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 LIKE RIGHT NOW!!
Answer:
Can't be answered without the lab.
Is steel wool + fire = Iron Oxide a chemical reaction
Answer:
Steel wool + fire = Iron oxide is a chemical reaction
Which statement is false when describing magnetism and electricity
A Magnetism and electricity both use electrons
B Magnetism and electricity do not generate fields
C Magnetism and electricity are non-contact forces
D Magnetism and electricity are related forces
Answer:
The correct answer is D
Explanation:
Hope this helped
Which option is an example of a chemical property?
melting point
density
ability to decompose
color
BRAINLIEST IF CORRECT
Answer:
indeed!
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.
Pick the correct relationship between magnetic poles
A North poles attract both like and opposite poles
B South poles attract both like and opposite poles
C Opposite poles repel while like poles attract
D Like poles repel while opposite poles attract
Answer:
D
Explanation:
All magnets have north and south poles. Opposite poles are attracted to each other, while the same poles repel each other. When you rub a piece of iron along a magnet, the north-seeking poles of the atoms in the iron line up in the same direction. The force generated by the aligned atoms creates a magnetic field.
BRAINLIEST IF CORRECT
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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please help me before june 13th
Place the following items in the correct order to show how a voice could be recorded and saved using a digital device.
Answer:
1. person sings
2. sound converted into signals
3. sounds converted into ones and zeros
4. the digital pattern
5. the analog
Explanation:
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:
Where is a magnet the strongest?
Answer:
North and South pole
Explanation:
Magnets are usually made of metal. They repel and attract other metal. A magnet's force is strongest at its north and south poles. Each magnet is surrounded by lines of force and a magnetic field.
What adaptation helps the cactus survive in warm climates?
Round leaves that capture sunlight
Thick stems that store water
Spines that reduce water loss
I and II
I and III
II and III
I, II, and III
Answer:
B) I and III
Explanation:
Round leaves that capture sunlight.
Spines that reduce water loss.
In self heating cans, the chemicals in two compartments react with each other and forms……..
calcium hydroxide : chemicals are Quicklime and water
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
BRAINLIEST IF CORRECT
Answer:
The answer is the first three
Explanation:
I had this question and got it correct
Answer:
a b c
Explanation:
(100 point question)
Which of the following is an example of transmutation?
Answer:3
Explanation:
Answer:
The answer is 3
What adaptation of vines help them grow on other plants in order to get more sunlight?
a plant growing on a tree trunk
Flexible stems
Large leaves
Strong roots
Thick bark
Answer:
Flexible stems
Explanation:
Due to a vine's flexible stems, it finds a strong plant to grow on, slowly growing around it to get nutrience and light from the spot. without it, it would just sit on the forest floor.
Which of the following is the only contact force?
A Gravity
B Applied
C Magnetism
D Electricity
Answer:
Explanation:
Free point SHEEEEEEEEEEEEEEEEEEEESH how you like it
What is the molarity of a solution that contains 50.0g of NaOH (molar mass = 40 grams/mole) in 2.0L of solution?
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:
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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BRAINLIEST IF CORRECT
Answer
its physical adaptions
4. Which of the following is a solution? *
Answer:
chemistry- A homogeneous mixture
a solution is also something to solve a problem
BRAINLIEST IF CORRECT
Answer:
Digital recordings
Explanation:
Digital recordings are just better because one: you don't have to wait a long time for the music. It's like streaming movies, but for music.
You can download digital recordings.
You can share digital recordings using social media or text messages.
if max has a blood type AB and ava is pure bread blood type A, What is the chance their child will have blood type A, B, AB, O
Which statement best describes how increased predators affect the organisms in an area?
There will be fewer prey for other predators.
There will be more prey for all predators.
There will be reduced space for other predators.
There will be a lack of water for all predators.
The first one.
There will be fewer prey for other predators
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:
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.
How do animals react to a change of environment when food and water become scarce?
They compete for sunlight.
They find more prey.
They grow in number.
They move to new locations.