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joja [24]
3 years ago
12

Which of the following statements about the density of the blue object is true?

Chemistry
1 answer:
beks73 [17]3 years ago
3 0

Answer:

the answer is A it just told me

Explanation:

the quiz told me the correct answer  

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If you don't reply with an actual answer I will report it and you will be reported and itll give me back my points
lapo4ka [179]
I think its number 5 
6 0
3 years ago
Zinc(II) sulfide reacts with oxygen according to the reaction: A reaction mixture initially contains 3.0 mol ZnS and 2.0 mol O2.
tiny-mole [99]

Answer:

Excess reagent is the ZnS. After the reaction is complete, 1.67 moles of sulfide remain.

Explanation:

This is the reaction to work with:

2ZnS + 3O₂  →  2ZnO + 2SO₂

Limiting reagent is the oxygen. We confirm it by a rule of three

2 moles of sulfide can react to 3 moles of O₂

Therefore 3 moles of ZnS will react to (3 . 3) / 2 = 4.5 moles (we need 4.5 moles of O₂ and we only have 2 moles, that's why the O₂ is the limiting)

Excess reagent is the zinc (II) sulfide

3 moles of oxygen react to 2 moles of ZnS

2 moles of O₂ will react to (2 . 2) / 3 = 1.33 moles of ZnS (it is ok, be cause we have 3 moles, and we need only 1.33)

After the reaction is complete ( 3 - 1.33) = 1.67 moles of sulfide remain.

6 0
3 years ago
Read 2 more answers
Explain why powdered milk and water do not<br>form a homogeneous mixture​
lara31 [8.8K]

Answer:

Milk, which when not subjected to temperature, is a homogeneous mixture. This is because- the various components of pure milk, which are the nutrients present in it, don't form separate layers in it and hence can’t be separated by any physical method.

But when milk is subjected to external factors, such as temperature, the milk fat no more remains dissolved in the milk but instead can be seen as a layer on the top-either as a white solid layer which is called as the cream or as yellow droplets. The two layers can be separated by physical means and hence making milk a heterogeneous mixture.

So the conclusion is that milk is a homogeneous mixture by default.

Explanation:

5 0
3 years ago
What is the mass of 0.7891 mol of ferric oxide (Fe,O3)?
Aleksandr [31]

Answer:

The answer to your question is letter B.

Explanation:

Process

1.- Calculate the molecular mass of Ferric oxide

Fe = 56g x 2 = 112 g

O  = 16 x 3 = 48 g

Mass = 112 + 48 = 160 g

2.- Calculate the mass of 0.7891 moles of Ferric oxide

                                160 g of Fe₂O₃ ------------- 1 mol

                                x                        ------------- 0.7891 mol

                                x =  (160 x 0.7891) / 1

                               x = 126.2 g

3 0
3 years ago
Read 2 more answers
Identify the strongest intermolecular force that is likely to affect each of the samples described below.
Delvig [45]

Answer:

London dispersion forces

Explanation:

3 0
3 years ago
Read 2 more answers
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