Answer:
True
Explanation:
Mixtures are substances with indefinite composition. They consist of two or more elements and or compounds in any proportion by mass.
Their constituents retain their identities i.e. physical properties are retained. Their constituents reacts differently to changed conditions. They can easily be separated into constituents by physical methods.From these properties we can clearly identify that to separate mixtures, we use the differences in the chemical properties of the constituents of the mixtures.
what is the source of the force that moves the tectonic plates along this plate boundary
Answer:
Mantle convection
Explanation:
The source of the force that moves tectonic plates along plate boundaries is as a result of the mantle convection.
Heat energy produced in the mantle especially from radioactive decay is a very important source of internal heat that drives plate motion. Denser and cold materials close to the over-riding lithosphere above sinks deep into the mantle. Hotter and lighter materials rises to the surface. This sets up a convection cell by which the plates above are driven.What causes your skin to feel warm when it is in the sun on a summer day?
A Particles in the atmosphere reflect energy from the Sun downward.
B Hot particles from the Sun still carry some heat when they reach your skin.
C The solar wind carries heated air from the Sun's atmosphere to Earth's surface.
D The Sun radiates energy that passes through space and the atmosphere to your skin.
Answer:
idek akxkkwskkd nwkdkekekd
suspension are mixtures composed of materials that are visible to the naked eyes true or false? in science subject
Answer:
True
Explanation:
Suspensions are referred to as mixtures composed of materials which are visible to the naked eyes . They are usually insoluble in the solvent .
The mixtures which are composed of materials and at the same time non visible to the naked eyes due to their very tiny size are referred to as colloids or colloidal particles in the field of science.
I NEED HELP THIS IS FROM MY HOMWORK DUE IN A HOUR
Answer:
Increasing the speed of the particles
Explanation:
The energy absorbed in the phase B is used to increase the speed of the particles.
We can see a positive slope which shows that the temperature is increasing considerably with increasing time.
At this phase the reaction rate is become faster as the temperature change has a considerable effect on reaction rates.
Temperature is directly proportional to the average kinetic energy of reacting particles.
At a particular pressure and temperature, nitrogen gas effuses at the rate of 79 mL/s. Under the same conditions, at what rate will sulfur dioxide effuse?
Rate of Sulfur dioxide : 2730.44 mL/s
Further explanationGraham's law: the rate of effusion of a gas is inversely proportional to the square root of its molar masses or
the effusion rates of two gases = the square root of the inverse of their molar masses:
[tex]\rm \dfrac{r_1}{r_2}=\sqrt{\dfrac{M_2}{M_1} }[/tex]
or
[tex]\rm M_1\times r_1^2=M_2\times r_2^2[/tex]
MW of N₂ = 28 g/mol
MW SO₂ = 64 g/mol
[tex]\tt 28\times 79^2=64\times r_2^2\\\\r_2^2=\dfrac{28\times 79^2}{64}=2730.44~mL/s[/tex]
What happens when the compound MgO is formed?
Answer:
Oxygen receives two electrons from magnesium
Explanation:
You have two containers. The first container contains 22.99 grams of solid
sodium (Na). The second container contains 15.999 grams of Oxygen (O).
Which container has more moles of the indicated substance? *
Answer:
The sodium has more moles.
n(Na)=2.09 mole
n(O)=0.999 mole
Of the following, which element has the highest first ionization energy?
S
F
CI
O
Answer:
F
General Formulas and Concepts:
Ionization Energy (I.E): Amount of energy (joules) needed to remove an electron from the atomPeriodic TrendsExplanation:
The trend for 1st I.E increases to the right and up. Therefore, the top right corner of the Periodic Table would have the highest 1st I.E.
Oxygen and Fluorine are in Period 2 while Sulfur and Chlorine are in Period 3. We then know that Oxygen and Fluorine will have higher I.E's than Sulfur and Chlorine.
Oxygen is in Group 16 while Fluorine is in Group 17. Since Fluorine is farther to the right of the Periodic Table, it will have the highest I.E out of all 4 elements.
The reason why F has a larger I.E than O is because F has a larger Zeff. Since Fluorine has more protons in the nucleus than O, the FOA between the nucleus and the e⁻ are greater than those of O. Therefore, it takes more energy to remove an e⁻ from F than O.
The reason why F has a larger I.E than S and Cl is because S and Cl have more shielding effect than F. Since S and Cl has more core e⁻, it weakens the FOA between the nucleus and the outermost shell e⁻, thus making it easier to remove. F has less core e⁻ and therefore there is less of a shielding effect and thus the FOA is larger and requires more energy to remove.
In which statement does the word theory mean scientific theory?? A) In theory, the experiment will work as planned. B) She has a theory about why the storm arrived later than predicted. C) The atomic theory explains that material objects are made up of atoms. D) The doctor’s prescription for curing a cold is based on his best theory or guess.
Answer: C
Explanation:
I took a quiz on this.
Which statement about hydrogen bonds is true?
Explanation:
Hydrogen bond is a type of intermolecular chemical bond formed between two molecules. It is classified as a special dipole-dipole attraction between polar molecules in which a hydrogen atoms is directly joined to a highly electronegative atom.
A hydrogen nucleus has a high concentration of positive charges. A hydrogen bond is actually an electrostatic attraction between the hydrogen atom (nucleus of one molecule and the electronegative atom, O or N or F) of a neighboring molecule. The strength of the bond depends on the relative electronegativity of the atom directly joined to the hydrogen. Hydrogen bonding forces is reflected in the physical properties of compounds such as water and ammonia.The proportion of the electronegativity of an atom that is directly hydrogen bonded to the hydrogen determines how strong the connection will be. This statement is true about hydrogen bonds.
An intermolecular chemical interaction known as a hydrogen bond is created when two molecules come together. When a hydrogen atom is linked directly to an atom that has a strong electronegative potential, it is categorised as a specific case of dipole-dipole attraction among polar molecules.
A hydrogen bond is essentially an electrostatic attraction among a neighbouring molecule's O, N, or F atom and its hydrogen atom, which is the nucleus of one of the molecules.
The proportion of the electronegativity of an atom that is directly bonded to the hydrogen determines how strong the connection will be.
Compounds like water and ammonia have physical characteristics that are influenced by hydrogen bonding forces.
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Suppose that you are a scientist who studies climate changes. While examining the rings of tree trunks, you notice several very large tree rings. What can you conclude about the climate during those years?
Answer:
The climate was wet and cold
Explanation:
Answer:
The large tree rings allow you to conclude that the climate was either very warm or wet during those growing seasons, because greater than normal growth occurred.
Explanation: It is the edge sample response
Explain the process of sedimentation
Answer:
Am coming to answer you ok
FILL IN THE BLANKS (IMAGES ATTACHED)
Answer:
1chemical properties
2.chrmistry
3.precipitate
4.endothermic reaction
5.matter
6.physical property
7.chemical change
8.exothermic reaction
9.physical change
NEED ANSWERS NOW 100 PTS
Is iron iii fluoride ionic or covalent
Is carbon disulfide ionic or covalent
Answer:
iron i believe is ionic and carbon is covalent
Explanation:
if im wrong correct me
Everything in outer space including stars, planets, and galaxies
O A. Solar System
B. Universe
OC. Galaxy
D. Biosphere
I
Answer:
Universe.
Explanation:
Biosphere is just a planet. Solar system contains planets and star. Galaxy holds multiple solar systems only. Universe hold everything, biospheres, solar systems, and galaxies. I hope this helps :D
Answer:
B.
Explanation:
A solar system is IN a galaxy. Its not A.
A Galaxy doesnt have other galaxies in it. Its not c
A biosphere is only referring to earth. its not D.
Therefore, it is B. A universe is everything in outer space including stars, planets, and galaxies.
HEEEELLLPPPP PLEASE I WILL MARK BRAINLIEST
What is the formula for Copper i Monohydrogen Phosphate?
Answer:
Na2HPO4
Explanation:
The chemical formula for Copper I Monohydrogen Phosphate is CuHPO₄.
Let's break down the formula to understand it better:
1. "Cu" represents copper, which is an element with the atomic symbol Cu. Copper is a transition metal that is commonly used in electrical wiring and plumbing.
2. "H" represents hydrogen, which is an element with the atomic symbol H. Hydrogen is the lightest and most abundant element in the universe.
3. "PO₄" represents the phosphate ion, which is composed of one phosphorus atom (P) and four oxygen atoms (O). The phosphate ion is commonly found in biological systems and is an essential component of DNA, RNA, and ATP.
So, when combined one copper atom (Cu), one hydrogen atom (H), and one phosphate ion (PO₄), get the formula CuHPO4, which represents Copper I Monohydrogen Phosphate.
It's important to note that the "I" in Copper I refers to the charge of the copper ion in this compound. Copper can form different ions with different charges, and the Roman numeral indicates the charge of the copper ion in this particular compound.
Thus, chemical formula for Copper I Monohydrogen Phosphate is CuHPO₄.
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Calculate the number of moles of MgF2 that dissolved.
Moles of MgF₂ : 1.2 x 10⁻⁴
Further explanationMaybe the complete question is like this
A student prepares 100. mL of a saturated solution of MgF2 by adding 0.50 g of solid MgF2 to 100. mL of distilled water at 25°C and stirring until no more solid dissolves. (Assume that the volume of the undissolved MgF2 is negligibly small.) The saturated solution is analyzed, and it is determined that [F−] in the solution is 2.4 × 10−3 M.
The dissociation reaction of MgF₂
MgF₂(s)⇒ Mg²⁺(aq)+2F⁻(aq)
mol ratio MgF₂ : F⁻ = 1 : 2
mol of F⁻ in 100 ml solution :
[tex]\tt mol=M\times V\\\\mol=2.4\times 10^{-3}\times 0.1=2.4\times 10^{-4}[/tex]
mol MgF₂ :
[tex]\tt \dfrac{1}{2}\times 2.4\times 10^{-4}= 1.2\times 10^{-4}[/tex]
Industrially, vanadium metal, which is used in steel alloys , can be obtained by reacting vanadium oxide with calcium at high temperature:5Ca+V2O5➡️5CaO+2V
In one process, 1.540❎103g of V2O5 react with 2.010❎103gCa
A)Calculate the theoretical yield of v
B) calculate the percent yield if 823.0 g of V are obtained
Answer:
I think it's b probably wrong
How many grams of hydrogen chloride are in 50. mL of 11 M HCl solution?
Answer:
20,075 g
Explanation:
Solution at attachment box
Firstly i found the mole of HCLwhich we needed
After that I found the gram of HCL which we needed
M.V=n
The mass of hydrogen chloride present in 50. mL of 11 M HCl solution is 20.08g. Details about mass can be found below.
How to calculate mass?The mass of a substance can be calculated by multiplying the number of moles of the substance by its molar mass.
However, the number of moles of Hydrogen chloride must be calculated first as follows:
Molarity = no of moles/volume
no of moles = 11M × 0.05L
no of moles = 0.55mol
mass of HCl = 0.55 mol × 36.5g/mol
mass of HCl = 20.08g
Therefore, the mass of hydrogen chloride present in 50. mL of 11 M HCl solution is 20.08g.
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The Venmo diagram compares protons with electrons. Which shared property belongs in the region marked B?
A 100.0 lb skier moves at 40.00miles/hour. Calc her kinetic energy.
answer: its 7290 joules.
explanations: the first procedure is to convert 1 pound to kilogram. 1 kg = 2.205 hence given 100 lb so we cross multiply. 1 kg * 100 = 2.205 * x
hence x= 45 kg. let's convert 1 mile per hour = 0.45 metre per second we cross multiply by 40 mile per hour. x= 40 * 0.45= 18 m/s.
KE= 1/2 * 45 * (18)^2
= 1/2 * 45 * 14580
= 7290joules
According to valence bond theory, which atomic orbitals of carbon may be hybridized to account for bonding? Why?
.
A. Only 2p orbitals may hybridize; the 2p orbital is carbon’s highest-energy atomic orbital.
B. Only 1s and 2s orbitals of carbon may hybridize; each contains electrons to share in bonding.
C. Only 2s and 2p may hybridize; these orbitals contain valence electrons used in bonding.
D. Only 2s orbitals may hybridize; these orbitals contain valence electrons.
E. 1s, 2s, and 2p orbitals all may hybridize; these orbitals are of the same phase
Answer:
C. Only 2s and 2p may hybridize; these orbitals contain valence electrons used in bonding.
Explanation:
Carbon has four valence electrons (2s² 2p²), in several organic compounds it forms four bonds and as this element has two types of orbitals to join, 2s and 2p, it is expected that a compound like methane has two types of C-H bonds, but this is not the case, as all its orbital atoms are the same.
In a process called hybridization, s orbitals and p orbitals are combined in an atom. Depending on the amount of p orbitals that are combined, the hybrid orbitals can be sp (one orbital 2s and one 2p are combined), sp² (the 2s orbital combines with two 2p orbitals) and sp³(the orbital 2s combines with three 2p orbitals).
The carbon atom has the presence of 6 electrons. The valence bond theory hybridized the 2s and 2p orbital for the bonding, as they have valence bonds.
What is valence bond theory?The valence bond theory has been the atomic hybridization of the atoms that results in the formation of the bonds.
The carbon atom has 4 valence electrons present in the bonding valence orbitals. The orbitals combine as sp, sp2, sp3 orbital in order to form the bond.
Thus, since there has been the presence of valence electrons in the s and p orbitals, the 2s and 2p are involved in the hybridization. Hence, option C is correct.
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In a classroom, which comparison would a teacher most likely use for describing a mole?
a cup of water and a liter of oil
a dozen eggs and a dozen jellybeans
a jar of jellybeans and a gram of salt crystals
20 marbles in a bag and 10 large ice cubes
Answer:
B
Explanation:
a mole is "a chemist's dozen" lol
Help??
How many grams of sodium chloride decompose to yield 15 grams of chlorine gas?
2NaCl → 2Na+ Cl2
A- 12.363 9 Naci
B- 49.453 g Naci
C- 30 g NaCl
D- 0.846 g Naci
Answer:
Mass of sodium chloride decomposed = 24.54 g
Explanation:
Given data:
Mass of sodium chloride decomposed = ?
Mass of chlorine gas formed = 15 g
Solution:
Chemical equation:
2NaCl → 2Na + Cl₂
Number of moles of Cl₂:
Number of moles = mass/molar mass
Number of moles = 15 g/ 71 g/mol
Number of moles = 0.21 mol
Now we will compare the moles of Cl₂ with NaCl from balance chemical equation.
Cl₂ : NaCl
1 : 2
0.21 : 2×0.21 = 0.42 mol
Mass of Sodium chloride decompose:
Mass = number of moles × molar mass
Mass = 0.42 mol × 58.44 g/mol
Mass = 24.54 g
what is the molar ratio of h2 to h2o
Answer:
The balanced equation is 2H2 + O2 –> 2 H2O. It takes two hydrogen atoms for every oxygen atom to produce this reaction, so the mole ratio between hydrogen and oxygen is 2:1.
Answer:
2:1
Explanation:
I forgot the explanation of this, but I remembered the answer
what are 4 ways a mineral can form
Answer:
The four main categories of mineral formation are: (1) igneous, or magmatic, in which minerals crystallize from a melt, (2) sedimentary, in which minerals are the result of sedimentation, a process whose raw materials are particles from other rocks that have undergone weathering or erosion, (3) metamorphic, in which new minerals form at the expense of earlier ones owing to the effects of changing—usually increasing—temperature or pressure or both on some existing rock type, and (4) hydrothermal, in which minerals are chemically precipitated from hot solutions within Earth.
The mineral can be formed from volcanic gases, oxidation, crystallization from magma, sediment formation, or deposition from a saline fluid.
What is a mineral?A rock can be described as a collection of minerals. A rock that becomes so hot it melts and many minerals come out in liquids that are hot enough to melt rocks.
Magma can be defined as a melted rock inside Earth, a molten mixture of substances that can be hot to more than 1,000°C. When the magma cools slowly inside the earth, which provides mineral crystals time to grow large enough.
Granite is a rock that produces from slowly cooled magma, consisting of the minerals quartz, plagioclase feldspar which is shiny white, pink potassium feldspar, and black biotite.
When magma will erupt onto the surface of the Earth, it is known as lava. Lava cools more rapidly than magma when it is below the surface and mineral crystals do not have time to form. But the chemical composition remains the same as if the magma cooled slowly.
The mineral can be formed through hydrothermal processes, weathering, and metamorphic and igneous environments.
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How much (mL) of a 2.0 M sodium hydroxide solution would it take to neutralize 50 mL of a 6.0 M solution of hydrochloric acid?
Answer:
150ml
Explanation:
For this question,
NaOH completely dissociates. It is a strong base
HCl also completely dissociates. It is a strong acid
So we have this equation
m1v1 = m2v2 ----> equation 1
M2 = 2m
V1= ??
M2 = 6m
V2 = 50m
When we input these into equation 1, we have:
2m x v1 = 6m x 50ml
V1 = 6m x 50ml/2
V1 = 300/2
V1 = 150ml
Therefore NaOH that is required to neutralize the solution of hydrochloric acid is 150ml.
Thank you
Part C
What is a useful application for this new material?
Answer:
The new material Emily invented allows scratches to be repaired quickly, so it would be useful on cars and other surfaces that experience a lot of wear.
Explanation:
I got this right on Plato\Edmentum
Answer:
The new material Emily invented allows scratches to be repaired quickly, so it would be useful on cars and other surfaces that experience a lot of wear.
Explanation:
a certain quantity of gas occupies 20l at 50°c and pressure of 2 atm.at what pressure will the volume of the gas will be occupy 2L,if the temperature does not change?
Answer:
20atm
Explanation:
according to boyles law P1V1= P2V2
