Question

How many miles are present in 4.6g of Na.
[Na = 23u]​

Answer 1

Step-by-step explanation:

How many miles

Look on your periodic table. You’ll see that Sodium has a molar mass of 23 grams/mole. This is a really helpful ratio. You can write as 23g/mole or 1mole/23 grams.

In this specific problem you take your given from the problem which is 4.6g and you multiply it by the molar ratio.

(4.6gNa)∗1mole/(23gNa) You’ll notice that the units of grams will cancel out and moles will be on the top and that gives you 4.6/23 or 0.2 Moles. Do a gut check. If it takes 23 grams to make 1 mole and you have only 4 grams, you’re going to have much less than 1 mole. So this answer makes sense.

Answer 2

Aɴsᴡᴇʀ:

• The required number of moles = 0.2 moles

Gɪᴠᴇɴ:

• The given mass is 4.6g and the given molar mass is 23u.

Nᴇᴇᴅ ᴛᴏ ғɪɴᴅ:

• The required number of moles =

Solution:

Fᴏʀᴍᴜʟᴀ ᴜsᴇᴅ ʜᴇʀᴇ:

• Number of moles = Mass/Molar mass

Pᴜᴛᴛɪɴɢ ᴛʜᴇ ᴠᴀʟᴜᴇs:

➦ Required number of moles = 4.6/23

➦ Required number of moles = 46 / 23 × 10

➦ Required number of moles = 2/10

➦ Required number of moles = 0.2 moles

Tʜᴇʀᴇғᴏʀᴇ:

• The required number of moles is 0.2 moles.

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