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Vsevolod [243]
3 years ago
15

Please help i don’t understand it and i’ll give 56 points

Chemistry
1 answer:
netineya [11]3 years ago
8 0
(Its Out Of Order)
Is this beaker the appropriate tool for measuring volume? - No
Pic.2 What does each graduation line stand for? - 1 mL
Pic.3 What does each graduation line stand for? - 1 mL
Pic.4 What does each graduation line stand for? 50 mL

Now for the volume I can't tell you the answer as I can't see it well,but take a sticky note or a piece of paper and but it at the bottom of the curved line that the water makes in the beaker.The meniscus is where it should be.
The meniscus is the curved upper surface of a liquid in a tube.
Then you're get your answer make.
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Does lithium or potassium have a strong nuclear pull
saveliy_v [14]

Answer:

i believe it is lithium cause its is used for batteries and potassium is in like foods right? lmk if im wrong

and potassium helps to protect from radiation

Explanation:

7 0
3 years ago
Help me pls
harkovskaia [24]

Answer:

this is answers to the second picture

Explanation:

1-   energy

2- structure

3- reaction

4- substance

5- reactants

6- products

7- changed

8- At first there is no reaction because of the protective oxide coating on the aluminum. But soon an exothermic reaction between bromine and aluminum causes brown fumes of bromine to be given off. But as a new substance, aluminum bromide is produced. White smoke is produced.

9-   heated to 120 degrees Celsius it melts and first forms a pale-yellow liquid.

In this form the atoms are covalently bonded, and the liquid can flow easily. However, heated up beyond 150 degrees Celsius, the result is a dark red

10- When a chemical change occurs it is more difficult to revert the substance back to its original state. (To be honest I don't know)

3 0
3 years ago
Which element forms the skeleton of this polymer?
WINSTONCH [101]

Answer:

Carbon?

Explanation:

4 0
3 years ago
Aluminum reacts with iron nitrate to form aluminum nitrate and iron. What is the
Lelechka [254]
The reactants are aluminum and iron nitrate.
5 0
2 years ago
describe in general terms an experiment to determine the molal freezing point depression constant kf of water. Assume the availa
Dvinal [7]
A solution (in this experiment solution of NaNO₃) freezes at a lower temperature than does the pure solvent (deionized water). The higher the solute concentration (sodium nitrate), freezing point depression of the solution will be greater.
Equation describing the change in freezing point: 
ΔT = Kf · b · i.
ΔT - temperature change from pure solvent to solution.
Kf - the molal freezing point depression constant.
b -  molality (moles of solute per kilogram of solvent).
i - Van’t Hoff Factor.
First measure freezing point of pure solvent (deionized water). Than make solutions of NaNO₃ with different molality and measure separately their freezing points. Use equation to calculate Kf.

6 0
3 years ago
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