Element and compound both are considered as pure substances.
Thus, both option 1 and 2 are correct.
What is a pure substance?Pure substances are defined as materials with a consistent chemical composition that cannot be physically separated through the use of techniques like filtration, evaporation, etc.
Anything that is made up of the same atom or molecule throughout is a pure substance. Everything else is a mixture.
Since elements are not physically or chemically broken down to generate simple, tiny entities like zinc, elements and compounds are pure substances. Furthermore, pure substances like water are combined to create compounds.
Both homogeneous and heterogeneous mixtures are not pure substances since they lack predetermined ratios and proportions, making it difficult to identify their exact composition.
Pure substances include sodium, water, a copper wire, an aluminum foil, etc.
Thus, elements and compounds both are categorised as pure substances.
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. The stomach, small intestine, and large intestine are all organs. When they work together to process food, they form a functional unit known as -
20 points
an organism
a system
a tissue
a cell
The functional unit is called a system.
The stomach, small intestine, and large intestine are all organs. When they work together to process food, they form a functional unit known as a system. The correct option is b.
What is a body system?The living body performs many functions. These functions are performed by different systems of the body. There are many systems in the body.
These systems are digestive systems, reproductive systems, circulatory systems, etc. These systems run the body and make an organism.
Here, the stomach, small intestine, and large intestine are all organs of the digestive system. Digestive system digest the food that we eat and provides us energy and removes the waste material from the excretory system, which excretes it out of the body.
Thus, the correct option is b. system.
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What is commensalism? Give two examples.
Answer:
Commensalism is a relationship between two organisms in which one organism benefits, and the other one is left unaffected.
Examples:
1. Barnacles on a sea turtle
2. Tree frogs and plants (they use them as protection)
1. Barnacles on a sea turtle
2. Tree frogs and plants (they use them as protection)
hope this helps
Is an apple seed a compound?
Answer:
no, but they contain a compound plant called amygdalin, so technocly yes
Explanation:
I need Helpppp pleaseee
Answer:
9) 126.86 amu
Explanation:
Please see the attached picture for full solution.
*I can't see the fractional abundance for Q8. Thus, I am unable to help you with that.
To find the avg atomic mass, multiply the fractional abundance to each of the masses and add them all up.
You are on an alien planet where the names for substances and the units of measures are very unfamiliar. Nonetheless, you obtain 40 quibs of a substance called skvarnick. You can trade this skvarnick for gold coins, but the vendors all measure skvarnick in units of sleps; not quibs. 15 quibs is equal to 13 sleps. If you have 40 quibs of skvarnick, how many sleps do you have? Round your answer to the nearest tenth (one decimal place). Type only the number; not the number and unit. Your Answer:
Which actions are part of a system of methodical tests and refinements specific to technological design? 1 documenting, tinkering, testing 2 tinkering, presenting, testing 3 testing, documenting, pr esenting 4 presenting, tinkering, testing
Answer:
1. documenting, tinkering, testing
Explanation:
Technological design is defined as the process of study, design and development of new technologies.
There are some action in the methodical tests and refinements specific to technological design include documenting, tinkering, testing.
Documenting includes collecting all the information about the design and develop the product, tinkering involves repairing or adjust the issues found in the development, and testing helps to evaluate if the product is ready to work as it is supposed to.
Hence, the correct answer is "1."
A piece if stone has a mass of 24.595 grams and a volume of 5.34 cm ^3. What is the density of the stone
Answer:
The answer is
4.61 g/cm³Explanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\ [/tex]
From the question
mass of stone = 24.595 g
volume = 5.34 cm³
The density of the stone is
[tex]density = \frac{24.595}{5.34} \\ = 4.605805243...[/tex]
We have the final answer as
4.61 g/cm³Hope this helps you
PLS SOMEONE HELP ME:) this is science class
Answer: v
Explanation: To establish the age of a rock or a fossil, researchers use some type of clock to determine the date it was formed. Geologists commonly use radiometric dating methods, based on the natural radioactive decay of certain elements such as potassium and carbon, as reliable clocks to date ancient events.~ Google
Hope it helped :D
which is heavier Aluminum (Al) or Iron (Fe)
Answer:
iron, it is more dense than aluminum
Explanation:
Answer:
Aluminium
Explanation:
1. How to elements differ from compounds?
Answer:
A compound contains atoms of different elements chemically combined together in a fixed ratio. An element is a pure chemical substance made of same type of atom. ... Elements contain only one type of atom.
Explanation:
Answer:
A compound is just like what it is- a group of atoms put together. A element is made up of only 1 atom.
Explanation:
I need helpp!! This is due tomorrow at 8 am it says to Calculate the density of a solid that has a mass of 32.5 g and displaces 6.7 mL of water.
1. Identifying two types of energy
2. Explaining how you know they are there
Answer:
Kinetic Energy and Potential Energy
Explanation:
When an object is in motion(ie.moving), it has kinetic energy. Energy stored in an object due to position and state, is called potential energy.
Which element is represented by the following Bohr model? *
p = 11
n 12
Answer:
A sodium atom.
Explanation:
A sodium atom contains 11 protons and 12 neutrons and its mass is 23.
an object has a mass of 45.0 g and a volume of 4.0 ml. what is its density?
Answer:
The answer is
11.25 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]Density = \frac{mass}{volume} [/tex]
From the question
mass = 45 g
volume = 4 mL
Substitute the values into the above formula and solve for the density
We have
[tex]Density = \frac{45}{4} [/tex]
We have the final answer as
11.25 g/mLHope this helps you
3. Describe air using the terms: mixture, atoms, and molecules.
I
Air is a mixture of gases. Air is composed of molecules such as oxygen, nitrogen and carbon dioxide. Air also contains atoms of noble gases such as neon, argon etc.
Air is composed of 21% molecular oxygen and 78% molecular nitrogen. Also, there is about 0.03% of carbon dioxide molecules in air.
Air is generally defined as a mixture of gases owing to the number of gaseous substances that compose air.
Also, there is a trace amount of noble gases which largely exists as monoatomic species in air.
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does a liquid have a shape??
Answer:
Yes, just not a fixed shape.
Explanation:
A liquid take shape of whatever is containing but that does not fix it. As long as it is being contained it retains it's shape, yet the second you release it from it's containment it becomes the shape and can take the physical properies of whatever it is contained by next.
Sabendo que os calores de combustão do enxofre monoclínico e do enxofre rômbico são, respectivamente, - 297,2 kJ/mol e - 296,8 kJ/mol, calcule a variação de entalpia na transformação de 1 mol de enxofre rômbico em enxofre monoclínico. S (mon.) + O2(g) SO2(g) ∆H1 = –297,2 kJ/mol S (rômb.) + O2(g) SO2(g) ∆H2 = –296,8 kJ/mol
Responda:
+ 0,9kJ / mol
Explicação:
Dados os calores de combustão do enxofre monoclínico e enxofre rômbico como - 297,2 kJ / mol e - 296,8 kJ / mol, respectivamente para a variação na transformação de 1 mol de enxofre rômbico em enxofre monoclínico conforme mostrado pela equação;
S (mon.) + O2 (g) -> SO2 (g)
Uma vez que são todos 1 mol cada, a mudança na entalpia será expressa como ∆H = ∆H2-∆H1
Dado ∆H2 = -296,8kJ / mol
∆H1 = -297,2kJ / mol
∆H = -296,8 - (- 297,2)
∆H = -296,8 + 297,2
∆H = 297,2-296,8
∆H = + 0,9kJ / mol
Portanto, a mudança na entalpia da equação é + 0,9kJ / mol
The energy produced in the stars results from
Answer:
Explanation:
Hydrogen fusion (nuclear fusion of four protons to form a helium-4 nucleus) is the dominant process that generates energy in the cores of main-sequence stars. It is also called "hydrogen burning", which should not be confused with the chemical combustion of hydrogen in an oxidizing atmosphere.
Convert 8.7 g to mg
Christy is a forensic scientist. She is given a white powder and asked to determine whether it’s sugar. She analyzes the white powder with a mass spectrometer in her lab. The test results reveal that the substance has a different molecular mass than sugar. What do these test results say about the initial hypothesis and what would be a reasonable next step for Christy’s investigation?
Answer:
A. is not
B. incorrect
C. identify substances that have the measured molecular mass
Explanation:
Since in the question it is mentioned that the Christy who is a forensic scientist and she gave a white powder and identify whether it is a sugar or not when she tested she seen that the molecular mass is different as compared with the sugar
So here it can be concluded that the white powder does not show a sugar that means it is not a sugar so automatically the hypothesis of Christy is wrong. And, the next step is to track the substance that shows the molecular mass i.e. measured
Answer:
- is not
-incorrect
- identify substances that have the measured molecular mass
Explanation:
What is the Causative agent
Syphilis?
Answer:
Explanation:
CAUSATIVE AGENTS. Syphilis is a chronic infectious disease caused by the spirochaete Treponema pallidum.
Support and explain your thinking with the emphasis on how you think offspring (babies) get their traits.
Answer:
The baby's get there traits from their parents and ancestors
How should you indicate that there are multiple polyatomic
ions in a chemical formula?
Answer: correct answer is C
Parentheses around the atoms in the ion an then added a subscript
Explanation:
A P E X
A 55.0 g piece of iron at 505 ° C is put into 735 grams of water at 15.0 ° C. What is the final temperature of the water and the iron?
Answer:
It would be 95.3
Explanation:
The density of gold is 19.3 g/cm3. What is the mass of 11.3 cm3 of gold? Show your work.
Answer:
218.09g
Explanation:
the formula for density is mass/volume
you have volume so rlly what you have is 19.3g/cm3=m/11.3cm3
so mass equals density x volume
and 19.3 x 11.3 = 218.09
brainliest to whoever answers, correctly.
Describe yourself based on food
If the half life of Substance A is 0.5 years, how long would it take for 2 grams of substance A to remain given an initial mass of 16 grams?
Time taken is given by :
[tex]t=-\dfrac{1}{k}\dfrac{[A_t]}{[A_o]}[/tex] .......( 1 )
Also,
[tex]k = \dfrac{0.693}{t_{0.5}}\\\\\\k=\dfrac{0.693}{0.5}\\\\k=2\times 0.693\ year^{-1}[/tex]
Putting value of k in equation 1, we get :
[tex]t=\dfrac{1}{2\times 0.693}\times ln(\dfrac{2}{16})\\\\t=1.5\ years[/tex]
Therefore, time taken is 1.5 years.
Hence, this is the required solution.
valid experiment for does water and oil mix
Answer: Water and oil cannot mix
Explanation:
What 2 tools do we use to measure volume?
Answer:
u
Explanation:
