Answer:
AlCl₃.
Explanation:
Adding solute to water causes depression of the boiling point.
The depression in freezing point (ΔTf) can be calculated using the relation:
ΔTf = i.Kf.m,
where, ΔTf is the depression in freezing point.
i is the van 't Hoff factor.
van 't Hoff factor is the ratio between the actual concentration of particles produced when the substance is dissolved and the concentration of a substance as calculated from its mass. For most non-electrolytes dissolved in water, the van 't Hoff factor is essentially 1.
Kf is the molal depression constant of water.
m is the molality of the solution (m = 1.0 m, for all solutions).
(1) NaCl:
i for NaCl = no. of particles produced when the substance is dissolved/no. of original particle = 2/1 = 2.
∴ ΔTb for (NaCl) = i.Kb.m = (2)(Kf)(1.0 m) = 2(Kf).
(2) MgCl₂:
i for MgCl₂ = no. of particles produced when the substance is dissolved/no. of original particle = 3/1 = 3.
∴ ΔTb for (MgCl₂) = i.Kb.m = (3)(Kf)(1.0 m) = 3(Kf).
(3) NaCl:
i for KBr = no. of particles produced when the substance is dissolved/no. of original particle = 2/1 = 2.
∴ ΔTb for (KBr) = i.Kb.m = (2)(Kf)(1.0 m) = 2(Kf).
(4) AlCl₃:
i for AlCl₃ = no. of particles produced when the substance is dissolved/no. of original particle = 4/1 = 4.
∴ ΔTb for (CoCl₃) = i.Kb.m = (4)(Kf)(1.0 m) = 4(Kf).
So, the ionic compound will lower the freezing point the most is: AlCl₃
please help me
Select items from the list below that are NOT characteristics of invasive species. Hint: there are four (4).
A. only plants
B. only animals
C. can be plants or animals
D. harmful to ecosystems
E. support biodiversity in ecosystems
F. have unique adaptations
G. come from the local environment
H. come from other parts of the world
I. introduced intentionally
J. introduced by accident
(100 point question)
Which of the following is an example of transmutation?
Answer:3
Explanation:
Answer:
The answer is 3
BRAINLIEST IF CORRECT (put them in order)
Answer:
what grade are you in and i think it is D
Explanation:
Answer:
1 a person sings into a microphone
2 the sound is converted into an electrical signal
3 the analog signal is converted into a digital signal made of many samples of the digital sound
4 the samples of the sound is converted into 1s and 0s
5 the digital pattern is converted to a medium such as a hard disk or flash drive
Explanation:
Which of the following statements are true? (There are 2)
A compass needle is affected by Earth's magnetic field.
A magnetic field flows though the inside of a magnet.
Materials such as wood and plastic can become magnetized.
Electrons are responsible for generating magnetic fields.
Answer:
A and B
Explanation:
the other two make no sense at all
BRAINLIEST IF CORRECT
Answer:
The answer is the first three
Explanation:
I had this question and got it correct
Answer:
a b c
Explanation:
PLEASE HELP ME LIKE RIGHT NOW!!
Answer:
Can't be answered without the lab.
What adaptations allow a camel and a cactus to survive in warm environments?
A camel has long legs, while a cactus grows deep roots.
A camel has thick fur as a body covering, while a cactus has a waxy coating.
A camel stores fat in its hump, while the cactus stores water in its thick stem.
A camel travels long distances in sunshine, while a cactus grows in the shade.
Answer:
A camel stores fat in its hump, while the cactus stores water in its thick stem.
Explanation:
Marine organisms trying to live in the water may not get enough oxygen to survive. Based on this description, which of the following is true?
A.
The supply of any nonliving factor supports or limits growth of all organisms in an ecosystem in the same way.
B.
The number of organisms of each type in an ecosystem depends on living factors but not on nonliving factors.
C.
Living factors, such as the number of producers present, play the largest role in the survival of organisms in an ecosystem.
D.
Nonliving factors, such as the amount of nutrients available, significantly affect the survival of organisms in their environment.
Answer:
D.
Explanation:
The example of the Gulf Coast dead zone suggests that nonliving factors, such as the amount of nutrients available, significantly affect the survival of organisms in their environment.
Most organisms that were living on or near the ocean floor near the Gulf Coast dead zone could not survive in such low levels of oxygen and either moved to new areas or died off. Scientists are concerned with the size and rapid growth of the dead zone. Preventing the overuse of fertilizers and chemicals that allow excess nutrients to enter the water can help reduce the size of the dead zone.
What environmental change happens when the number of prey in a certain area decreases?
Climate change
Increased predators
Pollution
Reduced space
Question:
What environmental change happens when the number of prey in a certain area decreases?
Answer:
C) Pollution.
In an ecosystem, there is an increase in the number of predators when the number of prey in a certain area decreases.
What is an ecosystem?Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.
Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.
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What type of adaptation does seaweed have that allows it to survive and grow in underwater environments?
Learned behavior
Inherited behavior
Physical characteristic
Life cycle difference
BRAINLIEST IF CORRECT
Answer
its physical adaptions
PLSSS HELLLPPP MEEEE PLSSSS
BRAINLIEST IF CORRECT
Explanation:
Traveling in herds helps fight off predators, since there is strength in numbers. It's only when a deer is separated from the herd is when that animal is in trouble, and has a higher chance of getting eaten.
Males fighting for females is an example of survival of the fittest, so to speak. The female deer decides which male is the strongest which in turn helps pass on strong genes to the next generation.
Both of these traits help lead to successful reproduction and helps the species overall.
Hey guys im gonna fail if i dont get these answer theses question right pls help me science is so hard
Answer:
Answer choice A
Please mark brainliest
PLEASE HELP ME WITH THIS!!!
You have been given an unknown plastic. You investigate and find out that the unknown plastic sinks in water but floats on dish soap.
Which plastic do you have?
A. PET
B. HDPE
C. PVC
D. PS
Answer:
D:PS
Explanation:
Looking at the table we can see that PS floats on dish soap and sinks in water.
What is the molarity of a solution that contains 50.0g of NaOH (molar mass = 40 grams/mole) in 2.0L of solution?
ANSWER ASAP PLEASE
According to this table, which star has the highest absolute brightness?
a. Betelgeuse
b. Rigel
c. Bellatrix
Answer:
B. Rigel
Explanation:
BRAINLIEST IF CORRECT
Answer:
1 a person sings into a microphone
2 the sound is converted into an electrical signal
3 the analog signal is converted into a digital signal made of many samples of the digital sound
4 the samples of the sound is converted into 1s and 0s
5 the digital pattern is converted to a medium such as a hard disk or flash drive
Explanation:
Is steel wool + fire = Iron Oxide a chemical reaction
Answer:
Steel wool + fire = Iron oxide is a chemical reaction
BRAINLY IF CORRECT
Select an animal from that you may know about and explain how physical and behavioral adaptations increase the chances of successful reproduction. Use evidence and scientific reasoning to support your response.
The cheetah (Acinonyx jubatus) will be the subject of my discussion. Cheetahs are the world's fastest land mammals, and they have evolved in both physical and behavioural ways to improve their chances of having offspring.
What is the behavior of A Cheetah ?First off, cheetahs have a highly effective circulatory system that includes bigger hearts and lungs, as well as a surplus of capillaries and red blood cells to carry oxygen to their muscles. This gives them the ability to pursue prey at speeds of up to 75 mph, increasing their likelihood of catching it and providing food for themselves and their young.
Second, cheetahs have a distinctive fur pattern that makes it simpler for them to blend into their surroundings and sneak up on their prey.and draw near enough for an effective assault. They can sprint rapidly and effectively because to their long legs and big feet.
Last but not least, cheetahs have a variety of behavioural modifications that improve their chances of having offspring. For instance, they create social groupings where the mothers look after the babies while the males go food hunting and guard the young from predators.
They also have a strong sense of smell that allows them to detect potential prey from far away. They get an edge in hunting and have a better probability of feeding their offspring as a result. In summary, cheetahs have a variety of morphological and behavioural adaptations that raise their likelihood of having offspring. Among these modifications is an extremely effective cardiovascular system.
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