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3 years ago

This answer please :)

Chemistry

1 answer:

Artemon [7]3 years ago

5 0

Answer:

ithink it is c but i dont my ghess

Explanation:

i want to do thos for the points tbh

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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

Why phenolphthalein is used in experiment?

Dominik [7]

In an acid-base titration, the neutralization reaction between the acid and base can be measured with either a color indicator or a pH meter. In this experiment, aphenolphthalein color indicator will be used.
Phenolphthalein is colorless in acidic solutions and pink in basic solutions.
Hope this helped
: )

4 0

3 years ago

35 cm3 of a metal has a mass of 121 grams. whats is its density?

dusya [7]

Answer:

The density of the metal is 3.457 g/cm³.

Explanation:

Given,

mass of metal = 121 grams

Volume = 35 cm³.

Density = ?

Density of the metal can be found by using the formula

Density = Mass/Volume

Substituting the values,

Density = 121/35 = 3.457 g/cm³.

5 0

3 years ago

The tiny particles that make up elements are called atoms. True False

raketka [301]

True.
where the atom is the smallest (tiny) particle of an element, the atom may be neutral or ionized, and its size is around 100 picometers. The atom composed of a nucleus and one or more electrons (negative charge) bound to the nucleus, the nucleus contains protons (positive charge) and neutrons.

7 0

3 years ago

Read 2 more answers

Which shows how much electron is in the outer layer

Elena L [17]

Answer:

is there a picture or is it multiple choice?

4 0

3 years ago