an endothermic reaction causes the surroundings to
Answer:
an endothermic reaction absorbs heat and cools its surrounding
Explanation:
a substance that cannot be broken down into simpler substances
Elements are pure substances that cannot be broken down into simpler substances by ordinary chemical means.
Question 2 (5 points)
(04.01 LC)
Look at the chemical equation:
2H2S + 302 - 2H2O + 2502
How many atoms of hydrogen (H) are present on both sides of the equation? (5 points)
a
2.
Ob
3
Ос
4
Od 6
Answer:
4 atoms
Explanation:
I hope it helps you!
BALANCED WORD EQUATION Aluminium carbonate + hydrochloric acid -->
Answer: 2Al+6HCl→2AlCl3+3H22Al+6HCl → 2AlCl3 + 3H2
Explanation:
Can som one pls do this for me easy 50 pointssssssssss
animal: Southwestern Sea Otter
What are the threats to the survival of this species in the United States?
What, if anything, has been proposed to save the species?
What role does the species play in its environment?
If the species disappeared, what effect might it have on the environment?
How much, if anything, is being spent on conservation efforts in the United States for the species?
someone pls just answer the questions and put them on the answer box
Answer:
1. southwestern sea otters include entrapment or entanglement in fishing gear, oil spills, and climate change.
2. Reduce, reuse, and recycle whenever you can.
Dispose of hazardous wastes properly.
Grow a garden. The roots take in water, reducing the amount of runoff.
Use nontoxic household cleaning products.
Don’t litter or dump materials into storm drains.
Pick up after your pets.
Use less water.
Purchase sustainable, recycled, biodegradable goods.
Volunteer to help or create a beach clean up.
Get your car oil changed to prevent leaks.
Donate to the California Sea Otter Fund.
Learn more about ocean issues and share your knowledge!
3. They eat sea urchins and other invertebrates that graze on giant kelp. Without sea otters, these grazing animals can destroy kelp forests and consequently the wide diversity of animals that depend upon kelp habitat for survival.
4. sea otters are critical to maintaining the balance of nearshore ecosystems, such as kelp forests, embayments and estuaries. Without sea otters, sea urchins can overpopulate the sea floor and devour the kelp forests that provide cover and food for many other marine animals.
5. haven’t found anything on that
Answer:
Threats to southern sea otters includes: 1.entrapment or entanglement in fishing gear, 2.oil spills, and climate change
Yeah something has been proposed to save the species which are:
1.Reduce, reuse, and recycle whenever you can.
2.Dispose of hazardous wastes properly.
3.Use nontoxic household cleaning products.
4.Don't litter or dump materials into storm drains
5.Purchase sustainable, recycled, biodegradable goods.
6. Range expansion is key to southern sea otter recovery and to the restoration of ecosystems in which sea otters were once the keystone species.
Southern sea otters play a critical role as a keystone species.
Without sea otters, sea urchins can overpopulate the sea floor and devour the kelp forests that provide cover and food for many other marine animals. Sea otters help ecosystems capture carbon from the atmosphere and store it as biomass and deep-sea detritus, preventing it from being converted back to carbon dioxide and contributing to climate change.
Sea Otter Fund: $3 Million and Counting
Hope this helps pls mark me Branliest
why do we adjust coefficients when balancing chemical equations and not subscripts?
Answer:
By changing the coefficients you change the amount you have of certain compounds in the equation, whereas changing the subscript would change what compounds are actually in the equation because it would change the ratio of how many atoms of each element are in a compound.
For Example:
Outside of Balancing Equations, [tex]NO_{2}[/tex] (Nitrite) and [tex]NO_{3}[/tex] (Nitrate) are different because one forms a strong acid while the other forms a weak acid based on how many oxygen atoms are added to the compound. So in a chemical equation, if you change the subscripts, you change the entire compound so your reaction may be with a weak acid instead of a strong acid and give you a different product. Meanwhile, changing the coefficient changes the amount of the compound you have for the reaction in order to maintain the Conservation of Mass Law.
what is the main difference between sexual and asexual reproduction
Answer:
Asexual reproduction does not involve sex cells or fertilisation . Only one parent is required, unlike sexual reproduction which needs two parents. Since there is only one parent, there is no fusion of gametes and no mixing of genetic information.
The main difference between sexual and asexual reproduction is that sexual reproduction involves the fusion of gametes, while asexual reproduction does not.
In sexual reproduction, offspring are produced through the fusion of gametes (reproductive cells) from two parent organisms. This fusion, known as fertilization, results in offspring that inherit genetic material from both parents. This genetic recombination introduces variation in the offspring, promoting genetic diversity within a population.
In contrast, asexual reproduction involves the production of offspring without the involvement of gametes or the fusion of genetic material from two parents. A single parent organism reproduces by generating genetically identical or near-identical offspring through various methods such as budding, fragmentation, or binary fission. Asexual reproduction typically leads to offspring that are genetically identical to the parent, lacking the genetic diversity observed in sexual reproduction.
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chemistry A Gases unit test
Answer:
gas is composed to particles and has a mass.
Look at the three kinds of houses shown in the simulation. Which house do you think will best resist damage from a tsunami? Which house will suffer the most damage from a tsunami? Do you think any of the houses will survive a large tsunami? Write down your predictions.
Answer:
The brick house will best resist damage from a tsunami, and the straw house will suffer the most damage from a tsunami. I predict these reasons because brick has a stronger material than the rest of the houses, while the straw house has the weakest material than the rest of the houses. No, I do not think any of the houses can survive a massive tsunami because if the tsunami was 22 feet tall, the brick house would become damaged due to the lack of support. And, the other houses can't take a tsunami higher than 10 feet. The brick house can only take tsunamis less than 20 feet.
Explanation:
Try that
which characteristic of bones is often very different from one individual to another?
a. the number of bones
b. the cellular make up of the bones
c. the size of the bones
d. the composition of the bones
during an earthquake, geologists use a machine called what
Answer:
sesimographs
Explanation:
Answer:
A seismometer
Explanation:
it measures seismic waves
What is true about the light shown above?
A. All of the light is refracted
B. All of the light is reflected
C. Some of the light is refracted, and some of the light is reflected
D. None of the light is refracted or reflected
Answer:
The answer is D. None of the light is refracted or reflected.
Explanation:
Just trust :)
how many moles of c are formed upon complete reaction of 2 mol of b according to the generic chemical reaction: a 2b->c
Answer:
1 mol
Explanation:
It's about balacing the equation. 2 parts "b" can form 1 part "a". So take 2 mol and divide by 2.
How many moles are present in 5.67x10^25 atoms of Carbon (C)?
Answer:
94.155 Moles
Explanation:
Since you are given atoms, to get to moles you need to use the formula I used below. Pretty simple, just plug and chug. Work can be found below.
Hope this helps! :^)
94. 125 moles are present in 5.67x10^25 atoms of Carbon (C).
What is mole?
The mole is a unit of measurement that is comparable to well-known units like pair, dozen, bulk, etc. It offers a precise count of atoms or molecules in a large sample of materials.
The amount of substance that has the same number of discrete entities (atoms, molecules, ions, etc.) as the number of atoms in a sample of pure 12C weighing exactly 12 g is known as a mole.
The word "mole" has a "big mass" or "bulk" sense in Latin, which is congruent with its use as the name for this unit. The mole establishes a connection between bulk mass, which is a simple macroscopic attribute to measure, and the number of atoms, molecules, and other fundamental units, which is a crucial fundamental property.
Therefore, 94. 125 moles are present in 5.67x10^25 atoms of Carbon
(C).
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Scientists theorize that the original point of matter from which our universe formed was smaller than a dime. This matter would also have:
a. had unimaginable mass
b. been incredibly dense
c. had unimaginable potential energy
d. all of the above
ANSWER:
B. been incredibly dense? I'm not sure sorry
for which elements are outer electrons and valence electrons the same?
Answer:
The number of electrons in the outermost shell of a particular atom determines its reactivity, or tendency to form chemical bonds with other atoms. This outermost shell is known as the valence shell, and the electrons found in it are called valence electrons.
Explanation:
Elements of same group have same number of valence electrons and similar physical and chemical properties.
What are groups in periodic table ?A periodic table is classified into different columns and rows. The vertical columns in the table are called groups and the horizontal rows are called periods.
From left to right, the atomic number of elements increases by one and atomic size increases. Down a group, the number of electrons and atomic size as well increases.
Elements of same groups have same number of outer electrons or valence electrons. They show similarities in chemical and physical properties.
For example, lithium and sodium are in the first group. They both have one valence electron.
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please help I attached an image
Answer:
B
Explanation:
Nonmetals have nearly full valence shells and try very hard to get that last few electrons to complete their valence shell. This allows them to achieve noble gas stability. This is why they have high electronegativities and electron affinities.
An element has 3 electrons, 3 protons and 4 neutrons. What will be its atomic number and mass number? (
Answer:
its atomic number will be 3 and it's mass number will be 7. it is lithium
Suppose you are planning an afternoon picnic a week in advance. Fair weather is forecast for that day, but a storm is expected that night. What will you do? Explain your reasoning.
I'd schedule the picnic a bit earlier than originally planed. I'd do this because everyone can be home by the time the rain starts.
If you don't want to do that do /weather clear and no more rain.
Describe how to do an experiment to show that when you dissolve salt in water the salt is still there.
Answer:
When salt is dissolved in water, the particles of salt get into the spaces between particles of water and starts dissolving and disappear.
Explanation:
Look at the three kinds of houses shown in the simulation. Which house do you think will best resist damage from a tsunami? Which house will suffer the most damage from a tsunami? Do you think any of the houses will survive a large tsunami? Write down your predictions. https://app.edmentum.com/redirect//358692this link will help the people answer my question the link
Answer:
all the houses will be damaged
Explanation:
i voted for it
As the pressure of an enclosed gas decreases to half its original value, what happens to the volume of the gas if the temperature is held constant?
Answer:
At this point the volume of the gas is halved. If the pressure on the piston is again doubled, the volume of gas decreases to one-fourth its original volume. FIGURE 9.8 Boyle's Law: At constant temperature, the volume of a gas sample is inversely proportional to the pressure.
The volume of the gas doubles.
Boyles law state that the pressure of a gas is indirectly proportional to the volume at constant temperature. It is given by:
PV = constant
Let us assume that initially the pressure is P and the volume is V, hence:
[tex]P_1=P,V_1=V[/tex]
The volume decreases to half its original value, hence:
[tex]P_2=\frac{P}{2}[/tex]
Therefore:
[tex]P_1V_1=P_2V_2\\\\\\PV=\frac{P}{2}V_2\\\\V_2=2V[/tex]
Therefore the volume of the gas doubles.
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A student wants to conduct an investigation on vapor pressure Which statement describes how vapor pressure is related to an observable phase change?
A liquid boils when the vapor pressure equals the boiling point.
A liquid freezes when the vapor pressure equals the melting point.
A liquid freezes when the vapor pressure equals the atmospheric pressure.
A liquid boils when the vapor pressure equals the atmospheric pressure.
The Whole Electrical Bonding Investigation Plan Quick check
1) B. boiling point, surface tension, vapor pressure
2) A. glycerin
3) C. the temperature at which additional heat energy causes the substance to change from a liquid to a gas
4) D. Heat each substance in liquid form to its boiling point. Measure the temperature of each substance
5) A. A liquid boils when the vapor pressure equals the atmospheric pressure.
The equation shows a neutralization reaction. H2SO4 2NaOH Na2SO4 2H2O What is Na2SO4? an acid a base a salt an ion.
Can anyone help meee
calculate the solubility product for the following solutions:
a) a saturated solution of cadmium sulfide, CdS (solubility = 1.46 • 10 ^ -11 mol / l
b) a saturated solution of calcium fluoride, CaF2, containing 0.0168g / l CaF2
Answer:
what is total amount of saturated solution
What is function of phylloclade
In some plants such as Cactuses, the stem is flattened and green and carries out the function of the leaf. Such a stem, adapted for the manufacture of food is called phylloclade. The leaves here are reduced or modified into spines to lessen the transpiring surface.
What is the type of potential energy that develops as the object changes shape
Answer:
The answer is Elastic Potential Energy
If you tum out all of the lights in a room and shine a green flashlight on to a red apple, what color will you see?
Answer:
black
Explanation:
In white light, a red apple absorbs all the colors (including green) of the spectrum except red, which it reflects.
A green filter absorbs all the colors of the spectrum except green, which is transmitted through the filter (and comes through as green light).
When the green light shines on a red apple, the red apple absorbs the green light.
Since there is no red light shining on the apple, there is no red light to reflect, so the apple appears black.
Hope this helps!
One of the following is not a property of metals
а
high malleability
ь
high compressibility
с
high melting point
d
high ductility
Answer:
option b
Explanation:
high compressibility is not a property of metal.
N2 + O2 → N205
how do i show my work im trying to balance the equation
Answer:
2N2 + 3O2 –2N2O3 this what I got balancing though