calculate the number of molecules in 30g water
H2O = 2 + 16 = 18 grams / mol
30/18 = 1.67 mol
1.67 * Avagadro's number
1.67 * 6.022 * 10^23
= 1.004 *10^24 molecules
which is quite a few
Ah, I see you're thirsty for some molecular humor! Well, to calculate the number of molecules in 30g of water, we need to do some chemistry clowning around.
Now, the molar mass of water (H2O) is approximately 18 grams per mole. So, to calculate the number of molecules, we need to know a little chemistry trick. In one mole of any substance, there are approximately 6.022 x 10^23 molecules, called Avogadro's number. It's quite a handful!
So, let's juggle the numbers. We divide the mass of water (30g) by its molar mass (18g/mol) to find the number of moles. In this case, we get 1.67 moles of water.
Now, since there are approximately 6.022 x 10^23 molecules in one mole, we can multiply the number of moles by Avogadro's number to get the final answer. So, drumroll, please...
In 30g of water, there's approximately 1.67 x 6.022 x 10^23 molecules, or 1 x 10^24 molecules of H2O. That's an ocean of molecules!
Remember, this is just an estimation, as molecules tend to swim around and play hide-and-seek.
To calculate the number of molecules in 30g of water, you will need to follow these steps:
Step 1: Calculate the number of moles of water:
To do this, you need to know the molar mass (or molecular weight) of water, which is approximately 18.015 g/mol.
Number of moles of water = Mass of water (in grams) / Molar mass of water
In this case, the mass of water is given as 30g:
Number of moles of water = 30g / 18.015 g/mol
Step 2: Calculate the Avogadro's number:
Avogadro's number (Nₐ) is the number of particles (atoms, molecules, or ions) in one mole of a substance. It is approximately 6.022 x 10²³ particles/mol.
Step 3: Calculate the number of molecules:
To calculate the number of molecules in the given mass of water, you need to multiply the number of moles of water by Avogadro's number:
Number of molecules = Number of moles of water * Avogadro's number
Now, let's plug in the values and calculate the result:
Number of molecules = (30g / 18.015 g/mol) * (6.022 x 10²³ molecules/mol)
Number of molecules ≈ 1.004 x 10²⁴ molecules
Therefore, there are approximately 1.004 x 10²⁴ molecules in 30g of water.
To calculate the number of molecules in 30g of water, we need to use the concept of molar mass and Avogadro's number.
1. Determine the molar mass of water: The molar mass of water (H2O) can be calculated by adding up the atomic masses of its constituent atoms. The atomic mass of hydrogen (H) is approximately 1 gram per mole (g/mol), and the atomic mass of oxygen (O) is about 16 g/mol. Since there are two hydrogen atoms and one oxygen atom in a water molecule, the molar mass of water is (2 * 1) + 16 = 18 g/mol.
2. Convert grams to moles: We can use the molar mass to convert the given mass of water (30g) into moles. To do this, divide the mass of water by its molar mass.
Moles = Mass / Molar mass
Moles = 30g / 18 g/mol
The grams unit cancels out, and the result is the number of moles of water.
3. Calculate Avogadro's number: Avogadro's number represents the number of particles (atoms, molecules, or ions) in one mole of substance. It is approximately equal to 6.022 × 10^23 particles per mole.
4. Determine the number of molecules: To find the number of water molecules, multiply the number of moles of water by Avogadro's number.
Number of molecules = Moles * Avogadro's number
Now, let's calculate it.
Number of moles = 30g / 18 g/mol = 1.67 moles (approximately)
Number of molecules = 1.67 moles * 6.022 × 10^23 molecules/mol
Therefore, there are approximately 1.0 × 10^24 molecules in 30g of water.