**Answer:**

The answer to your question is 1.46 g of Cl₂

**Explanation:**

**Data**

mass of Cl₂ = ?

mass of NaCl = 2.4 g

Chemical reaction

2Na + Cl₂ ⇒ 2NaCl

**Process**

**1.- Calculate the molar mass of chlorine and sodium chloride**

Molar mass Cl₂ = 2 x 35.5 = 71 g

Molar mass of NaCl = 23 + 35.5 = 58.5 g

**2.- Use proportions to solve this problem**

71g of Cl₂ --------------------- 2(58.5g) NaCl

x --------------------- 2.4 g

x = (2.4 x 71) / 2(58.5)

x = 170.4 / 117

** x = 1.46 g of Cl**

We can use combined gas law,

**PV/T = k (constant)**

Where, P is the pressure of the gas, V is volume of the gas and T is the temperature of the gas in Kelvin.

For two situations, we can use that as,

**P₁V₁/T₁= P₂V₂/T₂**

P₁ = 795 mm Hg

V₁ = 642 mL

T₁ = (273 + 23.5) K = 296.5 K

P₂ = ?

V₂ = 957 mL

T₂ = (273 + 31.7) K = 304.7 K

**From substitution,**

795 mm Hg x 642 mL / 296.5 K = P₂ x 957 mL / 304.7 K

P₂ = 548.072 mm Hg

760 mmHg = 1 atm

**548.072**** mm Hg = 1 atm x (548.072 mmHg / 760 mmHg) **

= 0.721 atm

Pressure of Oxygen gas is 0.721 atm.

**Answer is "A"**

Here, we made an assumption that** oxygen gas has an ideal gas behavior.**

P is the chemical symbol for phosphorus.

Cl is the chemical symbol for chloride, and there are three of them - the prefix for three is tri-.

205 units. If those are millimeters then it would be 205 millimeters. If its supposed to be in meters, it would be 0.205 meters.

**Answer:**

The Answer is B

**Explanation:**

The answer on this problem is b because I got it wrong then b on this question was the right answer.