What are substances that cannot be broken down into simpler substances?
a. elements
b.compounds
c. molecules
d.protons
Answer:
Elements
Explanation:
Elements cannot be broken down into a simpler substance
What is a chemical equation, and
how do scientists use these
equations to represent chemical
reactions?
Answer:
A chemical equation is the symbolic representation of a chemical reaction in the form of symbols and formulae, wherein the reactant entities are given on the left-hand side and the product entities on the right-hand side.
In mathematic equations we use an equal sign (=) for example 2 + 2 = 4, but in scientific chemical equations, we use an arrow (→), for example C + O2→ CO2. To the left of the arrow, we have the 'before' situation. This side represents the substances we have beforethe reaction takes place. They are called the reactants.
When a predator population increases what happens to the prey population? Increase Decrease Dies Stays the same
Answer: as the number of predators increases, more prey are captured. as a result the prey population starts to decrease.
The density of hexane is 0.660 g/mL. What is the volume of a 57g sample of hexane?
2H₂ +0 a 2H₂O
Mole ratio of water to oxygen
Answer: 2:1
The ratio of hydrogen atoms to oxygen atoms used to make water molecules is always 2:1, no matter how many water molecules are being made.
Explanation:
Answer: GoodMorning: )✨2:1
The ratio of hydrogen atoms to oxygen atoms used to make water molecules is always 2:1, no matter how many water molecules are being made.
Have AN Amazing Day <3
What caused the deer population to grow early on?
A.) An abnormally cold winter caused offspring to die.
B.) A drought caused there to be less food and water available to the deer.
C.)The number of births was equal to the number of deaths in the deer population.
D.) The deer had a better food source so they had 2-3 fawns per year instead of 1 fawn
per year.
Answer:
i think it is C but not 100% sure.
Explanation:
Answer:
D) The deer had a better food source so they had 2-3 fawns per year instead of 1 fawn per year.
The other options show that the populations actually decreased, due to cold temperatures and droughts.
Let me know if this helps!
If a scale floated by and an astronaut stood on it, what would the scale say?
1.0kg
2.1/6 normal weight
3.9.8 m/s2
4.1/6 normal mass
Identifying Variables in the Effect of Type of Material on
Absorption Experiment
Answer the questions using the drop-down menus.
Which is the independent variable in this experiment?
Which is the dependent variable in this experiment?
Which is a controlled variable in this experiment?
In Absorption Experiment,
Water location is the independent variable in this experiment.
Room Temperature in the material is dependent variable in this experiment.
Type of a material is a controlled variable in this experiment.
What is Absorption Experiment ?Absorption experiment is nothing but the experiment of absorption of water in a material (sponge).
Experiment requires vessel, water and sponge.
Processor - take a vessel, pour water into it and dip sponge. take out the sponge. After taking of out sponge, water appears to be decreased from the vessel and sponge gets heavier. When we squeeze the the sponge, water drops down. It is because of water is absorbed by the spouge.
There are number of pores in the sponge, which absorbs the water.
Water location is the independent variable.
In this experiment Room Temperature is dependent variable in this experiment rate of absorption increases with increase in the temperature. decrease in the temperature cause to solidify the water. Type of a material is a controlled variable, we can change type of the material.
To know more about variables :
brainly.com/question/14289293
#SPJ7.
what is the conjugate base of HC6H6O6-
Answer:
the conjugate base of the compound is
C6h6O2/6-
Explanation:
subscript
The conjugate base of [tex]\rm HC_6H_6O_6^-\; is \; C_6H_6O_6^-[/tex].
What are conjugate acids and bases?Conjugate acid is the acid that donates a hydrogen ion to a base, conjugate acid contains a hydrogen ion.
The base that gains a hydrogen ion from a conjugate acid is called the conjugate base.
The acid is NH4 converts into a conjugate base NH3-
When a conjugate acid donates a hydrogen ion, it converts into the conjugate base.
Thus, the conjugate base is [tex]\; C_6H_6O_6^-[/tex]
Learn more about the conjugate base
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How much energy is required to raise the temperature of 3 kg of iron from 20°
C to 25°C? Use the table below and this equation: Q = mcAT.
Answer:
The correct option is (c).
Explanation:
Given that,
Mass of iron, m = 3 kg = 3000 g
The temperature of ice increases from 20° C to 25°C.
The specific heat of iron is 0.45 J/g°C
We need to find the energy required to raise the temperature. The formula is given by :
[tex]Q=mc\Delta T\\\\Q=3000\times 0.45\times (25-20)\\\\Q=6750\ J[/tex]
So, 6750 J of energy is required to raise the temperature or iron.
A sample of gas has a volume of 2.0 liters at a pressure of
1.0 atmosphere. When the volume increases to 4.0 liters, at constant temperature, the pressure will be
a. 0.50 atm
b. 2.0 atm
c. 0.25 atm
d. 1.0 atm
Claim: Sound is not matter. Which piece of evidence supports this claim?
Sound is made of atoms and has a specific density.
Sound is created when molecules vibrate in a medium,
Sound takes up space and can be weighed on a scale.
Sound does not have mass or volume, it is a form of energy.
Answer:
Sound Energy is a form of Mechanical Energy
If 1.0 mole of C8H18 are available to completely react
with enough O2, how many moles of H20 can be produced?
Answer: 1 mol C8H18 produces 9 mol H2O
Explanation: reaction : C8H18 + 12.5 O2 ⇒ 8 CO2 + 9 H2O
Which of the following is an example of a parasite?
a. A flea that bites an animal and sucks its blood to survive.
b. An orchid flower that sits on a tree branch
c. The bacteria that live in human intestines and help humans digest things.
d. An Egyptian plover that cleans a crocodile's teeth.
hmm helpo?
Answer:
a sorry if im wrong
Explanation:
Extra points if anyone can help me with those 2
Answer:
Blank 1 - Microscope
Blank 2 - Cell Theory
Explanation:
Answer:
microscope. and cell theory
Explanation:
with the invention of the microscope. scientists were able to create cell theory
The difference between asexual and sexual reproduction is _______. Please help me with this, thank you.
Answer:
hope this helped.
Explanation:
Sexual reproduction just means combining genetic material from two parents. Asexual reproduction produces offspring genetically identical to the one parent.
A list of changes is shown.
Temperature decreases
Intermolecular bonds become weaker
Freezing
Intermolecular bonds become stronger
Evaporation
Temperature increases
Vibration of molecules slows down
Molecules vibrate faster
Which of the above changes would be accompanied by an increase of the kinetic energy of particles in a liquid?
A, B, C, and H
A, C, D, and G
B, E, F, and H
B, C, F, and G
Answer:
b,c,f,g
Explanation:
it makes the most sense plus i just took the test <3 good luck
With an increase in the kinetic energy of the solid molecule the intermolecular bonds become weaker, temperature increases, melting and molecules vibrating faster are changes.
What is the effect of the increased kinetic energy?Kinetic energy is the form of the energy that is present in an entity in motion. When the kinetic energy is increased then the temperature of the particles increases and leads to evaporation.
The increased kinetic energy weakens the intermolecular bonds of the liquid particles and the molecules of the particles start vibrating fast.
Therefore, option b. intermolecular bonds become weak, option e. evaporation, option f. temperature increases and option h. molecules vibrate faster are the changes.
Learn more about kinetic energy here:
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How is the division of animal/human cells different from the division of plant cells?
HELP ASAP!!!
can someone help be determine the formulas for reactants and products as well as balance the equation, and what type of reaction is presented!!!!
I will make you the brain list!!!
Answer: owa owa
Explanation: owa owa owa owa
If a 60-g object has a volume of 30cm3 what is its density
Answer:
2 g/cm3
Explanation:
Density is a measure of a substance's mass over its volume.
d = m/v
Therefore d = 60g/30cm3 = 2 g/cm3
Identify the product(s) of the following reaction:
H
2
2
CO
3
3
→ H
2
2
O + CO
2
2
A
H
2
2
CO
3
3
B
H
2
2
and O
3
3
C
H
2
2
O and CO
2
2
D
O and O
2
2
Answer:
H20
Explanation:
means water but might not help
I am a celestial body that does not produce light. I orbit a planet
5.25 ml of substance A has a mass of 3.9 g and 6.24 ml of substance B has a mass of 4.4 g. Which liquid is more dense?
Answer:
A is more dense
Explanation:
The is because you can find the density of anything by dividing the Mass by volume A is .7428 and B is .7051 . There fore A is denser .
someone help ,, I'll give brainliest lol .
Answer:
D.
Explanation:
Hopefully this helps
Answer:
A
Explanation:
I think the correct answer is A. Online it says that oxidation can be defined in terms of the adding or removing oxygen to a compound/Oxidation is the gain of oxygen.
Copper carbonate decomposes to make _____________ oxide and _____________ dioxide
Answer:
Copper carbonate decomposes to copper oxide and carbon dioxide.
Explanation:
write importance of magnesium metal
Answer:
can be used in fireworks, flares and sparklers
Explanation:
as it burns in air it ignites with bright light
What molecules would you expect to find in air
Answer:
The air in the atmosphere consists of nitrogen, oxygen, which is the life-sustaining substance for animals and humans, carbon dioxide, water vapour and small amounts of other elements (argon, neon, etc.). Higher in the atmosphere air also contains ozone, helium and hydrogen.
Explanation:
Answer:
nitrogen, oxygen, carbon dioxide, water vapour, ozone, helium, and hydrogen.
Explanation:
hey guys, i found this marble outside and covered in grease. so i took it in to wash it. can you please tell me what it is made of...plz
Answer:
I can't see the marble so I don't know
What causes adaptions to occur ?
Factors that influence general adaptation syndrome include that of a person’s health, nutrition, sex, ages, race, socioeconomic status, and genetics. These are factors that are either can precipitate a different reaction, while others are modifiable and unmodifiable traits.
In biology, adaptation has 3 related meanings. Firstly, it is the dynamic evolutionary process that fits organisms to their environment, enhancing their evolutionary fitness. Secondly, it is a state reached by the population during that process. Thirdly, it is a phenotypic trait or adaptive trait, with a functional role in each organism, that is maintained and has evolved through natural selection. Historically, adaptation has been described from the time of the ancient Greek philosophers such as Empedocles and Aristotle. In 18th and 19th century natural theology, adaptation was taken as evidence for the existence of a deity. Charles Darwin proposed instead that it was explained by natural selection. Adaptation is related to biological fitness, which governs the rate of evolution as measured by a change in gene frequencies. Often, two or more species co-adapt and co-evolve as they develop adaptations that interlock with those of the other species, such as with flowering plants and pollinating insects. In mimicry, species evolve to resemble other species; in Müllerian mimicry, this is a mutually beneficial co-evolution as each of a group of strongly defended species (such as wasps able to sting) come to advertise their defenses in the same way. Features evolved for one purpose may be co-opted for a different one, as when the insulating feathers of dinosaurs were co-opted for bird flight. Adaptation is a major topic in the philosophy of biology, as it concerns function and purpose (teleology). Some biologists try to avoid terms that imply purpose in adaptation, not least because it suggests a deity's intentions, but others note that adaptation is necessarily purposeful.
What are the % composition for Carbon and Hydrogen in C3H6?
Answer:
Carbon=about 85.13%
Hydrogen=about 14.26%
Explanation:
Percent composition= (molar mass of element x amount of it)/Molar mass x100
C= 12x3/42.08 x100=about 85.13
H=6x1/42.08 =about 14.26