Explanation:
An atom is the smallest indivisible particle of any substance that takes part in a chemical reaction.
All atoms are identified by the number of protons in them. Protons are the positively charged particles in an atom.
Ions are atoms that have either lost or gained electrons. Therefore, they become charged. Atoms are neutral particles where the number of protons and electrons are the same.Therefore, atoms and ions are similar because the atom and ion of an element have the same number of protons but differs in the number of electrons they carry.
Please Help Meeee.
Best answer will get brainliest.
Answer:Yes I am very good at acid
Explanation:
Answer: I say B
Explanation:
Which of the following correctly shows the word equation for the reaction of aluminum and copper oxide yielding aluminum oxide and copper?
A. aluminum + aluminum oxide → copper + copper oxide
B. aluminum + copper oxide → aluminum oxide + copper
C. aluminum oxide + copper → aluminum oxide + copper
D. copper + aluminum → copper oxide + aluminum oxide
Answer:
The correct answer is B
Explanation:
Educere
aluminium + copper oxide → aluminium oxide + copper. Hence, option B is correct.
What is a word equation?A word equation represents a chemical reaction using the names of the substances involved.
aluminium + copper oxide → aluminium oxide + copper correctly shows the word equation for the reaction of aluminium and copper oxide yielding aluminum oxide and copper.
Hence, option B is correct.
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I need help, and fast, please.
Geologists obtain indirect evidence about Earth’s interior by
a.
measuring pressure differences at Earth’s surface.
b.
estimating temperature inside earth.
c.
directly looking under the many layers.
d.
recording and studying seismic waves.
Answer:
I'm sure it's D.
Explanation:
They obtain evidences by recording and studying seismic waves.
Why is no chemical reaction necessary to extract gold?
Explanation:
Because gold is a very unreactive metal and exists as a pure substance (instead of oxides).
This is actually fun. First comment is brainliest.
Answer:
sup, how ya doin?
Explanation:
5.Are pure solids included in equilibrium expressions? Explain your answer.
Answer:
Pure solids or liquids are excluded from the equilibrium expression because their effective concentrations stay constant throughout the reaction. The concentration of a pure liquid or solid equals its density divided by its molar mass.
Explanation:
Hope this helps!!!
The chemical process in which small organic molecules called monomers bond together to form a chain is called A) production B) polymerization C technology D) modification
Question 4
Calculate the nlass of 7.1 x 1024 formula units of magnesium hydroxide, Mg(OH),.
its me again this is how you find the answer. note: i dont have the periodic table to see the exact atomic mass to find the molar mass however this is the answer:
so the actual formula is Mg(OH) with a 2 as a subscript because there are 2 Mg. so with Mg(OH)2 the Molar mass is 58.32g/mol. 58.32 g/mol x 7.1x1024 = 4.1x1026g
las diferencias fundamentales del entramado urbano antes y despues de 1750
Answer:?
?Explanation:
What do the two arrows in the diagram most likely represent?
O radiation
O photosynthesis
cellular respiration
Oenergy transfers
If an atom has a mass number of 52 and has 28 neutrons, what is the atomic number?
Answer:
24
Explanation:
52-28=24
Question 3
When an electron absorbs energy and jumps it is:
a negative ion
in the ground state
a positive ion
in the excited state
Help please
Answer:
in the excited state
Explanation:
Because in excited state an atom has more energy
why is an atom electrically neutral
Is there currently a cure for HIV
Answer:
No
Explanation:
There are vaccines, to prevent it, made by Dr. Fauci, but no cure
name the process of separating into immiseible liquid?
Answer:
Decantation
Explanation:
Decantation is a process for the separation of mixtures of immiscible liquids or of a liquid and a solid mixture such as a suspension.
Multiple lines between two atoms in a covalent lewis dot diagram mean:
A That there are more atoms involved
B That multiple electrons are shared between the atoms
C That the atoms are not bonded
D That the bond is easier to break
Our digestive enzymes are able to break the alpha linkage in potatoes but not the ?? Linkage in paper
Answer:Beta
Explanation:
I watched the video and I got it wrong, the right answer was beta. I can’t explain why because I’ve already forgotten lol
Digestive tract have digestive enzymes which are not able to break beta linkages as humans do not have enzymes which breakdown beta linkages.
What is digestive tract?
It consists of the gastrointestinal tract along with the accessory organs which are present in digestion process . It involves the breakdown of complex food into smaller components which can be easily assimilated and absorbed by the body.
The digestion process has 3 phases: cephalic phase , gastric phase and intestinal phase.Cephalic phase begins with secretion of gastric juices from gastric glands in response to sight and smell of food.It involves chewing and chemical breakdown of food by the action of digestive enzymes ,saliva in the mouth contain enzymes like lipase and amylase which are secreted by the salivary and serous glands present on the tongue.
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If you help me quickly i will give you 100 point
Answer:
Ovary
Explanation:
The ovaries are organs that lie to the upper right and left of the uterus. They produce, store, and release eggs into the fallopian tubes in the process called ovulation
PLEASE HELP
In the equation 2KCIO3 → 2KC1 + 302, how many moles of oxygen are produced when 3.0 mol of KCIO3 decompose completely?
Moles of Oxygen produced : 4.5 moles
Further explanationA reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products.
The reaction coefficient shows the mole ratio of the reactants and products
Reaction
2KCIO₃ → 2KCl + 30₂
moles of KCIO₃ = 3
From equation, mol ratio of KCIO₃ : O₂ = 2 : 3, so mol O₂ :
[tex]\tt mol~O_2=\dfrac{3}{2}\times 3=4.5[/tex]
How do you convert a temperature from Celsius to kelvin?
Explanation:
by adding 273.15K to the given value of temperature in Celsius degree.
example:
20℃ to Kelvin
[tex]T(K)=20℃+273.15K \\
=293.15K [/tex]
The movement of an object toward earth Soley because of gravity is called
Answer:constant acceleration. A steady change in velocity.
Explanation:
A student measures the time it takes for two reactions to be completed.
Reaction A is completed in 12 seconds, and reaction B is completed in 21
seconds. What can you conclude about the rates of these reactions?
A. The rates of reactions A and B are equal.
B. The rate of reaction A is lower.
C. The rate of reaction B is lower.
Answer:
c
Explanation:
because the left side of reactant is take more time to make a product than the first
The rate of these reactions should be considered as the option b. The rate of reaction A is lower.
Conclusion of the rate of reactions:Since Reaction A is completed in 12 seconds, and reaction B is completed in 21 seconds.
So based on this, we can say that the rate of reaction A should be lower as it contain 12 seconds as compared to reaction b.
hence, the option b is correct.
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This chart shows descriptions of the atoms for four different substances.
Which substance is a solid?
Object 1
Object 2
Object 3
Object 4
In the reaction A + B -> C + D, what are the products?
A. A and B
B. A, B, C, and D
C. C and D
D. A and C
Answer:
C
Explanation:
just took the test
What is the mass of 5.119 102 molecules of copper sulfate
(CuSO4)?
Answer:
Mass = 135.66 ×10⁻²¹ g
Explanation:
Given data:
Number of molecules of CuSO₄= 5.119×10²
Mass of CuSO₄= ?
Solution:
The given problem will solve by using Avogadro number.
1 mole contain 6.022×10²³ molecules
5.119×10² molecules ×1 mol / 6.022×10²³ molecules
0.85×10⁻²¹ mol
Mass in grams:
Mass = number of moles × molar mass
Mass = 0.85×10⁻²¹ mol × 159.6 g/mol
Mass = 135.66 ×10⁻²¹ g
Explain how the rock cycle works.
Be sure to include the name of each type of rock in your description.
(Igneous rock, metamorphic rock, and sedimentary rocks)
How many atoms of Hydrogen are in the 3 molecules of glucose?
3C6H12O6?
Answer:
36 hydrogen atoms in 3 molecules of glucose
Explanation:
The formula for one molecule of glucose is C₆H₁₂O₆
There are 12 hydrogen atoms in one molecule so in three molecules there would be 36
Determine the change in energy when an electron transitions from n= to n=5?
Answer:
ΔE = 13.056 ev
Explanation:
Energy associated with nth state is,
En = -13.6/n²
For n = 1
E₁ = -13.6 / 1²
E₁ = -13.6/1
E₁ = -13.6 ev
Kinetic energy of electron = -E₁ = 13.6 ev
For n = 5
E₅ = -13.6 / 5²
E₅ = -13.6/25
E₅ = -0.544 ev
Kinetic energy of electron = -E₅ = 0.544 ev
Wavelength of radiation emitted:
ΔE = hc/λ = E₅ - E₁
by putting values,
ΔE = -0.544ev - (-13.6 ev )
ΔE = 13.056 ev
14.
How many grams of copper are in 4.6 moles of copper?
Answer:
292.1 kg = 292 100 g
Explanation:
n = m/Mm
Mm(Cu) = 63.5
m = n * Mm
m = 4.6 * 63.5
m = 292.1 kg