In order from left to right, what are the coefficients (front numbers) needed to
balance the following equation? H2O2(aq) → H2O(1) + O2(g)*
Answers
Answer:
2H2O2 → 2H2O + O2
Explanation:
Related Questions
The corn crop in an area is prone to infestation by larvae from moths that feed on the cornstalks and ears of corn. The techniques used by two farmers to protect the corn crop are described below.
Technique A: Sprayed his corn crop with an insecticide. The insecticide is known to kill all honeybee, butterfly, and moth larvae.
Technique B: Used a genetically modified variety of corn. The plant produces an insecticide which selectively kills only the moth larvae as it feeds on the corn.
Which technique is likely to have less of an impact on the environment?
Technique B because it may help humans who consume corn to fight bacteria
Technique A because it kills a broader variety of insects to protect the corn
Technique B because it preserves the harmless insects and targets only the moth larvae
Technique A because insecticide use is better for preserving the environment.
Answers
Answer:
Its C
Explanation:
Method A puts a type of spray that kills bees plus butterfly's which would make their population decrease. Which isnt helpful and harms the enviroment a lot. Answer A dosent make sense it may be harmful
Answer: c
Explanation:
I took the quiz
Individual organisms have a variety of traits that make them different from each other. Traits such as fur color and eye color vary from one individual to another. What determines the traits of an individual organism?
Answers
Answer:
Traits can be determined mostly by genes but can be by environmental factors, or a combination of both. Traits can be qualitative (such as eye color) or quantitative (such as height or blood pressure) A given Trait is part of an individual's overall phenotype.
I hope this helps you out!
How does mercury find its way into our ecosystems?
a.) Found in paints
b.) Found in solder joints of copper
c.) Burning coal
d.) Insulation in older houses
Answers
Properties of cotton ball
Answers
Answer:
1. Absorbent
2. Breathable.
3. Hypoallergenic.
4. Non-toxic.
5. High wet modulus (stronger when wet)
6. Biodegradable.
7. Excellent wicking.
8. Wipe dry performance.
Answer:
Stringy, light, spherical, absorbant, small, and thread-like (because you can make cotton into clothes).
Iodine-138 decays by beta decay. What element does it produce?
Answers
\( {xe}^{138} \)
Explanation:
the bottom number would be 54. This is because you add one to 53 to make it 54 and you add 0 to 138.
A sample of oxygen gas has a volume of 45.8 mL when its pressure is 0.492 atm. What
will the volume of the gas be at a pressure of 0.954 atmospheres, if the temperature
remains constant?
Select one:
O a. 23.6
Ob. 0.0102
O c. 88.8
O d. 0.0113
Answers
Answer:
a. 23.6Explanation:
\(P_1=0.492\:atm\\V_1 = 45.8\:ml\\V_2 = ?\\P_1 = 0.954\:atm\\\\Boyle's Law = P_1V_1 = P_2V_2\\\\Lets \:make\: V \:subject\:of\:the\:formula\\\\\frac{P_1V_1}{P_2} = \frac{P_2V_2}{P_2} \\ \\V_2 =\frac{P_1V_1}{P_2} \\V_2 = \frac{0.492\times45.8}{0.954}\\ \\V_2 = \frac{22.5336}{0.954} \\\\V_2 = 23.620\\\\V_2 = 23.6\)
I just need help all I need is the answer please some one
Answers
Answer: The correct fill-in-the-blank answers are:
1. through binary fission (already filled in)
2. be resistant to penicillin
3. through asexual reproduction.
4. cell replicates before
5. a simpler process
Explanation:
The correct fill-in-the-blank answers are:
1. Bacteria reproduce through binary fission (already filled in)
2. A parent bacterial cell is able to survive in the presence of antibiotic penicillin. Subsequent generations from this parent will be resistant to penicillin
3. Something that potatoes and bacteria have in common is that they both reproduce through asexual reproduction.
4. In asexual reproduction DNA from the parent cell replicates before it produces daughter cells.
5. Asexual reproduction is a simpler process than sexual reproduction.
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1. Using D10W and a vial of NaCl 4 mEq/mL, how many mL of NaCl are needed to prepare 250 mL of a
D10/NS solution?
a. 4.8mL
b. 9.6ml
c. 19.6mL
d. 154mL
Answers
To prepare 250 mL of a D10/NS solution using D10W and a vial of NaCl 4 mEq/mL, you would need 9.6 mL of NaCl. Normal saline (NS) contains 154 mEq/L of sodium chloride (NaCl). To prepare 250 mL of NS, you would need 250 mL * (154 mEq/L) = 38500 mEq of NaCl. Since the vial of NaCl contains 4 mEq/mL, you would need 38500 mEq / (4 mEq/mL) = 9625 mL = 9.6 mL of NaCl. So the correct answer is b. 9.6ml.
Suppose you are shooting a basketball toward a hoop. As the ball rises in the air, its ---------------- energy increases and its ---------------------------- decreases.
Answers
Answer:
Suppose you are shooting a basketball toward a hoop. As the ball rises in the air, its -------Potential --------- energy increases and its -----------kinetic----------------- decreases.
Explanation:
Kinetic energy is the energy of movement or change. Potential energy is the energy a system has as a result of being able to undergo some change. ... As an object falls its potential energy decreases, while its kinetic energy increases. The decrease in potential energy is exactly equal to the increase in kinetic energy.
potential//energy by position
How could you turn steam into a liquid?
A. Using a magnet
B. By removing thermal energy
C. By evaporating it
D. By adding thermal energy
Answers
Answer: B
Explanation:
CONDENSATION When steam is cooled, it releases thermal energy and turns into its liquid state. This process is called condensation.
A is incorrect because using a magnet has nothing to do with a phase change.
C is incorrect because the steam cannot be evaporated
And D is incorrect because if you add thermal energy, the particles would move really fast and possibly turn into plasma.
Hope this helps;)
What characteristic of an element determines how its atoms can bond with other atoms?
A. its total number of electrons
B. its number of valence electrons
C. how many low-energy-level electrons it has
D. how many protons and neutrons it has
50 brainly points!
Answers
Answer:
The answer is A
Explanation:
its total number of electrons
Iron oxide F E 2 O 3 is formed when iron F E and oxygen (O2) react in the presence of water (H2O) in the air. Why is the formation of rust, iron oxide, considered a chemical change? I WILL MAKE YOU BRAINLIEST
A. Rust is a new substance with different properties than oxygen or iron.
B. None of the above.
C. Rust is a mixture of iron and oxygen.
D. Rust has the same chemical formula as oxygen and iron.
Answers
A. Rust is a new substance with different properties than oxygen or iron.
B. None of the above.
C. Rust is a mixture of iron and oxygen.
D. Rust has the same chemical formula as oxygen and iron.
The answer is: A
Answer:
A
Explanation:
bro
How to work out the relative mass of potassium? What is the calculation? ( explained very easily )
Answers
Answer:
39
Explanation:
Relative mass does not need to be calculated as it is listed on the periodic table. Potassium's relative atomic mass is around 39.
———————————
(1/12)th Mass of one C12 atom
Answer please and thank you
Answers
Answer:
speed is the distance an object travels per unit of time
velocity is speed in a given direction
Answer:
1. Speed in a given dirrection
2. The rate at wich velocity changes with time
Explanation:
I took the test.
√225/√25 = ?? hurry please I'm stuck on it
Answers
Answer:
√225/√25 =3
The answer is 3
Explanation:
Answer:
The answer is 3
Explanation:
the color of a mineral is powdered form
a. luster
b.streak
c.hardness
science i need help please
Answers
Answer: Streak
Explanation: The color of a mineral in powdered form is called the mineral's streak. To find a mineral's streak, the mineral is rubbed against a piece of unglazed porcelain called a streak plate. The mark left on the streak plate is the streak.
The streak of a mineral is its powder's color, because streak does not vary, it is a more dependable quality than color. Minerals of the same color may have a streak of a different hue, hence option B is correct.
The streak of a mineral refers to the color of the material when it is in powdered form. A streak plate is an unglazed piece of porcelain that is used to locate a mineral's streak. The streak is the mark that was left on the streak plate.
When minerals are powdered, they often take on a distinct hue than when they are in crystal or massive form. It might be a completely different tint or a completely different color.
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If flour, butter, chocolate chips, and a little baking soda are mixed together, and then shaped it into flat circles, what kind of change has been made?
physical change
particle change
chemical change
color change
Answers
explanation: trust me bro
Fill in the blanks, please
A(n)_______________wave can travel through empty space or through matter.
There are_____________types of wave motion-transverse ________________, and a comination of both.
This is about WAVE and this is SCIENCE
Answers
Answer:
For the first one it is Electromagnetic waves and the second one is longitudinal and transverse and water water waves (I’m sorry if I get the second one wrong for you but the first I put is right)
Explanation:
An electromagnetic wave can travel through empty space or through matter.There are 2 types of wave motion-transverse ,longitudinal and a combination of both.
What is an electromagnetic wave?The electromagnetic radiation consists of waves made up of electromagnetic field which are capable of propogating through space and carry the radiant electromagnetic energy.
The radiation are composed of electromagnetic waves which are synchronized oscillations of electric and magnetic fields . They are created due to change which is periodic in electric as well as magnetic fields.
In vacuum ,all the electromagnetic waves travel at the same speed that is with the speed of air.The position of an electromagnetic wave in an electromagnetic spectrum is characterized by it's frequency or wavelength.They are emitted by electrically charged particles which undergo acceleration and subsequently interact with other charged particles.
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This graph compares the amounts of three different substances that can dissolve in 100 g of water at temperatures between 0° C and 100° C.
Which substance is most soluble?
substance 1
substance 2
substance 3
Answers
what is the awnser??? (pic is below)
Answers
Answer:
C: Radiation. Arrow x shows radiation. I hope this helps u! If it's wrong, please let me know!!
help please an btw this isn't a test ill give brainliest science is really my thing. btw help with number 6
Answers
ex: you grab an ice cube, the ice cube begins to melt because the warmth of your hand melts it, afterwards your hand is cold
hope this makes sense ! :-)
Your friend asks you where their horse went. You say that it ran toward the forest. What is the reference point?
A) your friend
B) you
C) the forest
D) the horse
Answers
Answer:c the forest
Explanation:l
what is the dot and cross diagram for potassium nitrate
Answers
The number of electrons in each of Potassium's shells is [2, 8, 8, 1] and its electron configuration is [Ar] 4s1.
Name and Title:
Include your name, instructor's name, date, and name of lab.
Objectives(s):
In your own words, what is the purpose of this lab?
Hypothesis:
In this section, please include the predictions you developed during your lab activity. These statements reflect your predicted outcomes for the experiment.
Procedure:
The materials and procedures are listed in your virtual lab. You do not need to repeat them here. However, you should note if you experienced any errors or other factors that might affect your outcome. Using your summary questions at the end of your virtual lab activity, please clearly define the dependent and independent variables of the experiment.
Data:
Record the elements present in each unknown astronomical object. Be sure to indicate “yes” or “no” for each element.
Hydrogen Helium Lithium Sodium Carbon Nitrogen
Moon One
Moon Two
Planet One
Planet Two
Conclusion:
Your conclusion will include a summary of the lab results and an interpretation of the results. Please answer all questions in complete sentences using your own words.
Using two to three sentences, summarize what you investigated and observed in this lab.
Astronomers use a wide variety of technology to explore space and the electromagnetic spectrum; why do you believe it is essential to use many types of equipment when studying space?
If carbon was the most common element found in the moons and planets, what element is missing that would make them similar to Earth? Explain why. (Hint: Think about the carbon cycle.)
We know that the electromagnetic spectrum uses wavelengths and frequencies to determine a lot about outer space. How does it help us find out the make-up of stars?
Why might it be useful to determine the elements that a planet or moon is made up of?
Answers
What is always true of a strong acid?
Answers
Answer:
The strong acid provides more H+ ion whereas the weak acids produce less H+ in the aqueous solution resulting in less amount of electricity conduction in the solution.
Weak acid- lesser amount of H+ produced
Strong acid- greater amount of H+ ( proton) produced
Louise has put together the setup shown in the figure to investigate how different masses respond to different forces. A mass is attached to two stretched springs. It rides on a track with very little friction. When Louise pushes the mass to either side and then lets it go, it oscillates back and forth, much like a pendulum. Explain why the mass oscillates.
Answers
Answer:due to the kinetic energy stored in spring
Explanation:
this happen because when spring ia stretched it store kinetic energy and it has the ability to move back and forward so this happen
Due to stored kinetic energy in the spring, the mass oscillated like a pendulum.
It is given that a mass is attached to two springs that are stretched. When Louise pushes the mass to either side and then lets it go, it oscillates back and forth resembling a pendulum.
This movement is observed because the mass if the block placed is shared between the two springs. This let the two springs to store the energy in them. This could also be given as potential energy.
When the mass is moved in the either side, the potential energy in the springs are turned into kinetic energy leading to movement of the mass. Since, the mass is help up with two springs, oscillatory movement or to and fro motion of the spring is observed.
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Drag the tiles to the correct boxes to complete the pairs.
Match the inheritance patterns with the scenarios that exemplify them.
codominance
multiple alleles
incomplete dominance
A pink roses are formed when red roses are mated with white roses.
arrow -
Genes with the alleles IA, IB, and i are responsible
for expression of A, B, and O blood types.
arrow -
A red flower and a white flower produce
an offspring with equal proportions of red
and white coloration.
arrow -
Answers
Answer:
A Pink roses are formed when red roses are mated with white roses= incomplete dominance
Genes with alleles IA, IB and I are responsible for expression of A B and O blood types= Multiple alleles
A red flower and a white flower produce
an offspring with equal proportions of red
and white coloration= Codominace
Explanation:
Took quiz and got it right
A pink roses are formed when red roses are mated with white roses shows incomplete dominance.
What is incomplete dominance?Incomplete dominance is defined as the dominance occurs from a cross in which each parental contribution is genetically distinct and produces children with an intermediate phenotype.
Semi-dominance and partial dominance are other terms for incomplete dominance.
Genes with the alleles IA, IB, and I are responsible for expression of A, B, and O blood types shows multiple alleles.
A red flower and a white flower produce an offspring with equal proportions of red and white coloration shows codominance.
Thus, a pink roses are formed when red roses are mated with white roses shows incomplete dominance.
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Emily has three rods which are all the same size and are all composed of a pure substance. She wants to find out if all three rods are made of the same pure substance. To do this, she adds a piece of wax with a little bead on top to the end of each rod. She then heats up the opposite end of one rod using Bunsen burner. Emily waits for the rod to heat up completely so that the wax at the other end melts and the bead drops. She measures how long it takes for the bead to drop. She then repeats this process with the other two rods. The diagram below shows Emily's experimental setup. The results of her experiment are also shown below.
Based on this experiment and the results, what can be concluded?
A.
Rods A, B, and C are all made of different substances.
B.
Rod B is made of the same substance as rod C.
C.
Rod A is made of the same substance as rod B.
D.
Rods A, B, and C are all made of the same substance.
Answers
Answer: A
Explanation:
Rod A took 45 seconds.
Rod B took 30 seconds which is 15 seconds less than Rod A
Rod C took 60 seconds which is 15 seconds more than Rod A, and 30 seconds more than Rod B.
If all of them were made of the same substance, they all would have the same time, since they all have different times, then they all are made of different substances.
HELP ME ASAP PWEASS!!!
Data Table
On the table below, record your observations before and after the interactions and explain how mass was conserved. Describe the changes in properties that prove a chemical reaction occurred. The first row is an example.
Observations Before Interaction
Observations After Interaction
How was mass conserved?
Proof of a Chemical Reaction
Example: Sugar + Heat
The sugar is in tiny white particles in a pile. Heat is not seen but is implied by the heat source. The pile of sugar in the pot has a mass of 100 grams.
There is a solid, light brown mass at the bottom of the pot. It has a mass of 100 grams.
The mass of the sugar is the same in melted form as it is in solid crystal form.
There was not a chemical reaction. Sugar did not change composition. It only melted. Melting point is a physical property, and this is a physical change.
Steel Wool + Oxygen (Fire)
Egg + Heat
Water + Heat
Zinc + Hydrogen Chloride
Sodium Hydroxide + Copper Sulfate
Answers
Answer:
Steel Wool + Oxygen (Fire) The steel wool is a grayish color and has a rough surface. Oxygen is transparent It looks like a powder, and like if it was rusted steel wool but then broken apart and turned into a powder Well Iron oxide is 7 grams and steel wool combined is 7 grams so you can say that the mass was conserved Yes, this is a chemical change because the steel wool rusted and rust is a chemical change, so iron oxide causes because if a physical change.
Egg + Heat The egg has a yellow yolk in the middle while there is some type of liquid at the border of the yolk, but it is clear, the heat is hot but transparent The egg turned into a delicious food called an omelet what was yolk staid as a liquid but got a tad harder, but the transparent border around it turned white It was conserved because the eggshell was 4 grams and the fried egg is 41 grams It is a chemical change because it results in the formation of new particles, and the chemical bonds break up and new ones are formed.
Water + Heat The water is a clear liquid, while the heat is very hot but transparent The water turned into a type of oxygen -Water Vapor- If 5 g of water becomes a gas it becomes 5 g of water vapor. The mass of the liquid water is simply transferred into the mass of the newly formed water vapor. There was no chemical reaction because the water vapor can be turned back to water also it just changed from a liquid to a gas and did not change its composition
Zinc + Hydrogen Chloride Zinc: a white/silver metallic solid. Hydrogen chloride (dilute hydroelectric acid) is a transparent, colorless liquid with a very low pH (acidic). Zinc "dissolved" in hydrogen chloride, while emitting a colorless gas. The liquid remains a colorless liquid, possibly still having a low pH from the unused acid. The colorless gas collected in a test tube gives a popping sound when ignited with a burning wooden splint, so it is not air embedded in the zinc, nor dissolved in hydroelectric acid. Well although the zinc chloride is 12 grams and not 15 the gas that was released was 3 grams and as we all know 3 + 12 is 15 so you could say that the mass was conserved The production of a new substance (most probable hydrogen) from the reaction of the two reactants. When a few drops of the liquid product are evaporated on a watch glass, a white residue is left. When a few drops of the liquid hydroelectric acid are evaporated on a watch glass, there is no residue. This proves that a new product (hydrogen gas), (white powder, zinc chloride) is produced instead of zinc being physically dissolved in hydroelectric acid.
Sodium Hydroxide + Copper Sulfate Sodium hydroxide is a turbid solution and copper sulfate is in form of bright blue crystals. When their solutions are mixed, a pale blue precipitate of basic copper hydroxide & a solution of neutral salt sodium sulfate will be formed. The sodium hydroxide and the copper sulfate combined to make a total of 67 grams and the product is split because the sodium sulfate is 47 grams and the copper hydroxide is 20 grams but altogether it is still 67 grams so you could say that the mass was conserved The proof of the reaction is the appearance of pale blue precipitates of basic copper hydroxide & a solution of neutral salt sodium sulfate.
Match the term to its definition (Lessons 6.03, 6.04 and 6.05)
(i can't fit this all without confusion)
Answers
Answer: the first paragraph is rain forest biome and the 2nd one is arctic tundra biome and finally the last paragraph is ocean or marine biome
Explanation:
rain forests have warm temperatures and include alot of animals and plants , artctic tundra biome includes cold temperatures ice stuff and all that and ocean or marine biome is pretty much just the ocean with seals , whales and marine life yk.