can electricity and light bring about reversible and irreversible changes ? Give examples
Answer:
yes
Explanation:
Yes, electricity and light can bring reversible and irreversible changes. Light : Reversible change - The light illuminate it's surrounding's environment which is reversible when we turn off the source of the light. ... And,this reaction is an irreversible change
why is it true that particles in a rock lying on the group have kinetic energy and energy
Answer:
Particles of objects have both kinetic and potential energy. Because particles are constantly in motion, they have kinetic energy. These particles are arranged in specific ways in different objects. Therefore, they also have potential energy.
Explanation:
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2. zinc (III) chlorate →
Answer:
27
Explanation:
One main difference between a Prokaryotic cell and an Eukaryotic cells is __________.
Question 3 options:
Prokaryotic cells have many organelles
The Eukaryotic Cell has a nucleus
The Prokaryotic cells have a cell wall
The Eukaryotic cell is the only cell with DNA
Answer:
The Eukaryotic cell has a nucleus
Explanation:
Prokaryotic cells lack a nucleus and membrane-bound structures. Eukaryotic cells have a nucleus and membrane-bound structures called organelles.
Need help!!!
Will give brainliest for answer
Give oxidation and reduction half-reactions to the equation provided
Explanation:
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Need help ASAP. Gave only 10 min
Answer:
Explanation:
If it interests you, you could check out Maxwell's demon. If he is not in operation (and he likely isn't), then the answer is D.
Heat always transfers from hot to cold -- at least at beginning levels of chemistry.
Which of the following is a compound?
Group of answer choices
Nitrogen
Oxygen
Hydrogen
Carbon Dioxide
Answer:
carbon dioxide
it is made up of carbon and oxygen.
What type of reaction is Ni + MgSo4
HELP ASAP WILL MARK BRAINLIEST!!!
Answer:
22.4/3.8=5.89
Explanation:
When any salt is dissolved in water, the ionic bonds between the atoms must be broken in order for the salt to dissolve. The energy
stored up in these bonds then must be
A) convert into light
B) stored in the water
C) released to the environment
D) converted into mechanical energy
Answer:
C released to the environment
Explanation:
I just did it in class
I need to turn this in a 3:00 sharp
Answer:
i think their is amswer key for that
Explanation:
How many atoms are in 2.00 x 10^-7 moles of Helium
Answer:
1.20 10^17
Explanation:
convert to atoms using Avogadro's number
2.00 x 10^-7 moles * 6.022 X 10^23 atoms= 1.20 10^17
Come up with another way to separate certain mixture?
Answer:
Oil
Explanation:
How many moles of glucose does 1.2 x 10^24 molecules represent
2.0 mol C₆H₁₂O₆
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Stoichiometry
Using Dimensional AnalysisExplanation:Step 1: Define
1.2 × 10²⁴ molecules C₆H₁₂O₆ (glucose)
Step 2: Identify Conversions
Avogadro's Number
Step 3: Convert
Set up: [tex]\displaystyle 1.2 \cdot 10^{24} \ molecules \ C_6H_{12}O_6(\frac{1 \ mol \ C_6H_{12}O_6}{6.022 \cdot 10^{23} \ molecules \ C_6H_{12}O_6})[/tex]Divide: [tex]\displaystyle 1.99269 \ mol \ C_6H_{12}O_6[/tex]Step 4: Check
Follow sig fig rules and round. We are given 2 sig figs.
1.99269 mol C₆H₁₂O₆ ≈ 2.0 mol C₆H₁₂O₆
please help due soon!
Answer:
W X Z Y. It is the strongest to the least
What is the difference between reactants and products?
Answer:
The reactants are the substances that start the chemical reaction. The products are the substances that are produced in the chemical reaction.
Explanation:
What is the difference between reactants and products?
Answer:Reactants It is a substance that is present at the start of a chemical reaction.The substance(s) to the left of the arrow in a chemical equation. Products It is a substance that is present at the end of a chemical reaction.The substance(s) to the right of the arrow. #CARRYONLEARNING #STUDYWELLWhat is the mass of 5.26 mol Fe2(SO4)3?
Answer in units of g.
2100 g Fe₂(SO₄)₃
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Stoichiometry
Using Dimensional AnalysisAtomic Structure
Reading a Periodic TableExplanation:Step 1: Define
5.26 mol Fe₂(SO₄)₃
Step 2: Identify Conversions
Molar Mass of Fe - 55.85 g/mol
Molar Mass of S - 32.07 g/mol
Molar Mass of O - 16.00 g/mol
Molar Mass of Fe₂(SO₄)₃ - 2(55.85) + 3(32.07) + 12(16.00) = 399.91 g/mol
Step 3: Convert
Set up: [tex]\displaystyle 5.26 \ mol \ Fe_2(SO_4)_3(\frac{399.91 \ g \ Fe_2(SO_4)_3}{1 \ mol \ Fe_2(SO_4)_3})[/tex]Multiply/Divide: [tex]\displaystyle 2103.53 \ g \ Fe_2(SO_4)_3[/tex]Step 4: Check
Follow sig fig rules and round. We are given 3 sig figs.
2103.53 g Fe₂(SO₄)₃ ≈ 2100 g Fe₂(SO₄)₃
1. By means of orbital diagrams, write down the
electronic configurations of these elements.
(a) Sodium
(e) Magnesium
(b) Aluminium (f) Silicon
(c) Phosphorus (g) Sulphur
(d) Chlorine
(h) Argon
Answer:
a) 1s22s22p63s1
b) 3s² 3p¹
c) 1s22s22p63s23p3
d) 3s² 3p⁵
e) 3s2
f) 1s22s22p63s23p2
g) 1s22s22p63s23p4
h) 3s² 3p⁶
What is the chemical formula for carbon fibre? (specifically if possible)
Answer: 90% Polyacrylonitrile (PAN)
(C3H3N)n - n signifies the chain
10% Rayon & Pitch Base
Explanation:
Just Because...
a measuring cylinder cannot be used to measure the volume of regular shaped solids true or fakse
Answer:
False
Explanation:
The statement is false because the volume of an irregular object can either be measured by the use of a measuring cylinder or an overflowing jar. That's the standard method of measuring irregular objects volume.
I need help with this
Answer: B
Explanation: All you have to do to find out if an equation is balanced is count the number of atoms on each side. To be balanced, they must be equal.
In case you didn’t know: The number in front of an element or compound means that you will multiply. For instance, 2AlBr3 would have 2 Al atoms and 6 Br atoms. The subscript number just means how many atoms there are in that compound.
3 points
44. Name one similarity and one difference between compounds and
homogeneous mixtures.
Your answer
Hey there!
Elements and compounds are purely homogeneous substances and they have a constant composition throughout. Elements and compounds cannot be separated into their respective constituents by physical means. Compounds and mixtures are made up of different elements or different atoms.
Which atom has the largest atomic radius? *
K
Fr
Cs
Rb
Which of the following properties is responsible for the movement of tectonic
plates?
Temperature of oceanic crust
Thickness of Earth's layers
Density of continental crust
Convection currents in the asthenosphere
Which reason best explains why plasmas are good conductors of electricity? They have mobile charged particles. They are at extremely high temperatures. They are made up of particles in fixed positions. They have slow-moving nuclei that carry electricity.
Answer:
They have mobile charged particles.
Explanation:
Plasma refers to very hot matter such that the electrons in matter are ripped away from the atoms leading to the formation of an ionized gas.
We know that the carriers of electricity are charged particles. Any state of matter that has an abundance of charge carriers will definitely be a good conductor of electricity.
Therefore, plasmas are good conductors of electricity because they have a lot of mobile charged particles.
Consider the model of the nitrogen atom .
Which electron configuration matches this model?
Answer:
The atomic number of Nitrogen is seven. So it contains seven protons and seven electrons in neutral form. Also, the electronic configuration cited above contains seven electrons among which two electrons are present in first shell and five electrons are present in valence shell respectively.
Explanation:
HELLPPPPP! The students were making zinc, Zn by reacting copper, Cu, with zinc nitrate, Zn(NO3)2. They were expecting to produce 5.63 g of copper but they recovered only 5.1 g copper. Calculate the percent yield
Answer:
[tex]5.1 \div 5.63[/tex]
How could you increase the atomic number?
Answer:
So the atomic number increases with each element. The atomic mass is the sum of the protons and neutrons. As the atomic number increases it causes an increase in the atomic mass. However sometimes there is not a corresponding increase in the number of neutrons...
Explanation:
:)) good luck!!!
Ca2+ is an example of
a. cation
b.anion
c.ionic bond
d. ionic compound
This is urgent please help...
Write a balanced equation for this reaction.
___ C2H2 + ___ O2 ---> ___ CO2 + ___ H2O
Please help
Answer:
2C2H2+5O2--->4CO2+2H2O
Explanation:
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