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3 years ago

11

Many systems and technologies have been designed to communicate over long distances. They all send information that has been enc

oded into a signal. What must a receiver be able to do to understand a signal that is being sent to them?

2 answers:

blagie [28]3 years ago

4 0

The person above above above me is very very good awnswer hope this helps

velikii [3]3 years ago

4 0

The person above me is a very good person hope this helps.

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Which one of the following would you expect to dissolve in water? limonene sucrose oil atmospheric oxygen none of the above

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3 years ago

5) Calculate the molality of 0.210 mol of KBr dissolved in 0.075kg pure<br> water?

Margaret [11]

Answer:

$\boxed {\boxed {\sf 2.8 \ m }}$

Explanation:

The formula for molality is:

$m=\frac{moles \ of \ solute}{kg \ of \ solvent}$

There are 0.210 moles of KBr and 0.075 kilograms of pure water.

$moles= 0.210 \ mol \\kilograms = 0.075 \ kg$

Substitute the values into the formula.

$m= \frac{ 0.210 \ mol }{0.075 \ kg}$

Divide.

$m= 2.8 \ mol/kg= 2.8 \ m$

The molality is <u>2.8 moles per kilogram</u>

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3 years ago

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Forests are the only carbon sinks on Earth. Please select the best answer from the choices provided T F

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How many atoms are there in 24 moles of Fe?

Semenov [28]

Answer: There are $145 \times 10^{23}$ atoms in 24 moles of Fe.

Explanation:

According to the mole concept, 1 mole of a substance contains $6.022 \times 10^{23}$ atoms.

Therefore, atoms present in 24 moles of Fe are calculated as follows.

$24 mol \times 6.022 \times 10^{23} atoms/mol\\= 144.52 \times 10^{23} atoms\\or, 145 \times 10^{23} atoms$

Thus, we can conclude that there are $145 \times 10^{23}$ atoms in 24 moles of Fe.

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3 years ago