Answer:
It can come from unstable atoms that undergo radioactive decay, or it can be produced by machines. Radiation travels from its source in the form of energy waves or energized particles. There are different forms of radiation and they have different properties and effects
30. The density of an unknown gas at 27°C and 2 atm pressure is equal with density of N2 gas at
52°C and at 5 atm
pressure. Calculate the molar mass of that unknown gas.
pls help guys
Answer:
Molar mass of the unknown gas is 64.6 g/mol
Explanation:
Let's think this excersise with the Ideal Gases Law.
We start from the N₂. At STP conditions we know that 1 mol of anything occupies 22.4L.
We apply: P . V = n . R . T
5 atm . V = 1 mol . 0.082 . 325K
V = (1 mol . 0.082 . 325K) / 5 atm = 5.33 L
It is reasonable to say that, if we have more pressure, we may have less volume.
As this is the volume for 1 mol of N₂, our mass is 28 g. Then, the density of the nitrogen and the unknown gas is 28 g/5.33L = 5.25 g/L
Our unknown gas has, this density at 27°C and 2 atm.
If we star from this, again: 1 mol of any gas occupy 22.4L at STP, we can calculate the volume for 1 mol at those conditions:
P₁ . V₁ / T₁ = P₂ . V₂ / T₂
1 atm . 22,4L / 273K = 2 atm . V₂ / 300K
Remember that the value for T° is Absolute (T°C + 273)
[ (1 atm . 22.4L / 273K) . 300K] / 2 atm = V₂ → 12.3L
This is the volume for 1 mol of the unknown gas at 2 atm and 27°C
We use density to determine the mass: 12.3 L . 5.25 g/L = 64.6 g
That's the molar mass: 64.6 g/mol
Explain why the pressure of a gas increases when its volume decreases.
HELP
Answer:
The gas pressure is raised by decreasing the volume of a gas. ... The particles can collide more often with the walls of the container because the volume has decreased. They exert force on them each time they collide with the walls. More collisions mean more force, so it will increase the strain.
hope this helped :)
pls help
Plot the point (5,9)
Whose atomic theory explains how atoms emit (release) and absorb light?
O Bohr's
O Dalton's
O Rutherford's
O Thomson's
Answer:
Bohr's model of hydrogen atom
I hope this answer is correct
Answer:
Bohr's
Explanation:
Which statement describes an interaction between the biosphere and the atmosphere that is related to
photosynthesis?
• During photosynthesis, plant roots take in water from soil.
O During photosynthesis, plants take in carbon dioxide from the air.
O Through photosynthesis, energy stored in plants is released into the air.
O Through photosynthesis, energy stored in plants is transferred to humans who eat them
Answer:
O During photosynthesis, plants take in carbon dioxide from the air.
Answer: The answer is: During photosynthesis, plants take in carbon dioxide from the air.
Explanation: I have my ways ;>
What happens to the total number of carbon atoms on Earth? Does the total get larger, does it get smaller, or does it stay the same?
Answer:
It stays the same.
Explanation:
BEST ANSWER GETS MOST POINTS!
In your lab group you combined vinegar and water and observed the results shown in the picture. Choose ALL of the evidence that supports that a chemical change has occured?
A) A gas is produced.
B) The color changed.
C) Bubbling occurred.
D) The baking soda dissolved.
D) There is a change in the composition of the reactants.
Answer:
B) A gas is produced
Explanation:
How many moles of magnesium (Mg) are there in 96.3 g of Mg?
Explanation:
number of moles = m/Mr and the process is in the picture
Which statement best describes how an electromagnetic motor works?
Electrons are moved through a magnet, creating a circuit. That circuit interacts with a current, moving the
conductor in the orientation of the field
Electrons are moved through a current, creating a circuit. That circuit interacts with a magnet, moving the
conductor in the onentation of the field.
Elections are moved through a circuit, creating a current That current interacts with a magnet, moving the
conductor in the orientation of the field
Electrons are moved through a magnet creating a current. That current interacts with a circuit, moving the
conductor in the onentation of the field
Answer:
electrons are moved through a magnet creating a current. the current instracts with a circuit, moving the conductor in the onentation of the field
An ore sample is found to contain 10.500000 g of cobalt and 87.3 g waste rock (gangue). What is the
percent by mass of cobalt in the ore?
Answer:
[tex]\% Co=10.7\%[/tex]
Explanation:
Hello!
In this case, since this is a mixture composed by cobalt and waste rock, we can compute the percent by mass of cobalt as shown below:
[tex]\% Co=\frac{m_{Co}}{m_{Co}+m_{waste}} *100\%\\\\[/tex]
Thus, we plug in to obtain:
[tex]\% Co=\frac{10.500000g}{10.500000g+87.3} *100\%\\\\\% Co=10.7\%[/tex]
Best regards!
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How does a limiting reagent affect how much product is formed?
O A. The amount of product will be limited by the molar mass of the
limiting reagent
B. The amount of product will be limited by the sum of the reactant
coefficients.
C. The amount of product will be limited by the number of moles of
the limiting reagent.
D. The amount of product will be limited by leftover amounts of other
reactants.
Answer:
C. The amount of product will be limited by the number of moles of
the limiting reagent.
Explanation:
a p e x :)) i just took the quiz
The amount of product will be limited by the number of moles of
the limiting reagent. Hence, option C is correct.
What is a Limiting reagent?The reactant that gets consumed early in the reaction restricts the quantity of product which will be produced in the chemical reaction. Thus, the reactant that gets consumed early in a chemical reaction is a limiting reagent.
Hence, the amount of product will be limited by the number of moles of the limiting reagent.
Learn more about limiting reagents:
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What happens as elevation increases?
Answer:
As altitude increases, the amount of gas molecules in the air decreases the air becomes less dense than air nearer to sea level.
Explanation:
an atom of which element has the strongest attraction for electons in a chemical bond?cholorine, phosphorus, carbon, sulfur
The number of atoms of any element in the given chemical formula is the number that is written on the foot of the symbol of that element. Therefore, chlorine has the strongest attraction for electrons in a chemical bond.
What is atom?Atom is the smallest particle of any matter. Atom combines to form element and element combine to form molecule or compound.
Atom consists of electron, proton and neutron. The total mass of atom is inside the nucleus. Inside the nucleus proton and neutron is there. So calculate mass of an atom, total mass of all protons is added to the total mass of neutron. Electrons revolve around the nucleus.
Electronegative element have greatest strongest attraction for electrons due to high effective nuclear charge. Among the given molecules, chlorine is the most electronegative element. Chlorine has the strongest attraction for electrons in a chemical bond.
Therefore, chlorine has the strongest attraction for electrons in a chemical bond.
Learn more about atoms, here:
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PLEEAASSEE HELP ITS ALREADY WAY PAST DUE AND ILL GIVE BRAINLIEST
Which of the following would be the evidence of a physical change?
A. unexpected change in odor
B. change in state of matter
C. formation of bubbles
D.precipitate was formed
Answer:
A. unexpected change in odor
Explanation: Common physical changes include melting, change of size, volume, color, density, and crystal form. Example the classic baking soda and vinegar reaction provides evidence of a chemical change due to the formation of a gas and a temperature change.
A chemist prepares a solution of silver(I) perchlorate by measuring out of silver(I) perchlorate into a volumetric flask and filling the flask to the mark with water. Calculate the concentration in of the chemist's silver(I) perchlorate solution. Be sure your answer has the correct number of significant digits.
The question is incomplete, the complete question is;
A chemist prepares a solution of silver (I) perchlorate (AgCIO4) by measuring out 134.g of silver (I) perchlorate into a 50.ml volumetric flask and filling the flask to the mark with water. calculate the concentration in mol/L of the silver (I) perchlorate solution. Round your answer to 2 significant digits.
Answer:
13 mol/L
Explanation:
We must first obtain the number of moles of silver I perchlorate involved
Molar mass of silver I perchlorate = 207.32 g/mol
Number of moles of silver I perchlorate = 134g/207.32 g/mol = 0.646 moles
Recall that;
n =CV
C= concentration
V= volume
n = number of moles
C = n/V
C = 0.646 moles * 1000/50
C = 13 mol/L
Calculate the number of grams of 3.24 x 10^22molecules of CH3(CH2)8(OH)2
8.68 g CH₃(CH₂)₈(OH)₂
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 TableAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Stoichiometry
Using Dimensional AnalysisExplanation:Step 1: Define
3.24 × 10²² molecules CH₃(CH₂)₈(OH)₂
Step 2: Identify Conversions
Avogadro's Number
[PT] Molar Mass of C - 12.01 g/mol
[PT] Molar Mass of H - 1.01 g/mol
[PT] Molar Mass of O - 16.00 g/mol
Molar Mass of CH₃(CH₂)₈(OH)₂ - 12.01 + 3(1.01) + 8[12.01 + 2(1.01)] + 2[16.00 + 1.01] = 161.3 g/mol
Step 3: Convert
Set up: [tex]\displaystyle 3.24 \cdot 10^{22} \ molecules \ CH_3(CH_2)_8(OH)_2(\frac{1 \ mol \ CH_3(CH_2)_8(OH)_2}{6.022 \cdot 10^{23} \ molecules \ CH_3(CH_2)_8(OH)_2}) \cdot (\frac{161.3 \ g \ CH_3(CH_2)_8(OH)_2}{1 \ mol \ CH_3(CH_2)_8(OH)_2})[/tex]Multiply/Divide: [tex]\displaystyle 8.67838 \ g \ CH_3(CH_2)_8(OH)_2[/tex]Step 4: Check
Follow sig fig rules and round. We are given 3 sig figs.
8.67838 g CH₃(CH₂)₈(OH)₂ ≈ 8.68 g CH₃(CH₂)₈(OH)₂
Question 3 (0.05 points)
Fixed metals are metals in representative elements, plus three metals in transition
elements: Zn, Ag, Cd. Variable metals are metals in transition elements, except Zn,
Ag, and Cd. What is the different between the names of ionic compounds containing
fixed metal and those containing variable metals?
A) Ionic compounds containing variable metals should have Roman numerals
CD B) lonic compounds containing fixed metals should have prefixes
C) lonic compounds containing fixed metals should have Roman numerals
Pleaseeeeeee helppppppp
Answer:
A) Ionic compounds containing variable metals should have Roman numerals
Explanation:
The correct option is;
A) Ionic compounds containing variable metals should have Roman numerals
This is because these variable metals have variable oxidation states and charges. Hence, to be able to distinguish between compounds containing the same element but different charges, the roman numerals is used. For example;
FeCl₃ - Iron(III) Chloride
FeCl₂ - Iron(II) Chloride
Hot, molten rock deep below Earth’s surface is called lava mantle rock parent rock magma
Answer:
I think it is Magma
What is the molarity when 1.25 mol is dissolved in 3.50 L of solution?
Answer:
0.36 mol/L
Explanation:
The formula for molarity M=m/L
m stands for moles
L stands for liters
Plug it into the equation...
M=1.25 mol/3.5 L
M=0.35714285714
which gas is used in flying balloons ?
Answer:
hydrogen
Explanation:
can i have brainliest please
Body Color is a ___________
Variation
Trait
Feature
Observation
Specify the number of possible isomers of bromodimethylbenzene. 6 Write the name of one of these isomers. Abbreviate ortho (o), meta (m) and para (p), no italics, if you elect to use these terms.fill in the blank 2 Specify the number of possible isomers of aromatic compounds with the formula C7H8O. ___ Write the name of one of these isomers. Abbreviate ortho (o), meta (m) and para (p), no italics, if you elect to use these terms. fill in the blank 4
Answer:
Explanation:
See attached file .
The number of possible isomers of Bromodimethylbenze are 6. One of the isomers is 2 Bromo - m -xylene. The number of possible isomers of an aromatic compound [tex]\rm C_7H_8O[/tex] are 5. One of these isomers has been o - cresol.
(a). Bromodimethylbenze has also been known as bromoxylene. The compound has been consisted of 1 benzene ring with 2 methyl groups and a bromine atom.
The possible isomers of bromoxylene are:
4 Bromo - o -xylene3 Bromo - o -xylene2 Bromo - m -xylene4 Bromo - m -xylene5 Bromo - m -xylene2 Bromo - p -xylene(b). Aromatic compound with formula [tex]\rm C_7H_8O[/tex] has been the benzene compound. The compound has been consisted of a benzene ring with 1 methyl group and oxygen atom.
The possible isomers of [tex]\rm C_7H_8O[/tex] are:
Benzyl alcoholAnisolo - cresolp - cresolm - cresolThus, the number of possible isomers of Bromodimethylbenze are 6. One of the isomers is 2 Bromo - m -xylene. The number of possible isomers of an aromatic compound [tex]\rm C_7H_8O[/tex] are 5. One of these isomers has been o - cresol.
For more information about isomers, refer to the link:
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1) How many moles of water does 6.02 x 1023 molecules
represent?
Answer:
1.00 mol
Explanation:
Step 1: Given data
Molecules of water: 6.02 × 10²³ molecules
Step 2: Calculate the number of moles corresponding to 6.02 × 10²³ molecules of water
In order to convert molecules to moles, we need a conversion factor. In this case, we will use Avogadro's number: there are 6.02 × 10²³ molecules in 1 mole of molecules.
6.02 × 10²³ molecules × 1 mol/6.02 × 10²³ molecules = 1.00 mol (we keep 3 significant figures)
Help plzzz I don’t get to
How many moles are in 5.34 x 10*21 particles of Nitrogen?
En la ecuación: Fe2O3 + CO = Fe + CO2.
El agente reductor es:
a)oxido ferrico
b)dióxido de carbono
c)monóxido de carbono
d)hierro
Answer:
English please
Explanation:
the color of a mineral streak is often different than its color true or false
True or False:
Houston, Texas received approximately 2 inches of snow on February 15, 2021. Based on this, we can now say Houston's climate consists of long, freezing winters and yearly snowfall. Please answer ASAP. Thanks
Answer:
False.
Explanation:
I majored in Chemistry
Which name for an ionic compound is
incorrect?
Chromium(IID fluoride (for CrF3 )
Copper(ID) oxide (for Cuo)
Potassium(I bromide (for KBr)
Answer:
no se ingles todavía no aprendo a hablar inglés ya si estuvieran en español los respondia
