Answer: Hydrogen molecules will have greatest average speed.
Explanation:
The formula for average speed is :
[tex]\mu_{av}={\sqrt{\frac{8RT}{\pi\times M}}}[/tex]
R = gas constant
T = temperature
M = Molecular Mass
Now putting all the values:
[tex]\frac{\nu_{H_2}}{\nu_{O_2}}=\sqrt{\frac{8RT}{\pi\times M_{H_2}}}/{\sqrt{\frac{8RT}{\pi\times M_{O_2}}}[/tex]
[tex]\frac{\nu_{H_2}}{\nu_{O_2}}=\sqrt{\frac{16}{2}}[/tex]
[tex]\frac{\nu_{av}_{H_2}}{\nu_{av}_{O_2}}=8[/tex]
Thus average speed of hydrogen is 8 times the average speed of oxygen. Thus hydrogen molecules will have greatest average speed
Someone please help me please
Answer:
1. Solid
2. Melting Point
3. liquid
4. Boiling point
5. gas
Write 5 sentences explaining how ionic compounds are formed.
Explanation:
Ionic bonds are special interatomic or intramolecular forces of attraction within a compound.
They are formed between atom with large electronegativity differences. These atoms are usually metals and non- metalsThe transfer of electrons from the metals to the non-metals makes both specie becomes ions. This leads to the stability of the ions as they are isoelectronic with the noble gases. The electrostatic attraction between the ions that are oppositely charged leads to the formation of ionic bonds.Use the data table below. What are the two gases present in the test tube If the glowing splint ignites and the burning splint creates a small explosion? How do you know?
Answer:
hydrogen and oxygen
Explanation:
oxygen gas ignites a glowing splint because it supports burning while hydrogen gas extinguishes the burning splint with a pop sound.
the mixture of the two explodes thus the observation
Need help as fast as possible please?
There are
main variables that every experiment should have
Answer:
Experiments should have the independent variable, and a dependent variable, as well as a constant variable and control variables.
Explanation:
Constants
Experimental constants are values that do not change either during or between experiments. Many natural forces and properties, such as the speed of light and the atomic weight of gold, are experimental constants. In some cases, a property can be considered constant for the purposes of an experiment even though it technically could change under certain circumstances. The boiling point of water changes with altitude and acceleration due to gravity decreases with distance from the earth, but for experiments in one location these can also be considered constants.
Independent Variable
The independent variable in an experiment is the variable whose value the scientist systematically changes in order to see what effect the changes have. A well-designed experiment has only one independent variable in order to maintain a fair test. If the experimenter were to change two or more variables, it would be harder to explain what caused the changes in the experimental results. For example, someone trying to find how quickly water boils could alter the volume of water or the heating temperature, but not both.
Dependent Variable
A dependent variable is what the experimenter observes to find the effect of systematically varying the independent variable. While an experiment may have multiple dependent variables, it is often wisest to focus the experiment on one dependent variable so that the relationship between it and the independent variable can be clearly isolated. For example, an experiment could examine how much sugar can dissolve in a set volume of water at various temperatures. The experimenter systematically alters temperature (independent variable) to see its effect on the quantity of dissolved sugar (dependent variable).
Control
A controlled variable is a variable that could change, but that the experimenter intentionally keeps constant in order to more clearly isolate the relationship between the independent variable and the dependent variable. For example, an experiment examining the relationship between how much sunlight plants receive (independent variable) and how tall they grow (dependent variable) should make sure none of the other factors change. The experimenter should control how much water the plants receive and when, what type of soil they are planted in, and as many other variables as possible.
Need help as fast as possible
convert 180 g/mol to mole/L
How many moles of tin, Sn, are in 2500 atoms of tin?
4.2 × 10⁻²¹ moles Sn
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Using Dimensional AnalysisAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Explanation:Step 1: Define
2500 atoms Sn
Step 2: Identify Conversions
Avogadro's Number
Step 3: Convert
Set up: [tex]\displaystyle 2500 \ atoms \ Sn (\frac{1 \ mol \ Sn}{6.022 \cdot 10^{23} \ atoms \ Sn})[/tex]Multiply: [tex]\displaystyle 4.15144 \cdot 10^{-21} \ moles \ Sn[/tex]Step 4: Check
Follow sig fig rules and round. We are given 2 sig figs.
4.15144 × 10⁻²¹ moles Sn ≈ 4.2 × 10⁻²¹ moles Sn
What is the atomic number of sulfur?
How many of its s orbitals are filled?
How many of its p orbitals are filled?
Answer:
z=16 and five p orbitals are filled and three s orbitals are filled
Which of the following is true about the offspring of an organism Y that reproduces sexually? *
A:The offspring would show all the traits of Y.
B:The offspring would be identical in size to Y.
C:The offspring would have identical DNA as Y.
D:The offspring would show some traits of the parent other than Y.
Answer:
D
Explanation:
It's essentially just half and half, meaning the offspring would have the nose of the mother, the eyes of the fathers, basically crud like that
The statement that is true about the offspring of an organism Y that reproduces se*ually is that offspring would show some traits of the parent other than Y.
What is se*ual reproduction?Se*ual reproduction is the type of reproduction that involves two organisms to produce an offspring.
The process of se*ual reproduction involves one male and one female organism of the same species.
This means that the offspring of organisms that reproduced se*ually will show traits of both organism involved.
Therefore, statement that is true about the offspring of an organism Y that reproduces se*ually is that offspring would show some traits of the parent other than Y.
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Decide which element probably has a boiling point most and least similar to the boiling point of indium
Answer:
Most similar- Al
Least similar- F
Explanation:
From our knowledge of the periodic table, it is already clear that elements in the same group in the periodic table share certain similarities in physical and chemical properties.
Since Indium and aluminium belong to the same group in the periodic table, they will share a similarity in their boiling points.
Florine is a non metal, it is expected to be least similar to indium in physical properties.
On the periodic table, the elements known as noble gases are all found in
Answer:
Group 18 (VIIIa)
Explanation:
is volcanoes eruption rapid change or slow change
Answer:
Fast change
Explanation:
Weathering, erosion, and deposition are examples of slow change. Earthquakes, erupting volcanoes, and landslides happen fast. Therefore, they can change the Earth's surface very quickly.
Draw the Lewis structure for the compound with the formula COCl2. Use lines to show bonding electrons. Draw the molecule by placing atoms on the canvas and connecting them with bonds. Include all lone pairs of electrons.
Answer:
Explanation:
The lewis structure illustrates the bonding occuring between atoms of a molecule in conjunction with the lone pairs of electrons which have the possibility of existence in the molecule.
The image attached below shows the Lewis structure for the given Carbonyl dichloride (COCl₂) compound. From the image, the chlorine contains seven valence electrons, the carbon contains four valence electrons and oxygen contains six valence electrons.
Which solution has a higher percent ionization of the acid, a 0.10M solution of HC2H3O2(aq) or a 0.010M solution of HC2H3O2(aq)
Answer:
The solution 0.010 M has a higher percent ionization of the acid.
Explanation:
The percent ionization can be found using the following equation:
[tex]\% I = \frac{[H_{3}O^{+}]}{[CH_{3}COOH]} \times 100[/tex]
Since we know the acid concentration in the two cases, we need to find [H₃O⁺].
By using the dissociation of acetic acid in the water we can calculate the concentration of H₃O⁺ in the two cases:
1. Case 1 (0.1 M):
CH₃COOH(aq) + H₂O(l) ⇄ CH₃COO⁻(aq) + H₃O⁺(aq) (1)
0.1 - x x x
[tex] Ka = \frac{[CH_{3}COO^{-}][H_{3}O^{+}]}{[CH_{3}COOH]} [/tex] (2)
Where:
Ka: is the dissociation constant of acetic acid = 1.7x10⁻⁵.
[tex] 1.7 \cdot 10^{-5} = \frac{x^{2}}{0.1 - x} [/tex]
[tex] 1.7 \cdot 10^{-5}*(0.1 - x) - x^{2} = 0 [/tex]
By solving the above equation for x we have:
x = 1.29x10⁻³ M = [CH₃COO⁻] = [H₃O⁺]
Hence, the percent ionization is:
[tex] \% I = \frac{1.29 \cdot 10^{-3} M}{0.1 M} \times 100 = 1.29 \% [/tex]
2. Case 2 (0.01 M):
The dissociation constant from reaction (1) is:
[tex] Ka = \frac{[CH_{3}COO^{-}][H_{3}O^{+}]}{[CH_{3}COOH]} [/tex]
With [CH₃COOH] = 0.01 M
[tex] 1.7 \cdot 10^{-5} = \frac{x^{2}}{0.01 - x} [/tex]
[tex]1.7 \cdot 10^{-5}*(0.01 - x) - x^{2} = 0[/tex]
By solving the above equation for x:
x = 4.04x10⁻⁴ M = [CH₃COO⁻] = [H₃O⁺]
Then, the percent ionization for this case is:
[tex] \% I = \frac{4.04 \cdot 10^{-4} M}{0.01 M} \times 100 = 4.04 \% [/tex]
As we can see, the solution 0.010 M has a higher percent ionization of the acetic acid.
Therefore, the solution 0.010 M has a higher percent ionization of the acid.
I hope it helps you!
The 0.010 M solution of CH₃COOH has a higher percent ionization compared to the 0.10 M solution.
Percentage ionization formulaThe percent ionization of the acid solution is determined using the following equation:
Percent ionization = [H₃O⁺]/[CH₃COOH]What is the ionization equation of CH₃COOHIonization equation of CH₃COOH is given below:
CH₃COOH + H₂O ⇄ CH₃COO⁻ + H₃O⁺
Ka = 1.7 * 10⁻⁵
Ka = [CH₃COO⁻][H₃O⁺]/[CH₃COOH]Calculating [H₃O⁺]The [H₃O⁺] in both solutions is determined first.
For the 0.1 M solution:
CH₃COOH(aq) + H₂O(l) ⇄ CH₃COO⁻(aq) + H₃O⁺(aq) (1)
0.1 - x x x
Using the equation of dissociation constant:
Ka = [CH₃COO⁻][H₃O⁺]/[CH₃COOH]
1.7 * 10⁻⁵ = x₂/0.1 - x
assuming x is very small;
x = 1.29 * 10 ⁻³ M
Hence, [H₃O⁺] = 1.29 * 10 ⁻³ M
For the 0.010 M solution
CH₃COOH(aq) + H₂O(l) ⇄ CH₃COO⁻(aq) + H₃O⁺(aq) (1)
0.01 - x x x
Using the equation of dissociation constant:
Ka = [CH₃COO⁻][H₃O⁺]/[CH₃COOH]
1.7 * 10⁻⁵ = x₂/0.01 - x
assuming x is very small;
x = 4.04 * 10 ⁻⁴ M
Hence, [H₃O⁺] = 4.04 * 10 ⁻⁴ M
Calculating the percent ionizationFor the 0.1 M solution
Percent ionization = (1.29 * 10 ⁻³ M/0.1) * 100%
Percent ionization = 1.29%
For the 0.01 M solution:
Percent ionization = (4.04 * 10 ⁻⁴ M/0.1) * 100%
Percent ionization = 4.04 %
Therefore, the 0.010 M solution of CH₃COOH has a higher percent ionization compared to the 0.10 M solution.
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Assume you mixed 5 µl of your cod fish homogenate with 195 µl working solution. The fluorometer displays a measurement of 12.2 µg/ml. What is the protein concentration of the cod fish homogenate?
Answer:
Hallo
Explanation:
I took that question
Someone please help me plz :(please
Answer:
4
Explanation:
the actual change in phase is 4 on the diagram
P is the dominant allele for purple. p is the recessive allele for white. A Pp flower crosses with a pp flower. What are the possible genotypes? What are the odds of getting each genotype? What are the odds of getting a purple flower? What are the odds of getting a white flower? * PLS HELPASDKSOAD
Answer:
Pp, Pp, pp, pp, 50% chance at purple and 50% chance at white
Explanation:
In an experiment, a student places a small piece of pure Mg(s) into a beaker containing 250.mL of 6.44MHCl(aq) . A reaction occurs, as represented by the equation above. (a) Write the balanced net ionic equation for the reaction between Mg(s) and HCl(aq) .
Answer:
Mg(s) + 2H^+(aq) ----> Mg^2+(aq) + H2(g)
Explanation:
We must first write the molecular equation, then obtain the complete ionic equation and subsequently get the net ionic equation as shown below;
Molecular reaction equation;
Mg(s) + 2HCl(aq) ------> MgCl2(aq) + H2(g)
Complete ionic equation;
Mg(s) + 2H^+(aq) + 2Cl^-(aq) ----> Mg^2+(aq) + 2Cl^-(aq) + H2(g)
Net ionic equation;
Mg(s) + 2H^+(aq) ----> Mg^2+(aq) + H2(g)
What energy transformation occurs when a battery-powered toy car is set into motion when it is switched on?
Chemical to mechanical to electrical
Electrical to mechanical to chemical
Electrical to chemical to mechanical
Electrical to chemical to mechanical
Chemical to electrical to mechanical
Answer:
Chemical to electrical to mechanical
Explanation:
The energy conversion going on in a battery - powered toy car is from chemical to electrical and then to mechanical energy.
According to the law of conservation of energy, energy is neither created nor destroyed but transformed from one form to another.
A battery is a cell that is capable of producing electrical energy from chemical actions. This electrical energy is used to power rotors in the toy car which cause the mechanical motion of the device.A substance made up of two or more types of atoms that are NOT chemically combined is called a(n)
A
element
B
mixture
с
compound
D
pure substance
Answer:
pure substance
Explanation:
it does not combine to anything.
Help it is easy I think
Why must scientific investigations be replicable?
A ) to prove the reliability of the results
B)to confirm ideas and theories
C)to prove its validity within the scientific community
D)to improve the investigation each time
Answer:a
Explanation:
Answer:
Answervis A.
Explanation:
Because,so that other scientists can validate the results.
I hope it's helpful!
How many atoms are there in 15.0 grams of Sulfur (S)?
A) 7.99×10−22 atoms of S
B) 7.77×10−25 atoms of S
C) 2.82×1023 atoms of S
D) 9.03×1024 atoms of S
Answer:
C
Explanation:
Mol x Avogadro's number
Mol : mass / molar mass
Avogadro's no: 6.02E+23
In 15.0 g of sulfur, there are 2.82 × 10²³ atoms of S (C).
We want to calculate the number of atoms in 15.0 g of sulfur. We will need 2 conversion factors.
What is a conversion factor?A conversion factor is an arithmetical multiplier for converting a quantity expressed in one set of units into an equivalent expressed in another.
To convert 15.0 g of sulfur into atoms, we need to consider the following conversion factors:
The molar mass of S is 32.07 g/mol.1 mol contains 6.02 × 10²³ atoms (Avogadro's number).[tex]15.0g \times \frac{1mol}{32.07g} \times \frac{6.02 \times 10^{23}atoms }{1mol} = 2.82 \times 10^{23} [/tex]
In 15.0 g of sulfur, there are 2.82 × 10²³ atoms of S (C).
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Why did the French set up trading posts in North America?
Answer: Their main aim was to provide goods, specifically furs and sugar exportation.
Explanation:
The reaction described in Part A required 3.40 L of sodium chloride. What is the concentration of this sodium chloride solution
Answer:
Part A:
First, convert molarity to moles by multiplying by the volume:
0.293 M AgNO3 = (0.293 moles AgNO3)/1 L x 1.19 L = 0.349 moles AgNO3
A certain ore contains 34% hematite, Fe2O3. Hematite is 69.9% iron. How much iron can be isolated from 250 tons of this ore
Answer:
59.4 tons of iron can be isolated from this ore
Explanation:
mass of ore = 250 tons
mass of hematite = 34 % of 250
= 85 tons
mass of iron = 69.9 % of hematite
= 69.9 % of 85
= 59.4 tons
So, 59.4 tons of iron can be isolated from this ore .
1-Witch compound is composed of the most atoms?
A- H25O4. B-Li2N.
C-Mg(OH)2. D-NaF.
2-Witch compound has the most hydrogen atoms?
A-NaOH. B-C2H4O.
C-H3PO4. D-(NH3)2SO4.
3-Witch compound has the greatest molar más?
A-H2O. B-C6H12O6.
C-HNO3. D-C2H6.
4-What is the molar mass for Ca(C2H3O2)2?
A-71g. B-99g.
C-158g. D-148g
5-show work for #4.
Answer:
good luck with these problems I've never seen anything like it
I need help fast plz atoms
Answer:
proton and neutron in region one and electron orbiting in region two is the answer
researcher measures the mass of a sample to be 5.51 g. The actual mass of the sample is known to be 5.80g. Calculate the percent error.
Answer:
5% is the percent error
Explanation:
Percent error is defined as the 100 times the ratio of absolute value of the difference between the measurement and the theoretical value and the theoretical value, that is:
[tex]\frac{|Theoretical-Measurement|}{Theoretical} * 100[/tex]
In the problem, theoretical value is 5.80g and the measurement is 5.51g:
[tex]\frac{|5.80g-5.51g|}{5.80g} * 100[/tex]
% =
5% is the percent errorHELP ASAP PLEASE, I WILL GIVE BRAINLIEST
Answer:
1.
Solid: A, B, and C.
Liquid: D and E.
Gas: F.
2.
Into liquid on warm day (37 °C): D and C.
Into a liquid only when heated slightly: C and E.
From liquid to solid readily when placed into a freezer (0 °C): D.
Explanation:
Hello!
In this case, since the melting point is the temperature at which a substance change from solid to liquid and the boiling point from liquid to gas, we understand that substance at a temperature below the melting point is solid, whereas above are liquid; moreover, below the boiling point they are liquid and above gaseous.
In such a way, we have:
1.
Solid: A, B, and C.
Liquid: D and E.
Gas: F.
2.
Into liquid on warm day (37 °C): D and C.
Into a liquid only when heated slightly: C and E.
From liquid to solid readily when placed into a freezer (0 °C): D.
Best regards!