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4 years ago

12

If gas is $4.00/gal, how much does it cost to travel from Portland, Maine, to Orlando, Florida (a distance of 1,500 mi)? Give yo

ur answer to the nearest whole dollar.

2 answers:

AlexFokin [52]4 years ago

6 0

it cost $200 , the answer is not $6000

scZoUnD [109]4 years ago

3 0

Answer:

200

Explanation:

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The little number you see to the right of the symbol for an element is called a subscript.

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3 years ago

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

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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

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3 years ago

How does the arrangement of atoms in a crystalline substance differ from the arrangement in a noncrystalline (amorphous) substan

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Answer:

4. Atoms in crystals are in an ordered array. In amorphous materials, they are randomly distributed.

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3 years ago

What type of reaction is BaCl2 + Na2SO4 → 2NaCl + BaSO4?

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Answer:

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Explanation:

BaCl2 + Na2SO4 → 2NaCl + BaSO4

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3 years ago