Answer:
1435
Explanation:
i did the math and this is what i got i think its right but i dont know
What is the theoretical yield of oxygen when 29.2 g of water are decomposed by electrolysis according to the balanced equation: 2H2O yields 2H2 + O2
Taking into account the reaction stoichiometry, the theoretical yield of oxygen when 29.2 g of water are decomposed by electrolysis is 25.956 grams.
Reaction stoichiometryIn first place, the balanced reaction is:
2 H₂O → 2 H₂ + O₂
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
H₂O: 2 molesH₂: 2 molesO₂: 1 moleThe molar mass of the compounds is:
H₂O: 18 g/moleH₂: 2 g/moleO₂: 32 g/moleThen, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:
H₂O: 2 moles ×18 g/mole= 36 gramsH₂: 2 moles ×2 g/mole= 4 gramsO₂: 1 mole ×32 g/mole= 32 gramsDefinition of theorical yieldThe theoretical yield is the amount of product acquired through the complete conversion of all reagents in the final product, that is, it is the maximum amount of product that could be formed from the given amounts of reagents.
Theorical yield of O₂The following rule of three can be applied: if by reaction stoichiometry 36 grams of water form 32 grams of oxygen, 29.2 grams of water form how much mass of oxygen?
[tex]mass of oxygen=\frac{29.2 grams of waterx32 grams of oxygen}{36 grams of water}[/tex]
mass of oxygen= 25.956 grams
Finally, the theoretical yield of oxygen when 29.2 g of water are decomposed by electrolysis is 25.956 grams.
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Why are there craters on the Moon? (i can't find science or Selenography)
Answer:
Craters on the Moon are caused by asteroids and meteorites colliding with the lunar surface. The Moon's surface is covered with thousands of craters. Unlike the Earth, the Moon has no atmosphere to protect itself from impacting bodies.
Explanation:
Answer:
There are craters in the moon caused by asteroids and meteorites colliding with the moons surface
Explanation:
Unlike Earth it doesnt actually have a atmosphere to protect itself from being struck by the asteroids and or meteorites since our atmosphere pushes back anything entering if it can reach the inside of the object it could break it apart from the inside which is why many rockets are set up with protective layers to avoid being split apart during re entering.
Explain what a gene is in your own words.
Answer:
unit of heredity which is transferred from a parent to offspring and is held to determine some characteristic of the offspring.
Explanation:
Equal but opposite forces are said to result in a(n)_____force of zero
Answer:
WHAT ARE THE OPSHIONS
Explanation:
50 POINTS+BRAINLIEST: What is a base and what is its function?
Answer:
A base is a substance that reacts with hydrogen ions and can neutralize the acid. Most bases are minerals that form water and salts by reacting with acids. Bases include metal oxides, hydroxides, and carbonates.
Hope this helps!
Select the correct answer from each drop-down menu.
Flow chart, The Rock Cycle. Top, rectangular block Igneous points to blocks A (left), B (right). Block B points to middle block Magma to Igneous block. Words read, increasing pressure and temperature, weathering, deposition, lithification.
In this model of the rock cycle, A represents
rock and arrow B represents the process of
Answer: A
Explanation:
The spot labelled as'A' in the image will turn into extrusive igneous rocks.
What are igneous rocks?
Igneous rocks are one of the three main rock types the other two including sedimentary and metamorphic rocks.These rocks are formed by cooling and solidification of lava or magma.
The magma is derived from partial melts in the planet's mantle or crust.Melting is caused by increase in temperature or decrease in pressure or even change in composition.Solidification occurs either below surface which is called as intrusive rocks or on the surface as extrusive rocks.
They are classified according to their texture,mode of occurrence,chemical composition,geometry and mineralogy of rock.The two important variables for classification are mineral composition and cooling history.
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whats the primarry reason for a diffrence in climate between new york and florida
Answer:
Explanation:
Florida is much closer to the sun as compared to New York and seems to be much warmer as compared to New York even in winter and summer because of the latitude.
Answer: Florida is much closer to the sun as compared to New York and seems to be much warmer as compared to New York even in winter and summer because of the latitude.
Explanation:
Plants adapted to store _________________ can survive the _________________ of the savanna dry season. Many _________________ and short trees with far-reaching _________________ inhabit this biome
Explanation:
Plants adapted to store water for long periods can survive the droughts and arid heat of the savanna dry season. Many xerophytes, such as cacti and short trees with far-reaching roots inhabit this biome.
Pick correclty what words in the boxes best matches the statement.
When rocket fuel burns, it goes through a [chemical change/physical change], which means [new substances/no new substances] are formed.
Answer:
Chemical change, new substances
Explanation:
Due to the abundance of _________________, large herds of _________________ and _________________ animals thrive in the savanna. Large, fast-moving _________________ hunt the herbivores, who each have their own special adaptations that allow them to survive
Answer:
Africa
zebra
giraffe
carnivore
sorry if im wrong
Explanation:
what is the mass (in grams) of 4.7 moles of trifluoride dibromide
I will give anything for this
PHeallllllllllllllleeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
this is due today
643.4262851200001 or 318.68918512000005 Not sure if this is right...
Witch correct word or words compare the properties of a substance before and after it goes through a chemical change.
This is about rocks and/or minerals
Could you please put your question down so I can answer it specifically? Rocks and minerals is a broad field!
Have a good day :).
Once again rocks and/or minerals
How could you determine whether
an unknown substance is a mineral?
Answer:
you can classify a mineral by its appearance and other properties. The presence of a mineral is defined by the color and luster, and the color of the powdered mineral is described by the band. Every mineral has a distinctive density. To compare the hardness of rocks, the Mohs Hardness Scale is used.
Explanation:
Answer:
Luster, hardness , colour , clevage and magnetism
Explanation:
1. Luster makes sure the light is reflected by the mineral.
2. On the 10-point Mohs scale, which is basically a scratch test, hardness is measured. Take an unidentified mineral and scrape it like a fingernail with an object of known hardness.
3. Zurite, for instance, is often a deep blue, and malachite is gray.
4. In minerals that appear to divide along one or more flat surfaces or planes, cleavage may be observed.
5. Magnetite, for instance, has a heavy pull that even weak magnets can draw. But there is only a poor attraction to other minerals, particularly chromite (a black oxide) and pyrrhotite (a bronze sulfide.)
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Since oxygen is found in the molecule O2 and hydrogen as the molecule H2, what will need to happen to make water or H2O?
Answer:
i found this online
Explanation:
hope i was of some help
D. All parts of Earth experience the same amount of
3. An arrangement is shown below.
Earth
moon
sun
What effect does this arrangement have on the tidal range?
A. The tide is larger than normal because the gravitational forces of the sun and moon pull in the
same direction.
B. The tide is larger than normal because the gravitational forces of the sun and moon pull in
opposite directions.
C. The tide is smaller than normal because the gravitational forces of the sun and moon pull in
the same direction.
D. The tide is smaller than normal because the gravitational forces of the sun and moon pull in
opposite directions.
Answer:
A. because this is a spring tide.
Explanation: The sun and the moon are working together, their gravitational forces pull on the tides more. Your question said "The tide is larger than normal because the gravitational forces of the sun and moon pull in the same direction". They are working together to cause higher than normal tides.
Explain what a trait is in your own words.
A scientist evaluates its livestock and determines which livestock it is
going to allow to mate. What is this process called and how will this impact
the genetic traits of the livestock?
Any animals look for steangth mostly because the offspring can probobly onther trait is looks. The male will try to impess the female.
help meeee
i don’t want the sample response!
Please help, I don't get what does this means
3. Name the compound sodium makes with the following elements.
(a) Calcium carbonate:
Answer: hydrogen-carbonate.
Explanation:Because when carbon dioxide is passed in excess it leads to a formation of hydrogen-carbonate.
I hope everyone finds this helpful
Which statement is true about the fossil record?
A. The fossil record shows that organisms have changed very little over time.
B. The fossil record is inconsistent with the scientific theory of evolution.
C. The fossil record is very limited and offers little knowledge about the history of life.
D. The fossil record shows how different groups of organisms have changed over time.
Answer:
D is correct!
Hoped I helped! :)
i need help on 2 questions! 19points! about charles darwin
Answer: Yes he is successfull because he has released many books.
Explanation:
____ ha no nucleus.
Genetic information in prokaryotic cells just sort of floats free in the cytoplasm
I think its prokaryotes?
What type of heat transfer heats the air in our homes? A. radiation B. conduction C. convection
Answer:
I believe the answer is A. Radiation/ Radiant Heat.
100 POINTS+BRAINLIEST: 8th grade science- can someone please explain why water is found in organisms more than DNA, if every single living thing has DNA and water??
is the "correct answer" wrong?
Answer:
Hey there!
You are right by saying that "every living thing has DNA" but water is is the most abundant molecule in cells, accounting for 70% or more of total cell mass.
Water is found in every single cell and that too 70%
Hope it helped you! ^^
Answer:
Water is found in every organism more than DNA. I say this because most organisms have bodies that are filled to 90% with water.
Explanation:
ur welcome
100 POINTS+BRAINLIEST: How do you balance a chemical equation step by step? Please explain in simple language, give definitions to complex words and provide some rules to remember when balancing the equations. Use C3H8+O2—> H2O+CO2 as an example. THANKS SO MUCH!!!
Answer:
list all the elements.
you need to find a number to multiply both sides to get the same result.
example: I said on the left side: 5×O2 which is 10. on the right side I do the same to get 10.
In order to do this I said: 4×H2O which is 8 H2,and 4 O.
I then said 3×CO2 which gives 3 C and 6 O2. 6+4=10.
Now Oxygen(O) is balanced. Do the same for the rest of the elements.
Explanation:
pls mark as brainliest thanks!
Let's use
C3H8+O2—»H2O+CO2Calculate atoms on both sides
On reactant side
C=3H=8O=2On product
H=2O=3C=1Now balance both sides by making atoms equal
The balanced one is
C3H8+5O2—»3H_2O+4CO_2A similar reaction is used frequently in laboratory experiments as an indicator. Can you guess what that might be?
We mixed baking soda with vinegar and drew on a piece of paper when it was done bubbling, then took a sponge and covered the paper in grape juice.
Answer: ph scale
Explanation:
When baking soda is mixed with vinegar, bubbling is observed. This is because of a chemical reaction which involves the evolution of carbon dioxide gas. This reaction is used as an indicator of carbon dioxide.
What is an Indicator?An indicator in chemistry is any substance that gives a visible sign or indication of a chemical species by a change in color. An indicator is generally used to identify an acid or an alkali present in a solution.
Indicators are weak acids or alkalis that show a change in color as the concentration of hydrogen ions in solution changes. Commonly used chemical indicators include Litmus, turmeric, Methyl Orange, phenolphthalein, etc.
When baking soda is mixed with vinegar evolution of gas bubbles is observed. This gas when passed through lime water, the solution turns milky which confirms the presence of carbon dioxide in solution.
Therefore, chemical indicators can be used in identification of a chemical species.
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Timothée Chalamet is hot
(true) or false
yes Timothee Chalamets is the hottest guy in the world
Answer:
True
Explanation:
In my opinion, LOL
please help me ilysm god loves you!!
Answer:
i don't know
Explanation:
Answer:
Nothing: you now have salty HCl but that’s it. (NaCl is a neutral salt it will not react with HCl)