Answer:
Compound: A substance that is made up of more than one type of atom bonded together.
Mixture: A combination of two or more elements or compounds which have not reacted to bond together; each part in the mixture retains its own properties.
Explanation:
The different substances in a mixture are not chemically combined, whereas the different elements in a compound are. The atoms do not combine in the mixture, but they combine when they form a compound.
Which statement best explains how electrons form a covalent bond in a molecule?
A.
A pair of electrons splits so that each atom gets one electron.
B.
A pair of electrons belongs to two atoms at the same time.
C.
A pair of electrons is transferred from one atom to another atom.
D.
A pair of electrons moves from a lower energy level to a higher energy level.
E.
A pair of electrons drifts freely from one molecule to another.
How do you find the amount of moles is .032 grams of water and whats the answer
Answer:
[tex]\boxed {\boxed {\sf 0.0018 \ mol \ H_2 O }}[/tex]
Explanation:
First, we need to find the molecular mass of water (H₂O).
H₂O has:
2 Hydrogen atoms (subscript of 2) 1 Oxygen atom (implied subscript of 1)Use the Periodic Table to find the mass of hydrogen and oxygen. Then, multiply by the number of atoms of the element.
Hydrogen: 1.0079 g/mol Oxygen: 15.9994 g/molThere are 2 hydrogen atoms, so multiply the mass by 2.
2 Hydrogen: (1.0079 g/mol)(2)= 2.0158 g/molNow, find the mass of H₂O. Add the mass of 2 hydrogen atoms and 1 oxygen atom.
2.0158 g/mol + 15.9994 g/mol = 18.0152 g/molNext, find the amount of moles using the molecular mass we just calculated. Set up a ratio.
[tex]0.032 \ g \ H_2 O* \frac{ 1 \ mol \ H_2 O}{18.0152 \ g \ H_2 O}[/tex]
Multiply. The grams of H₂O will cancel out.
[tex]0.032 * \frac{1 \ mol \ H_2 O}{18.0152 }[/tex]
[tex]\frac{0.032 *1 \ mol \ H_2 O}{18.0152 }[/tex]
[tex]0.00177627781 \ mol \ H_2 O[/tex]
The original measurement given had two significant figures (3,2). We must round to have 2 significant figures. All the zeroes before the 1 are not significant. So, round to the ten thousandth.
The 7 in the hundred thousandth place tells us to round up.
[tex]0.0018 \ mol \ H_2 O[/tex]
There are about 0.0018 moles in 0.032 grams.
5. Which is NOT true about mixtures?
A. Mixtures are physical combination of only one substance.
B. Mixtures can be homogeneous and heterogeneous.
C. Mixtures are physical combination of two or more substance.
D. Mixtures can be separated in different processes.
The predicted tidal range along an East Coast shoreline is feet. How much should a fisherman expect the tide to rise during the first hour?
A.2 feet
B.1 foot
C.0.5 feet
D 0.8 feet
Answer:
b. 1foot
Explanation:
im not that sure but hope this helps !! happy holidays!!
How dose nuclear energy can be transform form one form to another form
Explanation:
Nuclear energy is found in the nucleus of an atom holding nuclear materials in place.
When a nuclear decay or fusion occurs, the energy is released.
Most times, the nuclear energy is transformed into heat energy. The heat energy is used to do other forms of work that converts energy from one form to another. It can be converted to mechanical energy when water is boiled and used to drive turbines. It can be used in heating chambers. this and many more can lead to energy transformationIs silver a metal or non-metal
Answer:
metal
Explanation:
Three quantum numbers are derived from Schrodinger’s equation that describe the probability of finding an electron around a nucleus: the principal quantum number, the angular momentum quantum number, and the magnetic quantum number. Explain each quantum number, including associated shapes, numbers, letters and values.
(please help)
Answer:
Principal Quantum Number (n) = energy level (1s2)
Angular Momentum Quantum Number (l) = sub-shell (1s2)
Magnetic Quantum Number (mi) = specific orbital electron occupies
range of (n) = 1-7
range of (I) = s, p, d , f
Explanation:
Answer:
Principal Quantum Number: designates the principal electron shell. Angular Momentum Quantum Number-This quantum number determines it's shape of an orbital and thus it's angular distribution. This quantum number determines the number of orbital numbers, their orientation within the sub-shell.
Principal Quantum Number, n
It describes the size of its orbital and of the main energy level. It is represented by n. Where, n = 1,2,3,4....stands for K, L, M, N shell and so on..
ngular Momentum Quantum Number l
It describes the shape of the orbital and thus the angular distribution. It can take from 0 to (n - 1). That is l = 0,1,2,...,(n - 1)
The magnetic Quantum Number, m
It describes the orientation of the orbitals. It is represented as . The value of this quantum number ranges from . When l = 2, the value of will be -2, -1, 0, +1, +2.
Explanation:
The formation of an ionic compound involves the transfer of electrons. The removal of one or more electrons from a metal is a process that _____ energy, whereas the addition of one or more electrons to a nonmetal _____ energy.
Answer:
Absorbs, Releases
Explanation:
The formation of an ionic compound involves the transfer of electrons. The removal of one or more electrons from a metal is a process that absorbs energy, whereas the addition of one or more electrons to a nonmetal releases energy.
Answer:
Absorbs
Release
Explanation:
The formation of ionic compounds occurs between two kinds of atoms having a large electronegativity difference (Δx ≥ 0.7) e.g metals (like those in group IA and IIA) and non-metals(like those in groups VIA and VIIA). The formation of an ionic bond involves the transfer of electron(s) from the less electronegative atom (metal) to the more electronegative atom (non-metal) such that the two kinds of atoms now have a completely filled outer shell like the noble gas.
what major gases are absorb by the ocean
A) oxygen and nitrogen
B) oxygen and hydrogen
C) carbon dioxide and hydrogen
D) oxygen and carbon dioxide
Answer:
C) carbon dioxide and hydrigen
Need help with this.
Answer:
18.2 g.
Explanation:
You need to first figure out how many moles of nitrogen gas and hydrogen (gas) you have. To do this, use the molar masses of nitrogen gas and hydrogen (gas) on the periodic table. You get the following:
0.535 g. N2 and 1.984 g. H2
Then find out which reactant is the limiting one. In this case, it's N2. The amount of ammonia, then, that would be produced is 2 times the amount of moles of N2. This gives you 1.07 mol, approximately. Then multiply this by the molar mass of ammonia to find your answer of 18.2 g.
A gas us a pressure of 800 kPa at 327 degree C. What will be its pressure at 27 degree C, if the volume does not change?
A. 400 kPa
B. 1,600 kPa
C. 668 kPa
D. 958 kPa
Answer:
Ooo gas laws! fun! the answer is B, 1600 kPa
Explanation:
Here are some key things to remember:
- to convert Celsius to Kelvin add 273
- we are using the equation [tex]P1 x T1 = P2 x T2[/tex] our given variables:P1=800kPa T1= 327 + 273 = 600 KP2= ? (decrease)T2= 27+ 273 = 300 K- rearrange our equation and plug in the numbers to solve.[tex]P2= \frac{P1 x T1}{T2}[/tex][tex]800 kPa = \frac{600 K}{300 K}[/tex]- Our Kelvin cancels out so that leaves us with the measurment of kPa. When the numbers are solved out, you get 1600 kPaComo se consiguió el interior de un atomo
Answer:
A través del Experimento de Rutherford.
Explanation:
El experimento de la lámina de oro fue realizado en 1909 por Ernest Marsden y Hans Geiger bajo el liderazgo de Ernest Rutherford. En este experimento, se bombardeó una lámina de oro con partículas alfa y se detectó su dispersión. Se encontró que una pequeña proporción de las partículas regresan cerca de la fuente. Estos resultados fueron la base para el lanzamiento de un nuevo modelo atómico con un núcleo central cargado positivamente y con electrones cargados negativamente con pequeñas masas en relación con el núcleo y distribuidos a su alrededor.
Whats the answer marking brainliest :-)
Answer:
A
Explanation:
hope this helps you have a good day
HELP!!!!!! 20 POINTS
step 2 on the performance task thing.
C) Judge the closeness of your trend line to the data points. Do you notice a relationship between the data points? (2 points)
D) Is the trend line linear? If so, write a linear equation that represents the trend line. Show your work.
I believe that the answer is C
(20 POINTS!!) please help me write a short reference page on chemical bonds (anything helps)
•differentiate the characteristics of ionic and covalent bonds
•summarize the steps and rules for naming IONIC and COVALENT bonds
•describe the role an elements charge has in writing and naming bonds
- how do roman numerals change the process of naming ionic compounds
have a good day :)
Explanation:An ionic bond essentially donates an electron to the other atom participating in the bond, while electrons in a covalent bond are shared equally between the atoms. The only pure covalent bonds occur between identical atoms. ... Ionic bonds form between a metal and a nonmetal. Covalent bonds form between two nonmetals.
What is the equilibrium constant of a reaction?
A. It is the ratio of the concentrations of products to the concentrations of reactants.
B. It is the ratio of the number of moles of products to the number of moles of reactants. C. It is the concentrations of products multiplied by the concentrations of reactants.
D. It is the number of moles of reactants subtracted from the number of moles of products.
Answer:
A. It is the ratio of the concentrations of products to the concentrations of reactants.
Explanation:
The equilibrium constant of a chemical reaction is the ratio of the concentration of products to the concentration of reactants.
This equilibrium constant can be expressed in many different formats.
For any system, the molar concentration of all the species on the right side are related to the molar concentrations of those on the left side by the equilibrium constant. The equilibrium constant is a constant at a given temperature and it is temperature dependent. The derivation of the equilibrium constant is based on the law of mass action. It states that "the rate of a chemical reaction is proportional to the product of the concentration of the reacting substances. "Answer: A
Explanation:
a p e x
Which of the following elements is most reactive.
A Chlorine
B Bromine
C Fluorine
D Helium
Answer:
c.
Fluorine
Explanation:
MARKING BRAINLIEST!
plant or animal and to explain the reasoning for their conclusion. What is the correct response?
The cell is an animal cell because it has a cell membrane and no cell wall. Cell walls are unique to plant cells.
The cell is a plant cell because it has cytoplasm, which helps the plant make their own food from sunlight.
The cell is a plant cell because it has chloroplast, which helps the plant make its own food from sunlight.
The cell is an animal cell because it has chloroplast used for making useable energy.
Answer:c is correct
Explanation:
Is the following compound an alcohol, aldehyde, or organic acid?
C-C=0
Answer:
Explain both aldehydes and ketones, the geometry around the carbon atom in the carbonyl group is trigon planar; the carbon atom exhibits sp2 hybridization. Two of the sp2 orbitals on the carbon atom in the carbonyl group are used to form σ bonds to the other carbon or hydrogen atoms in a molecule. The remaining sp2 hybrid orbital forms a σ bond to the oxygen atom. The hybridized p orbital on the carbon atom in the carbonyl group overlaps a p orbital on the oxygen atom to form the π bond in the double bond.ation .
How many grams of barium hydroxide are required to dissolve in 156 g of water to make a 0.247 m solution?
Molar mass of Ba(OH)2: 171.346
Explanation:
Moles of Barium hydroxide = 0.156dm³ * (0.247mol/dm³) = 0.0385mol.
Mass of Barium hydroxide = 0.0385mol * (171.346g/mol) = 6.60g.
Answer:
6.60
Explanation:
6. A solution of CuSO4 is electrolyzed for 10 minutes with a current of 1.5 amperes. What is the mass of copper deposited at the cathode? ( F =96,500C,Charge of Cu in CuSO4 = +2)
The mass of Copper deposited at the cathode : 0.296 g
Further explanationGiven
time = t = 10 min=600 s
current = i = 1.5 A
F = 96500 C
charge Cu=+2
Required
The mass of Copper
Solution
Faraday's Law
[tex]\tt W=\dfrac{e.i.t}{96500}[/tex]
e = Ar/valence(valence Cu=2, Ar=63.5 g/mol)
Input the value :
[tex]\tt W=\dfrac{63.5/2\times 1.5\times 600}{96500}\\\\W=0.296~g[/tex]
What is the law of conservation of energy? a. Energy is created and destroyed. b. Energy is not created but is destroyed. c. Energy is created but not destroyed. d. Energy is neither created nor destroyed pls help
Answer:
Energy is neither created nor destroyed.
Explanation:
The law of conservation of energy states that energy can neither be created nor be destroyed. The total energy of an isolated system remains conserved. It never gets 0. It changes from one form of energy to other but never vanishes.
Hence, the correct option is (d) "Energy is neither created nor destroyed"
How does kinetic energy relate to particles and the states of matter?
Help??
Answer:
The kinetic molecular theory of matter states that: Matter is made up of particles that are constantly moving. Molecules in the solid phase have the least amount of energy, while gas particles have the greatest amount of energy. The temperature of a substance is a measure of the average kinetic energy of the particles.
Explanation:
Hope this helps. Happy Holidays!!!!
What is the electron structure of sodium?
Answer:
2,8,1
Explanation: This is the number of electrons sodium has on each electron shell
Which sentence is a scientific statement?
A.
There is a substance around us that cannot be detected.
B.
Kids should go to school for 12 years.
C.
Experimentation is the best way to obtain knowledge.
D.
Unicorns once existed on Earth.
E.
There are no living things on the Moon.
B. Kids should go to school for 12 years.
What is a scientific statement?Scientific statements are those statements that must be falsifiable which means that able to be proven false while on the other hand, tautology is a statement that is true. The sun revolves around the earth” is an example of scientific statement because this statement can be falsifiable in the light of evidences and researches. Hypothesis is a statement that may be true or false. We can verify it by doing experiments.
So we can conclude that option B is the sentence that represents a scientific statement.
Learn more about scientific here: https://brainly.com/question/17216882
#SPJ1
A(n)
is a group of organs that work together to perform a cormmon function.
cell
tissue
organ
organ system
Thermal energy always transfers from a Fill in the blank text field 1 Type your answer here. object to a Fill in the blank text field 2 Type your answer here. object. The transfer of this energy, called heat, is measured in Fill in the blank text field 3 Type your answer here. .
Explanation:
Thermal energy is the transfer of energy from one object to another as a result of difference in their temperature. The direction of the transfer is from a hot body (higher temperature) to a cold body (lower temperature).
The transfer of this type of energy called heat is measured in joules,
PLEASE HELP PLEASEEE JUST 1 QUESTION
The answer i got was C so I would pick C
Plants appear green because the chlorophyll reflects green light from the sun.
True
False
Answer: that should be true if not look it up :)
Explanation:
Which transformations in the rock cycle require heat? Select all that apply.
Igneous rock to metamorphic rock
Metamorphic rock to sedimentary rock
Metamorphic rock to igneous rock
Sedimentary rock to metamorphic rock
Igneous rock to sedimentary rock
Answer:
Igneous rock to metamorphic rock
Metamorphic rock to igneous rock
Sedimentary rock to metamorphic rock
Explanation:
In changing a rock through the listed processes heat is highly required.
Transformation from a rock to igneous rocks requires the most heat because the rock body must be molten.
Igneous rock to metamorphic rock is a metamorphic change that requires significant heat and pressure. The mineralogical fabric is affected by this change. In moving from metamorphic to igneous rock, the melting temperature of a rock must be attained in order for magma to form. Sedimentary changes to metamorphic rocks also require heat.