313,844 views
19 votes
19 votes
Help me please I need the answer and a explanation on why it’s right

Help me please I need the answer and a explanation on why it’s right-example-1
User Faryal
by
2.8k points

1 Answer

15 votes
15 votes

Answer:

49.37 g

Step-by-step explanation:

So, Avogadro's number, which essentially acts as the definition of a mole, tells you that one mole of any ionic compound contains 6.022 × 10^23 formula units of that compound.

Remember that: one mole of any ionic compound contains 6.022 × 10^23 formula units

Step 1: You multiply the atoms of tellurium by 1 divided by the formula units

2.33 × 10^23 × 1 mole/6.022 × 10^23 formula units

= 0.386915 moles

Step 2: Find the molar mass of Tellurium

The molar mass of Tellurium is 270.60

Just search up the molar mass of Tellurium on Go.o.gle or look on a periodic table

Now we know that Tellurium has a molar mass of 127.60g. This means that every mole of Tellurium has a mass of 127.60g

Step 3: Next multiply the moles of Tellurium in step 1 by 127.60g divided by 1 mole

0.386915 moles × 127.60/1 mole

= 49.370354

49.37g

To check if this is correct

First Step: Mass or atoms→Moles

Step 1: To calculate the atoms of Tellurium, multiply the given grams by the reciprocal of the molar mass.

49.37g × 1 mol/270.60

= 0.386912 mol

Second Step: Moles→Atoms

Step 2: To calculate atoms of Tellurium, multiply moles Tellurium by Avogadro's number.

0.386912 mol × 6.022 × 10^23/ 1 mol

= 2.3299840639999997e+23

But the actual answer is 2.3299840639999997 rounded to the nearest hundredth or as other people may call it round to four significant figures

2.3299840639999997 rounded = 2.33

So the atoms of Tellurium is 2.33 × 10^23

So the answer "49.37g" is correct

.

Help me please I need the answer and a explanation on why it’s right-example-1
Help me please I need the answer and a explanation on why it’s right-example-2
Help me please I need the answer and a explanation on why it’s right-example-3
Help me please I need the answer and a explanation on why it’s right-example-4
Help me please I need the answer and a explanation on why it’s right-example-5
User Feroz Khan
by
3.3k points