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3 years ago

The oxidation number of magnesium in magnesium chloride is _____.

Chemistry

1 answer:

LenaWriter [7]3 years ago

3 0

I hope this would be able to help u
dont forget the symbol its +2

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3 years ago

A sample of N2 gas in a flask is heated from 27 Celcius to 150 Celcius. If the original gas is @ pressure of 1520 torr, what is

Romashka [77]

Answer:

$\large \boxed{\text{B.) 2.8 atm}}$

Explanation:

The volume and amount are constant, so we can use Gay-Lussac’s Law:

At constant volume, the pressure exerted by a gas is directly proportional to its temperature.

$\dfrac{p_{1}}{T_{1}} = \dfrac{p_{2}}{T_{2}}$

Data:

p₁ = 1520 Torr; T₁ = 27 °C

p₂ = ?; T₂ = 150 °C

Calculations:

(a) Convert the temperatures to kelvins

T₁ = ( 27 + 273.15) K = 300.15 K

T₂ = (150 + 273.15) K = 423.15 K

(b) Calculate the new pressure

$\begin{array}{rcl}\dfrac{1520}{300.15} & = & \dfrac{p_{2}}{423.15}\\\\5.064 & = & \dfrac{p_{2}}{423.15}\\\\5.064\times423.15&=&p_{2}\\p_{2} & = & \text{2143 Torr}\end{array}\\$

(c) Convert the pressure to atmospheres

$p = \text{2143 Torr} \times \dfrac{\text{1 atm}}{\text{760 Torr}} = \textbf{2.8 atm}\\\\\text{The new pressure reading will be $\large \boxed{\textbf{2.8 atm}}$}$

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3 years ago

How did rutherford know that the nucleus was positively charged?

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3 years ago

suppose you are testing the buoyancy of different objects . study the table and choose object with the greatest buoyant force

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I hope that helped with what you're doing.
You can also try water displacement in a graduated cylinder.</span>

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3 years ago

PLEASE HELP ME !!!!!!

Leviafan [203]

Answer: b

Explanation:

By adding heat you are adding more energy

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4 years ago

Read 2 more answers