3 years ago

Atomic number and mass of O

Chemistry

2 answers:

Vanyuwa [196]3 years ago

7 0

Atomic number is 8 and atomic mass is taken as 16 amu

lesya692 [45]3 years ago

3 0

Atomic number is 8 and atomic mass is taken as 16 amu

You might be interested in

The balanced equation for the reaction of aqueous Pb(ClO3)2 with aqueous NaI is Pb(ClO3)2(aq)+2NaI(aq)⟶PbI2(s)+2NaClO3(aq) What

ryzh [129]

Answer : The mass of $PbI_2$ precipitate produced will be, 9.681 grams.

Explanation : Given,

Molarity of NaI = 0.210 M

Volume of solution = 0.2 L

Molar mass of $PbI_2$ = 461.01 g/mole

First we have to calculate the moles of $NaI$ .

$\text{Moles of }NaI=\text{Molarity of }NaI\times \text{Volume of solution}=0.210M\times 0.2L=0.042moles$

Now we have to calculate the moles of $PbI_2$ .

The balanced chemical reaction is,

$Pb(ClO_3)_2(aq)+2NaI(aq)\rightarrow PbI_2(s)+2NaClO_3(aq)$

From the balanced reaction we conclude that

As, 2 moles of $NaI$ react to give 1 mole of $PbI_2$

So, 0.042 moles of $NaI$ react to give $\frac{0.042}{2}=0.021$ moles of $PbI_2$

Now we have to calculate the mass of $PbI_2$ .

$\text{Mass of }PbI_2=\text{Moles of }PbI_2\times \text{Molar mass of }PbI_2$

$\text{Mass of }PbI_2=(0.021mole)\times (461.01g/mole)=9.681g$

Therefore, the mass of $PbI_2$ precipitate produced will be, 9.681 grams.

6 0

3 years ago

Please choose the answer that describes the Scientific notation of 5,089,000

creativ13 [48]

This number in scientific notation is 5.089(10^6).

5 0

2 years ago

Why do we use scientific notation or scientific exponential numbers in math calculations?

seraphim [82]

I believe the answer is: in order not to write very big or very small number values

6 0

3 years ago

The positively charged particles found in the nucleus of an atom are called ______.

Vikentia [17]

The answer is (c) protons

4 0

3 years ago

What does C represent

zimovet [89]

Answer: the distance of energy from point d to e

8 0

2 years ago

Read 2 more answers