What does a number in front of a molecular formula stand for???????please I have a test Rn

Answers

Answer 1

Answer:

the amount of times you have to multiply it

Explanation: ex: CONa2

multiply Na by to (2x2)


Related Questions

FLVS people there was a question that I was double checking and it was wrong even though it was expert verified!
The Question was:
What evidence supports a conservation law?

Energy from sunlight becomes glucose during photosynthesis.

Carbon dioxide becomes glucose and oxygen during photosynthesis.

Hydrogen is made from the breakdown of carbon dioxide during photosynthesis.

Glucose and oxygen become carbon dioxide and water during photosynthesis.
The correct answer is A)
Energy from sunlight becomes glucose during photosynthesis.

Answers

Answer:ok

Explanation:

Answer:

Energy from sunlight becomes glucose during photosynthesis.

Explanation:

Help plzzzzzzzzzzzzzzz

Answers

Answer:

B) they make the spindle fibers

Explanation:

Answer : Ibelieve it’s to store food not sure but I think so



Which of the following do plant cells have, but animal cells do not have?

Answers

Answer:

Animal cells each have a centrosome and lysosomes, whereas plant cells do not. Plant cells have a cell wall, chloroplasts and other specialized plastids, and a large central vacuole, whereas animal cells do not.

When humans dig-up fossil fuels and burn them to power the modern world, carbon flows between which two reservoirs of the carbon cycle? * A. Hydrosphere and biosphere B. Geosphere/lithosphere and atmosphere C. Atmosphere and biosphere D. Hydrosphere and geosphere/lithosphere

Answers

Answer:

B

Explanation:

When humans dig-up fossil fuels and burn them to power the modern world, carbon flows between the Geosphere/lithosphere and the atmosphere.

Both the geosphere and the atmosphere represent important reservoirs of carbon. The digging-up of fossil fuels, otherwise known as exploration, is carried out in the geosphere or the lithosphere part of the earth. For example, crude oil is obtained deep from the ground. When the fuels are burned, they release carbon in the form of carbon dioxide into the atmosphere.

Hence, it can be concluded that carbon flows from the geosphere/lithosphere part of the earth to the atmospheric portion of the earth when fossil fuels are burned.

The correct option is B.


A group of two or more organs that work together to perform a specific function.

A. Cell
B. Tissue
C. Organ System

Answers

C. Organ System


Like said in the definition above, an organ system is a group of organs working together to perform a specific function for the organism.



hope this helps !! have a great day :))

Could you help me figure this out?​

Answers

The cilia serve to transport dust and other foreign particles, trapped inmucous, to the back of the nasal cavity and to the pharynx. There the mucus iseither coughed out, or swallowed and digested by powerful stomach acids. After passing through the nasal cavity, the air flows down the pharynx to thelarynx.

4 ( 3x+10y=54 and x=y+5 )

Answers

Answer:

x−y=9 , x+y=6

4x+4y=1

, 6x−y=1

x2−y=2

, 2x−y=−1

Explanation:

What is one difference between natural selection and artificial selection?
a)Natural selection involves humans; artificial selection does not involve humans
b)Natural selection does not involve humans; artificial selection involves humans
c)Natural selection takes longer than artificial selection
d (Artificial selection only involves plants; Natural selection only involves animals​

Answers

Answer:

B

Explanation:

Natural selection and selective breeding can cause changes in animals and plants. The difference between the two is that natural selection happens naturally, but selective breeding only occurs when humans intervene. For this reason, selective breeding is sometimes called artificial selection.

Can you list some facts about Food webs.

Answers

Answer:

A hawk eats a snake, which has eaten a frog, which has eaten a grasshopper, which has eaten grass.

Explanation: A food web consists of all the food chains in a single ecosystem. Each living thing in an ecosystem is part of multiple food chains. Each food chain is one possible path that energy and nutrients may take as they move through the ecosystem.

A food web is where is constants all food chains that are in a single echosystem

How many times did a heart beat a minute

Answers

Answer:

60-100 bpm (beats per minute)

Explanation:

The normal resting heart rate for adults ranges from 60-100 beats per minute.

(Giving brainliest!)
Chose which question you want to solve!!

1. What are the differences and similarities between an asteroids and comets?

or

2.What are the differences and similarities between the moon and a planet?

Answers

Answer:

Asteroids or planetoids are small solids in planetary systems. They usually orbit the parent star in their own orbit or as natural satellites (moons) of larger planets.

A comet is a celestial body that is in an elliptical orbit around the Sun. They come from the farthest and coldest areas of the solar system.

Explanation:

The moon is the only natural satellite of the Earth and at the same time the closest celestial body.

It is the brightest celestial body in the night sky, not because it consists of incandescent gases like the sun, but because it reflects sunlight.

A planet is a celestial body that moves directly in an elliptical orbit around a star, not like a natural satellite, which orbits a star while circling around another body.

Where is the albedo effect the greatest?

a. Africa

b. Australia

c. Europe

d. Antarctica

Answers

D is your answer D: Antarctica
Answer:
A. Africa


Step-by-step explanation:

Here on Earth, the albedo effect has a significant impact on our climate. The lower the albedo, the more radiation from the Sun that gets absorbed by the planet, and temperatures will rise. If the albedo is higher, and the Earth is more reflective, more of the radiation is returned to space, and the planet cools.

Where are most mountains on Earth fomed?

Answers

Answer:

asia

Explanation:

Answer:

Mountains are most often formed by movement of the tectonic plates in the Earth's crust. Great mountain ranges like the Himalayas often form along the boundaries of these plates. Tectonic plates move very slowly.

Explanation:

Should the thruster fire exert force in the same direction or opposite direction to bring the Pod to a stop? Explain.

Answers

Answer: Explain the claim : Firing the thrusters would have caused the pod to move in the opposite direction. The pod would have had to have a lighter mass meaning a smaller amount of force would have had to be exerted onto the pod making it move in the opposite direction.

Explanation:

A _____ is any push or pull in a direction.


1. force

2. inertia

3. friction

4. velocity

Answers

Answer:

1. force

Explanation:

A force is any push or pull in a direction.

the answer is, force.

Multiple choice!!!
Long term environmental change to an area is likely to create selective pressure that will
A. mutate the genetic makeup of organisms

B. influence adaptations of populations over time.

C. cause a decrease in reproductive rates.

B. allow organisms to select the best adaptations.

Answers

The answer is b. Influence adaptation of populations over time

Which of the following is NOT a structure that is similar in the embryological development of humans, fish, lizards, and birds

Gills
Tail
Spinal cords
Feathers

Answers

Feathers I am pretty sure
the answer is feathers

Which pharmacological treatment would help a patient with GERD the most?
o anti-inflammatories
antidiarrheals
antibiotics
antacids

Answers

Answer:

Antacids

Explanation:

I took the test and I got it right ✅

The pharmacological treatment would help a patient with GERD the most is antacids as o anti-inflammatories cannot be used.

What is GERD ?

A digestive disorder wherein belly acid or bile irritates the meals pipe lining.

Aantacids  sellers have emerge as the medication of preference for GERD. Both proton pump inhibitors (PPIs) and histamine H2-receptor antagonists (H2-RA) are powerful and may be properly used to deal with GERD.

Read more about the GERD  here :

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Identify the statement below that is NOT a principle of evolution. O Populations evolve, individuals do not O Negative adaptations will become more common in a population O Variations occur naturally within a population Adaptations help individuals compete successfully for survival

Answers

Answer:

Negative adaptations will become more common in a population

Explanation:

that's the one that is NOT a principle

Negative adaptations will become more common in a population is NOT a principle of evolution.

what is population ?

A discrete accumulation  identifiable characteristics such as people, animals with the objective of analysis and data collection is called a population.

A population consists of a same group of species who reside in a particular geographical place with their reproductive capacity to interbreed.

In a population Not all individuals are able to survive and reproduce due to genetic variations in them, a local population is  restricted to a smaller area or can occupy a larger area, making up for the entire species.

when individuals in local populations spread between other local populations called as metapopulation.

For more details regarding population, visit

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Which characteristics do birds and mammals share? Check all that apply.

Both give birth to live young.
Both are endotherms.
Both have hair or fur.
Both produce milk to feed their young.
Both are vertebrates.

Answers

Answer:

Extant birds and mammals share a number of highly similar characteristics, including but not limited to, enhanced hearing, vocal communication, endothermy, insulation, shivering, respiratory turbinates, high basal metabolism, grinding, sustained activity, four-chambered heart, high blood pressure, and intensive ...

An endotherm is an organism that uses internal body heat to maintain a metabolically suitable temperature rather than relying on ambient heat. The endotherms primarily include the birds and mammals.

Why are birds and mammals endotherm?

In contrast to organisms that rely on the heat of their surroundings to sustain a temperature that is optimal for their metabolic processes, endotherms generate their own heat from within their bodies. The majority of endotherms are comprised of different kinds of birds and animals.

Endotherms, which include birds and mammals, generate and store a significant amount of heat within their own tissues, as opposed to ectotherms, which include insects and reptiles, who take in heat from their surroundings. Insects and reptiles are examples of ectotherms.

Learn more about endotherm organisms, here:

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What two characteristics define an air mass?

Answers

Answer:

What two main characteristics are used to classify air masses? Temperature and humidity are two characteristics used to classify air masses.

is the mass of wood charcoal and oxygen the same before and after the fire ?

Answers

Answer:

Here u go I even looked it up for u ;)

The law of conservation of mass was created in 1789 by a French chemist, Antoine Lavoisier. ... For example, when wood burns, the mass of the soot, ashes, and gases, equals the original mass of the charcoal and the oxygen when it first reacted. So the mass of the product equals the mass of the reactant

please help me....... ​

Answers

Answer:

13. cytoplasm

6. microscope

7. tissue

5.organ system

15. organ

What environment would be least likely to grow bacteria and why? Here are your choices:
1. The armpit of a human
2. A warm freshwater mud puddle
3. A classroom desktop

Answers

Answer:

3.

Explanation:

A classroom desktop is the least likely to grow bacteria because it is a relatively clean surface. The armpit of a human and a warm freshwater mud puddle are a more suitable habitat for bacteria because they are warm, and provide a relatively safe environment for them

The study of the environment is called ecology.

The correct answer to the question is C which is a classroom desktop.

What is bacteria?Bacteria are ubiquitous, mostly free-living organisms often consisting of one biological cell. They constitute a large domain of prokaryotic microorganisms. Typically a few micrometers in length, bacteria were among the first life forms to appear on Earth, and are present in most of its habitats

According to the question, A classroom desktop is the least likely to grow bacteria because it is a relatively clean surface.

The armpit of a human and a warm freshwater mud puddle is a more suitable habitat for bacteria because they are warm, and provide a relatively safe environment for them

Hence, the correct answer is option 3.

For more information about the bacteria, refer to the link:-

https://brainly.com/question/14688752

Insect 1 : Vespula flavopilosa
Insect 2: Vespula rufa
Insect 3: Callicera rufa

(a) Insects 1 and 2 are more closely related to each other than to insect 3.
(i)Explain how the binomial names indicate that insects 1 and 2 are more closely related.
(i)Explain how the appearance of the three inswcts suggest that insects 1 and 2 are more closely related.

HELPPP I NEED TO KNOW NOWWWW!!

Answers

Note:

In the attached files you will find the image of the three insects

Answer:

(i) Because they share the same genera, Vespula.

(ii) Because Morphologically, insects 1 and 2 are more alike than insect 3.

Explanation:

(i) Explain how the binomial names indicate that insects 1 and 2 are more closely related.

In taxonomy, many categories are used to aggregate organisms according to their evolutive relationship. These are Domain, Kindom, Clase, Order, Family, Genera, Species, Subspecies. All species might be recognized by their common name and their scientific name, which is more reliable. The binomial names of living beings indicate the scientific name by which the organisms can be recognized. A species scientific name is composed of two parts:

- Generic name or genera: correspond to many species that share common characteristics. In the example, Vespula is the genera

- Specific epithet: useful to identify each species in particular and differentiate organisms that are included in the same superior taxes. In the example, flavopilosa and rufa are the epithets that differentiate one species from the other.

According to this, we might assume that species 1 and 2 are more closely related because they share the same genera: Vespula. This suggests that they share more characteristics in common with each other than with Callicera.

(ii) Explain how the appearance of the three insects suggests that insects 1 and 2 are more closely related.

Morphologically, insects 1 and 2 are more alike than insect 3. Traits such as body shape, pigmentation pattern, antenna, wings, total body size, among others, are very similar in species 1 and 2. On contrary, species 3 is smaller, with a thinner antenna, different pigmentation patterns, different wings size and shape.

Cognition is studied indirectly. Please select the best answer from the choices provided T F

Answers

Pretty sure it’s True.. but I could be wrong

The statement "Cognition is studied indirectly" is true.

What is cognition?

The mental action or process of obtaining psychological features and apprehension through self-satisfaction, experience, and the senses is the definition of cognition.

Cognitive psychologists are interested in the investigation of mental functions. This relates to the study of cognition, memory, learning, and problem-solving processes in people. Cognitive psychologists are interested in how people think or react psychologically to various situations.

On the other side, behavioral psychologists are interested in researching and observing behavior. It is additional research on the interactions between stimulants and outcomes.

Therefore, the statement is true about cognition.

To learn more about cognition, refer to the below link:

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What are some methods that predators use to capture prey?

Answers

Some use Camouflage or Scent

Answer:

Offensive Strategies of Predators

Cheetahs use speed to outrun their prey, and eagles, hawks, owls and falcons use flight to their advantage while hunting. Venomous snakes, spiders and wasps use poisons to either kill or immobilize their prey. Some predators even use mimicry to capture prey.

In rabbits, straight ears (E) are dominant to floppy ears (e), Two rabbits are crossed, and 50% of their offspring have floppy ears. Which cross represents the
genotypes of the parents?
EEXEE
EE x ee
Ee x EE
Ee x ee

Answers

Answer: Ee x ee

Explanation:

Answer:

The correct answer is Ee x ee :)

Explanation:

The brain is most active during which portion of each sleep cycle?
A. the beginning of each sleep cycle
B. the middle of each sleep cycle
C. the end of each sleep cycle
D. The brain is not active during the sleep cycle.
Please select the best answer from the choices provided
Ο Α

Answers

Answer:

b i think

Explanation:

I believe it’s B bye have a nice day

Which term is defined as the sum of the potential energy and the kinetic energy in a system?
Click the answer you think is right.
mechanical energy
thermal energy
potential energy
Kinetic energy

Answers

Answer:

in physical science, mechanical energy is the sum of potential energy and kinetic energy. it is the macroscopic energy issues associated with a system

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