Sodium, for instance, sits in the third period, which means a sodium atom typically has electrons in the first three energy levels.
Explanation:
PLS HELP ASAP.thank you so much if u help me!!!
The value of the equilibrium constant for a reaction
a. changes with temperature.
b. changes with time.
c. is the same under all conditions.
d. changes with concentration.
Answer:
a. changes with temperature.
Explanation:
Hello there!
In this case, according to the thermodynamic definition of the equilibrium constant in terms of the Gibbs free energy of reaction and the temperature of the system:
[tex]lnK=-\frac{\Delta G}{RT}[/tex]
It is possible to figure out that the equilibrium constant varies as temperature does, not only on the aforementioned definition, but also in the Gibbs free energy as it is also temperature-dependent. Therefore, the appropriate answer is a. changes with temperature.
Best regards!
1. If 3.2 L of nitrogen monoxide and 4.3 g of oxygen gas are combined, what volume of nitrogen dioxide will be formed? 2NO + 0, -> 2NO,
Answer:
[tex]3.2 \div 22.4 = \frac{1}{7} mol \: no[/tex]
[tex]4.3 \div 32 = 0.134mol \: o2[/tex]
Explanation:
NO is limit reactant so:
1÷7×46=6.57 grams of NO2 will form
How many protons are in Cesium-135 (Cs)?
A. 35
B. 55
C. 80
D. 195
why cancer is not a pathogen?
Answer:
Because their cells duplicate inside of you not normally!
Explanation:
Hope this helps! Plz mark as brainliest! :)
_ C4H8O+ _O₂ _ CO2+ H₂O
balancing equations
when a small amount of hydrogen gas mixes with nitrogen gas, hydrogen is the
Answer:
solvent
Explanation:
Four flasks each contain 100 milliliters of aqueous solutions of equal concentrations at 25°C and 1 atm.
KCI
CH3OH
Ba(OH)2
CH3COOH
Which solutions contain electrolytes?
Answer:
KCl and Ba(OH)₂.
Explanation:
Hello there!
In this case, since electrolytes are substances characterized by presence of covalent bonds between the atoms forming the compound, it is possible to realize that just KCl and Ba(OH)₂ as they are species composed by cations (K and Ba) and anions (OH and Cl); therefore, they have the capacity to get ionized in aqueous solution and thus transfer electricity when present.
Best regards!
The solution containing electrolytes is the flask of KCI and [tex]Ba(OH)_2[/tex].
The correct options are a and c.
What is an electrolyte?An electrolyte is a medium that contains ions and conducts electricity through the movement of ions, but not electrons.
They are minerals present in the body, that are electrically charged.
Electrolytes help in maintaining the water balance in the body, and pH of the body.
The three primary electrolytes are sodium, potassium, and chloride.
Thus, the correct options are a, KCI, and b, [tex]Ba(OH)_2[/tex].
Learn more about electrolyte
https://brainly.com/question/14566383
What type of forces allow for an object to stay at rest or continue at constant velocity.
Answer:Inertia is the property of a body to remain at rest or to remain in motion with constant velocity. Some objects have more inertia than others because the inertia of an object is equivalent to its mass.
Explanation:
Answer:
Inertia
Explanation:
Inertia is the property of a body to remain at rest or to remain in motion with constant velocity.
Methylpropene is used to make synthetic rubber and
contains 0.556g carbon, 0.0933g hydrogen. What is the empirical formula?
Answer:
CH₂
Explanation:
First we convert the given masses of elements into moles, using their respective molar masses:
C ⇒ 0.556 g ÷ 12 g/mol = 0.0463 mol CH ⇒ 0.0933 g ÷ 1 g/mol = 0.0933 mol HNow we divide those results by the lowest value between the two of them:
C ⇒ 0.0463 / 0.0463 = 1H ⇒ 0.0933 / 0.0463 = 2Meaning the empirical formula is CH₂.
Rank the following species in order of increasing basicity. NH3, NH4 , NH2-, Cl-,H2O.
a. NH3
b. NH4
c. NH2
d. Cl-
e. H2O
Answer:
D, E, A, B, C
Explanation:
The weakest base would be Cl- because HCl is a stronger acid than that of H3O+ from which the water is formed.
Also, for NH3 is a stronger acid than +NH4. Reason is that oxygen is more electronegative than nitrogen and thus NH3 is a stronger acid than NH4+.
The stronger, the acid, the weaker its conjugate base. Thus, NH3 is a weaker base than NH4.
NH2- has the highest basicity because nitrogen is less of an electronegative element than is oxygen. Therefore, it will not want a negative charge.
Hence, the final order in terms of increasing basicity is;
Cl-, H20, NH3, NH4, NH2-
Once the energy gets transferred to heat energy, is it reversible or irreversible?
A chemistry student needs to standardize a fresh solution of sodium hydroxide. He carefully weighs out 32.mg of oxalic acid H2C2O4, a diprotic acid that can be purchased inexpensively in high purity, and dissolves it in 250.mL of distilled water. The student then titrates the oxalic acid solution with his sodium hydroxide solution. When the titration reaches the equivalence point, the student finds he has used 60.9mL of sodium hydroxide solution. Calculate the molarity of the student's sodium hydroxide solution. Round your answer to 2 significant digits. M
Answer:
0.012 M
Explanation:
The reaction that takes place is:
H₂C₂O₄ + 2NaOH → Na₂C₂O₄ + 2H₂OFirst we convert 32 mg of H₂C₂O₄ to moles, using its molar mass:
32 mg ÷ 90 mg/mmol = 0.36 mmolThen we calculate how many NaOH moles would react with that amount, using the stoichiometric coefficients:
0.36 mmol H₂C₂O₄ * [tex]\frac{2mmolNaOH}{1mmolH_2C_2O_4}[/tex] = 0.72 mmol NaOHFinally we divide NaOH moles by the used volume, to calculate the molarity:
0.72 mmol NaOH / 60.9 mL = 0.012 MWhich color of visible light has the highest energy?
Blue
Red
Green
Yellow
Answer:
Blue: Because violet really has the most and blue is based on violet!
Explanation:
Hope this helps! Plz mark as brainliest!
What volume in
L
of a 0.724 M Nal solution contains 0.405 mol of Nal ?
Answer:
[tex]0.5594\ \text{L}[/tex]
Explanation:
Mol of NaI = 0.405 mol
Molarity of solution = 0.724 M
Molarity is given by
[tex]M=\dfrac{\text{mol}}{\text{Volume of solution in }NaI}\\\Rightarrow \text{Volume of solution in }NaI=\dfrac{0.405}{0.724}\\\Rightarrow \text{Volume of solution in }NaI=0.5594\ \text{L}[/tex]
The required volume is [tex]0.5594\ \text{L}[/tex].
Where are the most reactive nonmetals located on the periodic table?
How many L are required to make 3.5 M hydrochloric acid using 1.1 moles?
0.31 L
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightEquality Properties
Multiplication Property of Equality Division Property of Equality Addition Property of Equality Subtraction Property of EqualityChemistry
Atomic Structure
MolesAqueous Solutions
Molarity = moles of solute / liters of solutionEquilibrium - Acid/Base
Strong AcidsWeak AcidsWriting AcidsExplanation:Step 1: Define
[Given] 3.5 M HCl
[Given] 1.1 moles
[Solve] Liters solution
Step 2: Solve
Substitute in variables [Molarity]: [tex]\displaystyle 3.5 \ M = \frac{1.1 \ moles}{x \ L}[/tex][Solution] Cross-Multiply [Equality Property]: [tex]\displaystyle x \ L = \frac{1.1 \ mol}{3.5 \ M}[/tex][Solution] Divide: [tex]\displaystyle x = 0.314286 \ L[/tex]Step 3: Check
Follow sig fig rules and round. We are given 2 sig figs.
0.314286 L ≈ 0.31 L
What is the pH of 2.88*10^-5 M LiOH?
Answer: 9.46
Explanation: in LiOH solution concentration of OH- ions is 2.88·10^-5 M
And pOH = -log( 2.88·10^-5 M) = 4.54. Because PH + pOH = 14.00
Then pH = 14-4.54
Imagine you followed all steps correctly, with multiple attempts, and found that the purity of recombinant DHFR isolated through IMAC was not good enough. Hypothesize two changes to the procedure or experimental design that you could consider trying next to increase the purity of our DHFR sample and why you anticipate each to increase protein purity. (5pt)
Answer:
fcgvgbjbbbh,bbb bbnnnnmnbb nbmm m cccg n mm
Explanation:
select the statement that best describes the adaptions of animals and plants
where is the selections?
Which of the following statements is NOT true?
An element and a compound are pure substances.
A homogeneous mixture can be called a solution.
An element and a compound are mixtures.
A homogeneous mixture and a heterogeneous mixture can both be classified as mixtures.
Answer:
An element and a compound are mixtures.Empirical evidence
A
should never be replicable and repeated.
B
helps scientists understand the natural world.
C
will always make a hypothesis true.
D
comes from made up stories about the world.
Answer:
Empirical evidence - B - helps scientists understand the natural world.
Explanation:
Definition from the web," Empirical evidence is information acquired by observation or experimentation. Scientists record and analyze this data. The process is a central part of the scientific method. "
The scientific method-The scientific method begins with scientists forming questions, or hypotheses, and then acquiring the knowledge through observations and experiments to either support or disprove a specific theory. "Empirical" means "based on observation or experience," according to the Merriam-Webster Dictionary. Empirical research is the process of finding empirical evidence. Empirical data is the information that comes from the research.
Before any pieces of empirical data are collected, scientists carefully design their research methods to ensure the accuracy, quality and integrity of the data. If there are flaws in the way that empirical data is collected, the research will not be considered valid.
The scientific method often involves lab experiments that are repeated over and over, and these experiments result in quantitative data in the form of numbers and statistics. However, that is not the only process used for gathering information to support or refute a theory.
This helps scientists by -Identifying empirical evidence in another researcher's experiments can sometimes be difficult. According to the Pennsylvania State University Libraries, there are some things one can look for when determining if evidence is empirical:
Can the experiment be recreated and tested?Does the experiment have a statement about the methodology, tools and controls used?Is there a definition of the group or phenomena being studied?As a raindrop falls from a cloud to the surface of Earth,
A. its speed increases due to gravity.
B. its speed increases due to air resistance,
C. it moves at a constant speed,
<
OD. it moves at a constant velocity
Answer:
The answer is C!
Explanation:
Hope it helps
Answer D
Explanation: did the quiz ψ(｀∇´)ψ
2. A spider builds his web in the horns of a deer. What is the symbiotic
relationship?
I point
O MUTUALISM
COMMENSALISM
PARASITISM
O Other
Answer:
COMMENSALISM
Explanation:
Commensalism refers to the relationship that exists between two different organism that belong to different species. In this relationship neither of the organisms are harmed while either of them is benefitted. The web made by the spider between the horns of the deer increases the probability of the spider to catch its prey. The random movement of the deer helps the spider and at the same time it do not harm the deer.
Why wouldn’t a tennis player with two sneakers “bond” to any other tennis players? Why wouldn’t a helium atom with two electrons “bond” to any other atoms?
Answer:
Explained below.
Explanation:
A tennis player with two sneakers wouldn't bond to any other tennis player because he is already stable and complete with the 2 and doesn't need another players assistance to make him stand well.
However, helium atom with two electrons wouldn't bond to any other atoms because it is stable. This stability arises from the fact that it has two protons and 2 electrons, of which the 2 electrons completely fill its valence shell/outer most shell to make it neutral.
When a hydrocarbon molecule and an oxygen molecule react chemically, energy breaks molecular bonds of the reactants and forms the new molecular bonds of the products. How is energy involved in bonds forming and breaking during the reaction?
Choose one.
A. Energy is released as bonds form and is released as bonds break.
B. Energy is released as bonds form and is absorbed as bonds break.
C. Energy is absorbed as bonds form and is released as bonds break.
D. Energy is absorbed as bonds form and is absorbed as bonds break.
Answer:
C. Energy is absorbed as bonds form and is released as bonds break.
Explanation:
In chemistry, when a bond is broken energy is released, while and bond formation is a process that requires energy -meaning energy is absorbed-.
It is for this reason that reactions of the type A + B → C are endothermical, while reactions of the type C → A + B are exothermical.
#12 don’t understand need help significantly
C. 8.80 mol H₂
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Reading a Periodic TableMolesStoichiometry
Using Dimensional AnalysisAnalyzing Reactions RxNExplanation:Step 1: Define
[RxN - Balanced] N₂ (g) + 3H₂ (g) → 2NH₃ (g)
[Given] 100 g 2NH₃
[Solve] moles H₂
Step 2: Identify Conversions
[RxN] 2 mol NH₃ (g) → 3 mol H₂ (g)
[PT] Molar Mass of N - 14.01 g/mol
[PT] Molar Mass of H - 1.01 g/mol
Molar Mass of NH₃ - 14.01 + 3(1.01) = 17.04 g/mol
Step 3: Stoich
[DA] Set up conversion: [tex]\displaystyle 100 \ g \ NH_3(\frac{1 \ mol \ NH_3}{17.04 \ g \ NH_3})(\frac{3 \ mol \ H_2}{2 \ mol \ NH_3})[/tex][DA] Multiply/Divide [Cancel out units]: [tex]\displaystyle 8.80282 \ mol \ H_2[/tex]Which blood vessels carry blood away from the heart?
veins
arteries
capillaries
Answer:
Arteries
Explanation:
Answer: arteries. :)
Explanation:
the top one is right trust me and i took the test. :)
have agreat day. :)