A container with a volume of 893L contains how may moles of air at STP?
Answer:
i think 54
Explanation:
In the container with a volume of 893 liters, there are 39.9 moles of air at STP conditions.
We can find the number of moles with the Ideal gas law equation:
[tex] PV = nRT [/tex]
Where:
P: is the pressure = 1 atm (STP)
V: is the volume = 893 L
n: is the number of moles =?
R: is the gas constant = 0.082 L*atm/(K*mol)
T: is the temperature = 273 K
Hence, the number of moles is:
[tex] n = \frac{PV}{RT} = \frac{1 atm*893 L}{0.082 L*atm/(K*mol)*273 K} = 39.9 moles [/tex]
Therefore, there are 39.9 moles in the container.
You can find more about Ideal gas law here: https://brainly.com/question/4147359?referrer=searchResults
I hope it helps you!
4. When the mole fraction of solute is 1, there is
(a) a 1:1 ratio of solute to solvent.
(b) no solute present.
(c) only solute present.
(d) only solvent present.
(e) 1 mole of solute and 99 moles of solvent.
Answer:
(c) only solute present
Explanation:
In chemistry, the mole fraction, denoted by X, refers to the number of moles of a substance in a compound/mixture divided by the total number of substances in the same compound or mixture.
In this case, we can say that mole fraction represents the number of solutes to the number of solutes and solvent in the solution i.e. X = nA/nA + nB
Where; nA = number of solutes
nB = number of solvent
X = mole fraction.
Based on this analogy, When the mole fraction of solute is 1, there is only solute present. That is; X = 1 / 1 + 0
X = 1/1 = 1.
Which of the following is NOT a compound?
Table salt
Carbon dioxide
Water
Gold
Answer: Gold.
Explanation: Water, CO2, and table salt are compounds. They are composed of two or more separate elements; a mixture, where as gold is neither.
Does it take shorter or longer time to travel when the velocity is low?
Answer:
yes
explanation:
yes because when the velocity is low, all the energy is low and nothing can't do nothing without energy
Number 2 & 3 please !!<3
Answer:just for the ponits
Explanation:ima be a jenna
How many liters of 3^He are present in 22 moles of gas?
D. The ¬_____________________ converts food into energy. It is found in both plant cells and animal cells.
Answer:
I believe it’s the mitochondria
Explanation:
Answer:
Mitochondria
Explanation:
Ik bc i have the vocab for that question
Will get brainliest.
Answer:
1.00 g
Explanation:
got it on pex
Using the models of the molecules below, (H2 and CH4) what does it mean for a molecule to be symmetrical?
Answer:
A molecule is symmetrical if it can be cut into two identical halves.
Explanation:
H2 can be written as H + H
CH4 is not a symmetrical molecule
Which of the following is one part of a chemical formula for a molecule?
A) A number that shows the total number of chemical bonds
B) Numbers that show how many atoms of each element are in the molecule
C) A number showing the atomic masses of each element
D) A Lewis dot diagram for the molecule
What is the chemical law?
Answer:
Chemical laws are those laws of nature relevant to chemistry. The most fundamental concept in chemistry is the law of conservation of mass, which states that there is no detectable change in the quantity of matter during an ordinary chemical reaction. Modern physics shows that it is actually energy that is conserved, and that energy and mass are related; a concept which becomes important in nuclear chemistry. Conservation of energy leads to the important concepts of equilibrium, thermodynamics, and kinetics.
Explanation:
Have A Wonderful Day !!
Answer:
Chemical laws are those laws of nature relevant to chemistry. ... The laws of stoichiometry, that is, the gravimetric proportions by which chemical elements participate in chemical reactions, elaborate on the law of conservation of mass.
Explanation:
When chemists convert ethene (C2H2) to ethanol (CH3CH2OH), they have a mixture of the two gaseous substances. Why do chemists then lower the temperature of the mixture?
Answer:
to collect liquid ethanol and leave ethene as a gas because ethanol has hydrogen bonds
Explanation:
The chemist would be lesser than the temperature of the mixture as to collect the liquid ethanol and then leave ethene as a gas since the ethanol is a bond that should be hydrogen. Also -OH that available in the ethanol would be responsible for the hydrogen bonds also it is the main and significant molecular forice
So as per the given situation the above represent the answer
Answer:
to collect liquid ethanol and leave ethene as a gas because ethanol has hydrogen bonds
Explanation:
how many mercury atoms are contained in 0.37 moles of mercury?
Give some tips on how to take care of your microscope.
Answer:
dont get it wet or it wont work at all
What is an animal-like, unicellular protist called?
protozoan
euglenoid
slime mold
decompos
Answer:
protozoan
Explanation:
An animal - like unicellular protist is called a protozoan. Such organisms shows similarities with animals.
Protozoans are unicellular organisms. They are similar to animals in that they perform nearly all life functions that makes animals very unique. They are mostly heterotrophs which feed on foods that have been produced by autotrophs. Examples are flagellates and ciliates.Describe how wind, water, ice and gravity move soil through erosion below.
PLEASE ANSWER!!!! :D
Answer:
Most erosion is performed by liquid water, wind, or ice (usually in the form of a glacier). If the wind is dusty, or water or glacial ice is muddy, erosion is taking place. The brown color indicates that bits of rock and soil are suspended in the fluid (air or water) and being transported from one place to another. This transported material is called sediment.
Explanation:
we are lerning this tooo
Which of the following is an example of a velocity?
O A. 3 m/s south
O B. 2 km/hr
O C. 8 m/s
O D. 12 m/s2 east
Answer:
A
Explanation:
velocity is a vector quantity, it has single direction.
B and C are speed while D is acceleration
Please recheck, for this may not be the correct answer
Answer:
i think its A or C
Explanation:
pick repel,or attract. were its circled
If the [H+] of a solution is 6.8 x 10-9 mol/L the pH is
Answer:
8.2
Explanation:
To solve this problem;
The concentration of [H⁺] = 6.8 x 10⁻⁹mol/L
So, we need to convert this to pH:
pH = -log [H⁺]
So;
pH = -log 6.8 x 10⁻⁹ = 8.2
Question 6
Use the mole concept to calculate the number of formula units that are in a 1.75-mol sample of NaCl.
Answer: There are [tex]10.5\times 10^{23}[/tex] formula units in 1.75 mol sample of NaCl.
Explanation:
According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.
1 mole of NaCl contains = [tex]6.023\times 10^{23}[/tex] formula units
Thus 1.75 mol of NaCl contains = [tex]\frac{6.023\times 10^{23}}{1}\times 1.75=10.5\times 10^{23}[/tex] formula units
Thus there are [tex]10.5\times 10^{23}[/tex] formula units in 1.75 mol sample of NaCl.
Thomas calculates the volume of an object by multiplying the measurements 1.74 cm x 2.3 cm x 3.09 cm. Using significant figures, how should the answer be reported?
Answer:
12 cm³
Explanation:
Always round to the place of the number with the least amount of significant figures.
1.74 and 3.09 have three significant figures. 2.3 has two significant figures. Therefore, the answer will be rounded to two significant figures.
1.74 cm × 2.3 cm × 3.09 cm = 12.36618 -> 12 cm³
(The 3 in the tenths place is less than 5 so drop it and all the numbers to the right of it.)
Hope that helps.
Cu(NO3)2 is what compound?
Answer:
the compound's name is copper nitrate
according to the Aufbau principle, which principle energy level would have higher energy, n=2 or n=5?
Answer:b
Explanation:
The yard cat above is named "Yardley" for reasons obvious to his owner.
Yardley spends most of his time lounging in the back yard chasing
carpenter bees. But he could have been given any number of names
based on his appearance or behavior. Think for a few minutes. What
would you name him if he were your cat?
Answer:
For a cat name does matter as it keeps a charm when ever we call the name out. So it needs to be cherished as by a name so if it was me i would name it as Chinky.
What is the cation and anion for Aluminum chloride
Answer:
For, Aluminum chloride, aluminum = AL+ so here aluminum is the cation
But Chloride is the anion = CL -
So cation is positive and anion is negative
What is the concentration of H+ ions at a pH = 2?
mol/L
What is the concentration of OH– ions at a pH = 2?
mol/L
What is the ratio of H+ ions to OH– ions at a pH = 2?
: 1
Answer:
0.01M = [H⁺]; 1x10⁻¹²M = [OH⁻]; Ratio is: 1x10¹⁰
Explanation:
pH is defined as -log [H⁺]
For a pH of 2 we can solve [H⁺] as follows:
pH = -log [H⁺]
2 = -log [H⁺]
10^-2 = [H⁺]
0.01M = [H⁺]Using Keq of water:
Keq = 1x10⁻¹⁴ = [H⁺] [OH⁻]
1x10⁻¹⁴ / 0.01M = [OH⁻]
1x10⁻¹²M = [OH⁻]The ratio is:
[H⁺] / [OH⁻] = 0.01 / 1x10⁻¹² =
1x10¹⁰Answer:
1. 0.01 mol/L
2. 0.000000000001 mol/L
3. 10000000000:1
Explanation:
Complete the graphic organizer.
Basic Parts of an Atom
Answer:
I'm not sure but I think the answer is electrons, protons and neutrons.
what is a unique characteristic of covalent bonding between nonmetal atoms
a) atoms give away electrons to reach a stable octet
b)atoms share valence electrons with neighboring atoms to reach a stable octect.
c)atoms gain electrons to reach a stable octet
d)delocalized electrons move freely among many positive atoms creating a ''sea'' of electrons
Answer:
The answer isssssssssssssss DRUM ROLL PLEASEEE
Explanation:
B
Considering the definition of covalent bonds, the correct answer is option b): atoms share valence electrons with neighboring atoms to reach a stable octect.
Covalent bonds are the forces that hold non-metallic atoms together. These atoms have many electrons at their outermost level (valence electrons) and have a tendency to gain electrons rather than give them up, to acquire the stability of the noble gas electronic structure. Therefore, non-metallic atoms cannot give electrons to each other to form ions.
In other words, a covalent bond is a force that joins two atoms of non-metallic elements to form a molecule. Atoms share pairs of electrons from their most superficial shell (called the valence shell) to achieve the stability of the molecule that has been formed with the bond and thus comply with the octet rule.
In summary, the correct answer is option b): atoms share valence electrons with neighboring atoms to reach a stable octect.
Learn more:
https://brainly.com/question/12661797?referrer=searchResultshttps://brainly.com/question/7591319?referrer=searchResultsWhich are reasons to create a study schedule? Check all that apply.
to prevent scheduling conflicts
to help meet deadlines
to study more efficiently when tired
to maintain a consistent schedule
to set aside enough time for studying
Mark this and return
Answer - A, B, D, E
to prevent scheduling conflicts
to help meet deadlines
to maintain a consistent schedule
Calculate the percentage composition of Aluminum, Sulfur & Oxygen in the compound of Al(SO4)3
Answer:
Percentage of O = 56.1 %
Percentage of Al =15.8%
Percentage of S = 28.1 %
Explanation:
Given compound Al₂(SO₄)₃
Molar mass of compound:
27×2 + 32×3 + 16×12 = 342 g/mol
Percentage of Al = ( Mass of Al / Total mass ) × 100
Percentage of Al = 54 /342 × 100
Percentage of Al =15.8%
Percentage of S = ( Mass of S / Total mass ) × 100
Percentage of S = 96 /342 × 100
Percentage of S = 28.1 %
Percentage of O = ( Mass of O / Total mass ) × 100
Percentage of O = 192 /342 × 100
Percentage of O = 56.1 %