Series circuit is the answer
hope that helps!
Answer: B. Rusting of the metal is a chemical change.
Explanation: Rusting is considered a chemical change since it involves a change in the composition of iron through oxidation. Since there is a presence of oxygen and moisture it weakens the bonds of iron molecules to react and form iron oxide another substance in the chemical process.
The modern periodic law states that the physical and chemical properties of the elements are periodic functions of their atomic numbers.
Modern periodic table is based on atomic number. Thus, the properties of elements are related to their atomic number or electronic configuration. Elements are arranged according to increasing order of atomic number. Elements with similar properties occur at regular intervals in the periodic table. The cause of periodicity in properties is due to recurrence of similar outer electronic configuration at certain regular intervals.
15 - 30 - 15 indicates the percentages of Nitrogen - Phosphorus - Potassium respectively. Thus, the fertilizer has 30% Phosphorus (by mass)
Mass of phosphorous = 5 * 0.3
= 1.5 grams
Atomic mass of Phosphorous:
31
moles = mass / Ar
moles = 1.5 / 31
moles = 0.048 mol