1.27g
Explanation:
Given parameters:
Number of moles of C₂₀H₄₂ = 4.52 x 10⁻³moles
Unknown:
Mass of the compound = ?
Solution:
The mole is a comfortable unit for measuring chemical substances.
number of moles = 
Molar mass of C₂₀H₄₂ = (12 x 20) + (1 x 42) = 240 + 42 = 282g/mol
Mass of the compound = number of moles x molar mass
= 4.52 x 10⁻³ x 282
= 1.27g
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Answer: increasing the masses of the objects and decreasing the distance between the objects
Explanation: mark me Brainliest
Molality is defined as the number of moles of solute present in 1L of solution.
Molality (M) = No of moles of solute / 1 L of solution
Litre of solution = No of moles of solute / Molality
Molality = 0.220M
No of moles= 0.0170 mol
Volume in L = 0.0170/0.220
= 0.0772 L
Volume in mL = 77.27 mL
What is mole?
- A mole is a very important unit of measurement used by chemists.
- moles of something means there are 602,214,076,000,000,000,000,000,000,000,000 number of something.
- Chemists need to measure very small things such as atoms, molecules and other particles in moles.
- 602,214,076,000,000,000,000,000 is called Avogadro's number, abbreviated as 6.02 x
Therefore, Volume in ml of 0.220 m hbr solution is required to produce 0.0170 moles is 77.27 mL.
To know more about Molality, visit:
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Answer:
it has plants and it has the best gravity
Explanation:
the reason why is because plants only exist on earth and and we have the best gravity because if we jump we don't jump to high like in other planets.
Answer:
B
Explanation:
Isotopy is a phenomenon in which there exists two or more kind of atoms of the same element. These atoms have the same number of protons but different mass numbers. That is, they have the same atomic number but differ only by the number of neutrons in the nucleus of the atom. Now, let us apply this information to the options individually:
A. Is wrong, they are not the same element
B. Is correct. they both belong to the same element hydrogen. Infact, they are named protium and deuterium respectively
C is wrong they are not same element
D is wrong They are not elements at all
E. Is wrong, one is an element, the other is a molecule
