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3 years ago

Which factors are needed to determine the amount of heat absorbed by an aluminum cube after it is warmed?

Chemistry

1 answer:

xxMikexx [17]3 years ago

3 0

Answer:

final temperature of the cube

initial temperature of the cube

mass of the cube

specific heat of aluminum

Explanation:

Let me know if you need any other help:)

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In a crystal lattice of an ionic compound,

Lena [83]

Answer:

i would try B

Explanation:

6 0

3 years ago

The four sets of lines in the hydrogen emission spectrum are known as Balmer, Brackett, Paschen, and Lyman. For each series, ass

arlik [135]

Answer:

Hydrogen spectrum

Explanation:

Balmer series - Observed in the visible region

Brackett series - Observed in the infrared region

Paschen series - Observed in the infrared region

Lyman series - Observe in the Ultraviolet region.

8 0

3 years ago

If 12.5 grams of the original sample of cesium-137 remained after 90.6 years, what was the mass of the original sample?

myrzilka [38]

Answer:

Mass of original sample = 100 g

Explanation:

Half life of cesium-137 = 30.17 years

$t_{1/2}=\frac {ln\ 2}{k}$

Where, k is rate constant

So,

$k=\frac{\ln2}{t_{1/2}}$

$k=\frac{\ln2}{30.17}\ year^{-1}$

The rate constant, k = 0.02297 year⁻¹

Time = 90.6 years

Using integrated rate law for first order kinetics as:

$[A_t]=[A_0]e^{-kt}$

Where,

$[A_t]$ is the concentration at time t

$[A_0]$ is the initial concentration

Initial concentration $[A_0]$ = ?

Final concentration $[A_t]$ = 12.5 grams

Applying in the above equation, we get that:-

$12.5\ g=[A_0]e^{-0.02297\times 90.6}$

$[A_0]=\frac{12.5}{e^{-0.02297\times 90.6}}\ g=100\ g$

Mass of original sample = 100 g

8 0

3 years ago

Photosynthesis and glucose metabolism are able to use energy from the sun or glucose molecules to push hydrogen ions against the

Gala2k [10]

Answer:

Osmosis

Explanation:

The osmosis is a movement from somewhere with a lower concentration of a substance to somewhere with a higher concentration of the same substance. Against the concentration gradient. It occurs through a semi permeable membrane which prevents a non desired substance cross it. Also, it's very important to biological process.

7 0

3 years ago

All molecules are made up of: A)hydrogen B)minerals C)atoms D)gas

masya89 [10]

answer c atoms

i think that is correct

4 0

3 years ago

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