Answer:
Converting Between Moles and Liters of a Gas at STP. To convert between moles and the volume of a gas at STP, we will use the factor label method discussed in the first unit. This conversions relies on the fact that a mole of gas at STP has a volume of 22.4 L.
Explanation:
One molecule of carbon dioxide at STP has a volume of 22.4 liters . Thus number of molecules of carbon dioxide in 12.2 L is 3.27 × 10²³ molecules.
What is one molecule?A molecule is formed by the combination of same or different kinds of atoms. A number molecules together form a compound. Water, carbon dioxide etc. are compounds.
One mole of a molecule contains 6.022 × 10²³ number of atoms. Similarly, one mole of a compound contains, 6.022 × 10²³ number of molecules.This number is called Avogadro number.
At standard temperature and pressure (STP) that is at 298 K and 1 atm pressure, one mole of any substance carry 22.4 L. Thus number moles of 12.2 L of carbon dioxide is 12.2 / 22.4 = 0.54 moles.
Number of molecules = 0.54 moles × 6.022 × 10²³
= 3.27 × 10²³
Hence, number of molecules of carbon dioxide in 12.2 L is 3.27 × 10²³ molecules.
To find more about Avogadro number, refer the link below:
https://brainly.com/question/11907018
#SPJ2
What determines an element's properties?
ANSWER: A. The valence electrons
A. The valence electrons
B. The isotopes it forms
C. Its atomic mass
D. The core electrons
Answer:
b
Explanation:
Why must ionic compound have a total charge of 0?
Which term represents a chemical reaction?
deposition
combustion
sublimation
vaporization
Answer:
vaporization
Explanation:
The forces that hold molecules of metals together are stronger than the forces that hold molecules of non -metals together. This means that metals have
Answer:
Stronger bond as compared to non metals
Explanation:
25.00 g of the compound is composed of 6.77 g of tin and 18.23 g of bromine. What is the percent by mass of tin in the compound? Show work.
The percent by mass of Tin : = 27.08%
Further explanationGiven
25.00 g of the compound
6.77 g of Tin
18.23 g of Bromine
Required
The percent by mass of Tin
Solution
Proust stated the Comparative Law that compounds are formed from elements with the same Mass Comparison, so that compounds have a fixed composition of elements
%mass X = (mass X/mass sample) x 100%
So %mass of Tin :
= (6.77 g : 25 g) x 100%
= 27.08%
Which statement best explains the net transfer of energy that is about to
happen in this photo?
A. The racket and the ball will both gain kinetic energy.
B. The ball will gain kinetic energy, and the racket will lose kinetic
energy
C. The racket will gain potential energy, and the ball will lose kinetic
energy
D. The racket and the ball will both lose potential energy
Answer:
Explanation:
B I got it right
Answer:
B. The ball will gain kinetic energy, and the racket will lose kinetic
energy
Explanation:
Which best describes the effect of a ecosystem when populations of white-tailed deer are overhunted by people in an area?
A. It disrupts the balance between predators and prey
B. It decreases the amount of producers
C. It directly increases the population of decomposers
D. It decreases competition for food among carnivores
Answer:
A. It disrupts the balance between predators and prey
Explanation:
The effect on the ecosystem when populations of white - tailed deer are overhunted is that it disrupts the balance between predators and prey within the ecosystem.
The whited - tailed deer is the usually the prey. The carnivores are the cats and other flesh eating animals. When the deer is over-hunted, there are more predators compared to prey. This leads to a serious imbalance and a high level of competition for the scarce prey.
WILL GIVE BRAINLIEST!!
In the Andes Mountains, how does energy flow in an ecosystem that contains grasses and shrubs, pumas, and guanacos?
guanacos to grasses and shrubs to pumas
grasses and shrubs to guanacos to pumas
pumas to grasses and shrubs to guanacos
pumas to guanacos to grasses and shrubs
Answer:
I could be wrong but I am pretty positive that the correct order is grasses and shrubs to guanacos to pumas.
Calculate the sodium ion concentration when 70.0 mL of 3.0
M sodium carbonate is added to 30.0 mL of 1.0 M sodium
bicarbonate.
Answer:
4.5 M Na+
Explanation:
Multiply the molarity by the volume of the solution to get moles.
Note that there are TWO sodium ions in sodium carbonate, therefore the first-mole calculation must be multiplied by two.
Since molarity is defined as moles of ions/liters of solution, the final molarity will be the sum of the calculated moles divided by the sum of the liters of solution.
Hope this helps :)
Does gasoline (C8H12) have polar or non-polar molecules?
Answer:
non polar molecules
Explanation:
Ethyl alcohol will dissolve in water in all proportions because the polar molecules interact with each other freely. In contrast, gasoline is a nonpolar molecule. hope that helped...
help plz and can you plz use terms
We are slowly learning that even if we react, it won't change anything, it won't make people suddenly love and respespect us, it won't magically change their minds. Sometimes it's better to just let things be, let people go, don't fight for closure, don't ask for explanations, don't expect people to understand where you're coming from. We are slowly learning that life is better lived when you don't center it on what's happening around you and center it on what's happening inside you instead.
Work on yourself and you inner peace.
Answer:
wow ok ill try to
Explanation:
this is the most beautiful thing ive seen all day
thank you
As the radius of a star increases, how do you think its mass might change?
Answer:
by wind
Explanation:
As the radius of the star increases, the mass will also increase.
This is all about the relationship between the radius and mass of stellar main sequence stars.
Now, usually they are expressed in solar units and as such as seen in the graph image attached, the relationship between the radius(R) and mass(M) of a main-sequence star is seen by the curve attached. It is clear that the higher the radius becomes, the larger the mass of the star also becomes.
To clarify this also, we have a mass - lumosity relationship formula where given as;
L = [tex]M^{3.5}[/tex]
Where;
M is mass
L is lumosity
We know from basics of stellar main sequence stars, that a larger radius gives a much brighter lumosity.
From the mass-lumosity formula, we see that Increase in lumosity is directly proportional to an increase in mass. Therefore in the same vein, we can say that increase in radius is directly proportional to an increase in mass.
read more at; brainly.com/question/20400571
Fe0 + 2H+1 Cl-1 → Fe+2 Cl2 -1 + H20 ↑
De acuerdo con la ecuación planteada si se cambia el hierro Fe por dos moles de sodio Na0 probablemente formará
A. 2NaCl + H2
B. NaCl + H2
C. 2NaH + Cl2
D. NaCl2 + H2
Answer:
A and the answer if we can manage by its formula NaCl H2 but the answer is A
The complete combustion of acetic acid, HC2H3O2(I) to form water, H2O(I), and CO2(g), at constant pressure releases 871.7 kJ of heat per mol of acetic acid.
Write a balanced thermochemical equation if 5.0g of acetic acid will be used in the reaction.
HC2H3O2(I) + O2 --- H2O(I) + CO2(g) H= -871.7 kJ
Answer:
HC2H3O2(I) + O2(g) ---> H2O(I) + CO2(g) ΔH= -72.35 kJ
Explanation:
We know that 5.0 g of acetic acid will contain, 5.0g/60 g/mol = 0.083 moles of acetic acid
Now from the reaction equation;
1 mole of acetic acid evolved -871.7 KJ of heat
0.083 moles of acetic acid will evolve 0.083 * -871.7 = -72.35 KJ
For 5.0 g of acetic acid, we can write;
HC2H3O2(I) + O2(g) ---> H2O(I) + CO2(g) ΔH= -72.35 kJ
What is the balanced chemical equation for Nitric acid with sodium carbonate
Answer:
Nitric acid reacts with sodium carbonateto form sodium nitrate, carbon dioxide and water. 2HNO3+Na2CO3→2NaNO3+CO2+H2O.
which one would it be?
Answer:
1 chlorine and 2 hydrogen
Explanation:
because in the picture you already have a hint wichbis chlorine so that eliminiates C and D
and its 2 hydrogens because if it were 1 then there wouldn't be anything adding in the chemical equation
1.2 dkg to grams now I have to say extra stuff for it to submit
Answer:
12 grams and I have to write something longer so just ignore this
Radio waves are used to transmit information on various channels. What is the wavelength of a radio wave having the frequency of 5.40 × 1010 Hz?
1. Analyze the Problem
ν = and c = Unknown: λ =
You know that because radio waves are part of the electromagnetic spectrum, their speed, frequency, and wavelength are related by the formula c = λν.
Answer:
5.56×10¯³ m
Explanation:
From the question given above, the following data were obtained:
Frequency (v) = 5.4×10¹⁰ Hz
Wavelength (λ) =?
The velocity of electromagnetic wave, frequency and wavelength are related according to the equation:
Velocity (c) = wavelength (λ) × frequency (v)
c = λv
With the above formula, the wavelength of the radio wave can be obtained as follow:
Frequency (v) = 5.4×10¹⁰ Hz
Wavelength (λ) =?
Velocity (c) = 3×10⁸ m/s
c = λv
3×10⁸ = λ × 5.4×10¹⁰
Divide both side by 5.4×10¹⁰
λ = 3×10⁸ / 5.4×10¹⁰
λ = 5.56×10¯³ m
Thus, wavelength of the radio wave is 5.56×10¯³ m
Calculate the theoretical yield for your reaction. {This is your predicted mass of CuO produced based on the starting mass of CuCO3Cu(OH)2}
Identify the Experimental Yield of your reaction (the amount that actually got produced and measured)
Calculate the percent yield of your reaction (refer to the introduction)
Evaluate your percent yield – state at least one legitimate reason your yield could be higher or lower than 100%. Be specific (the experimental error is not specific enough, for example)
Answer:
CuCO3Cu(OH)2 overlapping yield calculate itCuCO3Cu(OH)2 overlapping yield calculate it
holy sheesh dude
Explanation:
CuCO3Cu(OH)2 overlapping yield calculate it
what is the name and classification of a six sided molecule with oh attached
In which of the following locations are bacteria often found?
Answer:
in the air and soil
in drinking water
on and inside the human body
Explanation: Hope that helps
Which of the following represents a solution? *
2 points
NaCl (s)
HCl (aq)
H2O (g)
HBr(g)
Answer:units of G.
Explanation:Milk of magnesia, a suspension of Mg(OH)2
in water, reacts with stomach acid (HCl) in a
neutralization reaction.
Mg(OH)2(s) + 2HCl(aq) −!
2H2O(l) +MgCl2(aq)
What mass of MgCl2 will be produced if
4.55 g of Mg(OH)2 reacts?
Answer in units of g.
021 (part 2 of 2) 10.0 points
What mass of HCl is required to completely
react with 4.55 g of Mg(OH)2?
Substance X has a specific heat capacity that is twice as large as Substance Y. If both samples ended up at the same change in temperature from the same amount of energy added, what is the relationship between the masses of the two samples? Explain.
Answer:
Substance X has a smaller mass
Explanation:
The relationship between the mass of the two samples is that the mass of X is smaller compared to the mass of Y.
The specific heat capacity is given as:
C = [tex]\frac{H}{m x change in temperature}[/tex]
We can see that the higher the specific heat capacity the lesser the mass or simply put, the specific heat capacity of a body is inversely related to its mass.
If the amount of heat is constant i.e the same and the specific heat capacity of X is twice that of Y, then substance X has a smaller mass
The table shows the recipe and the available ingredients for making the maximum possible number of sandwiches.
Making Sandwiches
Recipe for One Sandwich
Total Ingredients Available
1 cheese slice, 2 lettuce leaves, 2 bread slices Total ingredients available: 8 cheese slices, 6 lettuce leaves, 6 bread slices
If the ingredients represent reactants of a chemical reaction, which of the following represents the leftover reactant?
OTwo cheese slices
Two lettuce leaves
Five lettuce leaves
Five cheese slices
Answer:
5 Cheese Slices
Explanation:
I took the quiz and got it right.
Answer:
Five cheese slice
Explanation:
8-1-1-1=5
Which of the following atoms would have a charge of +1?
An atom with 9 protons, 9 electrons, and 9 neutrons
An atom with 7 protons, 11 electrons, and 8 neutrons
An atom with 5 protons, 5 electrons, and 4 neutrons.
An atom with 6 protons, 5 electrons, and 7 neutrons
Answer: An atom with 6 protons, 5 electrons, and 7 neutrons
Explanation: In this case, neutrons do not matter as they have a charge of 0, or no charge. A proton has a charge of +1 and an electron has a charge of -1. Since there are 6 protons, the total charge of the protons would be +6. Since there are 5 electrons the total charge of the electrons would be -5. +6 - 5 would result in a charge of +1. This means that this atom would have an overall charge of + 1. Basically, if there is one more proton than electron, then the overall charge of the atom will be +1 but if there is one more electron than proton, then the overall charge of the atom will be -1.
In the reaction Cu(s) + 2 AgNO3(aq) -> 2 Ag(s) + Cu(NO3)2(aq) how much Ag can be produced from 49.1 g of copper
Answer:167.9 g Ag
Explanation: 1 mol Cu + 2 mol AgNO3 = 2 mol Ag + 1 mol Cu(NO3)2
63.55 g Cu —> 2*107.688 g Ag
So 49.1 g Cu —> (49.1/63.55)*2*107.688 = 167.9 g Ag
Ionic bonds form between _____ which form positively charged ions and _____ which form negatively charged ions.
ionic bonds form between metals which form positively charged ions and nonmetals which form negatively charged ions.
Question 3
True or False. You must convert grams to moles to do stoichiometry.
True
оо
D
False
Answer:
True
Explanation:
Sometimes you will need to convert from grams to moles, or moles to grams
Fe2 O3 = Al =Fe Al2 O3
you will need to be sure to count all of atoms on each side of the chemical equation. Once you know how many of each type of atom you can only change the coefficients (the numbers in front of atoms or compounds) to balance the equation for Aluminum + Iron (II) oxide