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2 years ago

(07.05 HC)

Chemistry

1 answer:

aivan3 [116]2 years ago

3 0

The concentration of the solution decreases hence the time taken for the cross to become invisible increases.

<h3>Rate of reaction</h3>

The term rate of reaction refers to how quickly or slowly a reaction occurs. This is usually measured in units of time. We are now going to look at the scenario in the question.

We know that rate of reaction depends on the concentration of the reactants. The higher the concentration, the more the reacting particles in solution and the faster the rate of reaction.

As the volume of thiosulphate decreases and the volume of water increases, the concentration of the solution decreases hence the time taken for the cross to become invisible increases.

Learn more about rate of reaction: brainly.com/question/8592296

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Gaseous ethane CH3CH3 reacts with gaseous oxygen gas O2 to produce gaseous carbon dioxide CO2 and gaseous water H2O. What is the

ololo11 [35]

Answer:

46.97g

Explanation:

Hello,

To find the theoretical yield, we must first of all get the equation of reaction right in order to know how the compounds combine together.

Equation of reaction;

2C₂H₆ + 7O₂ → 4CO₂ + 6H₂O

From the equation of reaction,

2 moles of C₂H₆ reacts with 7 moles of O₂ to produce 4 moles of CO₂.

Number of moles = mass / molar mass

Mass = number of moles × molar mass

Mass of CO₂ = 4 × 44 = 176g

Mass of C₂H₆ = 2 × 30 = 60g

Mass of O₂ = 7 × 32 = 224g

Therefore, 224g + 60g (O₂ + C₂H₆) = 176g of CO₂.

284g of reactants = 176g of product(CO₂)

(18 + 57.8)g of reactants = x g of products(CO₂)

X = (75.8 × 176) /284

X = 46.97g of CO₂.

Theoretical yield of CO₂ is 46.97g

8 0

3 years ago

Strontium metal reacts with aluminum chlorate to produce strontium

Fudgin [204]

Answer: single replacement reaction, $3Sr+2Al(ClO_3)_3\rightarrow 3Sr(ClO_3)_2+2Al$

Explanation:

A single replacement reaction is one in which a more reactive element displaces a less reactive element from its salt solution.

A general single displacement reaction can be represented as :

$XY+Z\rightarrow XZ+Y$

As strontium metal is added to aluminum chlorate , strontium being more reactive than aluminium, displaces aluminium atom its salt solution and lead to formation of strontium chlorate and aluminum metal.

$3Sr+2Al(ClO_3)_3\rightarrow 3Sr(ClO_3)_2+2Al$

3 0

2 years ago

Which one of the following is a pure substance? 1.milk2. Concrete3. Wood 4. Salt water5. Elemental copper

Sauron [17]

Elemental copper would be a pure substance.

5 0

3 years ago

what is the oxidation state of each element in coh2? c o h what is the oxidation state of each element in febr3? fe br

fgiga [73]

The oxidation state of the elements in the compounds are:

CoH₂:

Co = +2
H = -1

FeBr₃:

Fe = +3
Br = -1

<h3>What is the oxidation states of the elements in the given compounds?</h3>

The oxidation states of the elements in each of the given compounds is determined as follows:

Cobalt dihydride, CoH₂

Co = +2

H = -1

Iron (iii) bromide, FeBr₃

Fe = +3

Br = -1

In conclusion, the oxidation state of the elements are charges they have in the compound.

Learn more about oxidation state at: brainly.com/question/27239694

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2 years ago

The word elliptical refers to what type of shape?

Ilya [14]

The word elliptical refers to an Oval.

7 0

3 years ago

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