Which property determines an atom's ability to attract electrons shared in a chemical bond?

A sample of hydrogen gas has a volume of 8560. mL at standard temperature and a pressure

attashe74 [19]

Answer: 5.26 moles

Explanation:

Given that:

Volume of hydrogen gas V = 8560mL

(since 1000 mL = 1dm3

8560mL = 8560/1000= 8.56dm3)

Standard temperature T = 25°C

Convert temperature in Celsius to Kelvin

(25°C + 273 = 298K)

Pressure P = 1.5atm

Number of moles of hydrogen = ?

Note that Molar gas constant R is a constant with a value of 0.0082 ATM dm3 K-1 mol-1

Then, apply ideal gas equation

pV = nRT

1.5 atm x 8.56dm3 = n x (0.0082 atm dm3 K-1 mol-1 x 298K)

12.84atm dm3 = n x 2.44atm dm3 mol-1

n = (12.84atm dm3 / 2.44atm dm3 mol-1)

n = 5.26 moles

Thus, there are 5.26 moles of Hydrogen, H present in this gas sample.

3 0

3 years ago

When tested a solution turns red litmus to blue this indicates that the solution contains more?

lbvjy [14]

When red litmus turns blue, means the solution is basic, so it has more OH⁻ (hydroxide) ions.

5 0

4 years ago

This stadium can hold 100,000, or 1 x 105, people. The number of atoms in a grain of iron is about 1 x 1018. Would you need 1 x

nata0808 [166]

<h3>Answer:</h3>

1 x 10^13 stadiums

<h3>Explanation:</h3>

We are given that;

1 stadium holds = 1 × 10^5 people

Number of iron atoms is 1 × 10^18 atoms

Assuming the stadium would carry an equivalent number of atoms as people.

Then, 1 stadium will carry 1 × 10^5 atoms

Therefore,

To calculate the number of stadiums that can hold 1 × 10^18 atoms we divide the total number of atoms by the number of atoms per stadium.

Number of stadiums = Total number of atoms ÷ Number of atoms per stadium

= 1 × 10^18 atoms ÷ 1 × 10^5 atoms/stadium

= 1 × 10^13 Stadiums

Thus, 1 × 10^18 atoms would occupy 1 × 10^13 stadiums

7 0

3 years ago

A gas with a volume of 15L at 640K is cooled at a constant pressure until the volume reaches 5L. What is the new temperature?

Brut [27]

Answer:

The new temperature is 213.33 K

Explanation:

Charles's law indicates that the volume of gas at constant pressure is directly proportional to its temperature. This law indicates that if the temperature increases the volume increases and if the temperature decreases the volume decreases.

So, Charles's law is a law that says that when the amount of gas and pressure are kept constant, the ratio between volume and temperature will always have the same value:

$\frac{V}{T}=k$

When you want to study two different states, an initial and a final one of a gas, the expression can be applied:

$\frac{V1}{T1} =\frac{V2}{T2}$

In this case, you know:

V1= 15 L
T1= 640 K
V2= 5 L
T2=?

Replacing:

$\frac{15 L}{640 K} =\frac{5 L}{T2}$

Solving:

$T2=\frac{5 L}{\frac{15 L}{640 K} }=\frac{5 L*640 K}{15 L}$

T2= 213.33 K

<u><em>The new temperature is 213.33 K</em></u>

8 0

3 years ago

If an 85.0 mL container of helium gas at standard pressure is heated from 20.oC to 91oC and the pressure is increased to 2.8 atm

erastovalidia [21]

Answer: V₂ = 37.71mL

Explanation: To determine the new volume of Helium gas, use the Combined Gas Law, which states the following relationship among pressure, volume and temperature:

$\frac{P_{1}V_{1}}{T_{1}} =\frac{P_{2}V_{2}}{T_{2}}$