Diffusion that is assisted by a channel protein or a carrier protein is called diffusion.
a. True
b. False
Answers
The given statement "Diffusion that is assisted by a channel protein or a carrier protein is called facilitated diffusion" is true because there is involvement of channel proteins.
Facilitated diffusion is a type of diffusion that involves the assistance of a channel protein or carrier protein to move molecules across the membrane. A channel protein creates a pore or channel in the membrane through which the molecules can move, while a carrier protein changes its shape to transport the molecules across the membrane. These proteins are selective and allow only specific molecules to pass through, depending on their size and charge.
Facilitated diffusion differs from simple diffusion in that it requires the help of proteins to move molecules across the membrane. In simple diffusion, molecules move down their concentration gradient without the need for any assistance. This means that facilitated diffusion can move molecules from areas of low concentration to areas of high concentration, which is the opposite of the direction of simple diffusion.
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Answer the following questions on a separate sheet of paper. 6. State the hypothesis of continental drift. 7. Why did most scientists reject Wegener ’s theory for nearly a half century? Building Vocabulary Fill in the blank to complete each statement. 8. All the continents were once joined together in a supercontinent called _____________________, meaning “all lands.” 9. A(n) _____________________ is any trace of an ancient organism preserved in rock. 10. Wegener ’s theory that the continents slowly moved over Earth’s surface became known as _____________________.
Answers
The continents previously comprised a single landmass when they drifted apart, as according Wegener's Atomic Hypothesis. Pangaea existed, according to Wegener, some 300,000 years ago.
What are the names of supercontinents?The Pangea, Gondwana, or Pannotia supercontinents were the most recent. Geologists believe that there were formerly three supercontinents: Nuna (also known as Columbia), Rodinia, or Ur. A single landmass which encompasses at least 75% of the world's territory is referred to be a supercontinent.
What made it a supercontinent, and why?A landmass thought up almost most or all of the land on Earth is known as a supercontinent. This term could be used to the landmass that is made up of modern-day Africa and Eurasia. Pangea was the most ancient supercontinent to include all of Earth's significant—and possibly most well-known—landmasses.
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Using the difference between the total volume of sodium hydroxide solution required to reach the second equivalence point and the volume of sodium hydroxide solution required to reach the first equivalence point, calculate the percent weight (g) by volume (mL), %(w/v), of phosphoric acid in the assigned cola.
Answers
Phosphoric acid (H3PO4) is a triprotic acid, meaning that it can donate three protons (H+ ions) in solution. Each proton has a different pKa value, which means that each proton is progressively more difficult to remove from the molecule. In an acid-base titration, the first equivalence point corresponds to the reaction of the first proton, the second equivalence point corresponds to the reaction of the second proton, and the third equivalence point corresponds to the reaction of the third proton.
In a titration of phosphoric acid with sodium hydroxide, the first equivalence point occurs when one mole of NaOH has reacted with one mole of H3PO4. At this point, the H3PO4 has been converted to H2PO4-, which is a weak acid with a different pKa value. The second equivalence point occurs when two moles of NaOH have reacted with one mole of H3PO4. At this point, the H2PO4- has been converted to HPO4^2-, which is an even weaker acid with a different pKa value.
To calculate the percent weight by volume of phosphoric acid in the assigned cola, we need to use the difference between the volume of NaOH required to reach the second equivalence point and the volume required to reach the first equivalence point. Let's call this difference "V".
Since the first equivalence point corresponds to the reaction of one mole of H3PO4, and the second equivalence point corresponds to the reaction of two moles of H3PO4, we can say that the difference in volume corresponds to the reaction of one mole of H3PO4. Let's call the concentration of the NaOH solution "C" (in units of moles per liter).
Therefore, we can write:
V = (1 mole H3PO4 / C) x (1000 mL / 1 L)
Solving for C, we get:
C = (1 mole H3PO4 / V) x (1000 mL / 1 L)
Now we need to use the density of the cola to convert the percent weight by volume to grams of H3PO4 per milliliter of cola. Let's call the density "D" (in units of grams per milliliter), and the percent weight by volume "%" (in units of grams per 100 mL).
Therefore, we can write:
% = (C x Molar mass of H3PO4) / D
where the molar mass of H3PO4 is 98 g/mol.
This equation gives us the percent weight by volume of H3PO4 in the assigned cola.
The percent weight by volume of phosphoric acid in the assigned cola is 0.263% (w/v).
To calculate the percent weight by volume of phosphoric acid in the assigned cola, need to follow these steps:
Determine the molecular weight of phosphoric acid, which is H₃PO₄ The atomic weights are: H=1, P=31, O=16. Therefore, the molecular weight of \(H_3PO_4\) is:
MW(H₃PO₄) = 3 x MW(H) + MW(P) + 4 x MW(O)
= 3 x 1 + 31 + 4 x 16
= 98 g/mol
Calculate the amount of phosphoric acid in the cola sample used in the titration. Let's assume used 25 mL of the cola sample for the titration, and found that it required 35 mL of 0.1 M sodium hydroxide solution to reach the second equivalence point, and 15 mL to reach the first equivalence point. The difference between these volumes is:
35 mL - 15 mL = 20 mL
This means that 20 mL of 0.1 M sodium hydroxide solution reacted with the phosphoric acid in the cola sample.
From the balanced chemical equation for the reaction between phosphoric acid and sodium hydroxide, know that 1 mole of H₃PO₄ reacts with 3 moles of NaOH. Therefore, the amount of H₃PO₄ in the cola sample is:
(20 mL x 0.1 mol/L) / 3 = 0.67 mmol
And the mass of \(H_3PO_4\) in the cola sample is:
0.67 mmol x 98 g/mol = 65.66 mg
Calculate the weight by volume percent of phosphoric acid in the cola sample. Since used 25 mL of the cola sample for the titration, the weight by volume percent of phosphoric acid is:
(65.66 mg / 25 mL) x 100% = 0.263% (w/v)
Therefore, the percent weight by volume of phosphoric acid in the assigned cola is 0.263% (w/v).
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How many grams of hydrogen gas are produced if 3.0 moles of magnesium are reacted with excess hydrochloric acid?
Answers
Answer k
Explanation: better luck
j.j. thomson discovered that cathode rays were really a stream of electrons.a. Trueb. False
Answers
The statement "J.J. Thomson discovered that cathode rays were really a stream of electrons" is true.
In 1897, J.J. Thomson conducted experiments on cathode rays and concluded that they were made up of negatively charged particles, which he named electrons. He also measured the charge-to-mass ratio of these particles and found it to be much smaller than that of any known atom, suggesting that they were subatomic particles.
Thomson's discovery of the electron revolutionized our understanding of atomic structure and laid the foundation for future discoveries in the field of atomic and particle physics. So, the statement that J.J. Thomson discovered that cathode rays were really a stream of electrons is true.
Hence, The statement "J.J. Thomson discovered that cathode rays were really a stream of electrons" is true.
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Predict the ordering, from shortest to longest, of the bond lengths in CO , CO 2 , and CO3^2-. Rank from shortest to longest. To rank items as equivalent, overlap them.
Answers
The bond lengths are in the following order, shortest to longest: COCO2CO32-
What is bond length ?
The equilibrium separation between two bound atoms' nuclei in a molecule is known as the bond length. Bond multiplicity results in a reduction in bond length. It can be measured using rotational, X-ray, and other spectroscopic techniques.
The triple bond is the shortest and strongest, the double bond is the shortest and weakest, and the single bond is the longest and weakest. As a result, the triple bond in CO makes it the shortest bond, the double bond in CO2 makes it shorter and stronger, and the combination of double and single bonds in CO32 makes it the longest and weakest bond. Carbon-carbon bonds, which are found in diamonds, are thought to be the longest bond length. It lasts for 154 minutes. It is the longest because of the three-dimensional structure of diamond and the covalent bonds that hold the carbon atoms together.
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Balance the following equations
Answers
ANSWER
2Ba + 2HBr → 2BaBr + H2
2BiCl3 + 3H2S → Bi2S3 + 6HCl
Br2 + 2KI → I2 + 2KBr
4Fe + 3O2 → 2Fe2O3
I HOPE THIS WILL HELP YOU IF NOT THEN SORRY HAVE A GREAT DAY:)Answer:
\(3Mg _{(s)} + N _{2(g)} → Mg_{3} N _{2(s)}\)
\(Ba _{(s)} + 2HBr_{(g)} → BaBr _{2(s)} + H _{2(g)}\)
\(2BiCl_{3(s)} + 3H_{2} S _{(g)} → Bi _{2} S _{ 3(g)} + 6HCl _{(g)} \\ \)
\(Br_{2(g)} + 2KI _{(g)} → I _{2(g)} +2 KBr _{(g)}\)
\(4Fe_{(s)}+ 3O_{2(g)} → 2Fe_{2} O _{3(s)} \)
When the pH of a solution is 2, the concentration of hydronium ions is10-2 M = 0.01 M. Is it acidic or basic?
Answers
Answer:
Explanations:
The formula for calculating the pH of the solution is given as:
\(pH=-log[H_3O^+]\)Given that the pH is 2, then;
\(\begin{gathered} 2=-log[H_3O^+] \\ log[H_3O^+]=-2 \\ [H_3O^+]=10^{-2} \\ [H_3O^+]=0.01M \end{gathered}\)Hence the concentration of the hydronium ion is 0.01M
Since the pH of the solution is less than 7, hence the solution is acidic
BALANCE THE EQUATION PLEASE 50 POINTS
Answers
Answer:
2C3H8S +13O2 =6CO2+8H20+2SO3
Answer:
ningwa answered it
Explanation:
get from (4,1) to (2,9) go up 8 and over 2 left (-2) - (4 - 2, 1 + 8), do this again (2 - 2, 9+8) and end up at (0,17) which is the y how do you change 7x+3y=3 into slope intercept form.
If the density of lead is 11.34g/.what is the density in kg/l
Answers
Answer:
0.01134kg
Explanation:
You divide by 1000 to get the kg
The antibiotic prontosil, developed by bayer pharmaceuticals in 1932, was used in saving the life of president roosevelt's son from severe strep throat in 1936. protonsil consists of two nitrogens bonded together in a double bond. the left nitrogen is bonded to a benzene ring where the para position contains a sulfur double bonded to two oxygen atoms and single bonded to n h 2. the right nitrogen is bonded to a benzene ring where one ortho and the para position each have an n h 2 substituent. substituent prontosil is an azo dye, which can be prepared from an aryldiazonium ion and an aromatic compound. draw the structures of the diazonium ion and the coupling component for this drug
Answers
Prontosil is a compound produced by the coupled reaction of an aryldiazonium ion and an aromatic compound.
What are diazonium compounds?
These are organic compounds in which there are ionic interactions between the azo group (-N₂⁺) and an anion X⁻.
The general structure is RN₂⁺X⁻.
R is the lateral chain that might be an aromatic ring, among other options.N₂⁺ is the azo groupX⁻ is the anionThe azo group characterizes as being unstable and reactive. This property is because one of the N atoms has a positive charge.
-N⁺≡ N
What is the coupling reaction of aryldiazonium compounds?Aryldiazonium salt reactions can occur in two ways,
Substitution reactionsCoupling reactionsCoupling reactions are the aromatic electrophilic substitution, where the aryldiazonium ion acts as an electrophile for an activated aromatic compound to attack it.
The coupling reaction occurs at the azo group level.
In the exposed example,
the benzene ring with sulfur bonded to oxygen atoms is the coupling componentthe benzene ring with NH₂ and the azo group is the diazonium ionIn the attached files you will find the drawings.
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how many elements have been discovered so far by scientists
Answers
Answer:
118 elements have been discovered so far
Explanation:
Tripling the concentration of a reactant increases the rate of a reaction nine times. With this knowledge, answer the following questions: (a) What is the order of the reaction with respect to that reactant?
(b) Increasing the concentration of a reactant by a factor of four increases the rate of a reaction four times. What is the order of the reaction with respect to that reactant?
Answers
Answer:
a) Tripling the concentration of a reactant increases the rate of a reaction nine times.the order of the reaction with respect to that reactant is 2
b)Increasing the concentration of a reactant by a factor of four increases the rate of a reaction four times.the order of the reaction with respect to that reactant is 1.
Explanation:
a) The order of the reaction with respect to that reactant is 2. The rate law of the reaction with the stoichiometric coefficients a, b, and c would be as follows:
rate = k[A]^x[B]^y[C]^z
Where k is the rate constant and x, y, and z are the orders of the reaction with respect to the corresponding reactants. When [A] is tripled, the rate increases nine times, indicating that the rate is proportional to [A]^2. Therefore, the order of the reaction with respect to [A] is 2.
b) The order of the reaction with respect to that reactant is 1. The rate law of the reaction with the stoichiometric coefficients a, b, and c would be as follows:
rate = k[A]^x[B]^y[C]^z
When [A] is quadrupled, the rate increases four times, indicating that the rate is proportional to [A]. Therefore, the order of the reaction with respect to [A] is 1.
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look at image please
Answers
The mass of oxygen gas produced, given that 15.8 g of potassium permanganate is heated until no more oxygen gas is given off is 1.6 g
How do i determine the mass of oxygen produced?From the question given, the following data were obtained:
Mass of potassium permanganate = 15.8 gMass of remaining material after heating = 14.2 gMass of oxygen gas =?The mass of oxygen gas produced from the reaction can be obtained as follow:
Mass of potassium permanganate = Mass of remaining substance + mass of oxygen
Inputting the given parameters, we have:
15.8 = 14.2 + mass of oxygen
Collect like terms,
Mass of oxygen = 15.8 - 14.2
= 1.6 g
Thus, we can conclude that the mass of oxygen gas produced from the reaction is 1.6 g
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Example: Ba8Mu7
Beanium shroomium
Beanium shroomide
Octabeanium heptashroomide
Name these Covalent Compounds using the “Periodic Table of Food”:
7. PeMu2
8. BaPo5
9. SpMu
10. Br2E7
11. Br3Pe
12. PeE4
Answers
Answer:
Here are the answers:
7. phosphorus molybdenum diboride
8. barium phosphite
9. sulfur molybdenum
10. dibromine heptoxide
11. tribromine phosphide
12. phosphorus tetrasulfide
What happens to the intensity of light emitted from stars the further away the star is from us?
Answers
Answer: stars vary in their effective temperature and colour. A hot star radiates more energy per second per metre surface area than a cooler star. Does this then mean that a hot star is going to appear brighter to us than a cooler one? The answer to this actually depends on a few factors
Explanation: pa brainiest po
Use the balanced equation to solve the problem.N2 + 3H22NH323.0g NH3 are made.How many liters of H₂ gas reacted at Stp? L
Answers
By using the ideal gas law to get volume we have"
\(V=\frac{nRT}{P}\)Where v is volume, T is temperatute, n is number of moles, R is the molar gas constant and P is pressure. At STP P= 101,325 Pa, T= 273.15 K and R= 8.314 J/mol K
\(\begin{gathered} \frac{RT}{P}=0.022414cm^3mol^{-1} \\ \\ V=0.0022414n \end{gathered}\)We must first convert mass to moles:
\(\begin{gathered} mole=\frac{mass}{molecular\text{ }mass} \\ mole=\frac{23.0g}{17.0g\text{ }mol^{-1}} \\ \\ mole=1.35 \end{gathered}\)\(To\text{ }determine\text{ }the\text{ }moles\text{ }of\text{ }H2\text{ }gas\text{ }reacted\text{ }we:\frac{2}{3}\times1.35=0.87\text{ }mol\)By substituting this value into the ideal gas law we have:
\(\begin{gathered} V=0.0022414cm^3mol^{-1}\times0.87mol \\ V=0.0019502cm^3 \\ \\ V=1.9502\times10^{-6}L \end{gathered}\)1.9502e-6L of H2 gas reacted at STP
In the chemical reaction seen here:
Which of the following would be considered "Reactants"?
2 Ca,SiO, +7 H,O3 CaO +2510, 4H,0+3 Ca(OH),
volcanic_ash_reaction
O Calcium Silicon pentaoxide and water
O-173.6 KJ
O Silicon dioxide hydrate and Calcium silicon dioxide
Ocalcium Oxide and water
Answers
When atoms establish or break chemical bonds, chemical processes take place. Reactants are the chemicals that begin a chemical reaction, while products are the compounds that are created as a result of the reaction.
When a volcano erupts, glass, rock, and mineral particles are mixed together to form volcanic ash. Less than 2 millimetres in diameter, the particles are very tiny. They have a low density since they are frequently pitted and have numerous holes. In hydrated Portland cement, CSH is the primary factor in the development of strength, while calcium hydroxide is another hydration agent.
Silica granules generate non-explosive dusts when they are suspended in the atmosphere. To create silicates, silica can interact with other metallic elements and oxides. A silicon atom is covalently joined to two oxygen atoms to form silicon dioxide, a kind of silicon oxide composed of linear triatomic molecules.
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Is modulus of elasticity and Young's modulus same?
Answers
Yes, modulus of elasticity and Young's modulus are the same thing. Young's modulus is a measure of the stiffness of a solid material, it defines the ratio of stress to strain in the linear elastic region.
The modulus of elasticity is a more general term that can refer to any type of elasticity modulus, including Young's modulus. However, in most cases, when people refer to the modulus of elasticity, they are talking about Young's modulus.
Young's modulus is an important property of materials, as it can help predict how they will behave under stress and strain. Materials with a high Young's modulus are stiffer and less elastic, while materials with a low Young's modulus are more flexible and elastic. Young's modulus is used in many fields of engineering, including mechanical, civil, and materials engineering, to design and test structures and materials.
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HELPPPP!!!!
Four students were asked to identify the part of an atom that determines the atom's identity and chemical properties. The student's responses are shown in the chart below. Which of the student's responses is correct?
Answers
Answer:
The number of protons is what determines a atoms identity.
This means that student 3 is correct.
Explanation:
i just need an explanation :) so the problem was " what is the mass of 5 molecules of water(H2O) , in grams?" my teacher said the answer is 1.50 x 10^-22 but i dont understand why. why is it not 1.50 x 10^24, why is the exponent negative?
Answers
Answer:
Explanation:
The exponent is negative because water molecules are absolutely tiny. You can't see a molecule of water on the palm of your hand with your naked eyes, right? If a the mass of a molecule was 1.50 x 10^24, it'd be HUGE... like absolutely massive (possible the size of your city). Molecules are just tiny, tiny particles
what is the latin name of copper, sulfur, Tin
Answers
Copper = Cuprum
Sulfur = Sulfurium
Tin = Stannum
why would a sample that is not finely ground create difficulties in a melting point determination? give two reasons
Answers
A sample that is not finely ground creates difficulties in melting point determination due to inconsistent sample size and poor heat transfer. To obtain accurate results, it is essential to grind the sample finely, ensuring uniform particle size and efficient heat transfer during the melting point determination process.
A sample that is not finely ground can create difficulties in a melting point determination for two main reasons.
Firstly, larger particle sizes can lead to an inaccurate melting point reading. When a sample is not finely ground, it may contain larger particles that have a higher melting point than the rest of the sample. These particles can take longer to melt than the rest of the sample, leading to a broader and inaccurate melting point range.
This can make it difficult to accurately determine the true melting point of the sample, which is important for identifying its chemical properties.
Secondly, a sample that is not finely ground can also result in poor heat transfer, leading to an inaccurate melting point determination. During a melting point determination, the sample needs to be heated at a constant rate to ensure accurate results.
However, larger particles may not conduct heat as effectively as smaller particles, which can lead to localized overheating or underheating. This can cause the sample to melt at a higher or lower temperature than expected, leading to inaccurate melting point readings.
Therefore, it is important to finely grind a sample before conducting a melting point determination to ensure accurate and reliable results.
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Your friend in a lab is reading and IR spectra and shows you there is an absorption band between 1700 - 1800 cm -1 squared. Which of the following could NOT Be the compound being tested?
Answers
The compound being tested could not be a simple alkane such as methane, ethane, propane, or butane as they do not have any absorption bands in the 1700-1800 cm-1 range in their IR spectra.
Based on the absorption band between 1700-1800 cm⁻¹ in the IR spectra, it is likely that the compound being tested contains a carbonyl group (C=O). Therefore, any compound that does NOT have a carbonyl group would not be the one being tested. Without a list of specific compounds to choose from, I cannot provide an exact answer.
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How many grams of water can be vaporized with 6500 J of energy? The heat of
vaporization for water is 2330 J/g.
Answers
Given :
The heat of vaporization for water is 2330 J/g.
To Find :
How many grams of water can be vaporized with 6500 J of energy.
Solution :
It is given that heat of vaporization for water is 2330 J/g.
Means 2300 J of heat is required to vaporize 1 g of water .
Let , n grams of water is produced by 6500 J of energy .
\(n=\dfrac{6500\ J}{2330\ J/g}\\\\n=2.79\ g\)
Therefore, 2.79 g of water will vaporize by 6500 J of energy .
Hence, this is the required solution .
how does dalton's theory explain the process of chemical change.
Answers
Dalton's theory, also known as the atomic theory of matter, provides a fundamental understanding of chemical change. According to this theory, atoms are indivisible and indestructible particles that combine in fixed ratios to form compounds. In the process of chemical change, known as a chemical reaction, atoms are rearranged, but they are neither created nor destroyed.
In more detail, Dalton's theory explains that when a chemical reaction occurs, the bonds between atoms are broken and new bonds are formed, resulting in the creation of different substances. These reactions occur due to the rearrangement of atoms and the redistribution of their electrons.
For example, in the reaction between hydrogen and oxygen to form water, Dalton's theory explains that the hydrogen and oxygen atoms combine in a fixed ratio of two hydrogen atoms for every one oxygen atom. The reaction involves breaking the bonds between hydrogen and oxygen molecules and forming new bonds between hydrogen and oxygen atoms to create water molecules.
Overall, Dalton's theory provides a framework for understanding how chemical changes occur through the rearrangement of atoms and the formation of new substances with different properties.
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Karsten performed a scientific study on the way that a certain chemical affects ecosystems. After Karsten published his results, one of his peers said that Karsten's conclusion was influenced by selection bias. What did Karsten's peer mean by this statement?
A.
Karsten did not choose the correct topic to study.
B.
Karsten did not spend enough time studying the chemical.
C.
Karsten's data did not support his published conclusion.
D.
Karsten's results could have been different in other ecosystems.
Answers
Answer:
C
Explanation:
What makes a person scientifically literate? In three to five sentences, explain your answer.
Answers
It means that a person has the ability to describe, explain, and predict natural phenomena. Scientific literacy entails being able to read with understanding articles about science in the popular press and to engage in social conversation about the validity of the conclusions. Scientific literacy implies that a person can identify scientific issues underlying national and local decisions and express positions that are scientifically and technologically informed. A literate citizen should be able to evaluate the quality of scientific information on the basis of its source and the methods used to generate it. Scientific literacy also implies the capacity to pose and evaluate arguments based on evidence and to apply conclusions from such arguments appropriately.
hope this helps and sorry if this is wrong
What are the major organic products are formed when the following compounds react with methylmagnesium bromide (ch3mgbr), followed by the addition of dilute acid? propanal 2-pentanone
Answers
When propanal reacts with methylmagnesium bromide (CH3MgBr) followed by the addition of dilute acid, the major organic product formed is 3-hydroxypropan-1-ol (also known as 1-propanol). This reaction is an example of an addition reaction.
For 2-pentanone, the major organic product formed is 2-pentanol. The methyl group from CH3MgBr adds to the carbonyl carbon of 2-pentanone, resulting in the formation of an intermediate. The intermediate is then protonated by the dilute acid, leading to the formation of the alcohol.
In both cases, the addition of CH3MgBr followed by the addition of dilute acid results in the conversion of the carbonyl group into a hydroxyl group, forming alcohols as the major organic products.
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When is a rock considered an ore?
Check all that apply.
-when it occurs in sufficient amounts to be used to build roads and buildings
-only when it contains lead
-when it contains at least one metallic mineral in sufficient amounts to be extracted profitably
-only when it contains iron
-when it contains fluorite or sulfur minerals in sufficient amounts to be extracted profitably
Answers
The correct statements are that a rock is considered an ore when it contains at least one metallic mineral in sufficient amounts to be extracted profitably and when it contains fluorite or sulfur minerals in sufficient amounts to be extracted profitably.
When it contains at least one metallic mineral in sufficient amounts to be extracted profitably.
When it contains fluorite or sulfur minerals in sufficient amounts to be extracted profitably.
Step-by-step explanation:
When it occurs in sufficient amounts to be used to build roads and buildings: This statement is incorrect. Rocks that are used for construction purposes, such as limestone or sandstone, are not considered ores unless they also contain economically valuable minerals.
Only when it contains lead: This statement is incorrect. Ores are not limited to containing only lead. Ores can contain various metallic minerals, not just lead.
When it contains at least one metallic mineral in sufficient amounts to be extracted profitably: This statement is correct. Ores are rocks that contain valuable metallic minerals in concentrations that make extraction economically feasible. These minerals can include gold, silver, copper, aluminum, zinc, and many others.
Only when it contains iron: This statement is incorrect. While iron ores are commonly known and widely used, ores are not limited to containing only iron. There are numerous other metallic minerals that can be extracted profitably from rocks.
When it contains fluorite or sulfur minerals in sufficient amounts to be extracted profitably: This statement is correct. Fluorite and sulfur are examples of non-metallic minerals that can be extracted profitably from rocks, and if a rock contains these minerals in sufficient quantities, it can be considered an ore.
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Which list only includes terms that describe oxygen, gas, and O2?
A. Compound, molecule, pure substance
B. Element, molecule, pure substance
C. Atom, compound, molecule
D. Atom, element, molecule
Answers
Oxygen is an element, gas is a molecule and O2 is a pure substance.
Hope this helps
Oxygen gas O2 is a compound, a molecule and a pure substance.
Oxygen gas is a compound because it contains more than one atom( two oxygen atoms) that are chemically combined together.
Oxygen gas is a molecule because it can exist independently as a unit and the oxygen atoms are covalently bound.
It is a pure substance because it contains only oxygen molecules.
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