Answers
Answer:
Proton
Explanation:
It has a positive charge
Answer:
electron
Explanation:
Related Questions
what is the wave speed if the wave length is 8 and the frequency is 20
Answers
Answer:
160m/s
Explanation:
To find V Use the following formula V= F*W
V= Velocity F= Frequency W= Wavelength
V=20*8
=160m/s
Sodium chloride is a ____ substance because the atoms within are arranged in repeating patterns.
work bank
- crystalline
- hydrogen bonds
- hydrophilic
- hydrophobic
- polar molecule
- solvent
Answers
How many moles are there in 4.7 x 10^24 molecules of water?
Answers
Answer:
7.81 moles
Explanation:
(4.7×10^24 )×1 moles divided by 6.02×10^23 molecules
A gas tank contains 2.5 moles of oxygen, 7.0 moles of nitrogen and 0.5 mole of water vapor. The total pressure of the mixture is 852 torr. Calculate the partial pressure of each gas. Show work.
Answers
Answer:
The partial pressure of each gas is:
Oxygen= 213 torrNitrogen= 596.4 torrWater Vapor= 42.6 torrExplanation:
The pressure exerted by a particular gas in a mixture is known as its partial pressure. So, Dalton's law states that the total pressure of a gas mixture is equal to the sum of the pressures that each gas would exert if it were alone:
PT = PA + PB
This relationship is due to the assumption that there are no attractive forces between the gases.
Dalton's partial pressure law can also be expressed in terms of the mole fraction of the gas in the mixture. The mole fraction is a dimensionless quantity that expresses the ratio of the number of moles of a component to the number of moles of all the components present.
The mole fraction of a gas in a gas mixture is given by:
XA = nA / nT
This fraction will always be less than 1.
So in a mixture of two or more gases, the partial pressure of gas A can be expressed as:
PA = XA * PT
In this case, you know:
number of moles of oxygen= 2.5 molesnumber of moles of nitrogen= 7.0 molesnumber of moles of water vapor= 0.5 molesSo, the number of total moles nT is calculated as:
nT= number of moles of oxygen + number of moles of nitrogen +number of moles of water vapor
Then:
nT= 2.5 moles + 7.0 moles + 0.5 moles
nT= 10
So, the mole fraction of the gas in the mixture is:
mole fraction of oxygen = [tex]\frac{2.5 moles}{10 moles}[/tex] = 0.25mole fraction of nitrogen = [tex]\frac{7 moles}{10 moles}[/tex] = 0.7mole fraction of water vapor = [tex]\frac{0.5 moles}{10 moles}[/tex] = 0.05Being the total presurre (PT) equal to 852 torr, then:
Poxygen= 0.25*852 torr= 213 torrPnitrogen= 0.7*852 torr= 596.4 torrPwater vapor= 0.05*852 torr= 42.6 torrThe partial pressure of each gas is:
Oxygen= 213 torrNitrogen= 596.4 torrWater Vapor= 42.6 torrIf 1.85 g of Mg(OH)2 reacts with 3.71 g of HCl,
how much MgCl2 is produced? What is the limiting
reactant?
If 5.26 L of nitrogen monoxide and 7.64 L of oxygen
are combined, what mass of nitrogen dioxide is
formed? Assume conditions are STP.
If 18.1 g of silicon tetrachloride reacts with 8.4 L of
hydrogen at STP, what mass of silicon is formed?
What mass of Cu(OH)2 is produced in the reaction of
7.6 g Cu(NO3)2 with 6.2 g of KOH?
What mass of carbon dioxide is formed when 64 kg
of ethylene is burned in 142 kg of oxygen?
please show work any answered question is helpful
Answers
HELP!!!!!!!! 15 points and BRAINLIEST
Answers
Answer:
1 HBr + 1 KOH -> 1 KBr + 1 H2O
Explanation:
which of the following methods of making electricity results in dangerous radioactive waste
A. Solar energy
B. Nuclear energy
C. Geothermal energy
D. Wind energy
Answers
Answer:
B. Nuclear energy
Explanation:
What would be the volume, in liters, of 85.5 grams of carbon monoxide at STP?
Answers
someone help ,, I'll give brainliest lolll .
Answers
Answer:
the correct answer is c, how easily something catches flames
Mikala pours a tablespoon of salt into a beaker of water. Diffusion will cause the salt molecules to dissolve in the molecules of water. How could Mikala increase the diffusion rate of the salt molecules?
A. Mikala could remove all sources of light from the beaker.
B. Mikala could slowly pour more water into the beaker.
C. Mikala could decrease the temperature of the solution.
D. Mikala could increase the temperature of the solution.
Answers
Explanation- diffusion rates increase at higher temperatures!
why is it necessary to specify temperature when giving Ka value
Answers
Answer:
Because the equilibrium constant is only at constant at temperature. Changing the temperature changes the Ka.
2.00 L of a gas is collected at 25.0°C and 745.0 mmHg. What is the volume at 760.0 mmHg
and 273K?*
Answers
1.7960L
Explanation:
the mass of the gas is constant in both instances
pv/T=constant(according to pv=nRT)
745mmHg*2L/298K=760mmHg*v/273K
v=1.7960L
What element should I do a project on?
Answers
Answer:
Project scope statement?
Explanation:
it's good one just do research on it
what is the name of the part of a cell that allows molecules in in, such as glucose and oxygen?
Answers
Answer:
A plasma membrane is permeable to specific molecules that a cell needs. Transport proteins in the cell membrane allow for selective passage of specific molecules from the external environment. Each transport protein is specific to a certian molecule (indicated by matching colors).
3 – Simple Diffusion Across the Cell (Plasma) Membrane: The structure of the lipid bilayer allows small, uncharged substances such as oxygen and carbon dioxide, and hydrophobic molecules such as lipids, to pass through the cell membrane, down their concentration gradient, by simple diffusion.
Or Cell Membrane
Explanation:
Hope This HElp??
Please MArk Me Brainly!!
What property of water accounts for its ability to insulate areas around it?
Answers
Answer:
Floating ice can insulate bodies of water. Answer: b. Discuss how a high specific heat helps to buffer temperature for organisms. Water's high specific heat is important to life because...
Explanation:
All of the following increases down the group except one
A metallic character
B atomic size
C electropositivity
D ionization energy
Answers
Answer:
B: Atomic size
Explanation:
I just guess for the points
PLSSSSSSSS ANSWERRRRR
Answers
Propane, C3H8, a fuel used in many outdoor grills, burns in oxygen to produce carbon dioxide gas, CO2, and water vapor, H2O, as shown in the reaction below. If 2.0 mol of propane are burned (reacted with oxygen), how many moles of carbon dioxide will be produced?
Answers
Answer:
6 moles of CO₂
Explanation:
We'll begin by writing the balanced equation for the reaction. This is illustrated below:
C₃H₈ + 5O₂ —> 3CO₂ + 4H₂O
From the balanced equation above,
1 mole of C₃H₈ reacted to produce 3 moles CO₂.
Finally, we shall determine the number of mole of CO₂ produced by the reaction of 2 moles of C₃H₈. This can be obtained as follow:
From the balanced equation above,
1 mole of C₃H₈ reacted to produce 3 moles CO₂.
Therefore, 2 moles of C₃H₈ will react to produce = 2 × 3 = 6 moles of CO₂.
Thus, 6 moles of CO₂ were obtained from the reaction.
Jimmy is walking down the street and he notices that there is a small tree that has been uprooted from the ground. What two spheres are interacting in this scenario? *
Answers
Answer:
Explanation:,.....
Explanation is in the file
tinyurl.com/wpazsebu
Why is copper a good electrcity conducter
Answers
Explanation:
HOPE IT WILL HELP YOU TO SOLVE YOUR PROBLEM.Answer:
Each copper atom has lost one electron and become a positive ion. ... The electrons can move freely through the metal. For this reason, they are known as free electrons. They are also known as conduction electrons, because they help copper to be a good conductor of heat and electricity.
PLEASE WILL MARK BRAINLYIST
Answers
Answer:
3 i am pretty sure make me brainy i gust
Explanation:
What is a catalyst and why is it used in chemical reactions?
Answers
Answer:
A catalyst is a substance that can be added to a reaction to speed up the process without being absorbed by it. Catalysts usually work by lowering the activation energy or modifying the mechanism of a reaction. Proteins that act as catalysts in biochemical reactions are known as enzymes.
Explanation:
Iron + --> iron sulphate + copper What is missing ? Iron sulphate Copper sulphate Copper oxideIron oxide
Answers
Answer:
Copper Sulphate is missing
Your teacher takes a candle and cuts some wax from the bottom of it. She puts a bit of wax in a beaker and places it on a hot plate. Eventually, the wax melts and becomes a liquid. Do you think this a physical or a chemical change? Explain.
Answers
Answer:
It is a chemical change
Explanation:
Melting of wax is temporary and wax can settle again on cooling and turns into a solid. ... Hence it is a chemical change.
Answer:
physical
Explanation:
the wax is changing it's physical state by becoming a liquid, it isn't changing it's chemical makeup
The orbits of the planets in our solar system are
not
a Elliptical, circular
b Circular, elliptical
C Circular, oval
d None of the above
Answers
Answer:
A
Explanation:
I don't know how to say how I got it.
Answer:
d
Explanation:
the orbits of the planets in our circular elliptical and circular
Which of the following is a characteristic of a scientific theory
1. It explains how nature works.
2. It is based on a single experiment.
3. It should not be possible to replicate its results.
4. It should not be possible to replicate its observations.
NEED URGENT!!!!!
Answers
Answer:
number one
Explanation:
hope I helped
will mark BRAINLYIST
please help
Answers
1.00mol is the correct answer
Can i get some help?
Answers
Answer:
Rabbit
Explanation:
I said rabbit because the snake feeds off the rabbit and that's where he gets his energy from. If the question asked you what is the primary source of energy in this food chain then the answer would be the sun. Since the question only asks you about the snake then the rabbit is the answer.
Hope this helps!
If parents wanted to pick their child's traits like hair color, gender, eye color, what would doctors have to do?
Answers
Answer:
Nothing
Explanation:
I would say this because the parents are picking the baby's traits and they make all the decisions. And i guess the doctor would have to follow the traits, if i'm right i tried
It’s cold outside and you decide to cook some pasta. As you boil the noodles, the kitchen window begins to fog up. Which processes are at work here?
boiling and freezing
vaporization and condensation
evaporation and thawing
condensation and evaporation
Answers
Answer:
condensation and evaporation
Explanation:
condensation forms when warm humid air contacts cold surface. during cold months.