1. Complete the WORD EQUATIONS for the following:
a) Magnesium + water
b) Calcium + oxygen
e) Zinc + sulphuric acid
d) Copper + oxygen
e) Sodium + water
1) Magnesium + hydrochloric acid
s) Lithium + water
h) Zinc + oxygen
i) Zinc + hydrochloric acid
j) Potassium + water
2. COPY and COMPLETE these symbol equations
and balance them:
a) Na + 02=
b) Mg + HCI=
c) Zn + H2SO4=
d) Pb + 02=
e) Ca + H2O =

the leaf is an organ of a typical plant, and the main functions are to complete photosynthesis and allow the plant to exchange gas, just like how we have the respiratory system. leaves have the stomata, which collects maintains co2 and o2 levels. this is necessary for cell metabolism. the leaf also collects sunlight using chloroplasts. succinctly, leaves own a pivotal role in sustaining plant life.

in scientific notation, the value of the  speed of light in a vacuum

  will be written as 2.995 * 10^8. when this value is represented in the form of

  a * 10^b, then, a = 2.995 and b = 8.

the value of the speed of light in a vacuum given above can also be rounded up to approximately 300000000. in this case, the scientific notation will be written as 3 *10^8.

gasoline is a mixture. it contains several different kinds of compounds that can be present in a variety of ratios.