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3 years ago

15-20 POINTS IF YOU ANSWER CORRECTLY & ADDED BRAINIEST

Chemistry

2 answers:

Helen [10]3 years ago

7 0

Answer:

2 8 5

Is phosphorus normal ground state configuration this configuration 2 7 5 is not possible for phosphorus or potassium

Explanation:

Sindrei [870]3 years ago

3 0

Answer:

D) Potassium and is in the excited state.

Explanation:

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The air bags in cars are inflated when a collision triggers the explosive, highly exothermic decomposition of sodium azide (NaN3

Oksanka [162]

Answer : The mass of $NaN_3$ required is, 166.4 grams.

Explanation :

First we have to calculate the moles of nitrogen gas.

Using ideal gas equation:

$PV=nRT$

where,

P = Pressure of $N_2$ gas = 1.00 atm

V = Volume of $N_2$ gas = 113 L

n = number of moles $N_2$ = ?

R = Gas constant = $0.0821L.atm/mol.K$

T = Temperature of $N_2$ gas = $85^oC=273+85=358K$

Putting values in above equation, we get:

$1.00atm\times 113L=n\times (0.0821L.atm/mol.K)\times 358K$

$n=3.84mol$

Now we have to calculate the moles of sodium azide.

The balanced chemical reaction is,

$2NaN_3(s)\rightarrow 2Na(s)+3N_2(g)$

From the balanced reaction we conclude that

As, 3 mole of $N_2$ produced from 2 mole of $NaN_3$

So, 3.84 moles of $N_2$ produced from $\frac{2}{3}\times 3.84=2.56$ moles of $NaN_3$

Now we have to calculate the mass of $NaN_3$

$\text{ Mass of }NaN_3=\text{ Moles of }NaN_3\times \text{ Molar mass of }NaN_3$

Molar mass of $NaN_3$ = 65 g/mole

$\text{ Mass of }NaN_3=(2.56moles)\times (65g/mole)=166.4g$

Therefore, the mass of $NaN_3$ required is, 166.4 grams.

3 0

3 years ago

When 0.1M HCl is added to the following system at equilibrium: AgCl(s) Ag+ (aq)+ Cl– (aq) the point of equilibrium will shift to

hichkok12 [17]

Le Chatelier's Principle says that when something disrupts the equilibrium, the system adjusts to minimize the effect of that disturbance. If 0.1 M HCl solution is added, this dissociates into H+ and Cl- ions, so there will be more Cl- ions in the system. This causes the reaction to go in the reverse direction (equilibrium shifts to the left) to reduce the amount of Cl-.
Since this also consumes Ag+ ions, the concentration of Ag+ (aq) will decrease.
The answer is the second choice.

5 0

3 years ago

Ethylene glycol (C2H6O2) is used as an antifreeze in cars. If 450 g of ethylene glycol is added to 4.25 kg of water, what is the

slamgirl [31]

cccccccccccccccccccccccccccccccccccccc

3 0

3 years ago

Why is burning wood considered a chemical change instead of a physical change? (Evidence pleaseee)

Mademuasel [1]

Burning wood is a chemical change and not a physical change because the carbon reacts with the oxygen, and that creates ash and smoke, you cannot undo ash and smoke, so therefore, it's only a chemical change

3 0

4 years ago

Read 2 more answers

A light particle has the wavelength of 426.2 nm. what is the wavelength in meters

babymother [125]

Answer:

0.0000004262m

Explanation:

i just looked up a converter.

5 0

3 years ago

*15-20 POINTS IF YOU ANSWER CORRECTLY & ADDED BRAINIEST*

15-20 POINTS IF YOU ANSWER CORRECTLY & ADDED BRAINIEST