Answer:
A
Explanation:
Sorry if wrong
Answer:
Liquid B: The solid appears unchanged.
Explanation:
A is a chemical change, because the solid dissolves away.
C is a chemical change, because the solid changes color.
D is a chemical change, because fizzing occurs.
B is the only solid that seems to remain the same.
Which of the following best describes
electromagnetic waves?
A. Electromagnetic waves require the presence of a
medium to be able to transfer energy.
B. Electromagnetic waves can transfer energy through
empty space.
C. Electromagnetic waves can only transfer energy though
water.
Answer:
B.
Electromagnetic waves do not require any type of media.
The correct statement is " Electromagnetic waves can transfer energy through".
What is electromagnetic wave?Electromagnetic waves are synchronized vibrations of electric along with magnetic fields that travel across a vacuum at the speed of light. The oscillations of the two fields generate a transverse wave since they are perpendicular to each other and to the direction of energy as well as wave propagation.
What is energy ?The capacity to work is defined as energy. It can take the form of potential energy, kinetic energy, thermal energy, electrical energy, chemical energy, nuclear energy, or any other form.
Therefore, the statement "Electromagnetic waves can transfer energy through" will best describe electromagnetic waves.
Hence, the correct answer will be option (b).
To know more about energy and electromagnetic waves.
https://brainly.com/question/3101711.
#SPJ2
Which statement best describes the relationship between igneous and metamorphic rocks?
Metamorphic rocks are formed from melting igneous rocks.
O Metamorphic rocks and igneous rocks do not follow a rock cycle
Igneous rocks must go through the sedimentary process to change into metamorphic rocks.
Igneous rocks are chemically changed into metamorphic rocks because of high temperature and pressur
Answer:
Igneous rocks must go through the sedimentary process to change into metamorphic rocks. Igneous rocks are chemically changed into metamorphic rocks because of high temperature and pressure. Metamorphic rocks are formed from melting igneous rocks. Metamorphic rocks and igneous rocks do not follow a rock cycle.
Explanation:
hope this helps!
Answer:
C
Explanation:
It's igneous rocks must go through the sedimentary process answer thing
In a DNA molecule, the adenine always pairs with the
Answer:
Adenine always pairs with thymine in a DNAmolecule.
Explanation:
Please help me A 0.200 M NaOH solution was used to titrate a 18.25 mL HE
solution. The endpoint was reached after 31.20 mL of titrant
were added. Find the molar concentration of the original HF
solution.
The molar concentration of the original HF solution : 0.342 M
Further explanationGiven
31.2 ml of 0.200 M NaOH
18.2 ml of HF
Required
The molar concentration of HF
Solution
titration formula
M₁V₁n₁=M₂V₂n₂
n=acid/base valence (amount of H⁺/OH⁻, for NaOH and HF n =1)
Input the value :
[tex]\tt 0.2\times 31.2=M_2\times 18.25\\\\M_2=0.342[/tex]
Question 8 (1 point)
Use coefficients to balance the following reaction:
H2CO3 + Fe → Fe2(CO3)3 + H2
Blank 1:
Blank 2:
Blank 3:
Blank 4:
Answer:
1) 3 2) 2 3) 1 4) 3
Explanation:
so on the reactant side (left), there is 2 H, 1 CO3, and 1 Fe. On the product side (right) there is 2 Fe, 3 CO3, and 2 H2. So to start I added a 3 in the first blank to make CO3 equal on both sides. In doing this, there is not 2 H, there is now 6 so I added a 3 in the 4th blank. Currently, H and CO3 are equal on both sides but not Fe. So I added a 2 in the 2nd blank. I didn't add anything in the 3rd blank so it is an understood 1.
The balanced equation
3H₂CO₃ + 2Fe → Fe₂(CO₃)₃ + 3H₂
Further explanationGiven
Reaction
H₂CO₃ + Fe → Fe₂(CO₃)₃ + H₂
Required
Coefficient of the reaction
Solution
Give a coefficient(the most complex = 1)aH₂CO₃ + bFe → Fe₂(CO₃)₃ + cH₂
Make an equationPrioritize balancing the elements that form the most complex compounds
Fe, left = b, right = 2⇒b=2
C, left = a, right = 3⇒a=3
H, left = 2a, right = 2c⇒2a=2c⇒2.3=2c⇒6=2c⇒c=3
The equation becomes :
3H₂CO₃ + 2Fe → Fe₂(CO₃)₃ + 3H₂
Define terms element compound
Answer:
Elements are the simplest complete chemical substances.
Each element corresponds to a single entry on the periodic table.
An element is a material that consists of a single type of atom.
A compound consists of two or more types of elements held together by covalent or ionic bonds
Which statement would be true if glucagon secretion were permanently inhibited, resulting in negative feedback?
Blood glucose levels would decrease.
Glycogen formation would be inhibited.
Insulin production would decrease.
The synthesis of fat would decrease.
Answer:
Insulin production would decrease.
Explanation:
Insulin and Glucagon work together to balance the sugar levels in the human blood stream. They work together in a negative feedback loop. Glucagon stimulates the liver to release glucose into the bloodstream in a process known as glycogenolysis. Insulin on the other hand is a sugar-lowering hormone.
Therefore, if glucagon secretion were permanently inhibited, insulin production would decrease as there would not be excess blood sugar to be reduced.
Answer:
Insulin production would decrease.
Wass, volume and density are all properties of
matter
3
weight.
formula
Answer:
:)
Explanation:
They are all properties of Matter. weight and formula wouldn't make sense.
BRAINLIEST!!! HELP PLZ
Answer:
strength of an ionic bond Is Answer
Explanation:
May be this helpful!
Answer:
strength of an ionic bond
Explanation:
Lattice energy is an estimate of the bond strength in ionic compounds. It is defined as the heat of formation for ions of opposite charge in the gas phase to combine into an ionic solid.
Specific gravity compares the density of a substance to the density of _____.
PLEASE HELP ILL GIVE YOU 15 POINTS !!!!!!
Answer:
Specific gravity compares the density of a substance to the density of air.
Specific gravity is compared the density of a substance to the density of water.
What is specific gravity?Specific Gravity is a dimensionless quantity that can be defined as the ratio of the density of a substance to the density of the water at a particular temperature.
The mathematical formula of the specific gravity can be written as:
Specific gravity = density of substance / density of water
The density of water at 4°C is used as a reference point as water has the highest density of 1000 kg/m³. Specific gravity or relative gravity does not have any dimension as it is a dimensionless quantity.
Specific gravity is the ratio of a substance’s density to that of water at a specific temperature. The temperature plays an important role in determining the specific gravity of a substance.
Therefore, specific gravity is a characteristic of the substance at a particular temperature and pressure that also affects the specific gravity.
Learn more about Specific gravity, here:
https://brainly.com/question/9100428
#SPJ2
Based on the contributions of early scientists, one can conclude that one discovery was
Answer:
the discovery of atomic structure.
Explanation:
Rutherford was a famous scientist who gave his theory of atomic structure.
Ernest Rutherford was a great physicist who is well known for his pioneering studies and discoveries about atoms and radioactivity. Rutherford was considered to be the greatest experimentalist after Michael Faraday.
Rutherford's atomic model was one of the greatest discoveries which provided many answers and solutions to the structure of atom and molecules that our earth is surrounded of.
Rutheford discovered that an atom has a tiny mass of positively charged particles in the centre of the atom called nucleus and negatively charged electrons surrounds the nucleus.
Bohr joined Rutherford in his studies and discovered many new facts about the structure of the atom based on the Rutherford's model. Today atomic model is the product of Rutherford atomic structure.
If you heat a liquid and measure the temperature at which it vaporizes (or boils) you are measuring...
A.) an atomic property
B.) a physical property
C.) a chemical property
Answer:
I believe that it is B
Explanation:
Calculate the molarity of 8.42 x 102 mL of solution containing 22.4 g of potassium iodide.
Answer:
Molarity = 0.154 M
Explanation:
Given data:
Volume of solution = 8.42 × 10² mL ( 8.42 × 10² /1000 = 0.842 L)
Mass of potassium iodide = 22.4 g
Molarity of solution = ?
Solution:
Number of moles of potassium iodide:
Number of moles = mass/molar mass
Number of moles = 22.4 g/ 166.0 g/mol
Number of moles = 0.13 mol
Molarity:
Molarity = number of moles / volume in L
Molarity = 0.13 mol / 0.842 L
Molarity = 0.154 M
Plz help me with is thank you
Questions aren't clear, if u need assistance let me know .. I'm in year11 I can help out.
When electricity passes through water (H20), the water breaks down to form
hydrogen gas (H2) and oxygen gas (02).
Which equation represents this chemical reaction?
A.2H20+ 02 – 2H2
B.2H2 + 02 – 2H20
C.2H20 + 2H2 – 02
D.2H20 - 2H2 + O2
Answer:
A. Because you have to simplify
Answer:
decomposition
Explanation:
i dont cap
Why do scientists need a universal system to classify organisms?
Answer:
classification enables scientists to explain the relationships between organisms, which is helpful in trying to reconstruct the evolutionary roots of a particular species. Finally, taxonomic names provide unique descriptive names for organisms. This is sometimes an issue with common names of animals.
Explanation:
Found in the Internet
One of the most popular club drugs. Originally patented as an appetite suppressant, this
syntetic árug produces fedings of happiness as well as balainations
Answer:
Ecstasy,LSD, Rohypnol
is this correct???PLZ HELP
William finds a piece of pure iron in his garden. After a few days, the iron begins to rust. What are the two types of substances involved in the rusting process of iron?
Iron is
an element
with one kind of atom that combines with oxygen from the air to form rust (iron oxide). Rust contains two types of atoms, which means it is
a compound
Answer:
It looks correct, yes.
Explanation:
Iron oxide are chemical compounds composed of iron and oxygen, which is known as rust.
What is the molar volume of a gas at standard temperature and pressure? 1.0L, 2.4L, 11.2L 22.4L
Question 2 (Multiple Choice Worth 2 points)
(01.03 LC)
2
A student is trying to calculate the density of a can. He already knows the mass, but he needs to determine the volume as well. Which of the following formulas can be used to calculate
the volume of the can?
3
O V =
3
1
OVE Tran
3
OV=53
Ov=mrah
Answer:
[tex]\pi[/tex] r² x h
Explanation:
A can is cylindrical in nature. Using the formula of the volume of the can, we can find this unknown volume.
The volume of cylinder is given as:
Volume of a cylinder = Area x height
Volume of a cylinder = [tex]\pi[/tex] r² x h
Therefore density of the can;
Density = [tex]\frac{mass}{volume}[/tex]
.
28:25
Time Remaining
Return
Submit
2
1 point
In the picture below, click on the correct Lewis Dot Symbol for Helium.
Account
2
1
Dashboard
1
Courses
2
i in
He
He
Calendar
3
Inbox
4
Istory
5
:He:
He: He
• •
Cudio
→ 6
10 Type here to search
0
Im sorry what ??
Your not being specific
Which describes a similarity between abiotic and biotic Which describes a similarity between abiotic and biotic factors?
A.They may include things that were once living.
B.They are both necessary for organisms to survive.
C.They are not usually important parts of the environment.
D.They can be easily replaced if they are used or destroyed.factors?
option A is correct.biotic is a nother word for living
Answer:
option A would be the correct answer for the question below.
Explanation:
Which describes a similarity between abiotic and biotic factors?
The measure of angle BAC can be cakulated using the
3,1
What is the measure of angle BAC? Round to the
nearest whole degree.
0°
С
1°
44
A
3.1 in
48°
4.5 in
B
[Not drawn to scale]
By the use of the trigonometric ratios, we have obtained the angle BAC as 44 degrees.
What is a right angled triangle?A right angled triangle is one in which one of the sides of the triangle is at an angle of 90 degrees. We are told to first find x knowing that;
x = sin^-1( 3.1/4.5) = 44 degrees
We can see that by the use of the trigonometric ratios, we have obtained the angle BAC as 44 degrees.
Learn more about right angled triangle: https://brainly.com/question/3770177
Please help me, Thank you!
Answer:
amount of charge
Explanation:
Oxygen and sulfur are both in Group 16, which means they have a -2 charge. They have two more electrons than protons, making the charge of the ion negative.
Hope that helps.
Please help fast
What statement is correct about wind turbines. A. They create Mechanical and electrical energy B. They transform wind energy to electrical energy C. Their total energy decreases when electricity is produced D. Their total energy increases when electricity is produced
Answer:
A.
Explanation:
sana makatulong follow mo ako please
Please help me, Thank you!
Answer:
5
Explanation:
The electrons in the outermost shell are the valence electrons. Since there are 5 electrons in the third energy level, there are 5 valence electrons.
Hope that helps.
03:58:40
If the kinetic and potential energy in a system are equal, then the potential energy increases. What happens as a result?
Total energy increases.
Stored energy decreases.
Energy of motion decreases.
Total energy decreases.
Answer:
If the kinetic and potential energy in a system are equal, then the potential energy increases. What happens as a result? Total energy increases.
Answer:
its C energy of motion decreases
Explanation:
i got it right on the edge 2021 unit test UvU
and if u dont trust me then get it rong with the other person （︶^︶）
Complete the statements about the law of conservation of momentum.
The law of conservation of momentum states that the total momentum of interacting objects does not ___. This means the total momentum ___a collision or explosion is equal to the total momentum _____ a collision or explosion.
Answer:
change
before
after
Explanation:
have a nice day :)
What is the molecular mass of a gas whose density is 1.25 grams per liter at STP?
STP = standard temperature and pressure
Use the formula:
d = MP/RT
where:
d = density = 1.25 g/L
M = molar mass (unknown)
P = pressure = 1 atm (standard pressure)
R = universal gas constant = 0.8206 L*atm/mol*K
T = temperature = 0C or 293.15 K (standard temperature)
1.25 g/L = M*(1 atm)/(0.08206 L*atm/mol*K)*(273.15 K)
M = 28.0 grams/mol
Giving brainliest please help with this question
Answer:
B! Hope this helps! :)
Explanation:
