All categories

3 years ago

A scientist who studies the origin of living organisms through fossils

Chemistry

2 answers:

djverab [1.8K]3 years ago

8 0

Yeah the correct answer is paleontologist

Please mark Brainiest if helpful

mestny [16]3 years ago

5 0

I think the answer would be a paleontologist.

You might be interested in

How many moles of sodium carbonate contain 1.773 × 1017 carbon atoms?

vesna_86 [32]

Answer:

2.941 × 10⁻¹⁷ mol

Explanation:

1) Chemical formula of sodium carbonate: Na₂CO₃

2) Ratio of carbon atoms:

The number of atoms of C in the unit formula Na₂CO₃ is the subscript for the atom, which is 1 (since it is not written).

Hence, the ratio is 1 C atom / 1 Na₂CO₃ unit formula.

This is, there is 1 atom of carbon per each unit formula of sodium carbonate.

3) Calculate the number of moles in 1.773 × 10⁷ carbon atoms

Divide by Avogadro's number: 6.022 × 10²³ atoms / mol

number C moles = 1.773 × 10⁷ atoms / (6.022 × 10²³ atoms/mol)

number C moles = 2.941 × 10⁻¹⁷ mol

Since, the ratio is 1: 1, the number of moles of sodium carbonate is the same number of moles of carbon atoms.

5 0

3 years ago

Hydrogen bonds are

ella [17]

Answer:

Explanation:

hydrogen bonds are initially weak and collectively strong because they are partially positive ions

3 0

3 years ago

55 points take the or whatever but Im getting head on my 15th bday on march 26th gonna be great also help me Two or more substan

Kipish [7]

Mixture is the answer.

3 0

2 years ago

What is the product of 1.65 and 1.05 x 10-27

lilavasa [31]

Answer:

-9.675

Explanation:

correct me if im wrong.!!

3 0

2 years ago

Read 2 more answers

The mole fraction of a non-electrolyte (MM 40.0 g/mol) in a saturated aqueous solution is 0.310. What is the molality of the sol

jeka57 [31]

Answer: The molality of non-electrolyte is 24.69 m

Explanation:

We are given:

Mole fraction of saturated aqueous solution = 0.310

This means that 0.310 moles of non-electrolyte is present.

Moles of water (solvent) = 1 - 0.310 = 0.690 moles

To calculate the mass from given number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

Moles of water = 0.690 moles

Molar mass of water = 18 g/mol

Putting values in above equation, we get:

$0.690mol=\frac{\text{Mass of water}}{18g/mol}\\\\\text{Mass of water}=(0.690mol\times 18g/mol)=12.42g$

To calculate the molality of solution, we use the equation:

$\text{Molality}=\frac{n_{solute}\times 1000}{W_{solvent}\text{ (in grams)}}$

Where,

$n_{solute}$ = Moles of solute (non-electrolyte) = 0.310 moles

$W_{solvent}$ = Mass of solvent (water) = 12.42 g

Putting values in above equation, we get:

$\text{Molality of non-electrolyte}=\frac{0.310\times 1000}{12.42}\\\\\text{Molality of non-electrolyte}=24.96m$

Hence, the molality of non-electrolyte is 24.69 m

4 0

2 years ago