Calculate the Number of Oxygen Atoms in 45

question 65

Multiple Choice

Calculate the number of oxygen atoms in 45.0 g of Co₂(SO₄) ₃ (molar mass of Co ₂ (SO ₄ ) ₃  = 405.8 g/mole) .

• A) 8.01 × 10²³ atoms
• B) 2.67 × 10²³ atoms
• C) 12.0 atoms
• D) 6.68 × 10²² atoms
• E) 1.07 × 10²⁴ atoms

---

Definitions:

Independent Variable

An independent variable is a variable that is manipulated or varied by the researcher to investigate its effect on the dependent variable in an experiment.

Dependent Variable

A variable in experimental research that is expected to change as a result of manipulations of the independent variable.

Spurious Relationship

A relationship where two variables seem to be related to each other, but in reality, their association is caused by a third variable or by chance.

Research Hypothesis

A specific, testable prediction about what you expect to happen in your study, often based on theoretical expectations or previous research.