All categories

3 years ago

What is potential energy

Chemistry

1 answer:

Elanso [62]3 years ago

7 0

Answer:

the energy possessed by a body by virtue of its position relative to others, stresses within itself, electric charge, and other factors.

Explanation:

You might be interested in

Consider the synthesis of water as shown in Model 3. A container is filled with 10.0 g of H2 and 5.0 g of O2.

vagabundo [1.1K]

2H2 + O2 → 2H2O

First, we will find the moles :

n H2 = m H2 / Mr H2

n H2 = 10 / 2

n H2 = 5 mole

n O2 = m O2 / Mr O2

n O2 = 5 / 16

n O2 = 0.3125 mole

n H2 / coef. H2 > n O2 / coef. O2

So, O2 is the limiting reactant

The mass of water produced :

n H2O = (coef. H2O / coef. O2) • n O2

n H2O = (2/1) • 0.3125

n H2O = 0.625 mole

m H2O = n H2O • Mr H2O

m H2O = 0.625 • 18

m H2O = 11.25 gr

Excesses reactant :

n H2 = 5 - 0.625 = 4.375 mole

m H2 = n H2 • Mr H2

m H2 = 4.375 • 2

m H2 = 8.75 gr

5 0

3 years ago

When the pressure that a gas exerts on a sealed container changes from 893 mm hg to 778 mm hg, the temperature changes from 49.3

solong [7]

Answer: The final temperature of the gas is 7.58 °C.

Explanation: We are given initial and final pressure of the system and we need to find the final temperature of the system.

To calculate it, we use the equation given by Gay-Lussac.

His law states that pressure is directly related to the temperature of the gas.

$P\propto T$

Or,

$\frac{P_1}{T_1}=\frac{P_2}{T_2}$

where,

$P_1$ = initial pressure = 893 mmHg = 1.175atm (Conversion factor: 1atm = 760mmHg)

$T_1$ = initial temperature = 49.3°C = [49.3 + 273.15]K = 322.45K

$P_2$ = Final pressure = 778mmHg = 1.023atm

$T_$ = Final temperature = ?°C

Putting values in above equation, we get:

$\frac{1.175atm}{322.45K}=\frac{1.023atm}{T_2}\\\\T_2=280.73K$

Converting Final temperature from kelvin to degree Celsius.

$T_2=280.73K=[280.73-273.15]^oC=7.58^oC$

Hence, the final temperature of the gas is 7.58 °C.

5 0

3 years ago

Read 2 more answers

A sample of copper is 5 moles. How many atoms of copper are present?

Eduardwww [97]

Answer:

Explanation:

8 0

3 years ago

Atoms of _______ gain electrons to fill their outer electron shells and become ________ ions.

Bezzdna [24]

Nonmetals and negative. Answer is c

6 0

3 years ago

Two methanol-water mixtures are contained in separate tanks. The first mixture contains 40.0 wt% methanol and the second contain

RoseWind [281]

Answer:

$M_{per}= 52.86$

$W_{per}=47.14$

Explanation:

<u>First mixture</u>:

40 wt% methanol - 60 wt% water 200 kg

$m_{met1}=200 kg * 0.4= 80 kg$

$m_{wat1}=200 kg * 0.6= 120 kg$

<u>Second mixture</u>:

70 wt% methanol - 30 wt% water 150 kg

$m_{met2}=150 kg * 0.7= 105 kg$

$m_{wat2}=150 kg * 0.3= 45 kg$

Final mixture:

$m_{metF=80 kg + 105 kg= 185 kg$

$m_{watF}=120 kg + 45 = 165 kg$

$M_{per}=\frac{185 kg}{185 kg + 165 kg}*100= 52.86$

$W_{per}=\frac{165 kg}{185 kg + 165 kg}*100=47.14$

If, the compositions are constant, the only variables are the mass of each mixture used in the final one, so there can be only one independent balance.

8 0

3 years ago