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1 year ago

Please help me thank you so much <3

Chemistry

2 answers:

aleksandr82 [10.1K]1 year ago

6 0

A i dolnt reaally know but yeh

mestny [16]1 year ago

5 0

Answer: B.

Explanation:

Onions are made of tons of small cells, while protists are unicellular, meaning that they only have one cell.

I hope this helps! :)

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Post-Lab Questions

Svet_ta [14]

Answer:

1. not enough dye was added to the drink.

The wrong dye was added to the drink

the water in the drink is evaporating

2. Changing the compound changes the absorbance behavior.

3. Measure the absorbance for the same solution in different cuvette sizes and find the y-intercept.

Explanation:

When the beverage company adds dye to the drink, there should be standard quantity added to the drink so that the color of the drink remains constant. When too much dye is added to the drink, the color will get dark brown or black. When the color of drink get lighter than green this means dye is not added in required quantity.

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2 years ago

Calculate the volume of a 0.225M solution of KOH required to react with 0.215g of acetic acid.

Sidana [21]

Hope this might help ask me if u have any doubts

7 0

2 years ago

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Please, I need at least accurate answers for my Sound Knowledge Check for my Science class.

Alla [95]

Answer:

1.A

2.A

3.C

4.C

5.B

6.A

5 0

3 years ago

Read 2 more answers

Which is a pure substance? A. sugar B. trail mix C. leaf salad D. sugar water

mote1985 [20]

A. Sugar... Because the others are mixes of things and combinations. Sugar is pure and on its own.

I hope this helps!

8 0

3 years ago

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What does Hess's law state can be done in order to be able to react solid magnesium with oxygen gas safely (that is, without exp

aleksley [76]

Answer:

C. The reaction can be broken down and performed in steps

Explanation:

Hess's Law of Constant Heat Summation states that irrespective of the number of steps followed in a reaction, the total enthalpy change for the reaction is the sum of all enthalpy changes corresponding to all the steps in the overall reaction. The implication of this law is that the change of enthalpy in a chemical reaction is independent of the pathway between the initial and final states of the system.

To obtain MgO safely without exposing magnesium to flame, the reaction sequence shown in the image attached may be carried out. Since the enthalpy of the overall reaction is independent of the pathway between the initial and final states of the system, the sum of the enthalpy of each step yields the enthalpy of formation of MgO.

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2 years ago