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3 years ago

86.64 g LiBr mol LiBr

Chemistry

2 answers:

beks73 [17]3 years ago

8 0

Answer:

86.64 no es livr mol libr

Explanation:

Otrada [13]3 years ago

6 0

Explanation:

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Consider the reaction between iron (III) oxide, Fe2O3 and carbon monoxide, CO.

Lana71 [14]

Fe2O3 + 3CO --> 2Fe + 3CO2

m(Fe2O3)=213 g
m(CO)=140 g
_______________

n(Fe2O3)=?
m(Fe)=?
n(Fe2O3)=?
n(CO)=?
n(CO2)=?

n(Fe2O3)=m(Fe2O3) / M(Fe2O3)
n(Fe2O3)= 213 g / 159,7 gmol-1 = 1,33 mol

n(CO)= m(CO) / M(CO) n(CO)= 140 g / 28,01 gmol-1 = 4,99 mol

3 0

3 years ago

How many atoms are in each elemental sample?

Gnesinka [82]

Answer:

A. 2.9*10^24

B. 3.4*10^21

C. 1.2*10^25

D. 1.7*10^23

Explanation:

1 mol of any particle has 6.02*10^23.

A. 4.8 mol Cu* 6.02*10^23 (1/mol) ≈2.9*10^24

B. 5.6x10^-3 mol C *6.02*10^23 (1/mol) ≈3.4*10^21

C. 20.0 mol Hg*6.02*10^23 (1/mol)≈1.2*10^25

D. 0.285 mol Na*6.02*10^23 (1/mol)≈1.7*10^23

3 0

4 years ago

Would you be consider fire to be living or non-living?

Grace [21]

Answer:

non-living

Explanation:

3 0

3 years ago

Do you expect the O---O bond in H2O2 to be longer or shorter than the O---O bond in O2?

melomori [17]

Answer : The O-O bond in $H_2O_2$ will be longer than the O-O bond in $O_2$ .

Explanation :

In the $H_2O_2$ , the two oxygen atoms are bonded by the single bond and in $O_2$ , the two oxygen atoms are bonded by the double bond.

As we know, the bond strength of double bond is greater than the single bond.

And the relation between the bond strength and bond length is,

$\text{ Bond strength}\propto \frac{1}{\text{ Bond length}}$

That means the higher the strength, the shorter will be the bond length.

Hence, the bond length of single bond will be longer than the double bond.

The structure of given molecule is shown below.

8 0

4 years ago

What is the pH of an acetic acid solution where the concentration of acetic acid is 2 mM and the concentration of sodium acetate

schepotkina [342]

Answer:

pH = 5.76

Explanation:

We can solve this problem by using Henderson-Hasselbach's equation:

pH = pKa + log $\frac{[SodiumAcetate]}{[AceticAcid]}$

We are already know all the required information, thus we input the data given by the problem:

pH = 4.76 + log(20/2)

And finally calculate the pH:

pH = 5.76

The pH of that acetic acid solution is 5.76.

6 0

3 years ago