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Dafna11 [192]
3 years ago
6

Scientists have been able to find a full record of Earth's fossil history, thus making the fossil record complete.

Chemistry
1 answer:
Arada [10]3 years ago
5 0

Answer:

False

Explanation:

Few organisms were not preserved as well as others, and new fossils are found every day

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a photon of light has a frequency of 3.5 x 10 to the 14th Hertz what is the wavelength of this light what color is this late
Oliga [24]

Wavelength relates to frequency as follows: λ=vf in which f is the frequency, v is the speed of light, and λ is the wavelength.

4 0
3 years ago
How many moles of LiOH are required to prepare 1.50L of 5.4 M LiOH?
Snezhnost [94]
You would need 8.1 <span>moles of LiOH</span>
6 0
3 years ago
Determine whether you can swim in 1.00 x 10^27 molecules of water.​
zloy xaker [14]

Answer:

We can not swim in 1.00 × 10²⁷ molecules of water

Explanation:

The given number of molecules of water = 1.00 × 10²⁷ molecules

The Avogadro's number, N_A, gives the number of molecules in one mole of a substance

N_A ≈ 6.0221409 × 10²³ molecules/mol

Therefore

Therefore, we have;

The number of moles of water present in 1.00 × 10²⁷ molecules, n = (The number of molecules of water) ÷ N_A

∴ n = (1.00 × 10²⁷ molecules)/(6.0221409 × 10²³ molecules/mol) = 1,660.53902857 moles

The mass of one mole of water = The molar mass of water = 18.01528 g/mol

The mass, 'm', of water in 1,660.53902857 moles of water is given as follows;

Mass = (The number of moles of the substance) × (The molar mass of the substance)

∴ The mass of the water in the given quantity of water, m = 1,660.53902857 moles × 18.01528 g/mol ≈ 29.9150756 kg.

The density pf water, ρ = 997 kg/m³

Volume = Mass/Density

∴ The volume of the water present in the given quantity of water, v = 29.9150756 kg/(997 kg/m³) ≈ 30.0050909 liters

The volume of the water present in 1.00 × 10²⁷ molecules of water ≈ 30.0 liters

The average volume of a human body = 62 liters

Therefore, we can not swim in the given quantity of 1.00 × 10²⁷ molecules = 30.0 liters water

7 0
3 years ago
Which phrase best describes a period on the periodic table?
telo118 [61]

Answer:

<u>d. a row of elements</u>

Explanation:

Elements that are in the same group, have same number of electrons and make up a column in a periodic table.

.

3 0
3 years ago
Plzzz help and thank u
Sveta_85 [38]

Answer:

sports reporter

Explanation:

wnba

3 0
3 years ago
Read 2 more answers
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