Question

Which of the following is most massive?

A. .25 kg of iron
B. 2.5 g of sodium chloride
C. 2.5 kg of oxygen gas
D. 250 g of helium gas
E. 250 mg of aluminum

Answer 1

To determine the most massive substance, we need to convert all quantities to the same unit of mass. Among the given options, 2.5 kg of oxygen gas has the greatest mass.

Step-by-step explanation:

The most massive substance can be determined by comparing the masses of the given options. To do this, we need to convert all quantities to the same unit of mass. Let's convert all the given quantities to grams:

• .25 kg of iron = 250 g
• 2.5 g of sodium chloride = 2.5 g
• 2.5 kg of oxygen gas = 2500 g
• 250 g of helium gas = 250 g
• 250 mg of aluminum = 0.25 g

Comparing the masses, we can see that 2.5 kg of oxygen gas has the greatest mass among the given options.