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rosijanka [135]
3 years ago
7

When molybdate (MoO3) and Zinc (Zn) are heated together they react in this equation:

Chemistry
1 answer:
schepotkina [342]3 years ago
5 0

Answer: The mole ratio of Zn to ZnO is 3: 3.

Explanation:

According to law of conservation of mass, mass can be neither be created nor be destroyed. The mass on reactant side must be equal to the mass on product side. Thus the atoms of each element on both side of the reaction must be same.

The balanced chemical reaction is:

3Zn+2MoO_3\rightarrow Mo_2O_3+3ZnO

Here 3 moles of Zn combine with 2 moles of MoO_3 to give 1 mole of Mo_2O_3 and 3 moles of ZnO. Thus the mole ratio of Zn to ZnO is 3: 3.

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Calculate the % composition of the unknown liquid using your most precise result. It is a mixture of ethanol (D[ETOH] = 0.7890 g
Rufina [12.5K]

% composition of ethanol = 34.51%

% composition of water  = 65.49%

<h3>What is density?</h3>

A material's density is defined as its mass per unit volume.

Given data:

The density of ethanol = 0.7890 g/mL

The density of water = 0.9982 g/mL

The density of mixture = 0.926 g/mL

Let the % composition of ethanol = x

Let the % composition of water = 100-x

Now density of the mixture

\frac{Mass}{Volume}

Mass = \frac{percent  \;of  \;ethanol  \;X  \;density  \;of  \;ethanol  \;+  \\ \;percent  \;of  \;water X  \;density  \;of  \;water}{100}

0.926 = \frac{x X  0.7890 g/mL  \;+  (100-x) X  0.9982 g/mL}{100}

x= 34.51 %

Hence,

% composition of ethanol = 34.51%

% composition of water = 65.49%

Learn more about the density here:

brainly.com/question/952755

#SPJ1

8 0
2 years ago
Amy is in a car moving quickly toward a stationary siren. Just as Amy moves
sineoko [7]

Answer:

Pitch

Explanation:

5 0
3 years ago
the smell spreads immediately after you burn agarbatti in this example what is your condition about intermolecular force
Sloan [31]
Intermolecular force for solids is high. Whereas low in gases. The smell of agarbatti spreads immediately because the molecules of air diffuses very fastly.
4 0
3 years ago
Read 2 more answers
236U &gt;33 Np+ ____? <br> 92<br> help plzzzzz
anygoal [31]

Answer:

1

Explanation:

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5 0
3 years ago
N the reaction 2Cu2O(s) → 4Cu(s) + O2(g) how does the oxidation number of the copper atoms change
Usimov [2.4K]

Answer: The oxidation number of Cu decreased

Explanation: In Cu2O equation Cu has an oxidation number of

Cu+1 O-2

then in the product side Cu is represented as a single element.

The rule on oxidation number for an individual element is always O

So Cu has 0 oxidation number.

8 0
3 years ago
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