Answer:
True.
Explanation:
How do you know if a material is an elernent or a compound?
Explanation:
Elements and compounds are both examples of pure substances. A substance that cannot be broken down into chemically simpler components is an element. ... A substance that can be broken down into chemically simpler components (because it has more than oneelement) is a compound.
An alpha particle is identical to a:
helium nucleus
hydrogen nucleus
high energy electron
radium nucleus
Answer: helium nucleus
Which statement describes sunspots? A.Sunspots have a bright white appearance. B.Sunspots occur in the radiative zone of the sun. C.Sunspots occur in areas of extremely low magnetic fields. D.Sunspots have lower temperatures than their surroundings.
Answer:
The statements that describe sunspots is;
D. Sunspots have lower temperatures than their surroundings
Explanation:
Sunspots is a phenomenon that involves temporary appearance of dark areas on the Sun's surface, which are regions of concentrated magnetic field flux which inhibit heat transfer by convection and are therefore cooler than other parts of the Sun. Due to the presence of magnetic field magnetic
Sunspots are temporary phenomena on the Sun's photosphere that appear as spots darker than the surrounding areas. They are regions of reduced surface temperature caused by concentrations of magnetic field flux that inhibit convection. Opposite magnetic polarity sunspots usually appear as a pair.
Therefore, the statement that best describe sunspots is that a sunspot is a region of reduced temperature compared to surrounding areas on the Sun's surface.
Lab: Limiting Reactant and Percent Yield
Student Guide
Pre-Lab Information
Purpose Explore the yield of a chemical reaction by identifying the limiting reactant, comparing the
theoretical and actual yields, and explaining the sources of error.
Time Approximately 45 minutes
Question While observing a chemical reaction, how can you tell which reactant is limiting?
Reaction The reaction of copper(II) chloride and aluminum is shown in this balanced equation:
3CuCl2 + 2Al 2AlCl3 + 3Cu
Hypothesis If a substance is the limiting reactant, then it will be fully consumed by the time the
reaction completes because it is the reactant that reacts completely and the reaction
cannot proceed further.
Summary You will react copper(II) chloride with different quantities of aluminum in two trials. You
will also calculate percent yield for Trial 2.
Answer:
pre lab information would be the thing you to ressearch the lab to get the information
Limiting Reactant and Percent Yield Lab Report attached
Are the following equations balanced or unbalanced?
1. SnO2 + 2H2 → Sn + 2 H2O
2. 4NH3 + 5O2 → 4NO + 6H2O
3. 2B2Br6 + 5HNO3 2 B(NO3)3 + HBr
4. 2KNO3 + 1H2CO3 → 1K2CO3 + 2HNO3
An organism whose cell contains a nucleus.
Answer:
Eukaryotes
Explanation:
Sn(IV) and Br
chemical formula
Si Hecho Dos Cubos de Hielo En Un Vaso Con Agua Señalo Donde Quedo El Nivel Del Agua, Luego A Pasar El Tiempo Dejo Que Se Derritan Los Cubos De Hielo El Nivel Del Agua Aumenta??
Answer:
Ver explicacion
Explanation:
Técnicamente, cuando el hielo se derrite, ocupa aproximadamente el mismo volumen de agua que es igual a la masa de agua desplazada antes de que el hielo se derrita. Esto es posible solo cuando se ignora el cambio en la densidad del agua.
Sin embargo, si tenemos en cuenta el ligero cambio en la densidad del agua, se puede demostrar que el volumen de hielo es mayor que el del agua líquida porque el agua se expande cuando se congela.
Esto significa que el volumen de agua disminuye cuando el hielo se derrite.
Please help!
Explain how the Gray Wolf is a keystone species in the Yellowstone
National Park ecosystem.
Wolves are a censerious(critical) keystone species in a healthy ecosystem. By regulating prey populations, wolves authorize(enable) many other species of plants and animals to flourish. Without predators, such as wolves, the system fails to support a natural level of biodiversity.
Help asp please thanks
The maps show that northern areas should get
Answer:
We might need more information too answer that question...
Explanation:
Try Inserting A picture ️ :)
As altitude increases, what happens to air pressure the choices are it fluctuates, it increases, it decreases or it stays the same
Answer:
it decreases
Explanation:
It is a common saying the pressure decreases with height. This means that as altitude increases, the pressure of air decreases. The higher you go above sea level, the pressure becomes lesser.
This is as a result of decrease in the amount of air above sea level and hence a decrease in the density of air as altitude increases.
Hence, with increasing altitude, pressure decreases.
Answer:
It decreases
Explanation:
as pstnonsonjoku says in their answer.
I cannot give you anything more than I just did a question on this an it was correct because i'm in a timed test and just happend to see this!
Have a great nightish day!
NO FILES OR LINKS PLEASE HELPPPP IVE ASKED THIS 3 TIMES AND ALL I GET IS SCAM FILES ILL GIVE YOU BRAINLIEST PLEASE
What is the skeleton equation for
CuSO4 + 2NaOH → Cu(OH)2 + Na2SO Copper sulfate + Sodium hydroxide --> copper hydroxide + sodium sulfate
Answer:
*Inserting real answer*
Explanation:
I think CuSO4 + 2NaOH → Cu(OH)2 + Na2SO4 is the skeleton equation.
If I am wrong I am so sorry!!!
Have a nice day! :)
Also sorry for all the fake answers you have been getting that happened to me too TnT
Which energy transformation occurs when a match is lit?
A
Chemical energy to heat energy
B
Heat energy to potential energy
C
Electrical energy to heat energy
D
Kinetic energy to potential energy
Answer:
A
Explanation:
the chemical energy in the phosphorous in the match turns into heat energy once the match is struck and starts to combust.
Calculate the ratio of the velocity of molecular oxygen to the velocity of atomic argon at the same temperature.
I asked this before but still need help
No links, I'm not d*mb
Answer:
Oxygen 1.12 X faster
Explanation:
NEED HELP ASAP PLSSS
Please read the below paragraphs and then answer the 2 questions in complete sentences.
Natural selection was proposed by Charles Darwin to explain how new species evolve. All types of living things have small differences between the individuals in the species. If one of those differences allows the individual to live longer, they will likely have more offspring. As that trait is passed on, the population starts to look more like the successful individual. Over time, the species changes.
In 1896, J. W. Tutt suggested that the peppered moths were an example of natural selection. He recognized that the camouflage of the light moth no longer worked in the dark forest. Dark moths live longer in a dark forest, so they had more time to breed.
1. What is natural selection?
2. How are peppered moths an example of natural selection?
FOLLOW THE INSTRUCTIONS PLZZZ
1.Natural selection is the differential survival and reproduction of individuals due to differences in phenotype. It is a key mechanism of evolution, the change in the heritable traits characteristic of a population over generations.
2.Because predators were able to spot the light moths more easily, the dark moths were more likely to survive and reproduce. ... The peppered moth case is an example of natural selection. In this case, changes in the environment caused changes in the characteristics that were most beneficial for survival
Which best describes the products of a
chemical equation?
A. Chemicals before the reaction starts
B. Chemicals after the reaction ends
C. Chemicals on the left of the arrow
D. Chemicals on the right of the arrow
Answer:
b?
Explanation:
Chemicals after the reaction ends during chemical equation. Therefore, the correct option is option B among all the given options.
What is chemical equation?In chemistry, you will frequently come across a chemical equation. It is a textual depiction of the procedure that takes place throughout a chemical reaction using numbers and symbols.
The reactants are placed on the left side of such an arrow in a chemical equation, while the reaction's products are placed on the right. Though certain equations may imply equilibrium with the reaction occurring in both directions simultaneously, the tip of the arrow normally heads toward the right or product side of the equation. Chemicals after the reaction ends during chemical equation.
Therefore, the correct option is option B.
To learn more about chemical equation, here:
https://brainly.com/question/19626681
#SPJ6
Balance the following chemical equation:
C2H60+02 → CO2 + H20
Answer:
Explain: In order to balance the chemical equation, you need to make sure the number of atoms of each element on the reactant side is equal to the number of atoms of each element on the product side. In order make both sides equal, you will need to multiply the number of atoms in each element until both sides are equal.
Convert 3.00 * 10 ^ 26 molecules of carbon dioxide gas at STP to L.
1.What is the coefficient of the scientific notation answer? 2.What is the exponent of the scientific notation answer? 3.How many significant figures are there in the answer ?
4.What is the right most significant figure in the answer?
Answer: 1. The coefficient is 1.12
2. The exponent is 4
3. There are 3 significant digits
4. The rightmost significant figure is 2.
Explanation:
Scientific notation is defined as the representation of expressing the numbers that are too big or too small and are represented in the decimal form with one digit before the decimal point times 10 raise to the power.
For example : 5000 is written as [tex]5.0\times 10^3[/tex]
According to avogadro's law, 1 mole of every gas contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles and occupy 22.4 L at STP.
[tex]6.023\times 10^{23}[/tex] molecules of [tex]CO_2[/tex] occupy = 22.4 L at STP.
Thus [tex]3.00\times 10^{26}[/tex] molecules of [tex]CO_2[/tex] occupy = [tex]\frac{22.4}{6.023\times 10^{23}}\times 3.00\times 10^{26}=11.2\times 10^3 L[/tex] at STP.
Scientific notation = [tex]1.12\times 10^4L[/tex]
The coefficient is 1.12
The exponent is 4
There are 3 significant digits
The rightmost significant figure is 2.
Biologist group living things based on ____. Habitat Habitat Size Size Colors Colors Shared Characteristics
Answer: i think it is Habitat but i am not 100%
Explanation:
what are the five major types of celestial bodies in the solar system
Answer:
the Sun, planets, satellites, comets, asteroids and meteoroids.
Explanation:
hope it helps :)
Which phrase best describes an individual organ
Answer:
the answer is B
Explanation:
Help pleaseee :( .....
Answer:
A
Explanation:
Why would you rather have hot cocoa than lemonade on a cold day? (The lesson is called heat transfer)
Answer:
you would more than likely have hot coca.
Explanation:
Because when its cold out you don't want something cold, its common sense lol.
State two methods to increase the rate of the chemical reaction and explain
for each, in terms of particle behavior, how each method would increase
reaction rate.
METHOD 1:
Explanation:
METHOD 2:
Explanation:
Answer:
METHOD 1: (surface area of a solid reactant) METHOD 2: (concentration or pressure of a reactant)
Explanation:
METHOD 1: (surface area of a solid reactant) Increasing the surface area of a solid reactant exposes more of its particles to attack. This results in an increased chance of collisions between reactant particles, so there are more collisions in any given time and the rate of reaction increases.
METHOD 2: (concentration or pressure of a reactant) Increasing the concentration means that we have more particles in the same volume of solution. This increases the chance of collisions between reactant particles, resulting in more collisions in any given time and a faster reaction. As we increase the pressure of reacting gases, we increase the rate of reaction.
An object has balanced forces acting on it. Which of the following describes the result these balanced forces have on the object? A. It remains at rest or speeds up in the same direction. B. It speeds up in the same direction or moves at constant speed. C. It speeds up in the same direction or slows down. D. It remains at rest or moves at constant speed in the same direction.
Answer:
C.It remains at rest or moves at constant speed in the same direction.
Explanation:
First, remember the Newton's 1st law of motion which states that the object at rest will remain at rest and that in motion will stay in motion with the same speed and same direction unless acted by unbalance forces.
Balanced forces on an object occur when two forces at act on an object are equal in size and act in opposite direction. In this case, a stationary object will stay at rest while an object moving will continue to move at the same speed and same direction.
An object acted by balanced forces is said to be at equilibrium, thus the state of motion will be maintained.The object will not accelerate. A good example of an object acted by balanced forces is an object at rest or in constant motion such as a car that stopped at red-light signal or a car travelling at a constant speed.
I’ll give the brainliest
What will happen to buildings, statues and canyons where water flows through them over many years?
Answer:
Water gradually degrades them until the metal parts rust and the other materials deteriorate.
Explanation:
How are the testes and the ovaries similar?
They are part of the human skeleton.
They are reproductive organs.
They are sensory organs.
They produce sperm.
I need help with my science project someone help me answer it!
Answer:
food
Explanation:
6
0/1 point
If you have 1.0 mole of each of the following compounds, which will have the most molecules?
Х
NI3 (nitrogen triiodide)
KCI (potassium chloride)
Lici (lithium chloride)
O C2H2 (ethyne)
O They all have the same number of molecules.
7
1/1 point
fn 35 moles of Iron (Fe)?
Answer:
6. They all have the same number of molecules.
7. 19.5 g
Explanation:
6. From Avogadro's hypothesis, we understood that 1 mole of any substance contains 6.02×10²³ molecules i.e
1 mole = 6.02×10²³ molecules
Considering the question given above, each compounds has just 1 mole. Thus, they will also have the same number of molecules.
7. Determination of the mass of iron (Fe)
Number of mole of Fe = 0.35 mole
Molar mass of Fe = 55.85 g/mol
Mass of Fe =?
Mass = mole × molar mass
Mass of Fe = 0.35 × 55.85
Mass of Fe = 19.5 g
Thus, the mass of 0.35 mole of iron (Fe) is 19.5 g