What Is H20???????????????????? (2023)

Chemistry Middle School


Answer 1


H2O is the chemical formula for water or in simple language its is water


Answer 2


it is water, the formula that makes it up. hygrogen and oxygen

Related Questions

What is the equilibrium expression for the reatcion bellow





How many grams of PbBr2 will precipitate when excess CrBr; solution is added to 60.0 mL of 0.551 M Pb(NO3)2 solution? 3Pb(NO3)2(aq) + 2CrBr3(aq) –>3PbBrz(s) + 2Cr(NO3)(aq)​



5.48 g


M: 367.01

3Pb(NO3)2(aq) + 2CrBr3(aq) → 3PbBr2(s) + 2Cr(NO3)3(aq)

1. Moles of Pb(NO3)2

n = 30.0 mL × (0.551 mmol/1 mL) = 16.53 mmol Pb(NO3)2

2. Moles of PbBr2

n = 16.53 mmol Pb(NO3)2 × (3 mmol PbBr/3 mol Pb(NO3)2)

= 16.53 mmol PbBr2

(3) Mass of PbBr2 formed

m = 16.53 mmol × (367.01 mg/1 mol) = 6067 mg

(4) Mass of PbBr2 in solution

PbBr2 is slightly soluble, so a significant amount will remain in solution.

Its solubility is 973 mg/100 mL.

Mass of dissolved PbBr2 = 60.0 mL × 973 mg/100 mL = 584 mg

(5) Mass of precipitate

Mass of precipitate = mass of PbBr2 formed - mass of PbBr2 in solution

m = 6067 mg - 584 mg = 5480 mg = 5.48 g

The mass of precipitate is 5.48 g.

The mass of PbBr2 precipitate produced is 12.1 g.

The equation of the reaction is;

3Pb(NO3)2(aq) + 2CrBr3(aq) –>3PbBr2(s) + 2Cr(NO3)3(aq)​

Number of moles of Pb(NO3)2 = 60.0/1000 L × 0.551 M = 0.0331 moles

From the information in the question, we already know that Pb(NO3)2 is the limiting reactant and CrBr3 is the reactant in excess.

From the equation of the reaction;

3 moles of Pb(NO3) yields 3 moles of PbBr2

0.0331 moles of Pb(NO3) yields 0.0331 moles × 3 moles/3 moles

= 0.0331 moles of PbBr2

Mass of PbBr2 = number of moles × molar mass

Mass of PbBr2 = 0.0331 moles × 367 g/mol= 12.1 g

Learn more: brainly.com/question/17083843

(Video) Molecule Profile: H20 - Water

Which of the following statements is true? Question 5 options: Nuclear decay rates vary with the conditions of the reaction, but chemical reaction rates do not. Neither chemical reaction rates nor nuclear decay rates vary with the conditions of the reaction. Both chemical reaction rates and nuclear decay rates vary with the conditions of the reaction. Chemical reaction rates vary with the conditions of the reaction, but nuclear decay rates do not


Answer: I believe its a Chemical reaction rates vary with the conditions of the change, but nuclear decay rates do not.


(As) in noble-has notion



[Ar] 4s2 3d10 4p3


Arsenic is Element 33. It is the 15th element in the Fourth Row, following the noble gas Ar at the end of the Third Row.

Thus, its noble gas electron configuration is

[Ar] 4s2 3d10 4p3

A drought is a long period of dryness. If animals fight during a drought, which basic need is most likely limited? water supply shelter or space the ability to reproduce the availability of sunlight



Water supply


When there is drought, which happens mostly within the tropics, water sources go dry. Plants and animals suffer alike. Animals have to scramble for the limited amount of water to quench their thirsts. Water is one of the basic requirements for the survival of living organisms like animals.


water supply


How many mass of chlorine molecule are found in 5 x 10^22 molecules of chlorine gas?​


Mass in gram/molecular mass=no.of molecule of Cl2 gas/Avogadro’s number(NA) - - - - - - - - -(1)
Molecular mass of cl2=35.5*2=71
No.of cl2 molecule=5*10^22
Avogadro’s number(NA)=6.032*10^23
Now,substituting these all value in equation one,we get,
Mass in gram =(no.of molecule)/NA)*molecular mass
Or,Mass in gram =(5*10^22/6.023*10^23)*71
Or,Mass in gram = 5.89gm.Ans

All combustion reactions are redox reactions.
True or false





A combustion reaction is a burning process that occurs in the presence of an oxidant and a fuel. It is usually an energy releasing procedure in which the temperature of the environment is greater than that of the reactants.

Not all combustion reactions are redox reactions

In a redox reaction, one specie is oxidized and the other becomes reduced simultaneously.

Redox reactions are usually facilitated by the transfer of electron. One specie loses electrons to be gained by another specie.

Certain atoms in a combustion reaction will have to change their oxidation state.

During combustion, during combustion reaction, there is no transfer of electrons between reactants . None of the molecules changes oxidation state. For example;

CH₄ + 2O₂ → CO₂ + 2H₂O

The algebraic sum of all oxidation number of all atoms in a neutral compound is zero.

In the reaction above, all the atoms in going from reactants to products have a net oxidation number of zero.

carbon on both sides is 0

oxygen is 0

Hydrogen is 0

So there is no transfer electrons

Answer : The given statement is false.

(Video) What is Water? What is H2O? || ENGLISH ||

Explanation :

Combustion reaction : It is defined as a chemical reaction in which a hydrocarbon react with oxygen to give product as carbon dioxide and water.

It is represented as,

Redox reaction or Oxidation-reduction reaction : It is defined as the reaction in which the oxidation and reduction reaction takes place simultaneously.

Oxidation reaction : It is defined as the reaction in which a substance looses its electrons. In this, oxidation state of an element increases.

Reduction reaction : It is defined as the reaction in which a substance gains electrons. In this, oxidation state of an element decreases.

In redox reaction, transfer of electrons takes place.

As per question, all combustion reactions are not redox reactions because in combustion reaction, oxidation and reduction reaction does not takes place. That means, the oxidation state of individual elements present on reactant side are same as the elements present on product side.

Hence, the given statement is false.

Which experiment led to the idea that atoms contained a nucleus


Answer: A Ernest Rutherfords gold foil experiment


Alpha-ray scattering experiment or Rutherford alpha-ray experiment.

H3BO3, HCNO, HCN, HF which of them has the strongest acid​



I believe it's HF


Answer: A. HF Explanation:(Ka for HF is 7.2X10^-4)

Consider the proportionality below. PV ont
What does this best represent?
Dalton's law
Charles's law
ideal gas law
combined gas law



Ideal gas law


The expression is the ideal gas law when properly written;

PV = nRT

where P is the pressure of the gas

V is the volume of the gas

n is the number of moles of the gas

R is the gas constant

T is the temperature

The ideal gas law is derieved from the three major gas laws;

--- Boyle's law, Charles's law and Avogadro's law


C) ideal gas law


Which equation is used to help form the combined gas law?



The ideal gas equation


The ideal gas equation is derived from the combination of three gas laws:

  • Boyle's law
  • Charles's law
  • Avogadro's law.

The ideal gas law is expressed mathematically as: PV=nRT where:

P is pressure

V is volume

(Video) IS WATER WHAT THEY SAY IT IS? Could WATER Really Be The CAUSE Of Your DEHYDRATION? #YahkiAwakened

n is the number of moles

R is the ideal gas law

T is temperature.

To obtain the combined gas law, we assume that n=1 and this gives:

= R



6. How to calculate the mass of copper that can be plated out of a 1.0 M Cu(NO3)2 solution using a current of 0.75 A for 5.0 minutes?



Approximately 0.074 grams.


  • Look up the relative atomic mass of copper on a modern periodic table: .
  • Look up the Faraday's Constant: . This constant gives the amount of electrical charge on each mole of electrons.

How does the electroplating works for copper? Copper exists as copper(II) ions in the copper(II) nitrate solution. It takes two moles of electrons to reduce one mole of copper(II) ions to metallic copper .

. (Reduction half of the ionic equation.)

What are the steps for finding the mass of copper that has been deposited.

Start by finding the charge on the electrons that have been supplied to this electrochemical cell. After that,

  • Find the number of moles of electrons that have been supplied based on the charge supplied;
  • Find the number of moles of copper that have been reduced based on the number of moles of electrons supplied; and
  • Find the mass of copper based on the number of moles of copper atoms reduced.

What's the charge on the electrons supplied to this electrochemical cell?

For a constant direct current , the charge that has been delivered in time is equal to


In case

  • is in Amperes and
  • is in seconds ,

will be in Coulombs (which is the same as .)

For this electrochemical cell,


How many moles of electrons were supplied to this electrochemical cell?

The Faraday's Constant gives the size of charge (in Coulombs) on one mole of electrons.



How many moles of copper atoms have been deposited?

Assume that copper(II) ions are in excess. Refer to the reduction half-equation, it takes two moles of electrons to deposit one mole of metallic copper.


. As a result,


What's the mass of that many copper atoms?

The Relative atomic mass of copper is .


The many phases of water


Answer: Solid, Liquid, Gas


Solid_ Ice

Liquid_ rtp (room temperature and pressure)

Gas_ Vapors

The many phases of water


Water has three phases, Liquid, Solid, and Gas.
Typically, you will see the Liquid form as water, you will see the Solid form as ice, and you will see the Gas form as steam.


Solid, Liquid, and Gas



Liquid_ rtp


If 1.216g of cobalt metal react with 0.495g of oxygen gas what is empirical formula of the cobalt oxide product

(Video) We Still Don’t Understand What Water Is, Here’s Why


First you divide each mass by the mass number of the element:

Cobalt 1.216 / 59 = 0.02

Oxygen 0.495 / 32 = 0.03

Then the result is divided by the lowest number:

Cobalt 0.02 / 0.02 = 1

Oxygen 0.03 / 0.02 = 1.5

After that you multiply with a number to obtain an integer number:

Cobalt 1 × 2 = 2

Oxygen 1.5 × 2 = 3

The empirical formula of the oxide:


Do respiration in cells releases energy or absorbs energy​


Energy is released during the reaction and is captured by the energy-carrying molecule ATP (adenosine triphosphate).

___________. Is a process that breaks water down into the gases hydrogen and oxygen​


The answer is electrolysis


Water electrolysis


Select the correct answer. How does activation energy affect a chemical reaction?
It increases the energy of the reactants.
It determines how difficult it is to start the reaction.
It determines how much product can form.
It decreases the energy of the products.


B. it determines how difficult it is to start the reaction


It determines how difficult it is to start the reaction.-B.

Clay and water make a ______

a. solution
c. colloid





4. A cylinder with a piston originally contains 5.0 L of He gas at a temperature of 310 K. When the gas is cooled the piston moves and the new volume is 2.4 L.
What is the final temperature of the gas assuming that pressure and the number of
moles of He remains constant?





volume is directly proportional to temperature

(Video) IAEA - What is water?

therefore p¹/T¹=P²/T²


What is the enough water? ›

You've probably heard the advice to drink eight glasses of water a day. That's easy to remember, and it's a reasonable goal. Most healthy people can stay hydrated by drinking water and other fluids whenever they feel thirsty. For some people, fewer than eight glasses a day might be enough.

Is 64 ounces enough water? ›

Drinking enough water each day is essential for maintaining good health. While the recommended daily intake can vary depending on factors such as age, sex, and activity level, a general guideline is to aim for at least 64 ounces of water per day.

How many glasses of h20 a day? ›

Here are some tips to help you make sure you are drinking enough fluids to maintain good levels of hydration. You are probably all aware of the “cardinal rule” that says adults should drink six to eight 8-ounce glasses of water per day.

Is 32 oz of water per day enough? ›

The National Academies of Science, Engineering and Medicine recommends the following for daily fluid intake: 125 ounces (3.7 liters) for men. 91 ounces (2.7 liters) for women.

How much water is not enough? ›

If you don't drink enough water each day, you risk becoming dehydrated. Warning signs of dehydration include weakness, low blood pressure, dizziness, confusion, or urine that's dark in color. So how much water should you drink? Most people need about four to six cups of water each day.

Do you drink enough water water enough? ›

The easiest way to know if you're drinking enough fluid is to look at the colour of your urine. If you're drinking enough water, your urine will be clear or pale yellow. A darker yellow means you aren't drinking enough water. People who drink enough water also usually have soft bowel movements.

Is half a gallon of water a day enough? ›

Health experts commonly recommend eight 8-ounce glasses, which equals about 2 liters, or half a gallon a day. This is called the 8×8 rule and is very easy to remember. However, some experts believe that you need to sip on water constantly throughout the day, even when you're not thirsty.

What is the healthiest water to drink? ›

Mineral, structured, and pure spring water are some of the healthiest water you can drink because they're clean and contain all the essential minerals your body needs. Filtered water removes contaminants but might also remove essential minerals.

Is it okay to drink a gallon of water a day? ›

Can drinking a gallon of water a day be harmful? For most people, there is really no limit for daily water intake and a gallon a day is not harmful. But for those who have congestive heart failure or end stage kidney disease, sometimes water needs to be restricted because the body can't process it correctly.

Does coffee count as water intake? ›

Here is one more reason to enjoy that morning cup of joe: “Coffee counts toward your daily water intake,” says Lauren DeWolf, MS, RD, a registered dietitian with Sharp Rees-Stealy Medical Centers. The water in coffee, tea and other caffeinated beverages helps us meet our daily fluid needs.

Is drinking a lot of water good for your kidneys? ›

Water helps the kidneys remove wastes from your blood in the form of urine. Water also helps keep your blood vessels open so that blood can travel freely to your kidneys, and deliver essential nutrients to them. But if you become dehydrated, then it is more difficult for this delivery system to work.

Is h20 water good or bad for you? ›

Many people tend to imagine that purity is the ultimate indicator of the quality of drinking water. However, 100% ultra-pure water is not good for our health because water (H2O) purely comprised of hydrogen and oxygen does not provide our body with the natural electrolytes and salts that we need to survive.

What happens when you start drinking enough water? ›

You'll feel less hungry and may even lose weight. You'll probably experience more comfortable digestion (less heartburn). Bowel movements might be easier and more regular. Your teeth and gums will be healthier and more resilient.

Why is drinking water first thing in the morning good for you? ›

Drinking water first thing in the morning flushes out the stomach and therefore balances the lymphatic system. A stable lymphatic system will help build a strong immune system, which will prevent us from getting sick as often.

What are signs of dehydration? ›

Symptoms of dehydration
  • dizziness or light-headedness.
  • headache.
  • tiredness.
  • dry mouth, lips and eyes.
  • passing small amounts of urine infrequently (less than three or four times a day)
Feb 13, 2023

What are signs you need to drink more water? ›

Here are the 10 most common signs you may not be getting enough water throughout the day.
  • Severe Headaches. ...
  • Muscle Cramps & Joint Pain. ...
  • Weight Gain. ...
  • Lack of Energy. ...
  • A Little Disoriented. ...
  • Dry Eyes, Mouth and Skin. ...
  • Indulging in Salty Foods. ...
  • Uncomfortable Stomach Pain.
Aug 8, 2017

How do you super hydrate your body? ›

6 tips for staying hydrated
  1. Don't wait till you're thirsty to drink. By the time you feel thirsty, you're already slightly dehydrated. ...
  2. Flavor your water. ...
  3. Eat water-rich fruits and vegetables. ...
  4. Stay inside when it gets too hot. ...
  5. Dress for the weather. ...
  6. Be aware of the signs of dehydration (below).
Feb 22, 2019

How can I hydrate fast? ›

If you're worried about your or someone else's hydration status, here are the 5 best ways to rehydrate quickly.
  1. Water. ...
  2. Coffee and tea. ...
  3. Skim and low fat milk. ...
  4. Fruits and vegetables. ...
  5. Oral hydration solutions.
Dec 19, 2019

Is it better to drink too much water or too little? ›

A large portion of the body is made of water, which is vital for cell function and life. Your body will alert you when it needs more water. When you drink too much, it can lead to fatal conditions. If you don't know how much water you should drink daily, stick to the popular advice of eight glasses a day.

What happens when you don't drink enough water? ›

Water also contributes to regular bowel function, optimal muscle performance, and clear, youthful-looking skin. However, failing to drink enough water can cause dehydration and adverse symptoms, including fatigue, headache, weakened immunity, and dry skin.

What happens when you dont drink enough water? ›

“If you don't get enough water, hard stools and constipation could be common side effects, along with abdominal pain and cramps.” Dull skin. Dehydration shows up on your face in the form of dry, ashy skin that seems less radiant, plump and elastic. Fatigue.

What happens when you start drinking a gallon of water a day? ›

No matter your typical energy level, better hydration could be the answer. In fact, fatigue and low energy are two of the most immediate symptoms of insufficient water intake. Drinking a gallon of water each day may help you sustain your energy and even sleep better at night.

What happens if you don't drink water for 5 days? ›

After three to five days of not drinking water, your organs begin to shut down, especially the brain, which could have lethal consequences including fainting, strokes and in extreme cases, even death.

Can drinking water help lose belly fat? ›

Sufficient water intake helps in flushing out toxins from the body and gives a boost to the metabolism. And drinking a glass or two of warm water in the morning can help you in losing weight and belly fat.

What is the best water for kidneys? ›

1. Mineral water. Without a doubt, the best drink you should be consuming in order to maintain good kidney health is mineral water. It is, after all, completely natural and packed full of vitamins and minerals vital to all organs in your body.

Which water hydrates the best? ›

Surprised? Plain water is the best way to hydrate, no second guessing necessary. And this stylish water bottle makes it easy to drink enough.

What is the cleanest bottled water? ›

In all seriousness, SmartWater is deemed as one of the best water bottle brands out there, enabling you to achieve ultimate hydration through a special vapor-distillation process that eradicates impurities. Essentially, this sort of system emulates the hydrologic cycle that makes water as pure as a drop of rain.

How much is too much water to drink in a day? ›

But how much water is too much? "Drinking more than the kidneys can eliminate could cause hyponatremia in some people," says Hultin, noting that the kidneys can eliminate 27 to 34 ounces of water per hour, or a total of 676 to 947 ounces (20 to 28 liters) per day. More than that might put you in the danger zone.

How long does it take for water to flush out toxins? ›

Liquids are rapidly absorbed into the bloodstream, and fluids in excess of the body's needs are eliminated via the kidneys as urine, much faster. Water absorption can occur as soon as 5 minutes after ingestion and peaks around 20 minutes after ingestion.

How much water should you drink a day to lose belly fat? ›

According to the studies, 1–2 liters of water per day is enough to assist with weight loss, especially when consumed before meals.

What can I drink instead of water? ›

Juice, smoothies, iced coffee, ice tea, protein shakes, milk, and other drinks can be excellent alternatives to water. You should avoid relying too much on drinks with a high sugar content, such as soda, certain fruit juces, energy drinks and chocolate milk.

Does Gatorade count as water? ›

While sports drinks can be counted toward your daily fluid intake, they aren't recommended as a go-to beverage.

Is soda more hydrating than water? ›

Some people may feel like they are getting hydrated after they drink a soda, but it is often due to the perceived boost they get from caffeine and carbohydrates in the soda. Sodas are mostly water, and the body does use that water as best it can to hydrate.

What color is urine when your kidneys are failing? ›

Light-brown or tea-colored urine can be a sign of kidney disease/failure or muscle breakdown.

Is lemon water good for your kidneys? ›

Lemons contain citrate, which helps prevent calcium from building up and forming stones in your kidneys. Interestingly, the benefit doesn't seem to be present in oranges, making lemon a unique tool in kidney stone prevention.

Is water good for high blood pressure? ›

Something as simple as keeping yourself hydrated by drinking six to eight glasses of water every day improves blood pressure. Water makes up 73% of the human heart,¹ so no other liquid is better at controlling blood pressure.

What is the difference between H2O and drinking water? ›

Answer and Explanation: There is no difference between water and H2O. Water's molecular structure and chemical formula is H2O. Two hydrogen molecules combines by covalent bonds with one oxygen molecule to form the H2O water molecule.

What is the healthiest name brand water? ›

Best Overall: Essentia Ionized Water

Essentia Water's ionized bottled water is an excellent product. It's safe, clean, tastes great, and has all the right certificates. It's a supercharged and ionized alkaline water that's filtered through a proprietary process that purifies Essentia's water, making it 99.9% pure.

Is bottled water the safest water? ›

In many areas, bottled water (BW) is considered safer than drinking water from the public supply. This is due to the public perception that environmental contamination affects the latter but is avoided in the former. However, this is unverified by directly comparing contaminants present in the two types of supply.

What is the best water level for drinking? ›

What is the best TDS level for drinking water? Ans: Generally, the TDS level between 50-150 is considered as the most suitable and acceptable. Ans: If the TDS level is about 1000 PPM, it is unsafe and unfit for human consumption.

What is the ideal drinking water level? ›

The U.S. Environmental Protection Agency recommends that the pH level of water sources should be at a pH measurement level between 6.5 to 8.5 on a scale that ranges from 0 to 14. The best pH of drinking water sits right in the middle at a 7.

What happens to your body if you dont drink enough water? ›

“If you don't get enough water, hard stools and constipation could be common side effects, along with abdominal pain and cramps.” Dull skin. Dehydration shows up on your face in the form of dry, ashy skin that seems less radiant, plump and elastic. Fatigue.

Which bottled water is the safest to drink? ›

What Are the Safest Bottled Waters to Drink?
  • Fiji. When tested against other bottles of water by a professional sommelier for aroma, taste, and texture, Fiji was rated high on the list of best-bottled water brands. ...
  • Smartwater. ...
  • Alexa Springs. ...
  • About the Safest Bottled Waters in Marketing.
Apr 1, 2023

What bottled water is actually tap water? ›

Most bottled water is actually tap water—about sixty four percent by some estimates. Many bottled water brands simply repackage tap water, and make a killing on it. Coca-Cola owns Dasani, PepsiCo owns Aquafina and LIFEWTR, Nestle owns PureLife and Poland Spring, among others.

What can I drink to hydrate besides water? ›

5 best drinks for dehydration besides water
  • Tea. Tea has the same hydration effect as water and is overloaded with antioxidants to help your ‎body get rid of toxins. ...
  • Fruits juice. ...
  • Vegetables juice. ...
  • Sparkling water. ...
  • Infused water.
Oct 24, 2018

What is the best water to drink for dehydration? ›

Electrolyte-Infused Water

Water with electrolytes. When you're dehydrated, you're depleted of electrolytes that help your kidneys function—drinks like Smartwater and Trader Joe's Alkaline Water Plus Electrolytes can come to the rescue and ward off a headache or other mild dehydration-related issues.

What is the proper way to drink water? ›

Sip water slowly than guzzling it down at once. Sipping water and allowing it to stay in the mouth and then passing through the food pipe helps the alkaline saliva reach the stomach to neutralise acid levels in the stomach.

How much water do you need a day? ›

But there are some basic guidelines: For men, the Institute of Medicine (IOM) recommends a total of 13 cups (about 3 liters) of fluid each day. For women, they suggest 9 cups (a little over 2 liters) of fluid each day. Pregnant women should drink about 10 cups of water daily.


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