Chemistry High School
Answers
Answer 1
Answer:
R is universal gas constant
It is has fixed value which would depend upon the units in which P,V and T expressed in the equation PV=nRT
R=
nT
PV
Answer 2
Answer:
value of R=0.0821atm,mol-¹k-¹
Related Questions
Which of the following statements BEST describes a mixture?
А
Carbon dioxide is an example of a heterogeneous mixture.
B
A compound and a mixture are the same type of substance.
Two elements that are in the area but not chemically combined can be a mixture.
D
A mixture is unable to be separated because the molecules have been chemically combined.
Answers
Answer: C) Two elements that are in the area but not chemically combined can be a mixture
==============================================================
Explanation:
An example of a mixture would be salt and water. The salt particles dissolve into the water but no chemical change has happened. I mean that no new chemical compound is made and also heat/energy is not given off. Furthermore, we can separate the two items (for instance through evaporation) and those two items retain their original properties. This helps show that the salt and water particles don't form a bond and we can separate those particles apart so to speak.
Another example of a mixture is iron and plastic. We can pull out the iron through using a strong magnet. Whether or not the iron is with the plastic, the iron retains its properties. The same can be said of the plastic. The two materials just happen to occupy the same space or volume or area.
If you have two chemicals react in some way to form a new chemical, then this is not a mixture. For instance if we combine vinegar and baking soda, it produces carbon dioxide and water. There isn't a process to undo this to get the vinegar and baking soda back (like there was a process to get the iron separated).
CO2
What is the type of bond
Answers
has two covalent bonds between each oxygen atom and the carbon atom
How do animal behaviors, such as hibernation or migration, enhance their survival?
Answers
Answer:
the reason a lot of animal ether hibernate is because they are escaping the cold or looking for food and the only reason we Humans don't hibernate is for two reasons. Firstly, our evolutionary ancestors were tropical animals with no history of hibernating: humans have only migrated into temperate and subarctic latitudes in the last hundred thousand years or so.
Explanation:
A brand of soda has one of the highest quantities of sugar among popular soda drink packing 52 grams into each 12 oz can how many molecules of sugar are in one can of this soda
Answers
Answer:
9.0 × 10²² molecules of sugar (sucrose)
Explanation:
Step 1: Given and required data
Mass of sugar in each can of soda (m): 52 gMolecular formula of sugar (sucrose): C₁₂H₂₂O₁₁Molar mass of sucrose (M): 342.3 g/mol
Step 2: Calculate the moles of sugar (n) in each can
We will use the following expression.
n = m/M = 52 g / (342.3 g/mol) = 0.15 mol
Step 3: Calculate the molecules corresponding to 0.15 moles of sugar
We will use Avogadro's number: there are 6.02 × 10²³ molecules in 1 mole of molecules.
0.15 mol × 6.02 × 10²³ molecules/1 mol = 9.0 × 10²² molecules
When having an equal number of protons and electrons, what does that do to the overall charge of the element? Why do you think that?
Answers
It means it’s neutrally charged! Protons are positive while electrons are negative, so they balance each other out. Neutrons are neutral so they don’t weigh in.
type the correct answer in each box balance the equation
Answers
Answer:
5SiO2 + 2CaC2 ➡ 5Si + 2CaO + 4CO2
Explanation:
This question involves balancing the above equation. An equation is said to be BALANCED when all the atoms of each element in the reactant side equates that in the product side.
According to this question, a chemical reaction is given as follows: SiO2 + CaC2 = Si + CaO + CO2. Based on observation, the atoms of elements are Silicon, oxygen, calcium and carbon are not the same on the reactants and products side. Based on this, the balanced equation is:
5SiO2 + 2CaC2 ➡ 5Si + 2CaO + 4CO2
All generators need some source of energy to rotate the coil or magnets.
True or False
Answers
.energy mechanical needs it Answer:
Yes.
Explanation:
Which elements are;
a)solids,
b)liquids
c)gases
at 25°C
Answers
C. I am pretty sure don’t get mad if it’s wrong
butane reacts with chlorine to form two isomers of chlorobutane. What type of reaction is this?
Answers
I believe it it a chemical reaction...hope this helps and you make a good grade :
How many grams of sand (SiO,) would need to be weighed out to equal 0.3 moles?
Answers
Answer: 0.033286565708512 I think I’m not sure tho
What are three facts about facilitated diffusion?
Answers
Answer:
you need my help come over
Explanation:
Select all the correct answers.
Why do the atoms in a piece of copper metal have no net charge?
1.The charges of the positive and negative copper ions cancel each other out.
2.The number of electrons surrounding each copper nucleus doesn’t change.
3.Copper atoms can’t lose electrons without a substance present to gain electrons.
4.When a copper atom loses electrons, it also loses a corresponding number of protons.
5.The copper atoms exchange neutrons instead of electrons.
Answers
Answer:
The correct answer is the charges of the positive and negative copper ions cancel each other out.
Explanation:
A copper metal having no net charge means that it is a neutral atom. A neutral atom means that total number of protons is equal to the total number of electrons.
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CONVERT 65 GRAMS OF OXYGEN TO MOLES.
IM CONFUSED !
IF YOU ANSWER THIS I NEED THE STEP OF HOW YOU FOUND IT TOO!!! AND WHY THAT IS THE ANSWER TOO!!!!!
Answers
4 moles
64 grams of oxygen contains 4 moles
Answer:
4 moles
64 grams of oxygen contains 4 moles
Explanation:
The following equation represents what type of chemical reaction?
2Ag + H2S → Ag2S + H2
A. Double Replacement
B. Single Replacement
C. Decomposition
D. Synthesis
Answers
Answer:
single replacement
Explanation: N/A
Carbon’s valence?Thanks for answer
Answers
Answer:
as in valence electrons? 5.
Answer:
Carbon has 4 Valence electrons
A light-year is a way to measure ______ in space.
O time
Odistance
PLS HELPPPPPPPPPPPPPPPPPPPPPPPPPLLLLLPL
Answers
Answer:
Distance
Explanation:
The light-year is a measure of distance, not time. It is the total distance that a beam of light, moving in a straight line, travels in one year.
Answer:
distance pooh <3
Explanation:
A small amount of liquid bromine is added to a container which is then sealed.
Br2 (l) " Br2 (g)
Answers
Answer:
This answer is....
Br2 (l)
Br2 (I) is the answer i think
What name is given to this type of diagram
Answers
Answer:
There's no graph attached to the question
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Answers
Answer:
a
Explanation:
[H+] for a solution is 1 x 10^-7 M. This solution is _____________.
A. acidic
B. basic
C. neutral
Answers
Answer:
the answer is C neutral
Explanation:
if the ph is lower then 7 its acidic
if its higher then 7 its basic
and a ph of 7 is neutral
Calvin shines a thin beam of light onto a material, and the light refracts. Which diagram best shows what happens to the light?
og in
Answers
Answer:
In goes in fractures (looks like broken angle)
Explanation:
Answer:
Has a broken angle and there are three arrows
Explanation:
I GOT IT RIGHT
how many atoms are in 3.5 moles of arsenic atoms?
Answers
Answer:
1 mol of atoms = 6.022 ×1023 atoms. 3.5mol × 6.022 × 1023 atoms 1mol = 2.11 × 1024 atoms =.........
Explanation:
2160.64 atoms!
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Which of the following best describes the distribution of the world’s food supply? Select all that apply.
Still unevenly distributed leaving millions starving to death.
Quickly changing to be evenly distribute based on humanitarian efforts.
Slowly changing to be slightly more evenly distributed based on humanitarian efforts.
Evenly distributed throughout the population of the world now.
Answers
Answer:
Slowly changing to be slightly more evenly distributed based on humanitarian efforts. Still unevenly distributed leaving millions starving to death.
Explanation:
6. Which change to a population would cause
increased competition among
its members?
SC.7.L.17.3
ES
an increase in population size
B a decrease in population size
© an increase in predation on the
population
D an increase of disease in the population
Answers
Answer:
B
Explanation:
Because I said so
Which of the following DOES NOT belong to the group?
A.eyes
B.mouth
C.large intestine
D.stomach
Answers
Answer:
eyes
Explanation:
It is because the mouth, large intestine and stomach comes in the digestive system abd eyes doesn't.
HOPE THIS HELPS
A. eyes
it doesn’t have anything to do w the others
the particle that move around the nucleus is are
Answers
Answer:
electrons
The nucleus contains two types of subatomic particles, protons and neutrons. The protons have a positive electrical charge and the neutrons have no electrical charge. A third type of subatomic particle, electrons, move around the nucleus. The electrons have a negative electrical charge
Explanation:
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If we start with 20 atoms of plutonium – 239, how many would remain after 48,240 years?
Answers
The amount of atoms of plutonium – 239 that would remain after 48240 years is 5 atoms
How to determine the number of half-lives Half-life (t½) = 24100 yearsTime (t) = 48240 yearsNumber of half-lives (n) =?
n = t / t½
n = 48240 / 24100
n = 2
How to determine the amount remaining Original amount (N₀) = 20 atomsNumber of half-lives (n) = 2Amount remaining (N) = ?
N = N₀ / 2ⁿ
N = 20 / 2²
N = 20 / 4
N = 5 atoms
Learn more about half life:
https://brainly.com/question/26374513
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If the temperature of a gas is 27.0°C when the volume is 1.25 L, what will the new volume be if the temperature is raised to 150°C?
Answers
Answer:
0.17166666666
Explanation:
Answer:
New volume V2 = 1.7625 L
Explanation:
Given:
Old temperature T1 = 27°C = 27 + 273 = 300 K
Old volume V1 = 1.25 L
New temperature T2 = 150°C = 150 + 273 = 423 K
Find:
New volume V2
Computation:
V1 / T1 = V2 / T2
1.25 / 300 = V2 / 423
New volume V2 = 1.7625 L
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Answers
sun powered is the correct answer i believe :)
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Answers
Answer:
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