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fenix001 [56]
3 years ago
5

Which one of the following is not a compound?

Chemistry
2 answers:
DaniilM [7]3 years ago
8 0

Answer:

Marble.

Explanation:

Novay_Z [31]3 years ago
5 0

it's answer a) marble.

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20.0 g of bromic acid, HBrO3, is reacted with excess HBr.
Blababa [14]

After Rounding off The percentage yield is 64%

<h3>What is Percentage Yield ?</h3>

It is the ratio of actual yield to theoretical yield multiplied by 100% .

It is given in the question

20.0 g of bromic acid, HBrO3, is reacted with excess HBr.

The reaction is

HBrO₃ (aq) + 5 HBr (aq) → 3 H₂O (l) + 3 Br₂ (aq)

Actual yield = 47.3 grams

Molecular weight of Bromic Acid is 128.91 gram

Moles of Bromic Acid = 20/128.91 = 0.155 mole

Mole fraction ratio of Bromic Acid to Bromine is 1 :3

Therefore for 0.155 mole of Bromic Acid 3 * 0.155 = 0.465 mole of Bromine is produced.

1 mole of Bromine = 159.8 grams of Bromine

0.465 of Bromine = 74.31 grams of Bromine

Percentage Yield = (47.3/74.31)*100 = 63.65 %

After Rounding off The percentage yield is 64% .

To know more about Percentage Yield

brainly.com/question/22257659

#SPJ1

5 0
1 year ago
I need help with the first question
gregori [183]
Zn⁰ ----> Zn⁺²   +   2e⁻ -  oxidation
Hg⁺² + 2e⁻ ----> Hg⁰ - reduction

Zn loses 2 moles of electrons , and Hg gains 2 mole of electrons.
So, number of moles of electrons gained and lost during reaction is equal.

7 0
3 years ago
The alkline earth metals include?
patriot [66]

Answer:

The Popular ones are five in number

Explanation:

Calcium

Silicon

Germanium

Tin

Lead

5 0
3 years ago
how does one describe the degree of saturation in terms of polarity and amounts of solutes and solvent
Svet_ta [14]
Like dissolves Like.
7 0
3 years ago
U
Vlada [557]

Answer:

7.86 moles of sodium chloride are produced.      

Explanation:

Given data:

Moles of chlorine = 3.93 mol

Amount of sodium = excess

Moles of sodium chloride formed = ?

Solution:

Chemical equation:

2Na + Cl₂     →     2NaCl

Now we will compare the moles of sodium chloride with chlorine.

                       Cl₂           :          NaCl

                          1            :            2

                        3.93        :           2×3.93 = 7.86

Chlorine is limiting reactant that's why we compare the NaCl with only number of mole of chlorine.

Thus, 7.86 moles of sodium chloride are produced.      

5 0
3 years ago
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