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Anon25 [30]
2 years ago
6

A balloon filled with air has a volume of 4.24 liters at 23.00°

Chemistry
2 answers:
Aliun [14]2 years ago
7 0

pV = nRT, or V = \frac{nRT}{p}, with p - pressure, V - volume, n - amount of substance, T - temperature in K.

Then: \frac{V_2}{V_1} = \frac{n_2RT_2p_1}{p_2n_1RT_1}

n_2 = n_1, p_2 = p_1

V_2 = V_1 \cdot \frac{T_2}{T_1} = 4.24 \frac {(273.00+5.00)}{(273.00+23.00)}=3.98 l

meriva2 years ago
6 0

The  new volume  if the balloon is cooled at constant pressure  is  3.98 L


 <u><em>Explanation</em></u>

The new  volume is calculated using the Charles law formula

that is V1/ T1 = V2/T2  where,

V1 = 4.24 l

T1= 23c  into kelvin = 23  +273 =296 K

T2 = 5.00 c into kelvin = 5.00 + 273 = 278 K

V2 = ?


by making  V2 subject the subject of the formula  by multiplying both side by T2

V2 = V1 xT2/ T1

V2 =  (4.24 L   x 278 K)  / 296 k  =3.98 L



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One of the most important chemical reactions is the Haber process, in which N2 and H2 are converted to ammonia which is used in
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Answer:

c) 22

Explanation:

Let's consider the following balanced equation.

N₂(g) + 3 H₂(g) ----> 2 NH₃(l)

According to the balanced equation, 34.0 g of NH₃ are produced by 1 mol of N₂. For 170 g of NH₃:

170gNH_{3}.\frac{1molN_{2}}{34.0gNH_{3}} =5.00molN_{2}

According to the balanced equation, 34.0 g of NH₃ are produced by 3 moles of H₂. For 170 g of NH₃:

170gNH_{3}.\frac{3molH_{2}}{34.0gNH_{3}} =15.0molH_{2}

The total gaseous moles before the reaction were 5.00 mol + 15.0 mol = 20.0 mol.

We can calculate the pressure (P) using the ideal gas equation.

P.V = n.R.T

where

V is the volume (50.0 L)

n is the number of moles (20.0 mol)

R is the ideal gas constant (0.08206atm.L/mol.K)

T is the absolute temperature (400.0 + 273.15 = 673.2K)

P=\frac{n.R.T}{V} =\frac{20.0mol\times (0.08206atm.L/mol.K)\times 673.2K ) }{50.0L} =22.0atm

7 0
2 years ago
Calculate the number of grams of sulfuric acid in 1 gallon of battery acid if the solution has a density of 1.31 g/ml and is 37.
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11. If there are 8.24 x 1022 molecules of NaCl in a salt shaker, what is the mass of the salt?
vlada-n [284]

Answer: 8.12 g NaCl

Explanation: Use Avogadro's number to find the number of m

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8.24x10²² molecules NaCl / 1 mole NaCl/ 6.022x10²³ molecules NaCl

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Next convert moles to grams NaCl using its molar mass;

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6 0
2 years ago
A gram of gasoline produces 45.0kJ of energy when burned. Gasoline has a density of 0.77/gmL. How would you calculate the amount
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Answer:

Math expression: =\frac{0.77\ g/ml*5200\ ml}{1\ g} *45.0\ kJ

Explanation:

<u>Given:</u>

Energy produced per gram of gasoline = 45.0 kJ

Density of gasoline = 0.77 g/ml

Volume of gasoline = 5.2  L=5200 ml

<u>To determine:</u>

The amount of energy produced by burning 5.2 L gasoline

<u>Calculation set-up:</u>

1. Calculate the mass (m) of gasoline given the density (d) and volume (v)

m = d*v\\\\m = 0.77 g/ml*5200 ml

2. Calculate the amount of energy produced

=\frac{0.77\ g/ml*5200\ ml}{1\ g} *45.0\ kJ=180180 kJ

7 0
2 years ago
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