3 years ago

I REALLY NEED HELP PLZZZZZ!!!!!

Chemistry

2 answers:

Mrac [35]3 years ago

6 0

Answer:

Visible Light

Explanation:

leonid [27]3 years ago

5 0

Answer:

I believe that the answer is visible light

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A block of aluminum occupies a volume of 15.0 cm and weighs 40.5 g. What is its density?

mafiozo [28]

Answer:

2.7 g/cm^3

Explanation:

D = m/V

D = 40.5 g / 15 cm^3

D = 2.7 g/cm^3

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3 years ago

A process stream contains 450 mol/s benzene and 375 mol/s toluene. Calculate the mole fraction of benzene in the process stream.

Tema [17]

Answer:

0.5455

Explanation:

The moles of benzene in the process stream in 1 sec = 450 moles

The moles of toluene in the process stream in 1 sec = 375 moles

So, according to definition of mole fraction:

$Mole\ fraction\ of\ benzene=\frac {n_{benzene}}{n_{benzene}+n_{toluene}}$

Applying values as:

$Mole\ fraction\ of\ benzene=\frac {450}{450+375}$

<u>Mole fraction of benzene in the process stream = 0.5455</u>

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4 years ago

Most common energy source in cellular respiration

topjm [15]

Answer: cytoplasm

Explanation:

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3 years ago

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How many grams of KC2H3O2 are needed to prepare 0.50L of a 6.00 M solution

lesantik [10]

GDK is the nyc gng so 1.20L

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3 years ago

What volume (cm 3 ) would 9.0 grams of aluminum occupy? Density is 2.7 g/cm 3 . Show your work

saul85 [17]

Answer:

3.3 cm³

Explanation:

Use the density formula, d = m/v, to solve for the volume:

2.7 = 9.0/v

2.7v = 9.0

v = 3.3 cm³

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4 years ago