57.1% carbon, 6.16% hydrogen, 9.52% nitrogen, and 27.18% oxygen

Answers

Answer 1
i would help if i could im sorry im sure someone else will answer soon im honestly trying to help as many people as i can

Related Questions

Changes in which two characteristics can indicate a physical change?
A. Shape
B. Reactivity
O C. State
D. Flammability

Answers

Changes in shape and state are the two characteristics  which indicate a physical change.

What are physical changes?

Physical changes are defined as changes which affect only the form of a substance but not it's chemical composition. They are used to separate mixtures in to chemical components but cannot be used to separate compounds to simpler compounds.

Physical changes are always reversible using physical means and involve a change in the physical properties.Examples of physical changes include melting,boiling , change in texture, size,color,volume and density.Magnetism, crystallization, formation of alloys are all reversible and hence physical changes.

They involve only rearrangement of atoms and are often characterized to be changes which are reversible.

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find ionic compounds ​

Answers

Answer:

1:1

Explanation:

The ratio of metal cationic atom to non-metal anionic atom in the compound is 1:1.

This is an ionic compound.

This is because metal cationic atom has two valence electrons. Non-metal anionic oxygen has six valence electrons Calcium loses two of its valence electrons to be isoelectronic with Ar and this confers a stable configuration to it. Non-metal oxygen atom accepts the electrons and adds 2 to its 6 electrons to become isoelectronic with neon. So, 1 metal cationic atom combines with 1 non-metal anionic atom to form the compound.

How many grams of chlorine can be produced by the electrolysis of sodium chloride solution
Fe²O³ + 3CO --> 2 Fe + 3CO²

calculate the mass of chlorine that can be formed from 50g of sodium chloride

Answers

Answer:

Therefore,900 C of charge produce produce chlorine=(71g)(1.93×105C)×(900C)=0.331g.

Explanation:

Follow me..........

What are two or more substances not chemically combined called? *
Element
Compound
Mixture
Atom

Answers

Answer is mixture!!

Answer:

✖︎ Mixture←  is the right answer answer, so don't choose that....…

THE corrects answer would be MIXTURE

!!!!!!Brainliest??

EXPLANATION

✰1.  I take the quiz

✰2. The word already describe it self, mixture is a substance made by mixing other substances together.

✰a mixture is a material made up of two or more different substances which are physically combined. A mixture is the physical combination of two or more substances in which the identities are retained and are mixed in the form of solutions, suspensions and colloids.

What are the trends for atomic size and ionization? Explain why for each trend. Tell me the direction- up or down a group and across a period for each trend. Use the lecture, the video at the end of the lecture, or the guide for periodic trends to respond to this prompt.

Answers

Answer:

See explanation

Explanation:

Atomic size increases down the group due to the addition of more shells.

As more shells are added and repulsion of inner electrons become more significant, atomic size increases down the group. However, across the period, atomic size decreases due to increase in effective nuclear charge without any increase in the number of shells. This causes increased attraction between the nucleus and the outermost shell thereby decreasing the size of the atom.

Ionization energy decreases down the group because the outermost electron is more shielded by inner electrons making it easier for this outermost electron to be lost. Across the period, ionization energy increases due to increase in effective nuclear charge which makes it more difficult to remove the outermost electron due to increased nuclear attraction.

What would be the change in
temperature if 5.0 g of water
absorbed 209 J of heat?

Answers

Answer:  he temperature of 100 grams of water changes from 16°C/7 How many kilojoules of heat are absorbed when 70.00 grams to 20°C.

Explanation: I hope that helped!

Your friends car has stalled in the road. You help you friend push the car off the road. Your friend pushed with a force of 55 N and you push in the same direction with a force of 60 N. How much force is being applied to the car

Answers

Answer:

115N

Explanation:

your  friend and you push the car at the same time at the same direction so you add the force your friend is using and the force you’re using so: 60+55=115N

The Electron Affinity(EA) tends to _________ as the atomic number increases In any group.
a.)increase
b.)decrease
:) thank uuu

Answers

Answer:

decrease

Explanation:

Assuming that the half-life of Isotope Q is 7.5 minutes, what amount of an original
150.0 gram sample of Isotope Q will remain after a half hour?

1. 37.5 g
2. 18.75 g
3. 80 g
4. 9.375 g

Answers

I think b I am not so sure
B is the answer for the question

Someone please help

Answers

Answer:

M = molar concentration

n = moles of solute

v = liters of solution

Explanation:

Help! Please will give brainliest for right answer!

Answers

Answer:

a positive nucleus gets smaller the negative electrons are attached closer in

Explanation:

If the earth's mantle were completely solid,__________ plates could not move around.

Answers

Answer:tectonic

Explanation:

Answer:

TECTONIC

Explanation:



PLEASEHELP WILL MARK BRAINLIEST

Answers

Answer:

2. Isotope, one of two or more species of atoms of a chemical element with the same atomic number and position in the periodic table and nearly identical chemical behavior but with different atomic masses and physical properties. Every chemical element has one or more isotopes.

3. Since the vast majority of an atom's mass is found its protons and neutrons, subtracting the number of protons (i.e. the atomic number) from the atomic mass will give you the calculated number of neutrons in the atom. In our example, this is: 14 (atomic mass) – 6 (number of protons) = 8 (number of neutrons).

Explanation: Try rewording the questions when looking it up.  Hope this helps

Answer:

9. 2(2n^2)

10. Electron Shell

11.-

12.-

13.-

14.-

Explanation:

i hope it helped

i’ll mark brainliest please

Answers

I’m assuming your just writing the formula? If so
Potassium chloride: KCL
Potassium nitride: KNO2
Potassium sulfide: K2S
calcium chloride: CaCl2
Calcium nitride: Ca3N2
Calcium sulfide: CaS
Silver chloride: AgCl
Silver nitride: Ag3N
Silver sulfide: Ag2S
Manganese (||) chloride: MnCl2
Manganese (||) nitride: Mn3N2
Manganese (||) sulfide: MnS

Which of the following phrases best describes an atom? Choose the two correct answers.
A.
made up of protons, electrons, and neutrons
B.
made up of solids, liquids, and gases
C.
largest unit of matter
D.
smallest unit of matter
E.
made up of water

Answers

Answer:

A & D

Explanation:

all of the other things are made up of atoms, not what atoms themselves are made of.  they are not large, and they make up all matter

An atom is made up of a nucleus and revolving electrons. Inside the nucleus protons and neutrons are located. Thus the components of an atom are protons, electrons and neutrons. Thus, option A is correct.

What is an atom?

An atom is the basic unit of every substances. Atoms combine together to form molecules, molecules then forms compounds and so on.

The inner core of an atom is called nucleus which contains positively charged particles namely protons and neutral particles neutrons. There are circular paths of fixed energy surrounding the nucleus.

The circular paths around the nucleus is called orbits through which the electrons are revolving. Electrons are negatively charged particles and they neutralize equal number of positive charges.

A neutral atom have equal number of protons and electrons and this number is called its atomic number. The sum of number of protons and neutrons is called the mass number.

Hence, an atom is made up of protons, electrons, and neutrons and option A is correct.

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Which biotic factor do all living things depend on?
O Water
Plants
O Air
(due today please help!!)

Answers

Answer:

plants

Explanation:

What are the similarities and differences in slurries, sols, pastes and gels?

Answers

I actually do not know the answer can I help tommorow if you are fine with it tooo sleeeepy have 14 exams tommorow have to prepare.

Sorry:(

hello, what’s the difference between oxidation and oxidising agents?

Answers

Answer:

An oxidising agent oxidises something else. Oxidation is loss of electrons (OIL RIG). That means that an oxidising agent takes electrons from that other substance.

Explanation:

When a ball is rolling down a hill, what forces are acting on the ball? Why does it speed up?
Include friction and gravity in your answer.

Answers

Answer:gravity

Explanation:

Answer:

the gravity speed up because the friction didn't speed up

I added 6 to a certain number and then divide the result by 3. Find the number if my final answer is 5. (show working)​

Answers

Answer:

let the number be x

so (x+6)/3 =5

x+6=15

x=9

.
The earth is slightly tilted on its axis. How much is it tilted?

A. 23.5 degrees
B. 28 degrees
C. 20.5 degrees
D. 25 degrees

Answers

Answer: D 25 degrees

Explanation: The reason because is 25x4=100 and slightly tilted =1/4 of the earth which is 25

Polyacrylamide is used in manufacturing soft contact lenses. It consist of 50.69% carbon, 19.71% nitrogen, 7.09% hydrogen, and 22.51% oxygen. Calculate the empirical formula for polyacrylamide.

Answers

Answer: The empirical formula is [tex]C_3NH_5O[/tex].

Explanation:

If percentage are given then we are taking total mass is 100 grams.

So, the mass of each element is equal to the percentage given.

Mass of C = 50.69 g

Mass of N= 19.71 g

Mass of H = 7.09 g

Mass of O = 22.51 g

Step 1 : convert given masses into moles.

Moles of C = [tex]\frac{\text{ given mass of C}}{\text{ molar mass of C}}= \frac{50.69g}{12g/mole}=4.22moles[/tex]

Moles of N=[tex]\frac{\text{ given mass of N}}{\text{ molar mass of N}}= \frac{19.71g}{14g/mole}=1.41moles[/tex]

Moles of H=[tex]\frac{\text{ given mass of H}}{\text{ molar mass of H}}= \frac{7.09g}{1g/mole}=7.09moles[/tex]

Moles of O = [tex]\frac{\text{ given mass of O}}{\text{ molar mass of O}}= \frac{22.51g}{16g/mole}=1.41moles[/tex]

Step 2 : For the mole ratio, divide each value of moles by the smallest number of moles calculated.

For C =[tex]\frac{4.22}{1.41}=3[/tex]

For N = [tex]\frac{1.41}{1.41}=1[/tex]

For H = [tex]\frac{7.09}{1.41}=5[/tex]

For O =[tex]\frac{1.41}{1.41}=1[/tex]

The ratio of C:N:H: O = 3:1:5:1

Hence the empirical formula is [tex]C_3NH_5O[/tex].

A student added white crystals to a clear liquid. The crystals dissolved in the liquid. After a few seconds, the liquid became quite warm and then turned bright red in color. The first indication that a chemical change was taking place could be observed when----

Answers

Answer:

Is when there is an increase in the temperature of the liquid

Explanation:

Increase in temperature of the liquid is an indication that chemical change occur because chemical change occur through process of chemical reaction and it involve when two or more substances combine together to form new substances which is as a result of change in chemical composition. The crystals dissolved in water to form another new solution and it became warm and this indicate a chemical change, new substances are formed as a result of increase in temperature.

Lacie is riding her bicycle at a velocity of 5 m/s, her mass is 50kg. What is her kinetic energy?

Answers

Answer:

Explanation:

given,

velocity = 5m\s

mass = 50kg

kinetic energy = ?

therefore, we know that,

kinetic energy = 1\2 * mass * velocity^2

                        = 1\2 * 50* 5 ^ 2

                        = 1\2 * 50* 25

                         = 1\2 * 1250

                         = 625

therefore, kinetic energy is 625

HOPE IT HELPED :D

Before the quarry was dug, the land contained more vegetation. What impact has this change most likely
had on the local ecosystem?

Answers

Answer: loss of nutrients

Explanation:

the quarry was dug up and vegetation started dyeing. the quarry was probably rich with nutrients.

HELP FAST PLEASE!!

Producers are able to produce more of a good and to make more profit from __________. A. high prices B. limited demands C. high production costs D. government involvement

Answers

Answer:

the answer is A

Explanation:

i took the test on edg.                  sorry it is so late:(

Answer:A

Explanation:

Rank these elements from smallest to largest atomic radii: zinc, calcium, radium, and bromine.
Select one:
O a. calcium, radium, zinc, bromine
O b. calcium, zinc, bromine, radium
c. bromine, zinc, calcium, radium
d. bromine, zinc, radium, calcium

Answers

Answer:

The correct option is;

c. Bromine, zinc, calcium, radium

Explanation:

The atomic radii of the elements as arranged in the periodic table decreases across the period and increases down the groups

The location of each of the elements are;

Zinc: Period 4, Group 12

Calcium: Period 4, Group 2

Radium: Period 7, Group 2

Bromine: Period 4, Group 17

Therefore, the element with the largest atomic radius = Radium

The element with the smallest atomic radius = Bromine

Calcium comes before zinc on period 4, therefore, the atomic radius of calcium is larger than that of zinc

The rank of the elements from smallest to largest atomic radius is therefore;

Bromine, zinc, calcium, radium.

What is a metallic bonding? A) The chemical bonding that takes place between metal atoms when they share electrons. B) The chemical bonding that takes place between metat atoms when they transfer electrons. C) The chemical bonding that takes place from the attraction of metal atoms and the other elements. D) The chemical bonding that takes place from the attraction of metal atoms and the surrounding sea of electrons.​

Answers

Answer:

D) The chemical bonding that takes place from the attraction of metal atoms and the surrounding sea of electrons.​

Explanation:

TOOK THE TEST

the chemical bonding or connection that occurs when metal atoms share electrons

The correct answer is A

Why is chemical bonding significant, and what is it?

Chemical bonds that hold molecules together also form temporary connections vital for life. Ionic, covalent, hydrogen, and London dispersion forces are examples of chemical bonding.

How are chemcial bonds created?

An attraction between ions or atoms is referred to as a chemical bond. Atoms trade or exchange valence electrons to create bonds. To reach a complete outer energy level, which is the most stable configuration of electrons, atoms must form chemical bonds.

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Calculate the volume (in cm³) of 38.5 grams of platinum if the density of platinum is 21.5 g/cm³. Give your answer to 2 decimal places

Answers

Answer:

[tex]\boxed {\boxed {\sf v\approx 1.79 \ cm^3}}[/tex]

Explanation:

The formula of density is:

[tex]d=\frac{m}{v}[/tex]

If the formula is rearranged for volume, it becomes:

[tex]v=\frac{m}{d}[/tex]

The mass of the platinum is 38.5 grams.

The density is 21.5 grams per cubic centimeter.

[tex]m=38.5 \ g \\d= 21.5 \ g/cm^3[/tex]

Substitute the values into the formula.

[tex]v=\frac{38.5 \ g}{ 21.5 \ g/cm^3}[/tex]

Divide. Note that the grams (g) will cancel each other out.

[tex]v=1.79069767 \ cm^3[/tex]

Round to 2 decimal places (hundredth place). The 0 in the thousandth place tells us to leave the 9 in the hundredth place.

[tex]v\approx 1.79 \ cm^3[/tex]

The volume is about 1.79 cubic centimeters.

Answer:

D = 1.79 cm^3

Explanation:

Use the formula Volume = Mass / Density with what you've been given.

V = 38.5 g / 21.5 g/cm^3

V = 1.790697674 = 1.79 cm^3

can someone tell me the answer

Answers

Balanced I believe, an equation needs to be balanced to obey the laws of conservation of mass
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