i need help asapppp

You are a marine paleontologist working on the sediments in
the Mediterranean Sea. Seventeen different locations have
been investigated. Over four months your team found and
collected material that may once have been a part of an
ancient seabed. If it was an ancient seabed, it is likely to
contain fragments of shells and other fossils. After careful
analysis, you found one chemical to be predominant in all
seventeen samples. The percentage composition of this
compound was found to be 40.00% calcium, 11.99% carbon,
and 48.01% oxygen. The molar mass of the unknown
compound is 100.09 g/mol.

1. Find the empirical and molecular formulae for the unknown
compound (substance X). What is the name of this
compound?

Answers

Answer 1

The molecular formula of the compound is CaCO3.

What is the molecular formula?

The molecular formula is the formula of the compound that shows the number of atoms present in the molecule.

Now, we have that;

Ca - 40.00/40  C - 11.99/12   O - 48.01/16

Ca - 1   C - 1   O - 3

The empirical formula of the compound is CaCO3

Now;

[40 + 12 + 3(16)]n = 100.09

n = 100.09 /100

n = 1

Hence, the molecular formula of the compound is CaCO3.

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Related Questions

What category of organisms makes up the largest percent of the the fossils discovered? A. Land animals B. Marine animals C. Microorganisms

Answers

Answer:

Marine animals

Explanation:

A fossil is any remains of ancient life. Fossils can be body fossils, which are remains of the organism itself or trace fossils, such as burrows, tracks, or other evidence of activity(Lumen Learning).

Fossils of land animals are less common because they may not have been buried. However, land organisms may become buried underneath by mudslides or ash from a volcanic eruption, or covered by sand in a sandstorm.

Marine fossils are more common owing to quick burial. Marine animals that die near a river delta may be buried by sediment carried by the river. A storm at sea may shift sediment on the ocean floor, covering and helping to preserve skeletal remains(Lumen Learning).

How many electrons are needed in the outer energy levels of most atoms to be chemically stable?​

Answers

Answer:

8 electrons

Explanation:

Can someone please explain to me what a Ecologist does for a living? (Or daily in their career?)

Answers

ecologists look at relationships between nature, studying the interactions between humans, animal and plants.

Answer:

Ecologists focus on the relationship of organisms within their environment. Ecology is a branch of biology (biology is the study of life). Given the broad scope of ecology, there are multiple sub-disciplines that an ecologist can choose to focus on. Since all living things (plants, animals, microbes) depend on other living things and a healthy environment to survive, ecologists may specialize in one aspect of an ecosystem. Examples include terrestrial (land), aquatic (water), applied (concepts and principles of ecology), conversation (management of biodiversity), and evolutionary (evolution).

Explanation:

Brainliest plz

In the lab, you are given a metal ball. You measure the mass of the ball to be 28 g. You place the ball in a graduated cylinder and the water level increases from 28.2 mL to 31.4 mL. What is the density of the metal ball? (round you answer to the nearest hundredth)

Answers

Answer:

Density = 8.75ml

Explanation:

Density = Mass / Volume

In this problem ...

Mass = 28 grams

Volume = 31.4ml - 28.2ml = 32ml (water displacement also)

∴Density = mass /volume = 28g/32ml = 8.75g/ml

Why is red tide dangerous to ocean animals?

Answers

Answer:

Karenia brevis produces toxins called brevetoxins that affect a variety of marine wildlife. Aquatic organisms can be exposed to brevetoxins in several ways: coming into contact with K. brevis cells or toxins in the water, ingesting cells, inhaling toxins and consuming toxic prey.

Explanation:

If you tested two samples of a particular pure substance, what would you find?

Answers

Answer:

The properties of a pure substance can be used to determine whether a sample is a pure substance or mixture because the characteristic properties of matter can be used to identify a sample. The result is a mixture called a composite.

Explanation:

Pure substances contains their own molecules only and not any  impurity. Thus, when we tested it  only shows the properties of its own.

What are pure substances?

Pure substances are substances containing its pure composition without any impurities. For example water, fruits, acids etc. are pure substances and they does not have a combination other substances.

Mixtures are the combination of two or more pure substances, and the can be heterogenous or homogenous. Whereas, pure substances homogenous only thus forming only one phase.

When we tested mixtures qualitatively, they shows the properties of each  individual components in it. Whereas, pure substances give inly its own characteristics.

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What type of heat transfer causes the water in the bottom of the pool to be cooler and the water at the top to be warm?

Answers

Answer:

i think its convection

Explanation:

1. How many moles does 24 g of Mg contain?​

Answers

Explanation:

1 mole Of atom = GAM

MG=24g

GAM of Mg=24g

Therefore 24g=mole

Not My answer But I saw That You needed it.

Credit zeeshanfazil

thank him for the answer!

What is the boiling point for butane?

Answers

Answer:

30.2°F

Explanation:

Butane, the liquid that can be seen inside a transparent lighter, boils at a temperature slightly under the point at which water freezes. So why doesn't the butane in the lighter boil? Butane does indeed boil at about a degree below 32 degrees Fahrenheit, but this is true only at normal atmospheric pressure. (:

What type of weathering occurs when acid rain changes rocks? A. erosion
B. deposition C. chemical weathering D. physical weathering

Answers

Answer:

c...................................

The density of water H20 is bout 1 g/ml. If u have a bottled water that is 500 ml how many grams is this

Answers

Answer:

500 grams

Explanation:

500 milliliters x 1 gram per millileter = 500 grams.

Two students conduct the same experiment, but they get different results. What should the students do next?A.The students should check their procedure and tools for sources of error. B.Both students should throw out their data and start over. C.The students should compare data with other students and then use the data from the student who was closest to the rest of the class. D.The students should find the average of each data set and each report the average data.

Answers

Answer:

A.The students should check their procedure and tools for sources of error.

Explanation:

Answer:

I think it A

Explanation:

Is it okay if you help me? I'm kind of in a tight spot here. Tysmmmmmmmmmmmmm o(❁´◡`❁)o!!

Answers

Answer:

C. Remains constant

Explanation:

Hope this helps (:

C! Remains Constant

How many atoms would you find in 3.60 g of Boron?

Answers

Answer:

1.8 * 10^24 atoms

Explanation:

n = M(B) / m = 10.8 / 3.60 = 3 mol

N = n * Na = 3 * 6*10^23 = 1.8 * 10^24 atoms

Which type of cell is associated with the statements below? Fill in the blank with either (voltaic cell, electrolytic cell, both).
Non-spontaneous reaction occurs:
Spontaneous reaction occurs:
Oxidation occurs at anode:
Electrolyte supports electron flow:

Answers

Answer:

Non-spontaneous reaction occurs: electrolytic cell.

Spontaneous reaction occurs: voltaic cell

Oxidation occurs at anode: both

Electrolyte supports electron flow: both

Explanation:

Describe what happens when a. piece of potassium is dropped into a trough of water coloured with red litmus.
Pls help,it's urgent!!!​

Answers

Answer:

Explanation:

What does it mean if a solution is a "weak acid "? Strong acid? Give logical ph values for each

Answers

Answer:

A weak acid is an acid that partially dissociates into its ions in an aqueous solution or water. In contrast, a strong acid fully dissociates into its ions in water. At the same concentration, weak acids have a higher pH value than strong acids.

Explanation:

:)

how much empty space was there in the medium-sized rock sample​

Answers

Answer:

I'm assuming this is from a lab that you did - in which case, I can't really help you out here.

Explanation:

Nah I’m going to have to say that it is 27

What is the acceleration due to gravity at Earth's surface?​

Answers

Answer:

9.8 m/s2

Explanation:

That is to say, the acceleration of gravity on the surface of the earth at sea level is 9.8 m/s2.

Dababy without a doubt

A 4 feet tall student went summing pool. He saw depth of water in pool less than 4 feet.Will he drowned.Write reason

Answers

Answer:

Question says , the height of the student = 4 feet, ... This means, if the student goes for swimming in the pool, however he does not know swimming, he will not be drowned until he is suffering from an injury or external force.

It depends if the water is less then where his face is, if it’s below his face then no, if it’s above... then probably.

Increasing an airplane's speed or wing size does which of the following? O A. Creates a sonic boom B. Generates more lifting force O C. Increases the gravitational pull on the plane D. Decreases the amount of drag acting on the plane SUBMIT​

Answers

Answer: B: generates more lifting force.... just got it correct

Explanation:

Answer:

B. Generates more lifting force

Explanation:

i took the quiz on Ap*x and it was correct

Given a 6.80 g sample of H2O how many grams of oxygen is produced assuming the decomposition goes to completion

Answers

Answer:

6.0444g

the formula must be after balancingknown as 36(mass) of H2O can produce 32(mass) of O2so 6.80g of H2O can produce (x)g of oxygen

According to the stoichiometry of the decomposition of water 6.04  grams of oxygen is produced assuming the decomposition goes to completion.

What is stoichiometry?

Stoichiometry is  defined as the determination of proportions of elements or compounds which are present  in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.

Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.It is useful in balancing chemical equations.According to the reaction, 36 g water gives 32 g oxygen thus 6.80 g water will give 6.80×32/36=6.04 g.

Thus, on  decomposition of water 6.04  grams of oxygen is produced assuming the decomposition goes to completion.

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i need help writing a LAB REPORT about NATURAL SELECTION

(plus i don’t know what exact subject it is so i’m sorry if it’s the wrong subject)

Answers

Answer:

Translate from Ukrainian.

У цей приклад я візьму селекції пшениці. Коли ми будемо говорити про селекцію цього злака, то ми можемо отримати меньшу собівартість, та вартість вирощування. Збільшена урожайність, та менша потреба в гербіцидах, пестицидах, та інсектицидах це теж наслідок. Тому селекція це майбутнє!

what conversion factor is needed to calculate the number of atoms in 8.6 moles of Aluminum?

A. 1 mole/ 6.02x10^23 atmos
B. 6.02X10^23 atoms/ 1 mole
C. 1 mole/ 26.98zg
D. 26.982g/ 1 mole

Answers

Answer:hey did you ever get an answer? I need it for this exam

Explanation:

Write the word and balanced chemical equations for the reaction between:
Aluminum + iron sulfate

Answers

Explanation:

Aluminium - Al

Iron Sulfate - FeSO4

The reaction is given as;

Al + FeSO₄ -->  Al₂ (SO₄) ₃ + Fe

The balanced equation is given as;

2 Al + 3 FeSO₄ -->  Al₂ (SO₄) ₃ + 3 Fe

In words it is given as;

Aluminium + Iron Sulfate --> Aluminium Sulfate + Iron

what is an accurate description of a period in the periodic table

Answers

Answer:

The periods of the periodic table are the horizontal rows.

Explanation:

Answer:

period is a horizontal row of the periodic table

Explanation:

A period in the periodic table is a row of chemical elements. All elements in a row have the same number of electron shells. Each next element in a period has one more proton and is less metallic than its predecessor

Feel free o copy and paste

Please help


according to the ____ rule, elements tend to react until they have the same electron configuration as a _____. _____, found on the left of the _____, tend to lose electrons and from ____. _____ tend gain electrons to form _____.

Answers

Answer:

What chapter is this and what grade are you, i can check this for you

Explanation:

Plants cells also gain energy through cellular respiration.

True or false?

Answers

True ................

Answer:

true

Explanation:

Which statement about copper, diamond, and silicon(IV) dioxide is correcta)Copper and silicon(IV) dioxide have similar electrical conductivityb)In diamond the carbon atoms are covalently bonded as flat sheetsc)In silicon(IV)dioxide the silicon and oxygen atoms are covalently bonded in flat sheetsd)The structure of copper includes a lattice of positive ions

Answers

Answer:

In diamond the carbon atoms are covalently bonded as flat sheets

In silicon(IV) dioxide the silicon and oxygen atoms are covalently bonded in flat sheets

The structure of copper includes a lattice of positive ions

Explanation:

Diamond and silicon(IV) dioxide are covalent network solids. Covalent network solids are made up of atoms joined to one another by covalent bonds to form a giant lattice, The solids are hard and have a very high melting point. They do not conduct electricity. So, for both diamond and SiO2, atoms are covalently bonded to yield flat sheets in a covalent bonded network solid.

Copper is a metallic substance having metallic bonds, a metallic crystal consists of positive ions and a cloud of electrons.

What is the proper name for the chemical formula Cl4O5?

Answers

Answer:

Carbon tetraiodide

Explanation:

let me know if it works

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