Answer:
Explanation:
The law of conservation of mass states that matter cannot be created or destroyed in a chemical reaction. For example, when wood burns, the mass of the soot, ashes, and gases, equals the original mass of the charcoal and the oxygen when it first reacted.
Balance this equation pls
__NaCl + __CaF2→ __NaF +__CaCl2
Answer:
2NaCl + 1CaF²--------》2NaF + 1CaCl²
Answer:
2NaCl + CaF2 >>> 2NaF + CaCl2
What two things determine the gravity of an object?
A. mass & distance
B. mass & weight
C. density & mass
D. distance & weight
Answer:
A mass and distance
Explanation:
Help!!!!!!!!!!!!!!!!!!
The density of the sample : 0.827 g/L
Further explanationIn general, the gas equation can be written
[tex]\large {\boxed {\bold {PV = nRT}}}[/tex]
where
P = pressure, atm , N/m²
V = volume, liter
n = number of moles
R = gas constant = 0.082 l.atm / mol K (P= atm, v= liter),or 8,314 J/mol K (P=Pa or N/m2, v= m³)
T = temperature, Kelvin
n= 1 mol
MW Neon = 20,1797 g/mol
mass of Neon :
[tex]\tt mass=mol\times MW\\\\mass=1\times 20,1797 =20.1797~g[/tex]
The density of the sample :
[tex]\tt \rho=\dfrac{m}{V}\\\\\rho=\dfrac{20,1797}{24.4}=0.827~g/L[/tex]
or We can use the ideal gas formula ta find density :
[tex]\tt \rho=\dfrac{P\times MW}{RT}\\\\\rho=\dfrac{1\times 20.1797}{0.082\times 298}\\\\\rho=0.826~g/L[/tex]
Which of the following is an example of a decomposition reaction?
Answer:
B is a decomposition reaction
The chemical equation which represents decomposition reaction is 2 NaCl[tex]\rightarrow[/tex] 2 Na + Cl₂.
What is chemical equation?Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.
A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .
The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.
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What will a medium mass star become at the very end of its life cycle
Electric circuit are a pathway for ____ to flow
A.) Neutrons
B.) Protons
C.) Matter
D.) Electrons
Answer:
Electrons
Explanation:
The source that gives the voltage (force) causes the electrons to move.
Answer:
The answer is Electron
Explanation:
What is a way in which nuclear fusion is used?
O Space stations
O atomic bombs
O Nuclear power plants
O In stars
In the following reaction, which element or compound is the oxidizing agent?
I NEED HELP ASAP
Answer:
[tex]O_{2}[/tex] is the oxidizing agent
Explanation:
An oxidizing agent is an element in a reaction that accepts the electrons of another element. It is typically hydrogen, oxide, or any halogen. In this case, it is oxygen. The answer is 02.
Answer:
i think it's 02 i might be wrongExplanation:
1. All ___matter______ is made of atoms that cannot be ______________________ or ____________________. 2. All _______________ of a given __________________ are ___________________ in mass and __________________.
Answer:
All the matter that is made of atoms that cannot be broken or beaten into thin sheet .2All matters of a given book are in mass and mixture
EASY QUESTION!!!! 12 POINTS!!!
Neutron____Neutron
push apart
pull together
Answer:
Neutron pull together Neutron
How many more valence electrons does this atom need to fulfill the Octet
Rule? (Urgent need help)
Answer: The octet rule is a bonding theory used to predict the molecular structure of covalently bonded molecules. According to the rule, atoms seek to have eight electrons in their outer—or valence—electron shells. Each atom will share, gain, or lose electrons to fill these outer electron shells with exactly eight electrons.
Explanation:
plsss help
will mark BRAINLIEST
Answer:
c
Explanation: just a chemachal
How does the quantum theory of atoms explain the nature of the emission-line spectrum of hydrogen?
Energy takes on discreet values, we notice that only certain values of energy are allowed hence the line spectrum of the hydrogen atom.
According to the Bohr model of the atom, energy levels within the atom is quantized. Energy quantization implies that energy occurs in discreet packets and do not take on intermediate values.
Because energy takes on discreet values, we notice that only certain values of energy are allowed hence the line spectrum of the hydrogen atom.
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Which one is not acid? Na₂O or CO₂
Answer:
It is Na2O because it doesn't show any acidic properties.
Ok ok I know this isn’t about schoolwork but can ppl please comment how to ask a boy out?
Answer:
depends on the boy but don't try to hard be cool and just go for it 90 percent of the time they'll say yes
Explanation:
When an egg is boiled in a pot of water on the stove, there is more than one kind of heat transfer. Heat is transferred from the stove to the pot directly since they are physically touching. Heat is also transferred from the pot to the egg, carried through the water.
Answer:
Stove → Pot = conduction, Pot → Egg = convection.
Explanation:
There are three ways in which heat is being transferred from one medium to the other and the means are; radiation, conduction and convection heat transfer.
Radiation is the process in which heat is being transferred through emission in form of electromagnetism. Conduction heat transfer Is the process in which heat is being transferred through contact that is two bodies touching each other. Convection heat transfer is the kind of heat that happens through gases.
Since the heat from the stove touching the pot is the conduction heat transfer.
After the water has been heated up, the gas from the water makes the convection heat transfer.
Using the model,what is the mass of the atom pictured?
A)3amu
B)5amu
C)7amu
D)9amu
Answer:
with 20 protons (p=20) and 22 neutrons (n=22)? 47 ... Listed below are the charges and masses of four ... a) +2,2 amu c ) +1, 1 amu least b) ... pudding” Model.
Explanation:
Answer:
7amu
Explanation:
Atoms are composed of three particles. The proton, neutron, and electron.
The mass of the atom in amu is just the number of protons and neutrons in the nucleolus since they both have a mass of about 1 amu. Electrons are not counted since they have an incredibly small mass that ultimately does not matter.
This atom has 3 protons (positively charged particle) and 4 neutrons (particle with no charge) which together gives a mass of 7 amu.
What is the correct name for the following compound? "Make sure you are using correct naming
rules"
Answer:
c
Good luck on your assessment!
when hydrogen atom absorbs a photon, and an electron moves level 1 to level 2, what happens to the energy of the atom?
Answer:
When an electron is hit by a photon of light, it absorbs the quanta of energy the photon was carrying and moves to a higher energy state. One way of thinking about this higher energy state is to imagine that the electron is now moving faster, (it has just been "hit" by a rapidly moving photon).
Explanation: pls mark brainliest :))
Which option listed above represents the correct way the layers would form? Explain
your choice by describing which chemical or physical property determines the
layering.
Answer:
option 1 pls mark bbrainliest
Which of the following is NOT a physical property?
A. melting point
B. state of matter
C. density
D. flammability
Answer:
i think.its D ddddddddddddd
A solution is made by dissolving 0.0503 kg of biphenyl (C12H10) in
350.0 mL of benzene (C6H6).
What would be the osmotic pressure (in atm) of this solution at 40.0
°C? (The density of benzene is 0.877 g/mL.)
Answer:
Letter A po
Explanation:
yanffdddddd
MULTIPLE CHOICE QUESTION URGENT URGENT URGENT PLS HELP ME
Answer:
The answer is 4
Explanation:
plz give me brainliest :)
AR
1. The table below lists some properties of a sample of lauric acid.
Property
Value
hf
Volume
hc
2
Mass
Boiling point
79.6 ml
70.022 g
222°C
Number of
moles
0.350
RT
Which of these is an intensive property of this sample?
Answer:
Boiling point
Explanation:
We define extensive properties as those properties that change with the amount of the substance present. These include; mass, weight, and volume.
Intensive properties, on the other hand, do not change with the amount of the substance present. They are characteristic of the substance. They include; color, melting point, boiling point, electrical conductivity, and physical state at a given temperature.
What is the primary result of a fission
reaction?
(1) conversion of mass to energy
(2) conversion of energy to mass
(3) binding together of two heavy nuclei
(4) binding together of two light nuclei
Answer:
(1) conversion of mass to energy
Explanation:
Nuclear fission: In nuclear fission, an unstable atom splits into two or more smaller pieces that are more stable, and releases energy in the process. The fission process also releases extra neutrons, which can then split additional atoms, resulting in a chain reaction that releases a lot of energy.
The primary result of a nuclear fission reaction is the conversion of energy to mass.
What is nuclear fission reaction?Nuclear fission reaction is a reaction in which the nucleus of an atom splits into two or more smaller nuclei. The nuclear fission reaction produces gamma photons and releases a very large amount of energy even by the energetic standards of radioactive decay.Hence, option 2 is the answer.
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Which element in Period 3 has the largest atomic radius?
Answer:
sodium
Explanation:
What are ionic compounds
Which best explains the difference between a monomer and a polymer?
A monomer is larger than a polymer.
A monomer contains carbon and a polymer does not.
A polymer contains carbon and a monomer does not.
A polymer is larger than a monomer.
The difference between the monomer and a polymer should be that monomer should be larger than a polymer.
Difference of monomer and a polymer?The monomer represent the molecule type where it has the capability for chemically the bond along with the other molecules with respect to the long chain. While the polymer should represent the chain of the non-specified the no of monomers.
Also, it represent the building blocks of polymers that contain more complex type of molecules
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Answer:
A
Explanation:
Identify the number of protons and electrons
in fluorine and iodine.
The element fluorine helps prevent tooth decay and is found in many toothpastes,
Atomic number: 9
Answer:
Fluorine has 9 protons and 9 electrons
Iodine has 53 protons and 53 electrons
Explanation:
Fluorine has 9 protons and 9 electrons and Iodine has 53 protons and 53 electrons.
What is an electron?An electron is defined as a subatomic particle which is charged negatively either bound to an atom or not it means they are freely found. The nucleus of an atom is made up of electron, proton and neutron. The electron is a basic particle and electron is not made of anything.
The nature of electron is free it means they are present freely in nature and an atom consist of electron.The main function of electron is that function of negatively- charged component of an atom.
The electrons are primary function of current conducting and electrons number as well as atomic number of an element is always same or equal. There is no size of electron but the mass of electron is 9×10^-31.
Therefore, Fluorine has 9 protons and 9 electrons and Iodine has 53 protons and 53 electrons.
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if you had 15 moles of Oxygen (O2), how many moles of water (H2O) would you be able to make?
Answer:
30 moles of water will produced.
Explanation:
Given data:
Number of moles of O₂ react = 15 mol
Number of moles of water formed = ?
Solution:
Chemical equation:
2H₂ + O₂ → 2H₂O
Now we will compare the moles of water with oxygen.
O₂ : H₂O
1 : 2
15 : 2×15 = 30 mol
30 moles of water will produced.