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Greeley [361]
3 years ago
6

What is the density of a 25.8 g piece of broken glass that has a volume of 10.3 cm cubed

Chemistry
1 answer:
anygoal [31]3 years ago
4 0

Answer:

2.5

Explanation:

d=m/v

d=25.8÷10.3

d=2.5048543689

d=2.5

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The correct labels for the numbers in Figure 7-1 are (1) ____________________, (2) ____________________, and (3) _______________
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Answer:

A horizon, B horizon, C horizon .

6 0
3 years ago
Calculate the theoretical yield for the bromination of both stilbenes
podryga [215]

Answer:

cinnamic acid - 150 mg

cis-stilbene - 100 μL

trans- stilbene - 100 mg

pyridinium tribromide - 200-385 mg

For this data:

moles of cinnamic acid = 0.150 g/148.16 g/mol = 0.001 mols

Theoretical mass of dibromoproduct formed = 0.001 mol x 307.97 g/mol = 0.312 g

cis-stilbene (100 ul = 0.1 ml)

moles of cis-stilbene = 0.1 ml x 1.01 g/mol/180.25 g/mol = 0.00056 mols

Theoretical mass of dibromoproduct formed = 0.00056 mol x 340.05 g/mol = 0.19 g

trans-stilbene

moles of tran-stilbene = 0.1 g/180.25 g/mol = 0.00055 mols

Theoretical mass of dibromoproduct formed = 0.00055 mol x 340.05 g/mol = 0.19 g

Explanation:

4 0
2 years ago
when performing solubility studies, why you should use deionized or distilled water rather than tap water?
Cerrena [4.2K]

Answer:

The science project or the proposed test using the water as a control element in the experiment determines whether you choose to use deionized water or distilled water. Of the two, distilled water is the purest because the water undergoes boiling that kills off most organic contaminants.

Explanation:

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5 0
2 years ago
If you dilute 250 mL of 6.4 M lithium acetate solution to a volume of 750 mL, what will the concentration of this solution be?
Tresset [83]
The answer would be 1006.4
3 0
3 years ago
Assume that the heat lost by the surface is gained by ethyl chloride. What enthalpies must you consider if you were to calculate
Ann [662]

Answer:

Specific heat of ethyl chloride in gas and liquid phases, enthalpy of vaporization and specific heat of solid surface.

Explanation:

In order to determine the final temperature, the heat lost by the chloride needs to be found. This would require the specific heat in both phases and the enthalpy of vaporization. (you will use q=mc(delta)T and q=m(delta)H)

Then the energy gained by the surface needs to be found. This will require the specific heat in order to use the q=mc(delta)T equation.

3 0
3 years ago
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