Answer:
252 Joules
Explanation:
I thin k this is right, im so sorry if not!! :)
what is the number of atoms in 7.25 moles of potassium?
Answer:
4.37*10^24 atoms of K
Explanation:
1 mol=6.022*10^23 atoms (Avogadro's number)
To convert from mols to atoms multiply the mols of K by Avogadro's number.
7.25 mol K * 6.022*10^23 atoms = 4.36595*10^24 atoms
The variable that we change or test in an experiment is called the
A) Dependent variable
B) Independent variable
C) Constant
the variable that we change in an experiment is the Independent Variable. The dependent variable is the outcome and the constant is what remains the same throughout the experiment.
Which of the following are characteristics of a gas? (Select all that apply.)
It has a fixed shape.
It moves slowly.
It has a fixed volume.
It can be compressed.
Answer:
it has a fixed volume it can also be compressed
Explanation:
a gases molecules don't move slow because they are not solid and are not compacted.
a gas does not have a fixed shape because there is nothing to hold its shape
Answer: I would say the last one only
Explanation:
Cuz Gases have the following characteristics:
no definite shape (takes the shape of its container)
no definite volume
particles move in random motion with little or no attraction to each other
highly compressible
What is the difference between a theory and a scientific law?
Think of it like theory and physics.
A theory is an idea that needs to be tested.
Scientific law is something that cant be proven wrong.
What are the subatomic particles of an atom, and where are they located in the atom? Be specific.
Answer:
120
Explanation:
just took test
Katie looks out her bedroom window on a clear night. The stars in the sky look like tiny points of light.
Katie knows that the Sun is also a star, but it looks much larger than all of the other stars in the sky.
Why do the stars in the night sky look so much smaller than the Sun?
Answer:
The Sun looks bigger than other stars because its more closer to the earth than the stars.the farther anything is distant from us the tinier it will look
Explanation:
plz mark brainliest if thats ok|?
If the roller coaster car in the above problem were moving with twice the speed (4m/s), then what would be its
new kinetic energy?
Explanation:
New kinetic energy= ½mv'²
v' =4m/s
m= 2000kg
KE = ½ (2000) (4)²
=16000 Joules
List two differences between a map and a giobe
Answer:
1. A map is two dimensional, while a globe is three dimensional
2. A globe is a scaled down representation of the entire Planet Earth. A map can represent an area of any size.
Explanation:
1. A map is usually a sheet of rectangular paper that is a flattened image of an area as seen from the top. A globe on the other hand is a sphere which is a 3D shape.
2. Earth is in the shape of a sphere, so Globes are a smaller representation of the planet. A map can be for a city, state, country, or the world.
how do i convert 9.5125 liters to gallons
Answer:
That would be 2.51293615
Explanation:
1 liter is equal to 0.264172 gallons.
What you would need to do is, multiply the total number of liters, which in this case is 9.5125, by 0.264172.
9.5125 x 0.264172 gets you 2.51293665.
I hope this helps! :)
Which two of these formulas have an equal number of carbon atoms present?
1 - MG3(PO)2
2 - Na SO4
3 - NO3(CH3)3
4 - C&H 206
5 - Al(NO3)3
3 and 4
1 and 2
3 and 5
3, 4, and 5
Choose the correct answer.
Answer:3 and 4
Explanation:I got it right on a quiz.
Answer:
3 & 4
Explanation:
MARKING BRAINLIEST! HURRY!!
Read the following list of objects:
a flying insect, a stretched elastic band, a falling stone, a flowing river, a coiled spring
Which of the objects have only potential energy?
A flying insect, a coiled spring
A stretched elastic band, a coiled spring
A falling stone, a flying insect
A flowing river, a flying insect
Answer:
a coiled spring
Explanation:
How do you define note-taking and how do you take notes to help you understand the material?
Answer:
Note-taking is simply jotting down the steps to solve specific problems, or listing the resources that can help you when learning something new. In order to take effective notes that can help you understand the material, you can use techniques like Cornell Notes which help you to organize your writing in a way that makes it referable when stuck doing independent work.
The substance that is dissolved in another substance to create
a solution is called the
Answer:
The substance that is dissolved in another substance to create a solution is a Solute. A Solute is a minor component in a solution which is a substance that is being dissolved, while the solvent is the dissolving medium. Solutions can be formed with many different types and forms of solutes and solvents.
Calculate the osmolarity of a 1.15% (m/v) KBr solution.
Answer:
1) Convert percent (m/V) to molarity
percent (m/V)=1.15 grams/100ml=1.15 g/0.1L=11.5g/L
molarity of KBr=mol/L=g/L *(1mol/molecular weight of KBr)=(11.5g/L) * (1mol/119.0g/mol)=0.0966 mol/L=0.0966M
2) calculation of osmol from mol
In solution, KBr dissociates into two ions K+ and Br- so there are 2 osmol of KBr per mol
3) calculation of osmolarity=molarity*2=0.0966*2=0.193 Osm or Osmolar
Explanation:
brainliest would be appreciated.
Write the chemical formula for the ionic compound formed by aluminum and chlorine.
Answer:
AICI3
one aluminum and three chlorine
Answer:
→
[tex]{ \rm{AlCl _{3} }}[/tex]
Explanation:
Equation:
[tex]{ \rm{2Al_{(s) } + 3Cl _{2(g)} \dashrightarrow \: 2AlCl _{3(s)}}}[/tex]
♔♔Can water stay liquid below zero degrees Celsius?✞♡♡♡
Answer:
Yes, water can stay liquid below zero degrees Celsius. There are a few ways in which this can happen. The freezing point of water drops below zero degrees Celsius as you apply pressure. When we apply pressure to a liquid, we force the molecules to get closer together.
Explanation:
Hope this helps you. Have a nice day.^_^
Please mark as brainliest. It helps a lot:)
Answer:
yes water can stay liquid below 0 ° Celsius
Look at diagram 2 above. What type of eclipse is shown based on the alignment of the Earth, Sun, and Moon?
Solar eclipse
Lunar eclipse
Answer:
solar eclipse is when the sun hits earth and lunar means moon or when the sun hits the moon for an eclipse
Explanation:
??????????????????????????????????????
Answer:
c. saturated
d. unsaturated
e. The solute isn't in the table G, so it is impossible to know
f. saturated
g. saturated
h. supersaturated
4. About 73 g
5. About 55 °C
6. About 58 °C
one two three four five six
Answer:
7
8
9
10.
better check book pages for this kinda answer.
Please help me with the following question below:
Molarity as Stoikiometri
Level : SHSEquatuions od Molarity :
M = m/Mr × 1000/V
Mr Lithium Dichromate (Li2CrO4)
= Ar Li (2) + Ar Cr + Ar O (4)
= 7 (2) + 52 + 16 (4)
= 14 + 52 + 64
= 130 g/mol
Molarity
= m/Mr × 1000/V
= 19.5 g/130 g/mol × 1000/95 mL
= 0.15 mol × 10.53 /L
= 1.5795 mol/L
So, the molarity of the solution is 1.5795 mol/L
#LearnWithEXO
how many molecules of oxygen are needed to make 3.5 oxygens of water?
Answer:
57.6g
Explanation:
So, if in one mole of water, 16 g of oxygen atom is present. Then, in 3.6 moles of water, the mass of oxygen present will be 3.6×16=57.6g. Therefore, the amount of oxygen present in 3.6 g water is option (B)- 57.6 g.
Label the molecular view.
Label the species in the atomic-scale picture to represent the result when equimolar amounts of
aqueous barium hydroxide and aqueous iron(II) chloride are combined.
Ba
FeCl2
Fe(OH)2
Ba(OH)2
Ba2-
Cl2
CI
Fe
BaCl2
Fe2-
OH
H2O
solid =
Fe(OH)2
The elements should be label as follows yellow = OH, blue = Fe, green = Ba, red = Cl
The mix between aqueous barium hydroxide and aqueous iron chloride leads to barium chloride and iron hydroxide. This reaction is shown below:
Ba(OH)2 + FeCl3 → BaCl2 + Fe(OH)3Moreover, in these products, the iron hydroxide will form a solid substance that precipitates in the bottom of the container, while the barium chloride is more likely to maintain its liquid state.
According to this, the substance in the bottom is the iron hydroxide or Fe (OH)2, and in this, the yellow dots represent the Hydroxide or OH, while the blue dots are the Iron considering there in iron hydroxide there are two molecules of OH for each molecule of iron.
On the other hand, at the top, there is the barium chloride or BaCl2. This means the green dots are the Barium and the red ones are the Chlorine as there should be more Chlorine particles than Barium ones
Learn more in: https://brainly.com/question/19595631
HELP!! please choose all the correct answers, picture attached
What types of safety procedures need to be followed when handling and transporting nitric acid?
Answer:
wear safety glasses, a face shield, gloves.
Explanation:
Nitric Acid Safety, Handling & First Aid When handling nitric acid in the workplace, we strongly recommend you wear chemical safety glasses, a face shield for splash protection, gloves, and an approved vapor respirator if adequate ventilation is not available. I found this online. Hope it helps!
what is the answer to (x+3)=4
Answer:
1
Explanation:
x + 3 =4
subtract 3 from 4
You are left with one.
Plug in the answer
1+3=4
An automatic response of the body that occurs very rapidly and with-out conscious control is called
Answer:
Reflex.
Explanation:
Because it can occur very rapidly and without conscious control.
Turn on "Show formula". What is the formula of this compound?
Answer:
you can find the answer in this link
https://www.coursehero.com/file/p4kfbhi5/B-Turn-on-Show-formula-What-is-the-formula-of-this-compound-Li2O-C-Turn-on-Show/
An image of Earth's layers is below
What is layer C?
Crust
Mantle
Inner core
Outer core
Answer:
the mantle is layer C.
Explanation:
the crust would be layer A. inner core would be layer D. outer core would be layer B.
Which describes an element?
They can combine with other elements to form atoms.
They were all discovered at the same time.
They cannot be broken down any further.
the modern periodic table is organized by increasing ______________ ___________.
Answer:
atomic number.
Explanation:
Answer:
Atomic number
Explanation:
The modern periodic table lists the elements in order of increasing atomic number (the number of protons in the nucleus of an atom).
PLS MARK BRAINLIEST