In the compound Al2O3, aluminum has an oxidation number of 3, while oxygen's oxidation number is ________.
Answers
Answer:
The oxidation number of Oxygen is -2.
Answer:
-2
Explanation:
I just had that question!
Related Questions
I will need help plz thank you
The Earth's surface is _____ water.
50 %
71 %
97 %
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Answer:
71%
Explanation:
how to calculate the mass of fraction of all elements in calcium carbonate
(CaCO3)
Answers
Answer:
I have made it in above figure hope it helps
How do we view large areas of earth’s surface?
Answers
Answer: Are there options? I think the answer is continents, but I don't really understand the question. Is continents an option?
Explanation:
PLZ HELP!!!!!asapnow
Answers
Answer:
Friction of wind against the ocean surface
How many grams of H2O2 will be produced if 14.86-grams of water is reacted with excess oxygen? How many molecules of H2O2 were produced?
2H2O (l) + O2 (g) ® 2H2O2 (aq)
Answers
Answer:
4.99 ×10²³ molecules
Mass = 28.22 g
Explanation:
Given data:
Mass of H₂O₂ produced = ?
Mass of water react = 14.86 g
Number of molecules of H₂O₂ produced = ?
Solution:
Chemical equation:
2H₂O + O₂ → 2H₂O₂
Number of moles of water:
Number of moles = mass/molar mass
Number of moles = 14.86 g/ 18 g/mol
Number of moles = 0.83 mol
Now we will compare the moles of water and H₂O₂.
H₂O : H₂O₂
2 : 2
0.83 : 0.83
Mass of H₂O₂:
Mass = number of moles × molar mass
Mass = 0.83 mol × 34 g/mol
Mass = 28.22 g
Number of molecules:
1 mole = 6.022×10²³ molecules
0.83 mol × 6.022×10²³ molecules / 1 mol
4.99 ×10²³ molecules
What three traits are used to classify organisms
Answers
hope this answer helps and have a good day
If you have 8.5 moles of water (H2O), how many grams of water do you have?
Answers
Answer: i think it is 144.16
Explanation:
Which of the following characteristics is NOT used to classify organisms into groups?
a.
nucleus or no nucleus
c.
color or no color
b.
autotroph or heterotroph
d.
unicellular or multicellular
Answers
Answer:
b
Explanation:
Give an example of a chemical reaction during which a single substance breaks
down. *
Answers
Answer:
2NaCl(l) => 2Na(s) + Cl₂(g)
Explanation:
Electrolysis of melt NaCl to form sodium (Na) metal and chlorine (Cl₂) gas.
This is a class of reaction called 'Decomposition Rxns'. For what it's worth, there are 6 distinct compound types that undergo breakdown by decomposition. The acronym C O A C H E can help remember them.
C - Carbonates => CaCO₃(s) => CaO + CO₂
O - Oxides of Metals => 2Fe₂O₃(s) => 4Fe°(s) + 3O₂(g)
A - Acids (Oxoacids) => H₂CO₃(aq) => CO₂(g) + H₂O(l)
C - Chlorates, Bromates & Iodates => 2KClO₃(s) => 2KCl(s) + 3O₂(g)
H - Hydroxides => Ca(OH)₂(s) => CaO(s) + H₂O(l)
E - Electrolysis => see above electrolysis of NaCl(l)
Answer:
2NaCl(l) => 2Na(s) + Cl₂(g)
Explanation:
WHAT TWO PLANT CELLS DONT PRODUCE PROTINES?!?!?!?!?
Answers
The cells of plants are eukaryotic. A eukaryotic cell is any cell with a ‘true’ nucleus and organelles. This immediately separates plant cells from the cells of bacteria and archaea.
Animals and fungi also have eukaryotic cells. Plant cells have a unique set of organelles that distinguishes them from the cells of animals and fungi. The presence of organelles called chloroplasts, vacuoles and a cell wall are three key features of the cells of plants.
Plant cells are relatively large and can differ considerably within a plant. There is a large diversity of different types of cells found through stems, leaves and roots.
Different types of plant cells
There is a wide range of cells found in plants. Within the leaves alone there is a variety of cells that perform different functions such as providing protection, photosynthesizing or transporting water. They same level of variety occurs in stems, roots and flowers. Here I describe only a few of the different types of cells from different parts of a plant.
Is this statement an example of an observation or conclusion?
"Country music is the best kind of music."
A.)Observation
B.)Conclusion
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Answer:
Answer:
B.) conclusion
5. Why is it necessary to regularly test the pH of pool
water?
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Answer:
To ensure that everyone enjoys using your pool, it is important to keep the swimming pool pH levels in balance at all times. If the pH is too high, it could cause skin irritation and corrode metal parts on the pool. If the pH is too low, it could create a situation where the chlorine in the pool isn't as effective.
Explanation:
Answer:
I don't see multiple choice, so I'll answer this based on what I have learned on my free time.
Explanation:
Usually, when a ton of Urine is in a pool, it can throw off the Ph balance, and can even damage human eyes. Trust me, it's happened to me one time. my eyes burned like fire.
D. The ¬_____________________ converts food into energy. It is found in both plant cells and animal cells.
Answers
Answer:
I believe it’s the mitochondria
Explanation:
Answer:
Mitochondria
Explanation:
Ik bc i have the vocab for that question
Pls help!!! it’s a timed answer
Answers
Answer:
Explanation
whats your question
What is water (H2O)? Select all that apply * an element a molecule 1 hydrogen and 2 oxygen 2 hydrogen and 1 oxygen
Answers
Answer:
2 hydrogen and 1 oxygen
Explanation:
H2O
Hydrogen has the coefficient so you multiply 1 by 2 and it equals 2
Oxygen does not have any sub or coe so its automatically 1
Describe how an adaptation may have allowed giraffes to survive in savanna ecosystems
Answers
Is your breath becoming visible on a cold day a physical change
Answers
Answer:
no
Explanation:
it is condensation not physical change
jupiter is much more larger than earth , would gravity be weaker or stronger here?
Answers
Answer:
stronger
Explanation:
there is more gravity on Jupiter since it is bigger than earth
In an ionic compound, the negative and positive ions are held together by __________.
Answers
Answer:
the third one
Explanation:
What are the reactants in the reaction? What are their properties? Perform a quick Internet search, if needed.
Answers
The reactants in this reaction are sodium and chlorine. Sodium is a soft, silvery-white metal that is highly reactive. Chlorine is a poisonous greenish-yellow gas that has an odor and combines readily with other elements.
This might be the exact question so you might wanna rephrase it but good luck! :)))
A reactant is a substance that undergoes change during a chemical reaction.
A reaction in a chemical experiment is which takes place when there are mixtures between two or more reactants.
There are about four types of reactions which are:
SynthesisDecompositionSingle replacementDouble replacementPlease note that your question is not complete, therefore, i would give you a general overview to help you.
Some examples of reactants include:
HydrogenSodiumChlorine, etcRead more here:
https://brainly.com/question/12056938
Complete the graphic organizer.
Basic Parts of an Atom
Answers
Answer:
I'm not sure but I think the answer is electrons, protons and neutrons.
Build Carbon (6 red protons, 6 grey neutrons, 6 blue electrons) How many
neutrons could an isotope of carbon have?
A. 5
B. 6
C. 7
Answers
Answer:
B. 6
Explanation:
Isotope given:
¹⁴₆C
In specie written as this;
Superscript = Mass number
Subscript = Atomic number
To find the protons, it is the same as the atomic number;
Protons = Atomic number = 6
Neutrons have no charges;
Neutrons = Mass number - Atomic number =
Neutrons = 14 - 6 = 8
The number of electrons is the same as the atomic number = 6
what are alkenes and there chemical property
Answers
Answer:
Alkenes contain a double bond that is composed of one sigma and one pi bond between two carbon atoms. The sigma bond has similar properties to those found in alkanes , while the pi bond is more reactive. The carbon atoms in the double bond are sp² hybridized , forming a planar structure.
Explanation:
Believe it!!!
Which two compounds are used in batteries?
sulfuric acid and potassium hydroxide
ammonium hydroxide and nitric acid
potassium hydroxide and nitric acid
sulfuric acid and ammonium hydroxide
Answers
Answer:
The chemicals which are electrolytes include: Sodium chloride, chloric acid, nitric acid, potassium nitrate, hydrochloric acid, potassium nitrate, sulfuric acid, sodium hydroxide, magnesium hydroxide and sodium acetate.
Answer:
Sulfuric acid and potassium hydroxide.
Explanation:
These are the two compounds used in car batteries, hope this helps!
You have a particle of length 68 nm. What is this in meters? ( need help asap)
Answers
Answer:
B
Explanation:
Which ones are elements, compounds I’ll give brainliest.
Answers
This biome has extremely cold winters and short, mild summers. It has no trees, only low-growing plants with short root systems because of its frozen soil
called the permafrost. It is covered by snow for most of the year. Animals that live here must have wide paws or hooves to walk through the frozen mushy.
soil. This biome is known as the_________
A. Tropical rainforest
B. Taiga
C. Deciduous Forest
D. Desert
E. Grassland
F. Tundra
Answers
Why the microscope is made an inclination joint?
Answers
Answer:
inclination joint This is the joint between the pillar and the arm of the microscope. It is used to tilt the body tube and stage. It is usually best to keep the stage horizontal.
Explanation:
The head of a hammer is often made of steel. This makes the head heavy, which helps create a strong force for driving nails. Steel is also strong. The head of a hammer must be strong to resist what force?
A The force of the air resistance on the moving hammer
B The force of the person using the hammer
C The force of gravity pulling down on the hammer
D The force of the nail pushing in the opposite direction
Answers
Answer:
A
Explanation:
In simple terms: Hammer goes one way, air goes the other way.
Answer:
d
Explanation:
i took the test
How many carbon atoms are represented by the model below?
Answers
Answer:
3
Explanation: