Answer:
c. Mixtures can be separated by physical means, but compounds cannot.
Explanation:
Mixtures are comprised of two or more pure substances that have not combined to make a new substance. Because all pure substances have their own unique properties, mixtures can be separated by physical means.
Compounds are pure substances which means they have their own properties. Compounds are formed through a chemical means, and therefore must be separated through a chemical means.
Answer:
C
Explanation:
In compounds: Their individual constituent do not retain their properties hence cannot be separated by physical means
In mixtures: Their individual constituent retain their properties hence can be separated by physical means
If a compound is made up of more than one element why is it considered a pure substance? Choose 2 Group of answer choices The compound has different properties than the individual elements A compound can not be physically separated A compound can not be chemically separated A compound can be physically and chemically separated
Answer:
A compound can not be physically separated
Explanation:
A compound is a chemical substance that comprises of atoms of more than one element i.e. two or more elements are chemically combined to form a compound. However, as stated in this question, compounds are referred to as pure substances.
This reason is attributed to the fact that a compound cannot be physically separated i.e. the constituents of a compound cannot be separated using physical changes or methods. This is because the atoms of the constituent elements are combined or joined together by chemical bonds.
Answer:
Even though a compound can be made of two or more types of atoms, it is still a pure substance because the compound can be isolated, like salt or water.
Explanation:
zinc metal reacts with hydrochloric acid to produce hydrogen gas.
what best describes this reaction?
a. A single replacement reaction takes place because zinc is more reactive and hydrogen
b. A single replacement reaction takes place because zinc is more reactive than chlorine
c. A double replacement reaction takes place because zinc is less reactive than hydrogen
d. A double replacement reaction takes place because zinc is less reactive than chlorine
a. A single replacement reaction takes place because zinc is more reactive and hydrogen
Further explanationIn voltaic series
Li-K-Ba-Ca-Na-Mg-Al-Mn- (H2O) -Zn-Cr-Fe-Cd-Co-Ni-Sn-Pb- (H) -Cu-Hg-Ag-Pt-Au
The more to the left, the metal is more reactive (easily release electrons) and the stronger reducing agent
The more to the right, the metal is less reactive (harder to release electrons) and the stronger oxidizing agent
So that the element located on the left can push the element on the right in the redox reaction
Reaction
Zn+2HCl ⇒ ZnCl₂ + H₂
If we look at this reaction, the elements that play a role are those that undergo a redox reaction
Oxidation : Zn⇒Zn²⁺ + 2e
Reduction : 2H⁺ + 2e ⇒H₂
So Zn (located on the left) can push H (the element on the right) in the redox reaction ⇒ Zn more reactive
A single replacement reaction is a chemical reaction in which one element replaces the other elements of a compound to produce new elements and compounds
A+BC⇒AC+B
So the above reaction involves the elements Zn and H which undergo a redox reaction and are included in a single replacement
Answer:
A
Explanation:
What does the statement there is only about 13.7 billion ⭐️ in space
This illustration is an example of a
The illustration is an example of surface waves.
Each water molecule can form hydrogen bonds with up to _____ neighbors
Group of answer choices
6
8
2
4
Answer:
2
Explanation:
thats the answer.have good day
A. none of the above
B. 12000 m/s
C. 0.53 m/s
D. 1.875 m/s
A. none of the above
The answer would be 180 m/s
Hope this helps! Brainliest if you can!
If a substance has a density GREATER
than the liquid it's in, then it will
Answer:
sink
Explanation:
a substance with a higher density than others will sink and vice versa
Why was periodic table developed
Answer:
The periodic table was created to organize the elements and provide physical and chemical properties, also to group with elements like it.
Hope this helps
which element, Magnesium or Barium, will react more violently with water, and
WHY?
Answer:
magnesium
Explanation:
A piece of gold has a mass of 21.7 kg and a volume of 5.78 cm3 . What is the density of gold? (Convert kgg)
Answer:
The answer is 3754.33 g/cm³Explanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\ [/tex]
From the question
mass = 21.7 kg = 21700 g
volume = 5.78 cm³
We have
[tex]density = \frac{21700}{5.78} \\ = 3754.3252...[/tex]
We have the final answer as
3754.33 g/cm³Hope this helps you
A skittish squirrel is climbing vertically on a tree. Its
motion is shown on the following graph of vertical
position y vs. time t.
6
5+
3
2+
1
→t(s)
2
3
4
5
6
7
8
9
What is the instantaneous speed of the squirrel at time
t=2 s?
Answer: 1
Explanation:
Answer:
-0.1
Explanation:
Plz help! I’m on a timer!
Answer: c. ceabd
Explanation: Substances that are more dense move to the bottom of the beaker. Substances that are less dense float to the top.
What components of an atom has no charge
Answer:
Neutrons
Explanation:
Protons have a positive (+) charge.
Electrons have a negative (-) charge.
Neutrons have a neutral (0) charge.
Answer: neutrons
The components of an atom that have no charge are neutrons. Neutrons have a neutral charge, which means it has no charge. It is not positive or negative. The answer is neutrons.
if elements were combined by shaking would they have new properties
Answer: Yes because that's when they form a compound
Mangrove trees are affected by several factors. Which is an abiotic factor contributing to the energy cycle of a mangrove ecosystem?
Answer:
Just think of whats in a forest ecosystem
for example
Water
sunlight
tempreture
The abiotic factor that has been capable of contributing to the energy cycle of the mangroves has been climate.
Mangrove trees are the shrubs that have been found in the coastal regions. The trees have been capable of tolerating the harsh climatic conditions such as salty water, the flow of tides, etc.
The abiotic are the nonliving factors that has been capable of changing get resulting in the formulation of the ecosystem.
The mangroves have been capable to thrive in hard conditions. The abiotic factor that has been capable to affect the growth of the mangroves has been climate.
For more information about Mangrove trees, refer to the link:
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What happens to a solute?
A. It gets dissolved in something else.
B. It settles out of the solution.
C. It forms a solid in the solution.
O D. Something gets dissolved in it.
A solute gets dissolved in something else. (solvent)
What is a solute?A solute is a substance which dissolves in something else, like a solution. As a result, a homogeneous mixture is formed. A solute can be a gas, solid or a liquid.
What is a solvent?A solvent is a substance in which a solute happens to dissolve in order to produce a homogenous mixture. Solvents can also exist as solids, liquids as well as gases.
For example, NaCl is a solute which dissolves in water, which is a solvent. The equation is as follows
NaCl (aq) + H2O (l) → NaOH (aq) + HCl (aq)
Hence, option A is the correct option.
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I NEED HELP!!! How is continental crust different from oceanic crust?
Oceanic crust is thinner and more likely to sink.
Oceanic crust is thicker and more dense.
Continental crust is more dense and lighter.
Continental crust is thicker and more likely to sink.
Answer:
A
Explanation:
Oceanic crust is thinner and more likely to sink
Answer:
The answer is A Oceanic crust is thinner and more likely to sink.
Explanation:
I hope this is right sorry if it's not.
Which will most likely happen to her soup?
Carlotta adds too much salt to her soup. She recalls that
evaporation can be used to separate salt from salt water,
so she plans to leave the soup on the stove on low heat
until the soup is less salty.
O The soup will become saltier because evaporation
removes the water and leaves the salt behind.
O The procedure will make the soup less salty because
the salt will evaporate and leave the pot.
The saltiness of the soup will not change because
both salt and water will evaporate.
O The heat will cause the soup to become more salty
because more salt dissolves in hotter water.
Answer: A! The soup will become saltier because evaporation removes the water and leaves the salt behind.
Explanation:
Just finished the test and got a 90%! <3
Answer:
A
Explanation:
Which of the following would most likely have grains cemented together?
a. marble
C. limestone
b. schist
d. diorite
Please select the best answer from the choices provided
c
A
B
С
D
Answer:
limestone
Explanation:
box a and box b have the same density. box a had more volume. which box has more mass?
Answer:
Box A.
Explanation:
Density can be defined as mass all over the volume of an object.
Simply stated, density is mass per unit volume of an object.
Mathematically, density is given by the equation;
[tex]Density = \frac{mass}{volume}[/tex]
In this scenario, Box A and Box B have the same density. However, Box A had more volume. Therefore, the box that would have more mass would be Box A because it has more capacity or volume to hold more matter.
This ultimately implies that, the volume of a box is directly proportional to its mass (amount of matter it can hold); the higher the volume of the box, the higher its mass (more mass).
Let's assume Box A has a volume of 25cm³ and a mass of 50kg.It's density would be;
[tex]Density = \frac{50}{25}[/tex]
Density = 2kg/cm³
Assuming Box B has a volume of 10cm³ and a mass of 20kg.It's density would be;
[tex]Density = \frac{20}{10}[/tex]
Density = 2kg/cm³
Therefore, it can be deduced that even though Box A and Box B have the same density; Box A had more volume and consequently, more mass.
Absorption: Occurs when light waves transfer energy to particles of What?
Answer: when light hits the surface of an object the energy is transferred into the particles in the surface of the object thats why when u leave somthing by a window or outside in the sun it warms up and when it hits object that isnt clear enough to reflect or disperce the object obsorbes the white light and some of the colors of the white light thats why you see a rainbow like color when you put the object in the light.
Explanation:
Please help me, I am struggling please help
What did Edwin Hubble discover about the universe?
O Distant stars are all moving away from us.
O The farthest stars are blueshifted.
O The stars in our galaxy are all moving away from us.
The universe is an unchanging place.
MAJOR AMOUNT OF POINTS
What is the chemical formula of wood?
Answer:
C₆H₁₀O₅
Explanation:
In chemistry, we denote any molecule with carbons, hydrogens, and other elements combined together as organic compounds. This is where get get "Organic Chemistry" from.
Wood is going to be an organic compound.
Answer:
C₆H₁₀O₅
Explanation:
As fuel is burned in an airplane, it seems to disappear from the tank, suggesting that matter is destroyed during the reaction. Identify the scientific law that is of importance here. Explain why this is not true, and describe where the matter goes.
Answer:
Well we know that matter is neither created nor destroyed by chemical reactions or physical transformations. It is not destroyed it simply was converted to gas. =D
The scientific law that is of importance here is the 'Law of conservation of mass'.
The law of conservation of mass states that ' mass can neither be created nor be destroyed.In other words, a mass of an element before and after the chemical reaction remains the same.The airplane uses energy generated in the reaction of burning fuel to run the engine for movement.A fuel burned in an airplane had undergone a chemical reaction that converted fuel into a gaseous product.These gaseous products are then eliminated through exhaust from the airplane leaving the tank empty.No mass is destroyed during this process only conversion of mass took place.So, from this, we can conclude that the scientific law that is of importance here is the 'Law of conservation of mass'.
Learn more about the 'law of conservation of mass':
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How do geologists know that there once was a vast sea where the Grand Canyon is today?
The geologists know the presence of the vast sea at Grand Canyon by the erosion and indentations.
Grand Canyon in Arizona has been the rock sediment. It has been determined to be the vast sea due to the presence of oceanic floors. The erosion of the rocks results in the formation of the land over a vast period of time.
The rock indentation results in the formation of the mountains. The rock has been indented with the force thus, there has been the oceanic force that results in the indentations.
Thus, the erosion and indentations have resulted in the formation of the Grand Canyon by a vast sea.
For more information about the geological study, refer to the link:
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name one state of matter
Answer:
solid
Explanation:
Answer:
Gas
Explanation:
How many total atoms of element X are represented below?
According to the kinetic-molecular theory, what happens to a liquid when it is transferred from one container to another? The volume and the shape stay the same. The volume increases to fill the new container, but the shape stays the same. The volume stays the same, but the shape changes to fit the new container. The volume and the shape change to fill the new container.
Answer:
C, "The volume stays the same, but the shape changes to fit the new container."
Explanation:
i took the test & got this question correct.
Answer:
It's C
Explanation:
For Edge:)
8Li
8 Be
0e
What type of radioactive decay is this?
Answer:
emitted i think
Explanation:
To determine the type of radiation (alpha, beta or gamma), first determine the background count rate, then the source count rate with no absorber. Next, place a sheet of paper between the source and the monitor. If the counts are significantly reduced, the source emits alpha particles.
Answer:
Plasma Levels of IL-8 and TGF-β1 Predict Radiation-Induced Lung Toxicity in Non-Small Cell Lung Cancer: A Validation Study
Explanation: got it from sources