There are 4.9875 mol C, 7.9802 mol H,
and 2.00 mol O in the sample.
Divide each by the smallest number of
moles. What is the ratio for the C?

[?] C [ ]H[ ]0

Answers

Answer 1

Answer:

So, in 1 mol there are 6.02x10^23 atoms, regardless of the susbtance, only the weight of the mol changes. Doing a simple rule of 3 we can get many of the answers to your questions.

Explanation:

1mol of Ar → 6.02x10^23 atoms

0.25 mol → X

So now what we do is (0.25mol * 6.02x10^23 atoms)/1 mol = X

That gives us 1.505x10^23 atoms in 0.25 mol of Ar.

For this I'm guessing you mean the stable form of oxygen, O2. The Avogadro constant stays well, constant.

1 mol of O2 → 6.02x10^23 molecules

1.0×10^-4 mol of O2 → X molecules

So you can do (1.0×10^-4 * 6.02x10^23) / 1mol = X

(I feel like this is homework, so i will help you, but not give you all the answer, will be good practice to try yourself) :)

For this you need to know the weight of a mol of Be. Luckily the periodic table gives us that number. The number under each element is the weight in grams of 1 mol .

Answer 2

Answer:

C- 2.48925 H- 3.9901 O- 1

Explanation:

Read the instructions


Related Questions

The density of lead is 11.3 g/mL. What is the mass of 45 mL of the metal?

Answers

Answer:

510g

Explanation:

45mL..

1mL

_____ = 510g

11.3g

Which of the following is NOT an example of pseudoscience?
A. Psychics
B. Healing crystals
C. Vaccines
D. Acupuncture

Answers

Answer:

I think its vaccines

Vaccines is the answer

Balance the equation in the space below for the reaction of ammonia and oxygen, using the smallest whole number coefficients
NH₂(g) + O₂(g) → N₂(g) + H₂O(g) + energy ​

Answers

The balanced equation of the reaction is:

2 NH₂(g) + O₂(g) → N₂(g) + 2 H₂O(g) + energy

What is a balanced equation of a reaction?

A balanced equation is an equation of a reaction in which the moles of atoms of elements in the reaction are equal on both sides of the equation.

The given equation can be balanced as follows:

2 NH₂(g) + O₂(g) → N₂(g) + 2 H₂O(g) + energy

Therefore, the balanced equation of the reaction is the one in which the moles atoms of reacting elements are equal.

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What is the wavelength of an electromagnetic wave that has a frequency of 7.80 * 10 ^ 14 Hz in a vacuum? (The speed of light in a vacuum is 3.00 * 10 ^ 8 m/s.)

A. 1.22 * 10 ^ - 15 * m
B. 3.85 * 10 ^ - 7 * m
C. 2.34 * 10 ^ 23 * m
D. 2.60 * 10 ^ 6 * m​

Answers

Answer:

B.) 3.85 x 10⁻⁷ m

Explanation:

To find the wavelength, you can use the following formula:

wavelength = speed of light / frequency

Since you have been given both the speed of light and frequency, you can plug these values into the equation to find wavelength.

wavelength = speed of light / frequency

wavelength = (3.00 x 10⁸ m/s) / (7.80 x 10¹⁴ Hz)

wavelength = 3.85 x 10⁻⁷ m

what are the 3 common gases that give off reactions?

Answers

The 3 common gases that give off reactions are Hydrogen sulfide, Carbon monoxide, Nitrogen oxides.

What are off reactions

Off reactions are defined as chemical reactions that occurs when something burns or during combustion of materials which gives off energy.

Some gases that give off reaction are:

Hydrogen sulfideCarbon monoxideNitrogen oxides

Note that these gases are mostly poisonous.

Therefore, the 3 common gases that give off reactions are Hydrogen sulfide, Carbon monoxide, Nitrogen oxides.

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Please help ASAP

Is there any evidence that a reaction has occurred? (One or more answers may be true.)

a. No, there is no change in the solution.
b. Yes, because H2SO4 is being added.
c. Yes, a precipitate formed.
d. Yes, there is a change in conductivity.

Answers

B and C are the correct answers
B and C are the correct answer ofc

How much energy is required to heat 36. 0 g h2o from a liquid at 65°c to a gas at 115°c? the following physical data may be useful.

Answers

The required energy will be "87752 J".

What is energy?

The definition of energy is "ability to do work," which is the capacity to apply a force that causes an item to move.

Mechanical, heat, chemical, electrical, radiant, nuclear, and sound are the seven types of energy.

The energy will be:

Q1 = 36 × 3.18(100-65)

Q1 = 5267 J

Moles of water = [tex]\frac{36.0}{18}[/tex]

Moles of water = 2

then,

Q2 = 2× 40.7

Q2 = 81.4 KJ

Q2 = 81400 J

Q3 = 36.0 × 2.01(115-100)

Q3 = 1085 J

hence,

Required energy will be= Q1+ Q2+ Q3

Required energy = 5267 + 81400 + 1085

Required energy = 87752 J

hence, 87752 J energy is required to heat 36. 0 g h2o from a liquid at 65°c to gas at 115°c.

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explain why nickel is a good conductor of heat​

Answers

Answer:

Its a good conductor because its a metal

Answer:

periodic table

Explanation:

in its magnetic properties and chemical activity it resembles iron and cobalt

What is the si unit that refers to the number of particles contained in a substance.

Answers

Answer:

one mole contains exactly 6.022 14076 into 10 23 elementary this number is the fix numerical value of the evandi and the constant and a b where expects in the unit mol - 1 is called the abacation number that amount of substance of a system is measured of the number specific

Question 3
Not yet
answered
Points out of
If you dissolve 2.70 g of NaCl in 425 mL of water, what is the molarity of the
solution? (Report your answer to three places past the decimal point. Moodle is
looking for a number only, no units.)

Answers

I added a screenshot because I recently answered the same question. I hope this helps you!! :)

How many moles FeBr3 are required
to generate 275 g NaBr?

2FeBr3 + 3Na₂S → Fe₂S3 +6NaBr

Answers

Answer:

0.893mol

Explanation:

n = m ÷ M

= 275 ÷ (23 + 80)

= 2.67 mol

* now use the Mol ratio *

NaBr : FeBr3

6 : 2

2.67 : x

5.67 = 6x

n( FeBr3 ) = 0.893 mol

The ideal gas law only approximates the behaviour of real gases. The conditions
under which the ideal gas law is MOST accurate are

Answers

Answer:

I d K

Explanation:

• Reflect on the importance of stoichiometry and rate of chemical reaction in the design of car airbags

Answers

Answer:

If an insufficient amount of nitrogen were produced, the air bag would under inflate and not provide adequate protection. Clearly, the stoichiometry of the reaction is very important.

The exothermic reaction between solid aluminium powder and solid manganese (IV) oxide, produces solid manganese and
another product. How many moles of aluminium powder are needed to produce 203.7 grams of manganese?

Answers

The number of moles of aluminum powder needed to produce 203.7 grams of manganese is 5 moles.

How to calculate the number of moles of Aluminium powder?

Heat, Mn, and Al2O3 are produced when aluminum powder and manganese dioxide are heated.

[tex]3MnO_{2} + 4Al - > 3Mn + 2Al_{2} O_{3} + Heat[/tex]

The balanced chemical equation in this situation indicates that there are 3 moles of manganese and 4 moles of aluminum involved in the reaction, which results in a 3:4 mole ratio.

You may make use of this mole ratio by calculating how many moles of aluminum are required to react with the 203.7g of Manganese. So,

Firstly, the mass of Aluminium has to be taken out

Let the mass be considered x.

So, the number of moles of Aluminium = x/27

Number of moles of Manganese = 203.7/54

Hence, the mass x will be,

[tex]x = 4 *203.7 * 27 / 3 * 54[/tex]

[tex]x = 135.8g[/tex]

Hence,  the number of moles of Aluminium is = 135.8/27 = 5 moles.

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Match the zone to its characteristics.
Horse latitudes
Subpolar low
Doldrums
?
?
?
Heavy precipitation, little
wind
The trade winds and
westerlies originate here
Lies along the polar jet
stream

Answers

The zone and its characteristics include the following:

Subpolar low: Lies along the polar jetstream.Horse latitudes: The trade winds and westerlies originate here.Doldrums: Heavy precipitation, little wind.

What is Horse latitude zone?

This is referred to regions which is located at about 30 degrees north and south of the equator and forms the basis of westerlies.

The other zones such as doldrums are also found at the equator with their respective features and can be seen above. This therefore makes it the most appropriate choice.

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Please help!
Three sections of the periodic table are labeled A, B, and C in the image below.

Which of the following statements is most likely true for an element present in section A?

It is dull and brittle.
It is malleable and ductile.
It is a liquid at room temperature.
It is a poor conductor of electricity.

Answers

Answer:

they are metals so they are:-

-malleable

-ductile

because metallic bonding is the same in all direction throughout the solid

What is the name of this hydrocarbon?
hexane
O heptane
O octane
O pentane
Mark this and return
H H H H H
|||||
H-C-C-C-C-C-H
|||II
H H H H H
Save and Exit
Next
Submit

Answers

Answer:

alkanes alkens alkenes and a bromatic hydrocarbons

Answer:

[tex]\huge\boxed{\sf Pentane}[/tex]

Explanation:

The given compound has:5 carbonsall single bonds

Prefix for 5 carbons = Pent

Suffix for all single bonds = ane (since the compound is alkane)

So, the name of this hydrocarbon is:

Pentane

[tex]\rule[225]{225}{2}[/tex]

The chemical formula for a emerald is BeAl2(SiO3)6.
An emerald can be described as

Answers

Emerald  can be described as a transparent, green coloured gem stone made up of mineral beryl together with trace amount of chromium or sometimes vanadium having chemical formula as [tex]Be_3Al_2(SiO_3)_6[/tex] .


What is the significant of Emerald ?

Through time, the emerald has been known as a symbol of truth and love.

In ancient Greece and Rome, emerald was said to be the gemstone of the goddess Venus, purveyor of love and hope.

On the other side of the world, emeralds were revered by the Incas and believed by the Egyptians to be a source of eternal life.

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When some water condensed
onto a glass, it released 9.15 Cal
of energy. How many joules of
energy is this?
[?] joules

Answers

When we convert 9.15 Calories to joules, the result obtained is 38.28 Joules

How do i convert 9.15 calories to joules?

From the question given above, the following data were obtained:

Energy (in Calories) = 9.15 caloriesEnergy (in Joules) =?

The conversion scale to convert calories to joules is given below:

1 Calorie = 4.184 Joules

Using the above scale, we can convert 9.15 calories to joules as shown below:

1 Calorie = 4.184 Joules

Therefore,

9.15 Calories = (9.15 Calorie × 4.184 Joules) / 1 Calorie

9.15 Calories = 38.28 Joules

Thus, we can conclude from the above calculation that the energy in joules is 38.28 Joules

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Answer:

38,200J

Explanation:

 9.15 x 4.18 x 1000= 38,247 → 38,200J

What does the NaBr + Cl₂ represent
in the reaction?
NaBr + Cl₂ →>>
NaCl + Br₂

Answers

Answer:

The reactants

Explanation:

The molecules on the left side of the reaction are the reactants. Reactants are the molecules which react with one another to form something new.

The molecules on the right side of the reaction are the products. Products are the molecules that form in response to the reaction.

Based on our consumption of fossil fuels today, what can be predicted will eventually occur? Select all that apply

Answers

Based on consumption of fossil fuels today, It can be predicted Fossil Fuels will eventually be used up and a new energy developed to supply energy needs of the world.

What are fossil fuels ?

Fossil fuels are made from decomposing plants and animals.

These fuels are found in the Earth's crust and contain carbon and hydrogen, which can be burned for energy.

Coal, oil, and natural gas are examples of fossil fuels.

Above given fossil fuels are expected to be used up and a new energy developed to supply energy needs of the world.

Therefore, Based on consumption of fossil fuels today, It can be predicted Fossil Fuels will eventually be used up and a new energy developed to supply energy needs of the world.

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4 Many tourists to China want to see giant pandas. Suggest how this could be used to help to conserve the pandas. ​

Answers

Answer: to protect giant pandas

Explanation:

Which compound contains only nonpolar covalent bonds?.

Answers

Answer:

02 or oxygen if im not mistaken

anyone? got an answer​

Answers

Hshshshshjshshshshssgsghsgsgshshshshshshs THE ANSWER IS D

Which of the following is the best thermal insulator to reduce the transfer of
thermal energy by radiation?
O A. Air
OB. Glass
O C. Wood
OD. A vacuum

Answers

Among the given mediums, Vaccuum is the best thermal insulator to reduce the transfer of thermal energy by radiation as there will be no air particles which carries heat from one place to other. Hence, Option (D) will be the correct option

What is Heat radiation ?

Heat Radiation refers to the transfer of heat from a hot body to cold body directly, without heating the medium between two bodies.

Vaccum does not have any particles in it. Thus, there will be no transfer of heat through it.

The best example of it is thermous flask in which vaccuum inside thermous flask reduces the transfer of energy through it.

Hence,Among the given mediums, Vaccuum is the best thermal insulator to reduce the transfer of thermal energy by radiation as there will be no air particles which carries heat from one place to other. Thus, Option (D) will be the correct option

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HELP FAST PLEASE! If a reaction takes place and the theoretical yield is 73 g and the actual yield is 62 g, calculate the percent yield.


Choices:

A. 76%

B. 1.16%

C. 116%

D. 85%

Answers

Answer:

A

Explanation:

I think it's A. There are good answer for A.

predict the missing component in the nuclear equation

Answers

The answer is C since both charge and mass have to be balanced on both sides of the equation.

Which shows two structures that are made mostly of metal?

Answers

Answer:

The bell and the Eiffel tower

the bell and the eiffel tower

□ 4. In a closed container, the temperature is increased by 50%. Which of the following will happen to the gas inside the container?
O It will remain unchanged.
The molecules will move more slowly.
The molecules will exert less pressure on the container walls
O The molecules will move more quickly.

Answers

Answer: The molecules will move more quickly.

Explanation:

As temperature increases, the kinetic energy of the particles increases, causing them to move more quickly.

A can of coke which is 12.0ml and is at a temperature of 18.0°C is placed into a refrigerator freezer. The
can was accidently left over night and the temperature dropped to -1.00°C. What would happen to the
volume of the coke can?

Answers

Answer:

See below

Explanation:

Volume would decrease to temp of approx 4 C  then it would slightly increase to the 1 degree C  point but it would still be a smaller volume than at 18 C .    

  ( this assumes a freezing point of   - 1.11 C for Coke )

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