Answer:
The correct answer is density, because intensive properties can be measured.
Explanation:
Intensive properties can be measured. Their values depend on the type of material and not the amount of matter we have. To measure density, we must first measure the volume of the block of wood with a measuring tape, then we can weigh the block of wood on a calibrated scale, and finally, calculate density as the ratio of mass to volume ( m/V).
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In a dilution ___ is added to a solution to decrease the concentration of the ___ however the number of moles of ___ will remain constant
During dilution, solvent is added to a solution to decrease the concentration
of the solution however the number of moles of solute will remain constant.
Dilution is the process by which a solvent such as water is added in order to
decrease the concentration of the solution. This is usually done to prepare
some specific substances or to reduce the harsh effect the concentrated
solution can cause.
The number of moles of the solute is unaffected by dilution as it only affects
the concentration of the solution.
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Gases emitted during volcanic activity often contain high concentrations of hydrogen sulfide and sulfur dioxide. these gases may react to produce deposits of sulfur according to the equation: 2 h2s(g) so2(g) → 3 s(s) 2 h2o(g) for the complete reaction of 6.41 mol of hydrogen sulfide:
In a volcanic reaction, two moles of hydrogen sulfide and sulfur dioxide react to form three moles of sulfur and two moles of water. Given 6.41 moles of hydrogen sulfide, 9.615 moles of sulfur would be formed. This reaction explains the presence of sulfur deposits in volcanic areas and contributes to the removal of hydrogen sulfide from volcanic emissions.
Explanation:In the given reaction: 2H₂S(g) + SO₂(g) → 3S(s) + 2H₂O(g), hydrogen sulfide (H2S) and sulfur dioxide (SO2) are converted into sulfur (S) and water (H2O). This is a common reaction that occurs during volcanic activities when gases are emitted. It explains the presence of sulfur deposits found in volcanic areas.
As indicated by the stoichiometry of the reaction, for each two moles of hydrogen sulfide reacted, three moles of sulfur are produced. Therefore, for the complete reaction of 6.41 moles of H2S, you would expect to form 3/2*6.41 = 9.615 moles of sulfur.
The reaction is an example of redox (reduction-oxidation) process. Here, hydrogen sulfide is oxidized to water, while sulfur dioxide is reduced to sulfur. The reaction, besides leading to the creation of sulfur deposits in volcanic regions, also contributes to the removal of hydrogen sulfide one of the gases found within volcanic emissions.
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What is the average speed of an object that travels 50 miles in 2 hours?
Question 3 options:
50 mph
25 mph
100 mph
2 mph
Why was Aristotle considered correct over Democritus based on their time period
Final answer:
Aristotle's ideas were favored over Democritus' because of his immense influence and the prevailing rationalist approach of the time which prioritized logic over empirical observation, leading to Aristotle's four-element theory of matter being accepted while Democritus' atomic theory was overlooked until much later.
Explanation:
Aristotle was considered more correct than Democritus during their time period because Aristotle was an incredibly influential philosopher, and his ideas were readily accepted by many. While Democritus had postulated that all matter was made up of tiny, indivisible particles called atoms, it was Aristotle's theory that everything was composed of four elements: earth, air, fire, and water that prevailed. The cultural and intellectual climate of the time favored logic and rational thought over empirical scientific methods, which meant that experimental verification of theories, like those of Democritus, wasn't pursued. Therefore, Aristotle's ideas held sway for nearly two thousand years before science recognized the validity of Democritus' concept of atoms.
Suppose you had a mixture of iron pellets, pebbles, and small wood spheres, all of which were about the same size. how would you seperate the mixture
Use a magnet to separate the magnetic iron pellets from the non-magnetic pebbles and wood spheres, then add water to the remaining mixture to float the wood and sink the pebbles for easy separation.
Explanation:To separate a mixture of iron pellets, pebbles, and small wood spheres that are about the same size, you can utilize their differing physical properties. Iron can be separated from non-magnetic materials using a magnet because the property of ferromagnetism is specific to certain metals, including iron. This process leaves you with pebbles and wood spheres.
Next, to separate the pebbles from the wood spheres, you might use water because wood floats and pebbles sink. By adding water to the mixture, the wood spheres would float to the surface, where they could easily be removed, and the pebbles would settle at the bottom of the container. Finally, removing the water would leave you with just the pebbles.
When water is heated in an ocean the liquid water changes from and turns into?
In a redox reaction, why does an element’s oxidation number increase?
A.) An element’s oxidation number increases because it gained electrons.
B.) An element’s oxidation number increases because it lost electrons.
C.) An element’s oxidation number increases because it was heated.
D.) An element’s oxidation number increases because it was reduced.
Answer: B) An element’s oxidation number increases because it lost electrons.
Explanation:
A redox reaction is a chemical reaction in which one or more electrons are transferred between the reactants, causing a change in their oxidation states.
The oxidation state or oxidation number is defined as the sum of positive and negative charges of an atom, which indirectly indicates the number of electrons that the atom has accepted or yielded.
By accepting electrons, the oxidation state of an atom decreases, becoming more negative, and therefore, it is reduced. On the other hand, an element that yields electrons increases its oxidation number and oxidizes.
In this way, an element’s oxidation number increase because it lost electrons, becoming a more positive ion.
What is the electron configuration of an element with atomic number 20?
Answer:
What is the electron configuration of an element with atomic number 20? 1s2 2s2 2p6 3s2 3p6 4s2
Explanation:
When converting the volume of water to mass of water, what conversion unit would you use?
A. one milliliter of water equals one milligram of water
B. one liter of water equals one gram of water
C. one liter of water equals one kilogram of water
D. one thousand liters of water equals one kilogram of water
A liter of water contains 1,000 cubic centimeters or 1,000 milliliters. Therefore, 1 Liter= 1,000 grams, or 1 Kilogram. 1 cubic centimeter= 1 milliliter = 1 gram.
Is sodium chloride a solid liquid or gas at room temperature?
What is the maximum number of atoms that a carbon atom can bond with in an organic compound?
Answer: 4 atoms
Explanation: Since carbon atom valency is 4 hence it forms 4 bonds with other 4 atoms.
As we know that carbon has atomic number-6 and electronic configuration 1s2 2s2 2p2
And it has 4 electrons in outer shell. These 4 electrons forms bind with other atoms.
Why is water important for a cell? A) Water is the main ingredient in DNA. B) Most chemical reactions in cells require water. C) All proteins are made of water. D) Water is an essential organic compound.
Consider the compound Pb(CO3)2 and answer the following questions:
a.Whats the name of the compound?
b.What is the molar mass of this compound? Explain how you calculated this value
a) Answer is: he name of the compound is lead(IV) carbonate.
In this compound, lead has oxidation number +4 and carbonate has oxidation number -2.
b) Answer is: the molar mass of this compound is 327.2 g/mol.
M(Pb(CO₃)₂) = Ar(Pb) + 2Ar(C) + 6Ar(O) · g/mol.
M(Pb(CO₃)₂) = 207.2 + 2 · 12 + 6 · 16 · g/mol.
M(Pb(CO₃)₂) = 327.2 g/mol.
The name of the compound is lead(IV) carbonate. The molar mass of this compound is 327.2 g/mol.
Compound is defined as a chemical substance made up of identical molecules containing atoms from more than one type of chemical element.
Molecule consisting atoms of only one element is not called compound.It is transformed into new substances during chemical reactions. There are four major types of compounds depending on chemical bonding present in them.They are:
1)Molecular compounds where in atoms are joined by covalent bonds.
2) ionic compounds where atoms are joined by ionic bond.
3)Inter-metallic compounds where atoms are held by metallic bonds
4) co-ordination complexes where atoms are held by co-ordinate bonds.
M(Pb(CO₃)₂) = Ar(Pb) + 2Ar(C) + 6Ar(O) · g/mol.
M(Pb(CO₃)₂) = 207.2 + 2 · 12 + 6 · 16 · g/mol.
M(Pb(CO₃)₂) = 327.2 g/mol.
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Imagine that you have a rectangular swimming pool, but you have no idea how deep it is. You
know that the pool has a volume of 216 m3
. You measured the dimensions of the pool and
found that it is 15 m long and 6 m wide.
A. Calculate the depth of the pool. Show your work.
Experiment 7 excess salt is added to water and the mixture is stirred until no more salt dissolves (the solution is saturated). the salt that does not dissolve is allowed to settle out. what will happen to the concentration of the salt in the solution if water evaporates until the volume of the solution is half the original volume? (assume the temperature remains constant.)
The neutralization reactions always produced which compound?
Waves move fastest in
low-temperature gases.
low-temperature solids.
high-temperature gases.
high-temperature solids.
Answer:
The correct answer is high temperature solids
Explanation:
The process where water changes from a liquid to a gas
Which value gives the number of particles in 1 mol of a substance? 6.02 mc012-1.jpg 1021 6.02 mc012-2.jpg 1022 6.02 mc012-3.jpg 1023 6.02 mc012-4.jpg 1024
How many valence electrons does an atom of any halogen have?
Carbon fixation involves the addition of carbon dioxide to _____. carbon fixation involves the addition of carbon dioxide to _____. 3-pga g3p nadph rubp rubisco
Carbon fixation is a part of photosynthesis where CO2 is added to RuBP to form 3-PGA and eventually glucose. The process is catalyzed by the enzyme RuBisCO and also involves the stages of reduction and regeneration.
Explanation:Carbon fixation is a process in photosynthesis where carbon dioxide (CO2) combines with a five-carbon sugar, ribulose bisphosphate (RuBP), to form a six-carbon compound. This reaction is catalyzed by an enzyme called RuBisCO. The six-carbon compound is then broken down into two molecules of 3-phosphoglycerate (3-PGA). This cycle, known as the Calvin cycle, involves not only fixation, but also the stages of reduction and regeneration. Reduction uses ATP and NADPH to convert the 3-PGA into glyceraldehyde 3-phosphate (G3P), some of which is used to build glucose. The remaining G3P is used to regenerate RuBP, using additional ATP, which allows the cycle to continue with more carbon fixation.
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Hotspot volcanoes occur along subduction zones.
a. True
b. False
What are the two main products of the light-capturing reaction of photosynthesis?
Answer: NADPH and ATP
Explanation:
Absolute zero is?
A.the lowest possible volume occupied by a gas.
B.the lowest possible temperature of a gas.
C.the lowest possible pressure exerted by a gas.
D.none of the above.
. An object with a mass of 6.0 kg accelerates 4.0 m/s2 when an unknown force is applied to it. What is the amount of the force? ______________________
Answer:
24 N
Explanation:
we have that an object of mass 6 kg has an acceleration of[tex]4 m/s^2[/tex] to find out the value of the unknown force that is applied we use the following formula
[tex]F= m.a[/tex]
The unit in which the force is expressed is in Newtons
[tex]N= kg.\frac{m}{s^2}[/tex]
[tex]F= 6.0 Kg. 4.0 \frac{m}{s^2}\\ F= 24 N[/tex]
The amount of the applied force is 24 N.
Net force on objectThe net force on an object is determined by applying Newton's second law of motion.
F = ma
where;
F is the applied forcem is the massa is accelerationF = 6 x 4
F = 24 N
Thus, the amount of the applied force is 24 N.
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How does a solid differ from a liquid?
b. how does a liquid differ from a gas?
c. how is a liquid similar to a gas?
d. what is a plasma?
Final answer:
Solids have a definite shape and volume, while liquids have a definite volume but their shape changes. Liquids and gases are both fluids, but gases do not have a definite shape.
Explanation:
A solid differs from a liquid in that it has a definite shape and a specific volume, while a liquid has a definite volume but its shape changes depending on the container it is in.
A liquid differs from a gas in that it does not have a definite shape and its molecules are closely packed together, while gas molecules are more spread out and can freely move around.
A liquid is similar to a gas in that both are considered fluids, meaning they can flow and take the shape of their container.
Plasma is a state of matter in which the particles are highly ionized and can conduct electricity. It does not have a definite shape or volume, and is similar to a gas in that its particles are not tightly packed together.
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The process of filtration was used to separate a sample into its components. What conclusion about the sample can be formed based on the technique used?
It was a pure substance.
It was a compound.
It was a heterogeneous mixture.
It was a homogeneous mixture
A sample of a gas originally at 29 °c and 1.25 atm pressure in a 3.0 l container is allowed to contract until the volume is 2.2 l and the temperature is 11 °c. the final pressure of the gas is ________ atm.
The question is about the combined gas law, which factors in pressure, volume and temperature changes in a gas sample. By inserting given values into the combined gas law equation, the final pressure comes out as approximately 1.558 atm.
Explanation:The question pertains to the principles of gas laws, particularly the combined gas law, which states that pressure, volume and temperature of a gas have an interlinked relationship, and thus change proportional to each other, provided the amount of gas is kept constant.
If we denominate the initial conditions as P1, V1 and T1 (in Kelvin), and the final conditions as P2, V2 and T2 (also in Kelvin), then the combined gas law can be written as:
P1*V1/T1 = P2*V2/T2
We know that P1=1.25 atm, V1=3.0 L, and T1=29°C = 302.15 K. The final Volume V2=2.2 L and final temperature T2=11°C = 284.15 K.
Substituting these values into the equation:
1.25 * 3.0/302.15 = P2 * 2.2/284.15
By calculating, we find that P2 = 1.558 atm, which is the final pressure of the gas.
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Which of these is a pair of isotopes? na+ and na cl-35 and cl-37 f and cl o2 and o3?
Answer:
Cl35 and Cl37.
Explanation:
That would be Cl35 and Cl37 . Two isotopes of the gas chlorine.
The electrons that are passed to nadp at the end of the electron transfer chain were obtained from