Biology College

what is the mass of 3.57 x 10^24 molecules of Ca(No3)2 ?

Answers

Answer 1

50.3 g

Explanation:

Start by converting the number of molecules of methanol to moles by using Avogadro's constant.

9.45

⋅

molecules CH

⋅

Avogadro's constant



1 mole CH

6.022

⋅

molecules CH

15.69 moles CH

Now, in order to go from moles to grams, you need to use the molar mass of the compound, i.e. the mass of exactly

mole of methanol.

Use the molar mass as a conversion factor to get

15.69

moles CH

⋅

32.04 g

mole CH

50.3 g

−−−−−

The answer is rounded to three sig figs, the number of sig figs you have for the number of molecules present in the sample.

Related Questions

how does molecules get to cells in the body

Answers

Answer:

Atoms make up molecules; molecules make up cells; cells make up tissues; and two or more kinds of tissues working together make an organ. An organ is a part of the body that performs a specialized physiologic function.

Explanation:

define analogous structure and provide an example

Answers

Analogous structures are structures that are similar in unrelated organisms. The structures are similar because they evolved to do the same job, not because they were inherited from a common ancestor. For example, the wings of bats and birds, shown in Figure below, look similar on the outside.

Similar features in unrelated organisms are referred to as analogous structures. These structures are comparable not because they have a shared ancestor but because they accomplish the same task. Sharks and dolphins, for instance, even though they are unrelated, both have fins.

What is an analogous and homologous structure?Analogous structures, as opposed to homologous structures, are traits of different species that evolved in response to a similar environmental challenge and are similar in function but not necessarily in structure.An insect's wings and a bird's wings are similar in structure. Although each of these species utilise their wings to fly, the origins of their wings are different.Analogous organs have comparable functions, while homologous tissues share a similar embryonic origin.For instance, the bones in a human arm and a whale's front flipper are anatomically similar.The constructions here are not comparable. A butterfly's wings and a bird's wings are analogous but not homologous

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Which feature on its head has a structure that enables the animal to eat its
food? Sea lion
A. Eyes
B. Nose
C. Mouth
D.whiskers

Answers

Sea lion eat using whiskers.

Marine creatures known as sea lions are frequently spotted along ports and coasts all over the world. They are trained for tasks and frequently used in shows due to their high intelligence.Sea lions hunt by diving under the water and using their vibrissae to look for fish. Excellent predators, sea lions catch and consume several fish each day. Their vibrissae are one of the greatest weapons sea lions utilize when hunting. Long hairs called vigrissae that surround the mouth are frequently referred to as whiskers.As carnivores, sea lions eat clams, hake, squid, crabs, and octopus. They are predatory marine animals that only eat marine life. They are coastal-dwelling creatures that pursue their prey using wits and swimming prowess.

Therefore, option D. is correct.

Learn more about whiskers:

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One hundred percent of Peruvian Indians tested have blood type O. How can this type be so prevalent if it is based on the presence of two recessive alleles (ii)?

Answers

Answer:

Due to the presence of dominant allele.

Explanation:

This type of blood is prevalent even if two recessive alleles are present because the allele of blood type O is dominant as compared to other two recessive allele. Due to dominance of the blood type O, the blood type of next generation will also be type O. we know that only the dominant allele will appear in the offspring so that's why the Peruvian Indians have blood type O.

What best describes a Gene pool

Answers

Answer:

A Gene pool is best described as, all the alleles present in an population.

Explanation:

A study was
picked up was related to the number of dry cells connected to the
electromagnet. The magnet, connected to 1, 2, 3, 4, or 5 D cells, was
placed on the top of a pile of 100 paper clips and lifted. Identify the
factor(s) that should be held constant. *

Answers

free points hehehe

Explanation:

nshvbs7 susans shsbbsbs she s s s

Natural selection is BEST described as

Answers

Answer:

not know

Explanation:

When interspecific interactions lead to competitive exclusion, the weaker competitor is forced to retreat to a more restricted niche (its realized niche) than it otherwise would inhabit in the absence of the competition (its fundamental niche). This is what happens between Balanus and Chthamalus

Answers

Answer:

The places where the species can thrive principally because of its characteristics is known as the fundamental niche, on the other hand, the place where the species is living is known as the realized niche. In the intertidal region, the species Balanus and Chthamalus compete for space. In comparison, Balanus is a bigger barnacle that can colonize the place more effectively than Chthamalus.

This competition for space makes Chthamalus displace into higher regions where water is not the same as in lower levels. The fundamental niche of Chthamalus comprises both lower and higher levels, while the realized niche for Chthamalus is the higher levels. In case, if the competition with Balanus was non-existent, the Chthamalus would occupy the lower levels.

If shaded symbols indicate having a dominant trait, what must be the genotype of the father in this pedigree chart?

Answers

Answer: The father must have a hetero'zygous genotype since both his offspring show the recessive trait even though he shows a dominant trait!

Answer:

Heterozygous

Explanation:

The offspring both carry recessive genes. The recessive gene will show up more often if one of the parents are heterozygous of the gene along with the other having recessive.

If the father was had both of the dominant traits, the offspring would inherit his trait instead.

PLEASE HELP! WILL GIVE BRAINLIEST!

Answers

A which country had the most cases of tbt

a. Poland
b. Switzerland

cells increase in size during?

Answers

Answer:

mitosis

Explanation:

The increase in size and changes in shape of a developing organism depend on the increase in the number and size of cells that make up the individual. Increase in cell number occurs by a precise cellular reproductive mechanism called mitosis

PLEASE HELP IN ONE MINUTE WILL MARK BRAINLIST

Answers

Answer:

The answer for this is density.

Explanation:

Hope this helps you <3

A cell is dropped into a salt water solution and shrivels up you infer that compared to the cell the type of salt water solution is

Answers

Answer: hypertonic solution

Explanation:

A cell placed in a salty solution would lose water as water will move from the cell to the surrounding hypertonic medium by the process of osmosis causing the cell to shrivel up.

During translation, the ribosome moves in which direction relative to the ends of the mRNA?

Answers

Answer:

The translation is affected by ribosomes moving along mRNA in the 5′ → 3′ direction. A set of tRNA molecules brings amino acids to the moving ribosome, their anticodons binding to codons exposed on the ribosome.

I hope this helps

what are 5 things that are needed for an idea to be scientifically reliable?

Answers

The five components of the scientific method are: observations, questions, hypothesis, methods and results. Following the scientific method procedure not only ensures that the experiment can be repeated by other researchers, but also that the results garnered can be accepted.

Answer:The five components of the scientific method are: observations, questions, hypothesis, methods and results.

Explanation:Following the scientific method procedure not only ensures that the experiment can be repeated by other researchers, but also that the results garnered can be accepted.

What chemical found in plant cells is able to use the energy in sunlight to make food?
a. cytoplasm
b. chlorophyll
c. lactic acid
d. sulfuric acid

Answers

Answer:

chlorophyll (b) is the chemical found in plant cells

Chlorophyll(option b)
Mark as brainliest pls

Explanation: chlorophyll gives a green texture to plants which is not needed in animals also chlorophyll helps plants to absorb energy from the sun as they undergo the process of photosynthesis

in which direction do striped bass migrate in the winter

Answers

Answer:

south

Explanation:

Striped bass will tolerate water Temps in the mid 40s and are one of the last species to migrate south to their winter grounds

Answer:

Striped Bass migrate south in the winter.

Explanation:

Answer the lab question, "What is the effect of the
inheritance of one trait on the inheritance of a
second trait?" with a hypothesis. Remember that
you can either assume that the two genes are
independent or that they are linked. What results
would you expect in either case?
Hypothesis:

Answers

Answer:

Sample Hypothesis: If a mouse inherits a particular form of one trait, then the inheritance of the other trait will not be affected because alleles assort independently.

Explanation:

The Sample for edge

Answer:

Sample Hypothesis: If a mouse inherits a particular form of one trait, then the inheritance of the other trait will not be affected because alleles assort independently.

Explanation: Sample hypothesis on edge 2020

1. What do you expect to happen if you increase the amount of greenhouse gasses in the atmosphere?

Answers

When you increase the amount of greenhouse gas in the atmosphere, it produces a warming effect that causes the global temperature to rise.

Becky has been asked to provide an example of how carbon is converted from a living form to a non-living form.
Which example should she use?
O Carbon dioxide in the atmosphere is absorbed by an ocean.
O Sugar in animals is converted into carbon dioxide during cellular respiration
O Calcium carbonate in rocks is converted into sediment through weathering
O Carbon dioxide from the air is converted into sugars during photosynthesis.

Answers

Answer:

Carbon dioxide in plants is converted into sugars during photosynthesis

Explanation:

An example of how carbon is converted from a living form to a non-living form is as follows: sugar in animals is converted into carbon dioxide during cellular respiration.

CELLULAR RESPIRATION:Cellular respiration is the metabolic process whereby living organisms obtain energy by breaking down food molecules in their cells.

During cellular respiration in animals, the sugar (living form) obtained from food molecules is oxidized and broken down into carbon dioxide, which is released into the atmosphere (non-living form).

Therefore, an example of how carbon is converted from a living form to a non-living form is as follows: sugar in animals is converted into carbon dioxide during cellular respiration.

Learn more about cellular respiration at: https://brainly.com/question/12671790

What must happen for most areas on Earth to experience all four seasons?
•The Sun must reach its highest point in the sky.
•The Northern Hemisphere must experience winter.
•The axis must be tilted at a certain angle that."
remains unchanged.
•The north end of Earth's axis must always point away from the Sun.
HELP ON TIMER

Answers

Answer:

The correct answer is - The axis must be tilted at a certain angle that." remains unchanged.

Explanation:

On the earth there ae many seasons but there are four major season, winter, summer, spring and autumn. The main reason that leads to all four season is the tilt of the sun at a specific angle that remain unchanged which leads to change in the distance to the sun at specific time of the year which result in different rays of sun the part. So, whatever hemisphere or part tilted towards the sun leads to different season for instance:

North pole tilted towards the sun - summer in northern hemisphere

south pole tilted towards the sun - winter in northern hemisphere

Answer:

The axis must be tilted at a certain angle that remains unchanged.

Explanation:

C on the test review. Good luck with your test/quiz/test review!

Tanyia
If the sperm of a boa constrictor has 18 chromosomes, how many chromosomes will each skin cell of the snake have?

Answers

Answer:

18 chromosomes

Explanation:

If the sperm of a boa constrictor has 18 chromosomes, the number of chromosomes that each skin cell of the snake will have is 36 chromosomes.

What is meiosis?

Meiosis is the process of gamete formation where each daughter cell or gamete contains half the number for f chromosomes as the parent cell.

According to this question, the sperm of a boa constrictor has 18 chromosomes. The sperm is a gamete formed as a result of meiosis.

Therefore, If the sperm of a boa constrictor has 18 chromosomes, the number of chromosomes that each skin cell of the snake will have is (18 × 2) = 36 chromosomes.

Learn more about meiosis at: https://brainly.com/question/1596925

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Heat can ONLY be transferred between two items that are touching. Read the question above. Based on what you learned, tell me if this statement is true/false
(this is science btw)

Answers

It’s true because when 2 objects touch one is higher temperature and the other is lower temperature and the higher temperature transfer heat to the other temperature

ATP is a(1 point)

storable form of energy.
usable form of energy.
form of energy that can be used and stored.
form of energy that can be stored and released as heat.

Answers

Hello there!

Your answer should be ATP is a stored form of energy.

You see, Think of it as the “energy currency” of the cell. If a cell needs to spend energy to accomplish a task, the ATP molecule splits off one of its three phosphates, becoming ADP (Adenosine di-phosphate) + phosphate. The energy holding that phosphate molecule is now released and available to do work for the cell. Hope this works!

Answer:

a storable form of energy

Explanation:

HURRY PLEASEE IM TIMEDD. Which correctly describes an organelle and its function?

An endoplasmic reticulum breaks down waste and other materials in the cell.
A Golgi apparatus packages and transports materials out of the cell.
Ribosomes help produce, process, and transport proteins inside the cell.
Lysosomes break down sugar molecules in order to supply energy to the cell.

Answers

the second sentence is correct if you mean lipids and proteins as 'materials'

Plz answer this!!!!!!!!!!!

Answers

Cast fossil!!!!!!!!!!!

which type of chemical change will produce ash A.burning B.melting C.rotting D.rusting help please

Answers

burning i think because when you burn a paper it turns to ash

Giving BRIANLIEST PLZ HELP AND ANSWER ASAP!

Answers

Answer:
I believe that the answer is Pulley #1

Explanation:

Have a nice day :D

The total number of genes in the human genome is___?

Answers

Answer:

thirty thousand (30,000)

Explanation:

estimated 30,000 Gene's in the the human genome

hi guys I need help with those questions can somebody help me please am doing a science fair project

the problem is CAN PLANTS STOP SOIL EROSION?

what can we put a title for this problem
what is the hypothesis for this problem

please help

Answers

Answer:Name for project.SOIL SAVERS. plants can stop soil erosion because the roots in plants keep the soil intack. this has already proven true by scientists and farmers. planting plants that has a large root system keeps more soil in. planting carrots and potatoes does not help keep the soil still because they have small root system.

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