17 Free Homework Help Websites for Math, Coding, Chemistry, Music, Languages, and English

homework help websites

Are you drowning in homework?

Finding a reliable and trustworthy homework help website is not always easy.

But by the time you finish reading this article, my goal is for you to have some valid homework help options in place.

I’ve put together a list of homework help websites that are free to access and easy to use.

There’s just one thing.

None of them involve interacting with people.

Now don’t get me wrong!

Passively interacting with a website can be helpful, and these homework help websites are LEGIT.

I’m taking a pretty liberal approach to this term homework help.

Contract cheating companies offer homework help and so does the Khan Academy, but these are vastly different approaches to your homework.

Of course, any type of homework help will succeed to a limited extent.

However, sometimes it is easier to start a chat with someone when you really want to learn something.

Or maybe you just want answers. In which case it would be fastest to click the button below.

Get Answers Now

The content you will find below is organized in two ways.

First, you can also view the resources organized by a little secret of Internet marketers called a DA (domain authority) score.

Every website gets a DA score from 0-100. Twitter is 100. A freshly minted blog will be somewhere between 0-5.

Think of it like a digital popularity contest where bots get to decide who wins.

The number depends on a website’s ability to offer valuable targeted content to its users.

This will help you judge the TRUE value of the website you’re considering and not just the hype.

homework help websites

Second, I take into account the kind of homework help resource offered. For example, is this homework help website intended for learning, giving answers, or offering resources?

This question really matters since all of the websites below give homework help.

Let’s get off to the organized list.

Homework Help Websites for Learning

YouTube | DA: 100

YouTube gets tremendous gamer and entertainment traffic, but it turns out that YouTube has some practical learning applications too.

Because of the amazing and entertaining education channels. Chemistry with Melissa Maribel, Patrick JMT, and Physics Girl are but a few of the world class online educators.

The keyword emphasis there is “entertaining.” Their job is to entertain you first, and if they educate you too that’s great.

If you want to learn on YT, it will be way more efficient to search for specific terms than browse by channel.

Wikihow | DA: 92

Wikihow is in-depth and step-by-step, but don’t expect all of the questions to be educational.

Sure, you can get help solving quadratic equations. And you can also get help with how to kiss in a car.

Either way, Wikihow will give you graphically designed no-BS straight to the point answers.

Green check marks on the article mean the answer has been reviewed by an expert with a doctorate, and the most of the content gets edited by at least 23 people.

Khan Academy | DA: 91

Everyone knows about the Khan Academy.

What some people don’t know is that they have an app for 2-5 year olds.

If you’re a gamer, KA works great as it measures energy points and lets you earn badges.

homework help websites

Besides their fame for math and science, KA also has art videos of professors discussing famous paintings at museums.

KA enjoys a second to none reputation in expanding a world education to everyone for free.

But you won’t get answers from them.

Codecademy | DA: 87

If you want to learn coding for free, you can use the entire Codecademy site for 7 days.

After that, the site will force you to convert into a paid user.

You’ve been warned!

Languages to learn include HTML & CSS, Python, JavaScript, Java, SQL, Bash/Shell, Ruby, and C++. You’ll find world-class content here.

Sparknotes | DA: 81

If you haven’t heard of Sparknotes, you just discovered the most powerfully useful English Literature resource on the Internet.

They serve way too many ads, but they know their stuff and deliver detailed content about popular literature works.

Their fantastic No Fear Shakespeare resource places the original 16th-17th century text alongside modern translations.

That makes it a whole lot easier to understand.

Duolingo | DA: 81

Duolingo offers free AI-based learning for complimenting your language studies in class.

Don’t expect it to singlehandedly supplement your classwork in the given language since it can’t be customized to fit in specific vocab words.

But you CAN focus specific language areas like phrases, plurals, and vocabulary areas (food, home, etc.).

I haven’t found a way to focus on specific parts of grammar.

Instead, it will measure your competency and then put you through its program based on how you test.

Ableton Learning Music | DA: 69

The beauty of Ableton comes its extremely interactive interface.

You can click everything. This website is a free candy store for making sound.

Best of all, you immediately hear the music. This way there is no chance that the concept will get lost in abstract terminology.

homework help websites

It’s also easy to click through the site without understanding what is happening.

Be prepared to play with this site to help master something specific like chord inversions and you will do well.

Anki | DA: 55

Anki works as a series of flashcards to help you memorize the topics that you are trying to learn.

You can make your own flashcards.

There are also free flashcards, and this option works best for foreign language and science (especially pre-med) students.

The app costs $25, but you can use it for free on your laptop.

Honestly, I bought the app and I don’t think it is worth it since I never study on my phone.

Homework Help Website Answers

Reddit | DA: 98

The r/HomeworkHelp subreddit serves lots of answers.

The mods specifically ban “do this for me” posts, but I still see many direct questions.

This is definitely worth a shot if you have something basic and straightforward to offer.

Quora | DA: 92

The following pages have strong followings on Quora and are listed in order of popularity:

  1. Mathematics Homework Questions
  2. Homework Questions
  3. Chemistry Homework Questions

Quorans tend to be a little snarky about giving away answers, but there are people there who want to help.

Even better than Reddit, you can check their account to see their background.

Like YouTube, I would recommend to search by your question.

The search algorithm is tougher to use than YT, but with some key word alterations you should be able to find what you’re looking for.

Wolfram Alpha | DA: 86

Stuck on an equation? Wolfram Alpha covers math as well as science and technology, society and culture, and everyday life.

Think Wikipedia for Math and you get how this site works.

The designers of Wolfram Alpha do a terrific job. The site offers facts, numbers, and dates in as few words as possible.

However, this is a paid service if you are looking for work shown.

Homework Help Website Resources

Google Scholar | DA: 91

Google scholar helps you find the articles that you want later on in their full form (see Sci-hub).

I highly recommend showing results based on date of publication and sorting by relevance.

Many teachers don’t like sources that are older than five years.

Once you find what you want, make sure to copy+paste that DOI somewhere.

Grammarly | DA: 77

Grammarly will edit your paper for the following:

  • Spelling
  • Grammar
  • Punctuation
  • Conciseness
  • Formality
  • Sentence Variety

It will even tell you if you plagiarized portions of the paper.

homework help websites

However, the plagiarism checker is not as accurate as Turnitin since it does not check other papers and journal articles.

The editing, however, works at a high quality level.

Sci-Hub | DA: 55

Sci-hub is a Russian website that lets you download academic papers for free.

It’s also controversial because it mass distributes paid content.

So will you get in trouble for using this? In the USA, the copyright owner can sue (typically for money damages or injunctive relief) an infringer.

The criminal laws are aimed at the reproducer and/or distributor, however.

Also, according to Pablo Markin at Open Science, publishing company Elsevier got blocked in Sweden after it legally required internet service providers to make Sci-Hub locally inaccessible.

Why use Sci-hub in the first place? Speed and fairness.

If you have the DOI of an article, you can usually find it 10x faster on Sci-hub than you can on any online database.

If you consider that professors do not make any money off of the articles they publish anyway, using Sci-hub makes a lot of sense.

LibGen | DA: 55

Much of the above commentary on Sci-hub applies here.

Both websites originate in Russia.

Both offer users copyrighted content and mass distribute it.

In this case, the content consists of books, not articles. You’ll want the ISBN number ideally, but you can always use the title to find an alternate edition.

Besides saving money on your textbooks, Libgen contains access to millions of books you can get in PDF and EPUB formats.

Symbolab | DA: 49

This is a free graphing calculator if you don’t have yours or don’t own one.

It is also offered as an app for Android and iOS, which provides an additional layer of convenience.

They even give you a Cheat Sheet of formulas in Algebra, Trigonometry, Limits, Derivatives, and Integrals.

You can download it in PDF form: get the cheat sheet 🙌

MMSPhysChem Stoichiometry Calculator | DA: 28

This is the simplest site on the list, but that might make it one of the most directly useful too.

Look no further if you want help on stoichiometry calculations.

Redox reactions, limiting reactant problems, and chemical equations containing hydrates can not be solved using this system at this time.

So that’s it for my free options.

If you’re still wanting to truly deepen the grasp of your homework, Studygate can help with that.

homework help websites
The tools you need to succeed, right at your fingertips
  • Access 1,000 on-demand tutors. We sourced them to make sure they are experts in their fields.
  • Get 24/7 help since we’re here to provide homework help anytime, day or night.
  • Enjoy lightning-fast responses for homework help within minutes.
  • Relax with no subscription needed. Pay only for the help you need, when you need it.

You can get a tutor to chat about your homework and help answer your question directly. It’s that simple.

Need Homework Help? Click Here!

Please follow and like us:

How long will you live?

How long will you live? 10,000 years ago, the average human life lasted just over 30 years, and then a hundred years ago that number was up to 50. If you were born in the last few decades in the developed world, then your life expectancy is 80 years. But that is of course assuming that no major breakthroughs happen during your lifetime that can slow the process of aging.

That may be a very bad assumption.

According to Dr. Fiona Ginty, aging is not always recognized as a disease. There are plenty of diseases we do acknowledge like diabetes, heart disease, and Alzheimer’s. At their core, aging may be responsible for all of them.

And yet aging seems natural because it’s something that we do from birth and for a while it makes us better. Bigger, stronger, faster, more intelligent. But then at some point in your life it reverses and aging makes our bodies decay and degrade.

Why do we have to age?

Scientists are now realizing there is a fundamental cellular mechanism at the heart of aging. Do we age at the macroscopic level because our cells are aging at the microscopic level? To a great extent, yes. There’s only a finite number of times a cell will divide.

The key discovery was made by a biologist named Hayflick. He was studying normal human cells. He found that they can only divide a finite number of times, usually about 50. Beyond that, the cell becomes senescent, which means it’s an aged cell. It can divide no longer. It lives for a little while but it’s the accumulation of these senescent cells in our bodies that leads to aging on the macroscopic scale.

So it’s as though cells have this little timer inside them that tells them when to stop dividing. But how do they know, and what is that timer?

Telomeres

According to Dr. Ginty, “telomeres are like how your shoelaces have a little bit of plastic at the end to stop them from fraying.” So when your telomeres wear out, the chromosomes stop multiplying. When they work, they keep the chromosome together and stop them from sticking to other chromosomes. Dr. Ginty explains that every time a cell divides, it loses about 200 base pairs of telomere due to the mechanics of the action. “There’s only so much space when DNA polymerase does its job of replicating when it’s copying.”

So the telomere getting shorter is like your molecular clock. The cellular clock inside each cell that tells it how many times it has divided. Would you want to have your telomeres measured?

Well, we can at least lengthen our telomeres!

There have been associations made with lifestyle and exercise showing that longer telomeres are associated with a more active lifestyle.

If we could stop the telomeres from shortening, maybe the cells would live forever. There’s another enzyme involved called telomerase, and it keeps rebuilding.

Telomase

Telomase rebuilds the telomere, and there is one animal that doesn’t seem to age—the lobster. It just gets bigger over time. It doesn’t get weaker and its chromosomes don’t change. It has long telomeres that do not shorten, so it only dies when it gets eaten by something else like a human. So how can we be more like a lobster?

how long will you live? studygate

Well, that answer is a little complicated.

Unfortunately, cancer is a perfect example of telomerase being hyperactive. In the end, it becomes an unregulated growth situation. —This is the double-edged sword of telomeres and telomerase. Cancer cells have really long telomeres, and they can divide indefinitely, and that is the problem with cancer. Cancer is dividing cells that won’t stop and they won’t die. So, in a way, cancer is the immortal cell living within us.

So maybe we have telomeres that shorten for a very good reason; otherwise they could become cancerous. One of the theories there is that the cells divide that limited number of times because it stops them from accumulating damage that may be detrimental. Telomeres might stop cells from becoming cancerous.

Over the past hundred years, developments in medicine have increased human lifespan more than we could have imagined, and I can only expect that the next hundred years will bring similarly incredible results. I’m not sure where or how they will take place, but you can bet that your life expectancy today will not be the actual age at which you die.

Original content by Veritasium

Please follow and like us:

Homework Help: How to Calculate the Molar Mass of Na2Co3

molar mass of na2co3

Mary had a shorn a little lamb
Its fleece was filthy grey.
Mary had to scrub it clean.
For a sock on Mom’s birthday. 

She took it to an automat.
But wondered what to add.
Sodium carbonate will do the trick.
But adding too much was bad. 

So, Mary had to figure out
How many atomic grams to use.
To do this she drew up its molar mass
And started to deeply muse.

Let us learn here to find molar mass, specially with an example molar mass of Na2Co3. Molar mass is defined as its “gram-formula-mass.” In other words, molar mass is how much one mole of the substance weighs in terms of “atomic mass.” A mole is a number: 6.02×1023. Just like a dozen is 12, one mole is 602000000000000000000000. Scientists use moles as a base number so they can compare groups of atoms. Just as you can compare one carbon atom to one helium atom, you can compare one mole of carbon to one mole of helium.

*to abbreviate “mole,” just shorten it to “mol.” 

The larger the atom is, the heavier it weighs. This makes sense, right? Well, the periodic table is organized from smallest to largest, in which the number of protons and neutrons largely determine the weight (Atoms have electrons, but they are so small they weigh “nothing”).

Molar Mass of Na2Co3_Periodic Table

For example, in the top left corner, Hydrogen has one proton, one electron, and no neutrons. So it’s atomic number is One (for one proton) and its atomic weight is One (for one proton and one neutron)

hydrogen

One mole of hydrogen atoms will be its atomic weight. One mole of hydrogen atoms weighs One gram/mol.

The next one is helium, which has two protons and two neutrons. This means the atomic number is Two (for two protons) but the atomic weight of the atom is FOUR (two protons and two neutrons).

helium - learning molar mass

One mole of helium atoms weighs Four gram/mol.

**Here’s a quick tip, in the more common elements near the top of the chart, an atom’s protons and neutrons are “ideally” the same. So, the atomic weight is simply doubled the atomic number. Pretty easy, huh?

Na2Co3 is made up of two sodium atoms, one carbon atom, and three oxygen atoms. We know the number of each atom because the number of atoms per element is listed right after the symbol.

 

molar mass of na2co3_na2co3 structure

Let’s look at each atom:

2 Na

sodiumsodium

1 C

carbon

3 O

oxygenoxygenoxygen

Then, just add up the atomic weights of each:

(2 x 22.990) + (12.011) + (3 x 15.999) =

44.980 + 12.011 + 47.997 =

105.987 grams/mol

Looks like Little Mary has her work cut out for her! Keep in touch of expert tutors for a homework help.

Please follow and like us:

Chemistry Help: A Step-by-Step Guide to Balancing Chemical Equations

balancing chemical equations

Chemical reactions are the stuff of life. When we cook food, start a motor, or washing our hands in soap, we depend on chemical reactions. There are many types of reactions, but all of them have one thing in common. They have to be balanced.

What does “balance” mean?

It means that the charges on both sides of the equation must cancel out to be neutral.

An atom is made up of protons, neutrons, and electrons.

Protons have a positive charge (+)

Neutrons have no charge so we can forget about them for simplicity’s sake.

Electrons have a negative charge (-)

An atom looks like this:

balancing-chemical-equations-understanding-atom-structure

The nucleus, which is made up of protons and neutrons, has a positive charge, due to the protons. The number of orbiting electrons balances the number of protons so that an atom ideally is neither positive nor negative.

But if an atom LOSES an electron, that means the atom becomes positively charged. Look at the picture above. See how it has FOUR protons, FOUR neutrons, and THREE electrons? This breaks down to FOUR positive charges, FOUR neutrals, and THREE negatives. They cancel each other out, leaving ONE positive charge left. So this atom has a charge of +1.

If this atom GAINS an electron, it will have FOUR electrons to match the FOUR protons. Its charge will be ZERO.

If this atom GAINS TWO electrons, it will have FIVE electrons to the FOUR protons. Its charge will be -1.

An atom that gains or loses an electron is called an ION. An atom that LOSES an electron for a positive charge is called an CATION (pronounced cat-ion). An atom that GAINS an electron for a negative charge is called an ANION (pronounced an-ion).

With me so far? Okay, now let’s look at the periodic table.

 

balancing-chemical-equations-periodic-table

See how it’s color coded? The table is divided into metals and nonmetals (and metalloids, which mean they can be both, but we won’t worry about those).

Metals are purple and to the left (except for Hydrogen at the top). Metals tend to LOSE electrons to create positive charges.

The periodic table gives you a hint: the atoms at the extreme left lose ONE electron for a +1 charge. Li, Na, K, Rb, Cs, and Fr all lose ONE electron in a reaction. Their ions have a +1 charge.

The next column to the left tend to lose TWO electrons in a chemical reaction, for a +2 charge. Be, Mg, Ca, Sr, Ba, and Ra ions all have +2 charges.

We’ll leave the shorter stacks out for now. Those ions’ charges vary.

On the right side are the non-metals. These are gases like helium and nitrogen, liquids like chlorine and iodine, and substances like sulfur. The non-metals are tricky.

That is because many of these elements exist in molecules consisting of 2 atoms. Oxygen gas exists as O2. Nitrogen gas exists as N2. Liquid chlorine is Cl2.

Tip: We do not have to worry about the extreme right. They are ALWAYS balanced. He, Ne, Ar, Kr, Xe, and Rn generally do not react with anything. They are also found in molecules of 2: He2, Xe2, etc. These are called “noble gases” because they do not react.

In a chemical reaction, many of these molecules break up into individual anions. These anions have a negative charge. The column to the left of the noble gases GAINS ONE electron. F, Cl, Br, and I anions have a -1 charge. The next column gains TWO electrons: O, S, and Se anions have a -2 charge. In the next column, Nitrogen (N) has a -3 charge.

There are 2 exceptions. Carbon (C) can either gain or lose electrons. Way over on the left hand side, Hydrogen (H) ALWAYS loses its electrons for a +1 charge. That is why it is placed with Li and other positive ions. 

So, let’s recap all this:

Metals: always LOSE electrons for ions with positive charges.

Non-metals: mostly GAIN electrons for anions with negative charges. Many non-metals have a pure state of TWO atoms joined together: H2, F2, S2, etc.

Take a  breather—this is where the fun begins!

Let’s put it together with some basic chemical reactions.

Balancing Chemical Equations Example #1

Common table salt has a chemical label of NaCl. That means it has one Sodium (Na+1) cation and one Chlorine (Cl-1) anion.

How do we make salt? We just join the two atoms. Na is in the far left column, which means it LOSES ONE electron. Cl is in the non-metal column that GAINS one electron. So the two are a perfect fit. This is why salt is so common and cheap!

 

balancing-chemical-equations_NaCl

Na+1+ Cl-1->NaCl.

Now to make it more complicated.

Remember how Cl only exists in a pure state as two atoms joined together? Cl2. What happens to the other Cl atom? It needs to gain an electron. The easiest solution is to add another Na+1cation for it to hook up with. So, our formula now reads:

2Na+1 + Cl2 -> 2NaCl

Note the placement of the 2. NaCl is a balanced formula, so we can’t change it to read anything else (NaCl2 would imply that one molecule of salt has two chlorine atoms for one sodium atom and this is not correct. The ratio is 1:1.Na2Cl2 is also incorrect because one molecule has two Na and two Cl, while in reality each molecule only has one). But we have to account for every atom and for every charge. The Na atoms have a +1 charge each. When we break up Cl2, each Cl anion has -1 charge each. Placed together, these positive and negative charges cancel each other out and each atom is accounted for.

**(There are some other things we can add to the equation, such as the presence of heat that is released during the reaction, and that these reactions take place in solutions, but that’s getting ahead of the game).

Balancing Chemical Equations Example #2

Think you got it? Let’s try something else: Magnesium Bromide.

Balancing-Chemical-Equations-Magnesium-Bromide

 

Magnesium cation is in the second to left column, so it has a +2 charge.

Bromine is in the second to right column, so it has a -1 charge.

Technically, you can write:

Mg+2 + 2Br-1 -> MgBr2.

Even though we need 2 Br atoms to cancel the +2 positive charge on Mg, we have to remember that Bromine does not exist as individual atoms in a natural state. Like Chlorine, Bromine’s natural state is two atoms joined together as Br2.

So the right answer is:

Mg+2 + Br2 -> MgBr2.

Balancing Chemical Equations Example #3

How about water? We all know this one: H2O!

O gains 2 electrons while each H loses one electron. We know we need two Hydrogen atoms for each Oxygen atom.

H2 + O -> H2O

Well, not quite.

Hydrogen loses atoms, so it has a positive charge. It also exists as an H2 molecule in its natural state, so we’re okay there.

But Oxygen also exists as O2in its natural state. We need to account for the extra O!

Let’s put it together:

H2 + O2 -> H2O

Almost there! We need another O on the right to balance the number of Os on the left. We can’t write the final equation as H2O2 because one molecule of water only has one oxygen atom and we would be stuck with an extra -2 charge because of the second O. (It would look like H2O2-2 YIKES!). We can simply add an extra water molecule altogether:

H2 + O2 -> 2H2O

Now we have TWO Oxygen atoms on each side. But now we have FOUR Hydrogens on the right (TWO molecules of water, each with TWO hydrogens). How can we balance the FOUR on the right and TWO on the left?

Add another Hydrogen molecule:

2H2 + O2 -> 2H2O

Now everything matches up: Four Hydrogen and Two Oxygen atoms on each side. This is balanced!

Balancing Chemical Equations Example #4

Want something really horrible to try?!?

Let’s start with a balanced formula: HSO3

Let’s break this down. Hold on to your hat!

We know H has a +1 charge. That means SO3has a -1 charge altogether.

We’ll keep SO3 intact for this equation. It’s pretty hard to break up this molecule (for reasons that are too complex to get into for now. ).

So, what is HSO3 good for, anyway, you ask? It helps soften your water!

Hard water is the presence of Calcium (Ca), or Calcium chloride (CaCl2) which is left behind when water dries. It clogs your drains and leaves deposits on your pans. You need to get rid of Ca and Cl in a filtration system.

This will be in two steps.

●Drop a resin ball containing HSO3 in your tank. (We’ll ignore the presence of water in the equation). Let’s see what happens. The resin ball will extract calcium from water by swapping it out with the Hydrogen from the SO3.

Ca+2 + HSO3 -> ???

SO3 has a -1 charge, while Ca has a +2 charge. So, we need two SO3 for each Ca. ->Ca(So3)2

The Ca swaps out for the H atom, freeing it in the water.

Ca+2 + HSO3 -> Ca(So3)2 + 2H+

Balance out the number of S, O, and H atoms on the left

Ca+2 + 2HSO3 -> Ca(So3)2 + H2(remember hydrogen in its natural state)

We have 1 Ca, 2 H, 2 S, and 6 O atoms on each side!

That takes care of the calcium!

●Now, what about the chlorine in CaCl2? We need to get rid of that element as well.

Let’s drop another resin ball in our pool of water, made up of NaOH. Na has a +1 charge, while OH has a -1 charge (remember that O has a -2 charge while H has a +1 charge).

NaOH+ Cl-> NaCl + OH

NaCl should look familiar—it’s table salt, from our first example!

Final step is pretty easy. The excess H+ atoms swapped out from the first resin ball and the OH- molecules from the second resin ball will join together and form water in your pool!
H+ + OH-> H2O.

OR, more correctly:

H2 + (OH)2 -> 2H2O

Our final reaction, putting both resin balls in the same pool:

CaCl2 + HSO3 + NaOH->Ca(SO3)2 + NaCl + H2O

Now balance out the number of atoms on each side:

CaCl2 + 2HSO3 + 2NaOH -> Ca(SO3)2 + 2NaCl + 2H2O

Compare the numbers to make sure:

1 Ca; 2 Cl, 2 S; 2 Na; 8 O; 4 H -> 1 Ca, 2 S; 2 Na; 2 Cl; 4H; 8 O

Congrats, all the salt from the water are extracted and are stored in the resin balls. In exchange, we created more pure water released into your pool!Bravo!

Please follow and like us: