Answer:
Water+Heat
proof of physical reaction
Explanation:
Chemical reactions are reactions that can't be undone ex cooking and egg.
Physical reactions are reactions that can be undone ex boiling water.
Answer:
Egg + Heat = Chemical Change
Explanation:
This is a chemical change because it cannot be undone. Once it changed its form you could not revert it back to its original self.
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A student determines the density of an element to be 2.73 g/cm 3 . If the accepted value is 2.70 grams per cm 3 , what is the student's percent error? Identify the element. What is the boiling of this element in Celsius degree
Answer:
Explanation:
percentage error = error x 100 / correct value
= (2.73 - 2.70) x100 / 2.70
= 1.11 %
The element is Aluminium whose density is 2.702 grams / cc
Boiling point of Aluminium = 2519⁰C .
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Answer:
A
Explanation:
Which statement offers an explanation for why some parts of John Dalton's atomic theory were proven to be false?
Scientists today are more diverse and have more educational training
Mistakes were made in key calculations during experimenting
Extensive repeated testing was not completed to verify the results
Technology available at that time was limited.
Answer:d
Explanation:
Answer:
The answer is D
Explanation:
I took the test!
What is the relationship between the atomic mass of an element and a mole of that element's atoms?
Answer:
Each ion, or atom, has a particular mass; similarly, each mole of a given pure substance also has a definite mass. The mass of one mole of atoms of a pure element in grams is equivalent to the atomic mass of that element in atomic mass units (amu) or in grams per mole (g/mol).
Explanation:
The relationship between the given terms is provided below throughout the below segment.
One mole of such a component's atomic weights is approximately equivalent to that component's atomic mass. This same atomic mass of the oxygen element, for example, is about 16g. As a result, one mole containing oxygen atoms equals 16g of oxygen ([tex]O_2[/tex]). 1 mole containing oxygen atoms weighs 16g.We can say that,
→ [tex]1 \ mole \ in \ gram \ of \ an \ element = Atomic \ mass \ of \ an \ element[/tex]
Learn more about atomic mass here:
https://brainly.com/question/18333006
Are the oldest rocks in the canyon found near the bottom
Answer: yes they are
Explanation:
because its so hot and the heat just stays at the bottom
Which of the following is the end product of a natural
radioactive series?
Answer:
Lead
Explanation:
Lead (Pb) is the end product of every natural radioactive series.
psoriasis is a disease that causes a red rash on the skin. which body system does psoriasis affect?
a. respiratory
b. integumentary
c. immune
d. digestive
e. circulatory
Answer:
The answer to this question is integumentary.
Explanation:
The answer is that because that is your skin area and so if you have a rash then if will affect that part.
It's b. integumentary
I got the test right
Which symbol and unit of measurement are used for resistance?
symbol: R: unit :
symbol: 0; unit: R
symbol: R: unit o
symbol: R: unit R
Answer:
Unit of resistance is Ω (Omega).
Explanation:
The ability to measure the oppose the flow of electric current is called resistance of a circuit. Its relation with voltage and current is given by Ohm's law as follows :
V = IR
R is resistance
Its unit is Omega and it is represented by Ω.
The unit of the electrical resistance is ohm Ω
The symbol of resistance is R.
Hence Option A) Symbol: R, Unit : Ω is the correct answer
What is resistance?Resistance is simply the measure of the opposition to current flow in an electrical circuit.
Ohm’s law states that the potential difference between two points is directly proportional to the current flowing through the resistance.
V = I × R
Where;
V is the voltage or potential difference. I is the current.R is the resistance.The unit of the electrical resistance is ohm Ω
The symbol of resistance is R.
Hence Option A) Symbol: R, Unit : Ω is the correct answer
Learn more about Ohm’s law here: brainly.com/question/2364325
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What is a hypothesis?
O proof and evidence of a scientific fact
O a question about nature and how it works
a series of steps to carry out an experiment
O a possible explanation of or answer to a scientific question
Answer:
The 4th option
a possible explanation of or answer to a scientific question
Explanation:
Answer:
A hypothesis is a question about naturre and how it works
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Answer:what do you nned help with
Explanation:
put 34,100,000 in scientific notation
Answer:
3.41 x 10^7
Explanation:
Describe how the particle motion is different from state to state.
Answer:
The particles in a gas are moving very quickly in random directions.
The particles in a solid are tightly packed and locked in place, and they are vibrating in their place.
The particles in a liquid are close together (touching) but they are able to move/slide/flow past each other.
brainliet please?
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Which cell organelle controls the activities for the cell?
Answer:
[tex]the \: nucleus \:[/tex]
Explanation:
[tex]the \: nucleus \: is \: organelle \: that \: controls \\ \:a ll \: cellular \: activities.[/tex]
a person who has non-functional cone type won't be able to identify the_____________of
fill in the blank.
A.color
B. shape
C. size
Answer:
A
Explanation:
more domunit
I need help with these two questions
halogens have 7
allali have 2
noble gases have 8
K = 1
P = -3
Ra= 7
Cl = -1
N = 5
O = 6
if an object has a mass of 30 grams and a volume of 6 cubic cm. what is its density
Answer:
5
Explanation:
mass/volume = density
30/5 = 5
What volume of silver metal will weigh exactly 2500g. The density of silver is 10,5 g/cubic centimeters.
Answer:
26250 cubic centimeters
Explanation:
What is the frequency of an event?
Group of answer choices
Probability
Degree
Expected occurrence
Identification
Answer:
Probability
Explanation:
Which can change from one state of matter to another at the temperatures and pressures experienced at Earth’s surface?
oxygen
carbon dioxide
water
nitrogen
3. compounds in which elements are held together by covalent bonds...keeps their own properties
A polar molecule
B. element
C. compound
D. molecule
Please answer correctly !!!!!!!! Will mark brainliest !!!!!!!!!!!!!!
Answer: uuhhhh pass
Explanation:
Answer:
It should be 0.8mL.
Explanation: Because you would subtract what the rock would be without the water.
[tex]5.6-4.8=0.8[/tex] Simple C:
How many particles in 32.0 liters of helium
Number of particles : 8.603 x 10²³
Further explanationStandard conditions for temperature and pressure are used as a reference in certain calculations or conditions
Assumption⇒ Standard Conditions
Conditions at T 0 ° C and P 1 atm are stated by STP (Standard Temperature and Pressure). At STP, Vm is 22.4 liters/mol.
1 mol = 6.02 x 10²³ particles (atoms, ions, or molecules)
32.0 liters of Helium
[tex]\tt mol=32:22.4=1.429[/tex]
Number of particles :
[tex]\tt 1.429\times 6.02\times 10^{23}\\\\=8.603\times 10^{23}[/tex]
If a football is 625 mL volume and 0.64 g/mL density what is the mass
What happens if an organism cannot carry out its life function?
Answer:
organisms cannot stay with out getting nutrients as they will not be able to repair them selves or produce energy.
Explanation:
how long will take an object traveling at 25 m/s to reach a distance of 125 meters?
Answer:
5s
Explanation:
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Answer:
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You are a high school track & field coach and you have a young female athlete who is running a competitive mile pace (5:20). This would make her competitive at the state and national level. You want to help this athlete to maintain and even increase her competitive potential. What would you do?
Answer:
By ensuring she is giving speed endurance training
Explanation:
Speed endurance training would be the most ideal in helping an athlete to maintain and even increase her competitive potential.
The speed endurance training would help the athlete maintain and attain a high speed for a longer duration of time.
This would make the athlete get used to running an improved time for much longer distances.
Which of the following is the abbreviation for the element Gold?
Answer:
Au
Explanation:
trust me, the abbrevation for gold is Au. chemicaly, Medicaly, and in dentistry
mortal kombat 11 or the new cyber punk which do u think is better
Answer:
personally I like the mortal kombat 11 better
Answer:
mortal combat 11.
how many atoms is in a molecule of omega 3 fatty acid
Answer:
There are 18 carbon atoms in a molecule of omega 3 fatty acid
Explanation: