How many moles of boron are in 1.39x10^24 atoms

The current federal agency responsible for safety-related issues of nuclear energy is the:

Masja [62]

The answer is C Nuclear Regulatory Commission

4 0

4 years ago

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Identify the products formed in the net reaction of the electrolysis of water.

Marat540 [252]

Answer:

The answer is hydrogen gas and oxygen gas

Explanation:

8 0

3 years ago

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A certain liquid X has a normal boiling point of 133.60°C and a boiling point elevation constant Kb= 2.46°C kg mol^-1.Calculate

Afina-wow [57]

Answer:

136.63 °C

Explanation:

ΔTb=Tb solution - Tb pure

Where; Tb pure = 133.60°C

molar mass of solute = 121.14 g/mol

number of moles of solute; 52.2g/121.14 g/mol = 0.431 moles

molality = 0.431 moles/350 * 10^-3 = 1.23 molal

Then;

ΔTb = Kb * m * i

Kb = 2.46°C kg mol^-1

m = 1.23 molal

i = 1

ΔTb = 2.46 * 1.23 * 1

ΔTb = 3.03 °C

Hence;

Tb solution = ΔTb + Tb pure

Tb solution = 3.03 °C + 133.60°C

Tb solution = 136.63 °C

6 0

3 years ago

How many total electrons are in the Pb^4+ ion? A. 82 B.86 C.78

pickupchik [31]

Answer:

$82$

4 0

3 years ago

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I am a subatomic particle that is positively charged what am I?

lions [1.4K]

The right answer is Proton.

Additional Information:

There are three types of subatomic particles. They are:

Proton
Electron
Neutron

Proton is a positively charged particle,Electron is negatively charged particle and Neutron is charge less.

Hope it will be helpful to you...

6 0

3 years ago