A block of material has a volume of 2 mº. It has a mass of 1 x 104 kg. Calculate the density of the materia sample and express your results in g/cm with appropriate scientific notation.

d = 0.5×10¹g/cm³

Explanation:

Given data:

Volume of material = 2 m³

Mass of material = 1×10⁴ Kg

Density of material = ?

Density:

Density is equal to the mass of substance divided by its volume.

Formula

d = m/v

Solution:

Volume of material = 2 m³

1 m³ = 1000000 cm³

2 ×10⁶cm³

Mass of material = 1×10⁴ Kg

1 Kg = 1000 g

1×10⁷ g

by putting values into density formula

d = 1×10⁷ g/2 ×10⁶cm³

d = 0.5×10⁷⁻⁶ g/cm³

d = 0.5×10¹g/cm³

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e