Define enzyme. 2. Complete the table for enzymes. 3. State Newton's Second Law of Motion in equation form and calculate the mass of a spacecraft given its weight and the acceleration due to gravity on

Weight on distant planet ($W_p$) = $39000 \text{ N}$
Acceleration due to gravity on distant planet ($g_p$) = $3.75 \text{ m/s}^2$

The mass of the spacecraft is $\boxed{\text{10400 kg}}$.

II) Weight of the spacecraft on earth

Mass ($m$) = $10400 \text{ kg}$
Acceleration due to gravity on Earth ($g_e$) = $10 \text{ m/s}^2$

The weight of the spacecraft on Earth is $\boxed{\text{104000 N}}$.

1.c)

i) A mixture is a substance containing two or more different substances (elements or compounds) that are physically combined but not chemically bonded. Each substance retains its individual chemical properties.

ii) Two properties of a mixture:

• The components of a mixture retain their individual properties.
• The components of a mixture can be separated by physical means.

iii) A suitable method for obtaining sodium chloride from sodium chloride solution is evaporation (or crystallization).