Sample cost = $15.796
<h3>Further explanation</h3>
Given
Mass = 2 g
Density = 0.718 g/ml
Cost = $5.67 per mL
Required
Cost
Solution
The density : the ratio of mass and volume
Can be formulated :
Density (ρ) = m : V
The volume of the liquid :
V = m : ρ
V = 2 g : 0.718 g/ml
V = 2.786 ml
Sample cost :
= 2.786 ml x $5.67/ml
= $15.796
Compounds=Chemically combined, fixed proportions,and components change properties.
Both= Made of elements, and 2 or more components.
Mixtures=Physically combined, variable proportions, and components retain properties.
Answer: Isotopes
Explanation:
The atoms of a chemical element can exist in different types. These are called isotopes. They have the same number of protons (and electrons), but different numbers of neutrons. Different isotopes of the same element have different masses.
Hope this helps!
The answer is 0°C
step by step explanation:
<u>Answer:</u> The mole fraction of oxygen gas is 0.479
<u>Explanation:</u>
We are given:
Partial pressure of methane = 143 mmHg
Partial pressure of nitrogen gas = 469 mmHg
Partial pressure of oxygen gas = 563 mmHg
Total pressure = (143 + 469 + 563) = 1175 mmHg
To calculate the mole fraction of oxygen gas, we use the equation given by Raoult's law, which is:

where,
= partial pressure of oxygen gas = 563 mmHg
= total pressure = 1175 mmHg
= mole fraction of oxygen gas = ?
Putting values in above equation, we get:

Hence, the mole fraction of oxygen gas is 0.479