100 cm is meter stick.
Centimeter is denoted by the (cm). It is a metric unit of the measurement which is used for measuring the length of an object.
Meterstick is a foldable ruler which is used to measure the length, and it is common in the construction industry. They are made up of wood or plastic and often they have a plastic or metal joints so that they can be folded together.
A meter measuring stick, which is one meter (39.37 inches) long, it contains 100 centimeters. Thus, centimeter is equal to one-hundredth of a meter. The word centimeter comes from the late 18th-century. The word centimeter derived from the Latin root "centum"/ means "hundred" and the Greek root "metron", meaning "measure".
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The addition of electron shells results in _______ shielding of electrons from the nucleus.
Answer:
I believe the answer is "increasing"
Answer:
the shielding of electrons.
Explanation:
The nucleus pulls electrons to itself due to the net positive charge on it.As more electronic shell is added, the effect of the pull weakens outward.The inner shell experiences the nuclear pull more than the outer shell electrons.The hybridization of orbitals on the central atom in a molecule is sp. The electron-domain geometry around this central atom is ________.
A molecule's core atom experiences sp orbital hybridization. Around this primary atom, the geometry of the electron domain is linear.
In chemistry, hybridization is the idea of combining two atomic orbitals to create a new class of hybridized orbitals. Usually, this mixing creates hybrid orbitals with completely distinct energies, forms, etc. In hybridization, the same energy-level atomic orbitals are primarily involved. However, assuming they contain equal energy, both fully-filled and half-filled orbitals can participate in this process.
When two atomic orbitals unite to generate a hybrid orbital in a molecule, the energy of the orbitals of the individual atoms is redistributed to give orbitals of equivalent energy. Hybridization is the name given to this process. Atomic orbitals with similar points are brought together during the hybridization process.
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Hydrogen bonds are an especially strong type of dipole-dipole interaction What are oil and water examples of
An exceptionally potent type of dipole-dipole interaction is hydrogen bonding. Oil and water are examples of the effects of hydrogen bonding.
Hydrogen bonding are a type of dipole-dipole interaction that occur between the hydrogen atoms of one molecule and the nitrogen or oxygen atoms of another molecule. They are relatively strong interactions, about 5-10% as strong as a covalent bond, and are responsible for the unique properties of many biological molecules, such as DNA and proteins. Oil and water are examples of substances that demonstrate the effects of hydrogen bonding. Water molecules are polar, meaning that they have a partial positive charge on the hydrogen atoms and a partial negative charge on the oxygen atoms. This polarity allows water molecules to form hydrogen bonds with one another, giving water its high surface tension and making it a good solvent for polar substances. Oil, on the other hand, is composed of non-polar molecules such as alkanes and alkenes, which do not form hydrogen bonds with one another. As a result, oil is immiscible with water and will float on top of it, because it does not have the same kind of attractive forces between its molecules as water does, and also the oil molecules have a low polarity. In summary, hydrogen bonds are a type of dipole-dipole interaction that are relatively strong, and oil and water are examples of substances that demonstrate the effects of hydrogen bonding. Water molecules can form hydrogen bonds with one another, giving it the properties of high surface tension and making it a good solvent for polar substances, while oil is composed of non-polar molecules and it is immiscible with water, having low polarity.
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If 2.1 moles of NaCl is dissolved in a solution with a total volume of 7.3 liters, what is the molarity of the solution? Round to two decimals.
Answer:
The molarity of the solution is 0.29 [tex]\frac{moles}{liter}[/tex]
Explanation:
Molarity, or molar concentration, is a measure of the concentration of a solute in a solution, be it some molecular, ionic or atomic species. It is defined as the number of moles of solute that are dissolved in a given volume.
Molarity is calculated as the quotient between the number of moles of solutes and the volume of the solution:
[tex]Molarity=\frac{number of moles of solute}{volume}[/tex]
Molarity is expressed in units [tex]\frac{moles}{liter}[/tex].
In this case:
number of moles of solute= 2.1 molesvolume= 7.3 litersReplacing:
[tex]Molarity=\frac{2.1 moles}{7.3 liters}[/tex]
Molarity= 0.29 [tex]\frac{moles}{liter}[/tex]
The molarity of the solution is 0.29 [tex]\frac{moles}{liter}[/tex]
Answer:
M = 0.29 M
Explanation:
We are given;
Number of moles of NaCl; n = 2.1 moles
Total volume of solution; V = 7.3 L
Formula for molarity is;
M = n/L
Thus;
M = 2.1/7.3
M = 0.2878 M
Approximating to 2 decimal places gives;
M = 0.29 M
Why do the electrons stay in between the nuclei of the two hydrogen atoms chemthink
Electrons stay in between the nuclei of the two hydrogen atoms because they are attracted to the positive charge of the nuclei.
Electrons are negatively charged species, so they are attracted towards the positive charge of a nucleus.
In hydrogen atom, when both the two hydrogen atoms get close to each other then the electrons of each atom will get attracted to both the nuclei. And if both the hydrogen atoms come close to each other they will repel each other.
The energy of the two hydrogen atoms becomes less when they are together than when they are far apart.
Thus, the electrons tend to stay in between the nuclei of the two hydrogen atoms.
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How do temperature differences in the layers of Earth move magma?
A.Cooling magma becomes more dense and sinks, while hotter magma near the core is less dense and rises, moving magma in a cyclic path.
B.Cooling magma becomes less dense and sinks, while hotter magma near the core is more dense and rises, moving magma in a cyclic path.
C.Cooling magma becomes more dense and sinks, while hotter magma near the core is less dense and rises, moving magma in a linear path.
D.Cooling magma becomes less dense and sinks, while hotter magma near the core is more dense and rises, moving magma in a linear path.
Answer: A
Explanation:
Cooling magma becomes more dense and sinks, while hotter magma near the core is less dense and rises, moving magma in a cyclic path.
This answer was obtained from a credible source after doing some research.
The temperature differences in the layers of Earth move magma as cooling magma becomes more dense and sinks, while hotter magma near the core is less dense and rises, moving magma in a cyclic path.
What is magma?Magma is the molten or semi-molten natural material from which all igneous rocks are formed.Magma is found beneath the surface of the Earth, and evidence of magmatism has also been discovered on other terrestrial planets and some natural satellites.Besides molten rock, magma may also contain suspended crystals and gas bubbles.
Magma is produced by melting of the mantle or the crust in various tectonic settings, which on Earth include subduction zones, continental rift zones,mid-ocean ridges and hotspots. Mantle and crustal melts migrate upwards through the crust where they are thought to be stored in magma chambers or trans-crustal crystal-rich mush zones. During magma's storage in the crust, its composition may be modified by fractional crystallization, contamination with crustal melts, magma mixing, and degassing.
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anybody know the answer for these
KI - Ionic compound, KCl - Ionic compound,
C₆H₁₂O₆ - Covalent compound, KNO₃ - Ionic compound,
C₆H₄Cl₂ - Covalent compound, C₆H₅COOH - Covalent compound
CH₃COOH - Covalent compound, Parafin wax - Covalent
HCl - Covalent compound
What are ionic and covalent compounds?Ionic compounds can be classified as compounds formed between cation ions and an anion. A cation can be described as an electropositive ion and has the tendency to donate valence electrons. Similarly, anions are electronegative ions and have a tendency to accept electrons.
In an ionic compound, an ionic bond contains the complete transfer of electrons, therefore, there exists an electrostatic force of attraction that forms a strong bond.
In a covalent compound, the covalent bond exhibits the mutual sharing of electrons. Shared pairs of electrons are hard to give away as nuclei of two chemical elements together share the electrons and produce a bond stronger.
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CF4 + Br2 CBr4 + F2
Mole Ratio?
How many moles of F2 can you make from 57 g of CF4?
How many grams of Br2 do you have if you made 250 g of CBr4?
How many moles of F2 can you make from 4.8 mol of CF4?
Answer:
Answers are in the explanation
Explanation:
Based on the reaction:
CF₄ + 2Br₂ → CBr₄ + 2F₂
The mole ratio of CF₄ is:
CF₄:Br₂ = 1:2
CF₄:CBr₄ = 1:1
CF₄:F₂ = 1:2
Moles F2:
Molar mass CF₄: 88.0g/mol
57.0g * (1mol / 88.0g) = 0.6477 moles CF₄ * (2mol F₂ / 1mol CBr₄) =
1.30 moles F₂Mass Br2:
Molar mass CBr₄: 331.63g/mol
250.0g * (1mol / 331.63g) = 0.7539 moles CBr₄ * (2mol Br₂ / 1mol CF₄) =
1.51 moles Br₂ * (159.808g / mol) =
241g Br2Moles F2:
4.8 moles CF₄ * (2mol F₂ / 1mol CF₄) =
9.6 moles F₂
Openings in the leaves through which gases enter and leave
Answer:
Stomata
Explanation:
Stomata are epithelial cell structures found in tree leaves and needles that help promote plant growth and exchange carbon dioxide and water with the surrounding environment.
Stomata are tiny holes in the epidermis of leaves.
Stomata allow for gaseous exchange as well (oxygen and carbon dioxide).
Can anyone help me with this formula?
Answer:
[1] P4 + [3] O2=[2] P2O3
Explanation:
you can first solve for amount of O2 in the equation because reactant had O2 and product had O3, so the amount of O2 should be 3 and amount of O3 should be 2, which gets u to 6 moles of oxygen for both reactant and product. then you can balance the P4, and 1 mols of P4 = 2 moles of P2, which matches with the amount of mols for O3 as well. therefore you can get P4 + 3O2 = 2P2O3
how many carbon atoms are in 2.12 mol of propane. how many hydrogen atoms are in 2.12 mol of propane
There are 5,944 carbon atoms in 2.12 moles of propane, and 15,528 hydrogen atoms in 2.12 moles of propane.
What is carbon?
Carbon is an element that occurs in nature and is essential for life. It is the fourth most abundant element in the universe and is present in all living organisms. Carbon exists in many different forms, including graphite, diamond, amorphous carbon, and fullerenes. Carbon is a key component of organic molecules, which are the building blocks of life. Carbon also plays an important role in the global carbon cycle.
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When a new substance is formed, what kind of change has taken place? *
Physical Change
Chemical Change
O Phase Change
O None of the above
Answer:
Chemical Change
Explanation:
Physical change and phase change are both changes in the matter's state. Such as solid, gas and liquid. Not what it's made of. So when a new substance is formed, it' a chemical change.
What type of chemical reaction is this one?
C2H2 + O2 --> CO2 + H2O
Answer:
unbalanced
Explanation:
as the atoms on the one side do not equal to the atoms on the other sides
The following questions refer to the hypothetical reaction A + B products. The kinetics data given can be analyzed to answer the questions. [A]0 [B]0 Rate of decrease (mol/L) (mol/L) of [A] (M/s) 5.0 5.0 X 10.0 5.0 2X 5.0 10.0 2X Time (s) [B] (mol/L) 10.0 100 20.0 100 30.0 100 62. The rate law for the reaction is Rate = k[A]x[B]y. What are the values of x and y? A) x = 0 y = 1 B) x = 1 y = 0 C) x = 1 y = 1 D) x = 2 y = 1 E) x = 1 y = 2
To determine the rate law for the reaction A + B -> products, we need to examine how the rate of the reaction changes as the concentrations of A and B change. From the given data, we can see that when the concentration of A is doubled, the rate of the reaction also doubles. Similarly, when the concentration of B is doubled, the rate of the reaction also doubles. This indicates that the rate of the reaction is directly proportional to the concentrations of both A and B.
Based on this information, the rate law for the reaction can be expressed as Rate = k[A]*[B], where k is the rate constant. The exponents x and y in the rate law represent the order of the reaction with respect to A and B, respectively. Since the rate of the reaction is directly proportional to the concentrations of both A and B, the exponents x and y would both be equal to 1.
Therefore, the values of x and y are C) x = 1 and y = 1.
given a mixture of lead (2) oxide,ammonium chloride and sodium chloride,describe how this mixture can be separated to obtain a sample of each
Answer:
It can be done by crystallization, filtration, and sublimation. The easiest method among the three is separation by sublimation. Ammonium chloride sublimes upon heating. Actually, the sublimation is a decomposition of ammonium chloride forming ammonia and hydrogen chloride
Explanation:
0.25 moles of a gas at 760 mmHg and 298 K are contained in a 6.1 L bottle. What is the pressure of the system if the amount of gas in the bottle is reduced to 0.13 mole and the temperature is reduced to 100 K?
The pressure in the container can be calculated using Ideal gas law. The pressure of the gas at the reduced temperature will be 0.17 atm.
What is ideal gas law?Ideal gas law states the relation between volume, pressure, temperature and number of moles of a gas as written below:
PV = nRT.
Where R is the universal gas constant equal to 0.082 L atm/ K mol.
Given , T = 100 K
n = 0.13 moles
V = 6.1 L
Then, P = nRT/ V
The pressure of the gas at 100 K with 0.13 mole is calculated as follows:
P = (0.13 mole × 100 K × 0.082 L atm/ K mol) / 6.1 L = 0.17 atm.
Therefore, the pressure of the gas is 0.17 atm.
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This is your assignment: How much energy would it take to
change 15 grams of ice at -5 °C to steam at 110 °C?
Its five steps please show work
Answer:
45594J
Explanation:
Needed information in this question are;
Specific heat of ice = 2.06 J/g°C
Specific heat of water = 4.18 J/g°C
Specific heat of steam = 2.03 J/g°C
Heat of fusion of water ΔHf = 334 J/g
Melting point of water = 0 °C
Heat of vaporization of water ΔHv = 2257 J/g
Boiling point of water = 100 °C
- STEP 1:
Q1 = mcΔT
where
m = 15 grams
c (specific heat of ice) = 2.06 J/g°C
Tinitial = -5 °C
Tfinal = 0 °C
ΔT = (Tfinal – Tinitial)
ΔT = (0 °C - (-5 °C))
ΔT = 5 °C
Q1 = mcΔT
Q1 = (15 g) · (2.06 J/g°C) · (5 °C)
Q1 = 154.5 J
- STEP 2:
Q2 = m · ΔHf
where
m = 15 grams
ΔHf (heat of fusion) = 334 J/g
Q2 = m · ΔHf
Q2 = 15 · 334 J/g
Q2 = 5010 J
- STEP 3:
Q3 = mcΔT
where
m = 200 grams
c (specific heat of water) = 4.18 J/g°C
Tinitial = 0 °C
Tfinal = 100 °C
ΔT = (Tfinal – Tinitial)
ΔT = (100 °C – 0 °C)
ΔT = 100 °C
Q3 = mcΔT
Q3 = (15 g) · (4.18 J/g°C) · (100 °C)
Q3 = 6270 J
- STEP 4:
Q4 = m · ΔHv
where
m = 15 grams
ΔHv (heat of vaporization) = 2257 J/g
Q4 = m · ΔHf
Q4 = 15 · 2257 J/g
Q4 = 33855 J
- STEP 5:
Q5 = mcΔT
where
m = 15 grams
c (specific heat of steam) = 2.03 J/g°C
Tinitial = 100 °C
Tfinal = 110 °C
ΔT = (Tfinal – Tinitial)
ΔT = (110 °C – 100 °C)
ΔT = 10 °C
Q5 = mcΔT
Q5 = (15 g) · (2.03 J/g°C) · (10 °C)
Q5 = 304.5 J
Total heat = 304.5J + 33855 J + 6270 J + 5010 J + 154.5 J
= 45594J
How many moles are there in 9.115 grams of HCI?
I do not know, i just need points :/
7. What is one of the BEST actions the US government can take to slow global warming?
-provide tax credits to those who carpool
-encourage people to buy electronic books versus paperbacks or hardbacks
-produce commercials that urge people to recycle
-invest in clean technologies such as wind and solar power
one of the BEST actions the US government can take to slow global warming is invest in clean technologies such as wind and solar power
What is the US government doing about global warming?EPA works with industry and others to reduce greenhouse gas emissions through regulatory initiatives and partnership programs. Within the Agency, EPA implements a range of strategies to reduce its own greenhouse gas emissions, increase energy efficiency, and take other steps to reduce its carbon footprintReaching 100% carbon pollution-free electricity by 2035. Achieving a net-zero emissions economy by 2050. Delivering 40% of the benefits from federal investments in climate and clean energy to disadvantaged communitiesMobilizing a whole-of-government approach, the United States is scaling up action at home and abroad to put the world on a path to reach net-zero emissions by 2050 and to achieve the global goal on adaptation. Learn more about the United States at COP27 and the U.S. Center
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does calcium oxide reacts with carbon monoxide
Yes, calcium oxide (CaO) reacts with carbon monoxide (CO) to form calcium carbonate (CaCO3) and oxygen gas (O2). The reaction can be represented by the following equation:
CaO + CO -> CaCO3 + O2
This reaction is an example of a chemical change, as it results in the formation of a new substance with different chemical properties. The reaction is also exothermic, meaning that it releases heat.
Calcium oxide is a white solid that is used in a variety of applications, including cement production and the purification of flue gases. Carbon monoxide is a colorless, odorless gas that is toxic to humans when inhaled. It is produced as a byproduct of the incomplete combustion of fossil fuels.
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what is the pOH of a solution with [H3O+] = 8.2 x 10-5M?
Answer:The pOH of the solution is 9.914
Explanation:
pH is given as the negative logarithm (base 10) of the hydronium ion concentration [H₃O⁺] that is
pH= - log [H₃O⁺]
Since we are given [H₃O⁺]=8.2 x 10⁻⁵,
pH=- log (8.2 x 10⁻⁵)
pH= 4.086
The pOH gives s the measurement of the concentration of OH− ions, Hence,
pH + pOH= 14
from the above calculation, we got pH=4.086
So
4.086 + pOH=14
pOH= 14 - 4.086
pOH= 9.914
The pOH of the solution is 9.914
Is cannabinol soluble in 1-octanol?
Why or why not?
Answer: Uhmmmm this is what i got...-
Explanation:
It is a matter of fact that the hydrophobic (water-hating) oily compounds of cannabinoids such as CBD, THC and others are not water soluble. The term "water soluble" refers to materials which dissolve in water in a homogenous manner by becoming molecules or ions (such as sugar, alcohol, and salt).
Tropospheric ozone is rapidly consumed in many reactions, including:
SO3(g) + NO(g) --------> NO2(g) + O2(g)
Use the following data to calculate the instantaneous rate of the preceding reaction at t = 0. 000 s and t = 0. 0520 s. Express your answers to three significant figures.
Time (s) [NO] (M)0. 000 2. 00 x 10^-80. 0110 1. 80 x 10^-80. 0270 1. 60 x 10^-80. 0520 1. 40 x 10^-80. 1020 1. 20 x 10^-8
Part 1:
For t = 0. 000 s: ________ M/sPart 2:For t = 0. 052 s: _________ M/s
Part-1 The instantaneous rate at 0.000s is 1.8 ×10⁻⁷m/s.
Part-2 The instantaneous rate at 0.0s is 5.3×10⁻⁸m/s.
What do the terms average rate and instantaneous rate mean?The concentration change over a chosen time period is the average rate. When you take the measurements makes a difference. The instantaneous rate is the rate that exists at a specific time. The solution is found at that point by determining the slope of the tangent to the concentration vs. time curve.
Given chemical reaction,
SO₃(g) + NO(g) --------> NO₂(g) + O₂(g)
t = 0. 000s
instantaneous rate = 1.38×10⁻⁸ - 2.0×10⁻⁸/0.011 - 0.000
instantaneous rate = 1.8 ×10⁻⁷m/s
Therefore the instantaneous rate at 0.000s is 1.8 ×10⁻⁷m/s.
for t = 0.052s,
instantaneous rate = 1.2×10⁻⁸ - 1.6×10⁻⁸/0.102 - 0.027
instantaneous rate = 5.3×10⁻⁸m/s.
Therefore the instantaneous rate at 0.0s is 5.3×10⁻⁸m/s.
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Which one of the following compounds behaves as an acid when dissolved in water?
O CH3OCH3
O KOH
O H2SO3
O CH4
H2SO3, or sulfuric acid, is a compound that behaves as an acid when dissolved in water. The other compounds listed are either bases, alkanes, or ethers and are not acidic when dissolved in water.
H2SO3, or sulfuric acid, is a compound that behaves as an acid when dissolved in water. Acids are compounds that donate protons when dissolved in aqueous solutions, and sulfuric acid is one of the most common acids used in aqueous solutions. Other compounds listed, such as CH3OCH3, KOH, and CH4, are not acids when dissolved in water. CH3OCH3 is an ether, KOH is a base, and CH4 is an alkane. Acids will typically have a pH value less than 7, while bases have a pH greater than 7. H2SO3 is a strong acid with a pH value of around 1, making it the only compound listed that behaves as an acid when dissolved in water.
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Photosynthesis Notes
1. Give the Greek root word meaning for photoautotroph.
2. What was von Helmont testing with his willow tree experiment? What was the result?
3. Define the law of conservation of mass.
4.
Describe the experiment used by Joseph Priestly to discover oxygen.
5. List the primary constituents of air.
a.
b.
C.
d.
e.
6. What did Jan Ingenhousz discover about plants?
7. Based on the work of Nicolas de Saussure, what are the two primary sources of mass for
plants?
8. Define photosynthesis-
9. Define potential energy-
Photoautotroph has been derived from the combination of three words, photo -meaning "light", autos- meaning "self", and troph meaning "nutrition".
Land plants and photosynthetic algae are both photoautotrophs. These species contain pigments that can capture light, like chlorophyll. Origin of the word: photo- (light) + auto (self) + troph (nourishment). Autotrophs known as photoautotrophs generate complex chemical substances like proteins, lipids, and carbohydrates by absorbing light. Photosynthesis is the name given to this light-mediated process.
An energy-rich carbohydrate like glucose is produced by plants using carbon dioxide, inorganic salts, and water during a process called photosynthesis. As a byproduct, oxygen is also produced, other than glucose. Land plants and photosynthetic algae are both photoautotrophs. These species contain pigments that can capture light, like chlorophyll.
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An inland area has little water or plant life.
What would the climate of this place likely be?
The inland area has a Continental climate.
Inland climates are typically more severe. Summers might be quite hot, and winters could be very frigid. Rainfall can be scarce.
In inland area the water bodies take long time to heat up and cool down, so they absorb all the heat during the spring and summer when the sun is at its greatest before slowly losing it throughout the fall and winter when the temperature starts to drop.
On the other hand, it warms up and cools down far more quickly on land, that's why the inland are more cooler.
Inland absorbs and releases heat energy more quickly than water, inland places typically experience higher temperature variations from day to night and from season to season, so that inland is hotter area also.
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A student filled a dialysis tube with 97% water solution and sealed the ends. The tube and its contents had a mass of 55 grams. The student placed the tube in a solution, and the mass of the tube and its contents increased to 60 grams. Into which solution was the dialysis tube placed
The dialysis tube was placed in a solution with a higher concentration of solutes than the 97% water solution inside the tube.
What is solution?Solution is a way of resolving a problem or addressing an issue. It often involves identifying the underlying cause of the issue and then coming up with a plan that can be implemented to address the problem. Solutions may involve simple steps, such as changing a behavior, or they may involve more complicated processes that require multiple steps, such as creating new policies or procedures. Solutions should be designed to be effective, sustainable, and measurable.
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What would happen to the water’s boiling point if MgSO4 is added to it?
Answer:
When Epsom salt (magnesium sulfate) dissolves, it separates into its ions: a magnesium ion (Mg2+) and a sulfate ion (SO4 2-), which results in hard water. When hard water and soap are mixed, the magnesium ion reacts with soap molecules and forms a solid material called a precipitate, which does not dissolve.
Explanation:
can i have brainlest
Please answer. I will be picking the brainiest answer as well!
Pure oxygen boils at -183 ℃ and freezes at -219 ℃. What state will the oxygen be in if the temperature is brought to within 35 K of absolute zero?
Answer:
Solid.
Explanation:
Hello there!
In this case, according to the given description of the freezing and boiling point of oxygen, it turns out possible for us to figure out the phase of oxygen at 35 K by just subtracting 273:
[tex]35-273=-238\°C[/tex]
In such a way, since this temperature is lower than its freezing point of -219 °C, we infer that such sample will be solid.
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