What is the percent by mass of carbon in carbon dioxide (CO2)?
A. 27%
B. 33%
C. 43%
D. 73%

Answers

Answer 1
The answer is going to be a.27

Related Questions

What type of molecule is shown below?
H H
| |
H-C-C-0-H
|
Η Η
A. Ether
B. Aldehyde
C. Ketone
D. Alcohol

Answers

The type of molecule that is shown is D. Alcohol

The type of molecule which is shown in the given question is alcohol, due to presence of hydroxyl group.

What are functional groups?

Funcional groups are those specific groups which after attaching to any compound changes the property of that compound and then that compound will known by the propeties of that functional group.

Given molecule has the molecular structure CH₃-CH₂-OH, means in this molecule hydroxyl group is present which defines the general properties of alcohol.

Hence given molecule is an alcohol.

To know more about functional groups, visit the below link:

https://brainly.com/question/493841

What is the connection between iozination energy, electronegativity, and electron affinity of elements

Answers

Answer:

Explanation:

The three of them increase from left to right across the periods of the periodic table, and at the same time, they decrease from up to down across the groups of the periodic table.

Ionization Energy is defined as the energy required to remove the atom of an electron.

Electron affinity is defined as the change in energy when electron is added to a negative ion.

Electronegativity is the ability of an atom to attract other atoms to itself.

The chemical name for MgCl3

Answers

Answer:

The chemical name is magnesium chloride

Answer:

Magnesium chloride

Please mark as brainliest if answer is right

Have a great day, be safe and healthy  

Thank u  

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When two atoms form a molecule, the molecule has lower energy than the two separate atoms. However, when only two atoms are present, they bounce off each other and do not form a molecule. Explain what happens to the energy of the atoms when there are only two atoms and they collide.
DONT GIVE ME A LINK!!

Answers

Answer:

they end up bouncing against each other instead of merging together

Explanation:

2C2H6 + 8O2 = 4CO2 + 6H2O
My teacher wants to know how many moles are required, how many moles oaf carbon dioxide are produced and how many moles of water are produced. Can somebody please help me?

Answers

Answer:

4 moles of carbon

6 moles of water

Explanation:

I think as there no data given u have to is the numbers infront of the equation e.g 4CO2 so 4.

hope this helps :)

What is the number of moles of Sodium Chloride (NaCl) that is present in 29.22g sample of it?

Answers

there are 0.5 moles of NaCl present in a 29.22g sample.

to find moles of a compound you would look at the periodic table to find the mass. in this case, the mass of NaCl is 58.44 g/mol. now, you divide the sample mass of 29.22g by 58.44 g/mol. the grams will cancel each other out and you’re left with 0.5 mol in that sample

hope this helps!

Answer:

[tex]\boxed {\boxed {\sf 0.5000 \ mol \ NaCl}}[/tex]

Explanation:

We are asked to convert grams to moles. We must use the molar mass or the grams in 1 mole of a substance. These values are found on the Periodic Table as the atomic mass, but the units are grams per mole (g/mol) instead of atomic mass units (amu).

We are given the compound sodium chloride or NaCl. Look up the molar masses of the individual elements.

Na:  22.9897693 g/mol Cl: 35.45 g/mol

The formula for the compound does not contain any subscripts, so there is 1 mole of each element in 1 mole of the compound. Add the molar masses together to find sodium chloride's molar mass.

NaCl: 22.9897693 + 35.45= 58.4397693 g/mol

Now we can use the molar mass to create a ratio. We know there are 58.4397693 grams of NaCl in 1 mole of NaCl.

[tex]\frac {58.4397693 \ g \ NaCl}{ 1 \ mol \ NaCl}[/tex]

Multiply by the number of grams provided in the problem: 29.22

[tex]29.22 \ g\ NaCl*\frac {58.4397693 \ g \ NaCl}{ 1 \ mol \ NaCl}[/tex]

Flip the ratio so the units of grams of NaCl cancel.

[tex]29.22 \ g\ NaCl*\frac { 1 \ mol \ NaCl}{58.4397693 \ g \ NaCl}[/tex]

[tex]29.22*\frac { 1 \ mol \ NaCl}{58.4397693}[/tex]

[tex]\frac {29.22}{58.4397693} \ mol \ NaCl[/tex]

[tex]0.5000019738 \ mol \ NaCl[/tex]

The original measurement of grams has 4 significant figures, so our answer must have the same. For our answer, that is the ten-thousandth place. The 0 to the right of this place (0.5000019738) tells us to leave the 0 in the ten-thousandth place.

[tex]0.5000 \ mol \ NaCl[/tex]

There are approximately 0.5000 moles of sodium chloride in a 29.22 gram sample of sodium chloride.

grade 8 chem/ science

Answers

Answer:

reactants

Explanation:

have a good day!

Name the sub atomic particles in part Z of a boron atom give the relative charges of these sub atomic particles

Answers

Answer:

Neutrons and protons

Explanation:

There are three fundamental subatomic particles, these are;neutrons protons and electrons.

Ernest Rutherford successfully showed that every atom does possess a central core that contain positively charged particles (protons) called the nucleus. Chadwick later discovered the existence of neutrons.

Both protons and neutrons are found in the nucleus. Z represents the nucleus of the boron atom and houses the neutrons and protons of the boron atom.

____N2 + ____H2  ____NH3

Answers

Answer:

N2 + 3H2 + 2NH3

Explanation:

I'm assuming you're balancing the chemical equation

[tex]nitrogen \: reacts \: with \: hydrogen.[/tex]

N2 + 3H2 → 2NH3.

Explanation:-

L.H.S.

N = 2, H = 3×2 = 6.

R.H.S.

N = 2, H = 3×2 = 6.

Awnser all of them if you can its really EASY im feelin generous today 30 pts

Answers

Answer: 1. Synthetic Substance or Synthetic compound 2. Oil 3. Biofuels 4. Salt and Sugar 5. medicine 6. Synthetic 7. Background Knowledge and Visualizing

Explanation: Hope this helps! Good luck!

Answer:

1= synthetic substance

2= natural gas

3= alcohol

4=artificial musks

5= medicine

6= synthetic

7=Questioning the Text

Explanation: If  my answers are correct please mark me as a brainlist.

Which forward reaction shows an increase in entropy (disorder)?explain

A.H2(g) + CuO (s) --> H2O(l) + Cu(s)
B.HCl(g) + NH3(g) --> NH4Cl(s)
C.CaCO3(s) -> CaO(s) + CO2g)
D.H2O(g) + O2(g) --> 2H2O)

Answers

Explanation:

Entropy also increases when solid reactants form liquid products. Entropy increases when a substance is broken up into multiple parts. The process of dissolving increases entropy because the solute particles become separated from one another when a solution is formed. Entropy increases as temperature increases. S = entropy

k_{b} = Boltzmann constant

\ln = natural logarithm

\Omega = number of microscopic configurations

What is the best explanation for the fact that Styrofoam will not dissolve in water, but Styrofoam will dissolve in acetone?

1.styrofoam is polar and water is nonpolar

2.styrofoam is nonpolar and water is polar

3.Styrofoam is polar and water is polar

4.styrofoam is nonpolar and water is nonpolar

Answers

the answer would be the first

Can magic 8 ball wash with water?

Answers

Yessss of course why not

If you hear a weather report say that a low pressure system is coming in, what kind of weather can you expect?

A
wind

B
polluted air

C
precipitation

D
heat

Answers

The answer is A wind

How many moles of SO3 are in 2.4 *10^23 cules?

Answers

Answer:

0.4 moles

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

[tex]n = \frac{N}{L} \\[/tex]

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

We have

[tex]n = \frac{2.4 {10}^{23} }{6.02 \times {10}^{23} } = \frac{2.4}{6.02} \\ = 0.3986...[/tex]

We have the final answer as

0.4 moles

Hope this helps you

write in the chart which molecule is the acid,base, conjugate base,conjugate acid from the equation and watching the H+ movement
1 H2CO3 + H2O--- H3O+ +HCO3-
2 H3PO4 + H2O--- H2PO- +H3O+
3. HCO3- + H2O---H2CO3 +OH-
4 HNO3 +H2O---NO3- +H3O+​

Answers

Answer:

When H2O acts as a base, it gains one H, which forms its conjugate acid, H30. ... Write the formula for the conjugate base for each of the following acids: a. ... H3PO4(aq) + H2O(l) 7 H2PO4 (aq) + H3O+(aq) ... CO32-(aq) + H2O(1) 2 HCO3 (aq) + OH(aq) ... balanced equation for the reaction of the ammonium ion with water.


Select the correct answer.
A compound has an empirical formula of C2H5. What is true about this empirical formula?
ОА It models the structure of the compound.
ОВ. It shows the ratio of elements in the compound.
Ос. . It gives the mass of each atom in the compound.
OD. It indicates the number of atoms in the compound.
O E. It describes only this one compound.


Answers

Answer: OB

Explanation:

The empirical formula of an element is the simplest formula of an element which shows the ratios of atoms of the each element present in a molecule of a compound .

Calculate the potential energy of a block of mass of mass 0.3kg and at a height 2.6m above the ground.(take acceleration due to gravity:10m/s)​

Answers

Explanation:

Mass (m)=0.3 kg

height(h)=2.6 m

acceleration due to gravity (g)=10m/s^2

Potential energy= MGH

=0.3×10×2.6

7.8 J

Give brainliest if u can

What volume would be occupied by 16.0 g of CH4 at 00C and 760 mmHg?

Answers

Answer:

22.4 L

Explanation:

We'll begin by calculating the number of mole in 16.0 g of CH₄. This can be obtained as follow:

Molar mass of CH₄ = 12 + (4×1)

= 12 + 4

= 16 g/mol

Mass of CH₄ = 16 g

Mole of CH₄ =?

Mole = mass / molar mass

Mole of CH₄ = 16 / 16

Mole of CH₄ = 1 mole

Finally, we shall determine the volume of the gas. This can be obtained as follow:

Number of mole of CH₄ (n) = 1 mole

Pressure (P) = 760 mmHg = 1 atm

Temperature (T) = 0°C = 273 K

Gas constant (R) = 0.0821 atm.L/Kmol

Volume (V)?

PV = nRT

1 × V = 1 × 0.0821 × 273

V = 22.4 L

Therefore, the volume of the gas is 22.4 L

What can we do to protect our oceans ?

Answers

pick up plastic, reduce waste, reduce pollutants
Around Home

1. Conserve Water

Use less water so excess runoff and wastewater will not flow into the ocean.
2. Reduce Pollutants

Choose nontoxic chemicals and dispose of herbicides, pesticides, and cleaning products properly.
3. Reduce Waste

Cut down on what you throw away.
Around Town

4. Shop Wisely

Choose sustainable seafood. Buy less plastic and bring a reusable bag.
5. Reduce Vehicle Pollution

Use fuel efficient vehicles, carpool or ride a bike.
6. Use Less Energy

Choose energy efficient light bulbs and don't overset your thermostat.
On the Water

7. Fish Responsibly

Follow "catch and release" practices and keep more fish alive.
8. Practice Safe Boating

Anchor in sandy areas far from coral and sea grasses. Adhere to "no wake" zones.
9. Respect Habitat

Healthy habitat and survival go hand in hand. Treat with care.
10. Anytime, Anywhere

Volunteer

Volunteer for cleanups at the beach and in your community. You can get involved in protecting your watershed too!

Hope this helps

bacterial cells.



Which label belongs in the area marked animal?

nucleus
DNA
cell wall
ribosomes

Answers

Answer:

I believe it would be (nucleus)

What causes the "heat island" effect?
a. heat produced from a large number of people

b. the materials used in building cities retain heat

c. the large amount of reflected light from glass windows

d. all of the above
Please select the best answer from the choices provided
A
B
C
D​

Answers

D all of the above answers are correct

The individuality of an organism is
determined by the organism's
A) amino acids
B) DNA nucleotide sequence
C) nitrogenous bases
D) transfer RNA molecules

Answers

I think is B sorry if I’m wrong

How much energy is required to raise the temperature of a 300.0

gram block of lead from 22.3°C to 59.9°C? The specific heat of lead is

0.129 J/gºC.

Answers

Answer:

Q = 1455.12 Joules.

Explanation:

Given the following data;

Mass = 300 grams

Initial temperature = 22.3

Final temperature = 59.9°C

Specific heat capacity = 0.129 J/gºC.

To find the quantity of energy;

[tex] Q = mcdt[/tex]

Where,

Q represents the heat capacity.

m represents the mass of an object.

c represents the specific heat capacity of water.

dt represents the change in temperature.

dt represents the change in temperature.

dt = T2 - T1

dt = 59.9 - 22.3

dt = 37.6°C

Substituting the values into the equation, we have;

[tex] Q = 300*0.129*37.6 [/tex]

Q = 1455.12 Joules.

2.91 moles of aluminum are how many grams(with work)

Answers

2.91 mol Al * ( 26.982 g Al / 1 mol Al) = 78.518 grams
It will be 78.51627558 bec one gram of Al equal 0.037062379468509

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Which of the following are indicators of a healthy water source?


A.high nitrates, high pH, and low temperatures

B.low temperature, high dissolved oxygen, and neutral pH

C.low pH, high nitrates, and low dissolved oxygen

D.high turbidity, high dissolved oxygen, and high temperature

Answers

Answer:

B.

Explanation:

B. low temperature, high dissolved oxygen, and neutral pH

Hope this Helps.

What type of erosion and deposition is not a major force in Texas

Answers

Best answers I could come up with
Gravity
Glaciers
Wind
Water

Hydrogen gas reacts with oxygen gas to form water. At STP, how many liters of hydrogen gas react with 32.4 liter of oxygen gas? (H2 + O2 -> H2O)

Answers

Answer:

I think its 1.2L? i may be wrong

Explanation:

Recall old Avogadro's hypothesis...........

Equal volumes of gases contain AN EQUAL NUMBER of PARTICLES

And thus if there are

2.4

L

of dihydrogen, stoichiometric equivalence requires

1.2

L

of dioxygen. How many litres of water g

Answer the following questions using the chemical equation below:

6CO2 + 6H2O => C6H12O6 + 6O2

3. How many total atoms are on the product side?

4. How many molecules of water are on the reactant side?

Answers

3. 36 atoms total on the product side
4. Six molecules of water on the reactant side

atoms of which of elements will form covalent bonds in a compound
A. C and O
B. Na and F
C. Co and Fe
D. Li and Al

Answers

C and O will come together to form CO2 (carbon dioxide)
Other Questions
Helppppppppp!!!!!!!!!!!!!!! The ratio of boys to girls in a class is 3:5. There are 40 students in the class. How many students are girls? Choose the correct sentence. a. John's class is visiting the Franklin Institute, which has always been one of my favorite science museums. b. John's class is visiting the Franklin Institute, which has always been one of my favorite Science Museums. Correct theerrors. Somesentences do nothave errors.a) Jim can't afford going to the cinema twice a weekb) David wishes leaving the room.c) Are you waiting to use the phone?d) I'd really like going swimming on Saturday.e) Everyone decided to put off the football match.f) Emma pretended leaving, but waited outside.Sebabg) Jack agreed to meet me at the beach.h) My bike seems having something wrong with it.i) The director refused answering Helen's phone call.j) What exactly do you intend to say to Mrs Dawson? Quiet va a estudiar despues de trabajar? If a person was interested in building houses, what are two jobs within the construction industry that might interest them? Please explain why you chose the particular two jobs that you have chosen how are they related to house building? Using Reaction A, how many grams of CO2 can be created from 5.67 moles of water?127.6 g CO2 199.6 g CO2 81.65 g CO2 311.85 g CO2 i really need help with this. Help, me easy and fast! Just dont understand it What transitions occurs when an ice cube shrinks Find the missing side of each triangle. Round your answers to the nearest tenth if necessary Jan says that a rhombus is a parallelogram and that every parallelogram is also a rhombus. Is Jan correct? Each car on a Ferris wheel travels 942.5 ft during 10 rotations of each ride. How high is each car at the highest point of each rotation? Why did the Confederacy have a difficult time stopping Sherman? Why would an artist use contrasting scale in a single piece of work "Whack. The hatchet sticks in the frozen turkey."This is an example of what type of figurative language? draw a circuit plz A 3 resistor is connected in series to a 6 resistor and a 12-V battery. a. Draw the circuit.can someone help me draw a better circuit plz Question 2Iban:el sbado pasadoEanocheDtodos los das Donna wants to rent a boat and spend less than $43. The boat costs $8 per hour, and Donna has a discount coupon for $5 off. What are the possible numbersof hours Donna could rent the boat?Use t for the number of hours. I need help with this