Why cant science answer questions with certainty?

An unknown metal displaces aluminum (Al) from solution but does not displace sodium (Na). Using the activity series, determine the unknown metal.

Determine the approximate amount of potassium hydrogen phthalate, KHP, that you will need to neutralize 6.00 ml of 0.100 M NaOH. The formula weight of KHP is 204.233 g/mol.

The number of moles of solute dissolved per liter of solution; also known as molar concentration.

At a dosage of 2.8 mg per kg of body weight, how many mg of adrenaline should an 84 kg adult receive.

What is the atomic number of hydrogen?

You just found a metallic object in a creek bed. From the following tests and Figure 2, determine what it is. 96.5g will balance the object. Its mass is g. The object displaces 5 mL of water. Its volume is cm 3. The density of the object is g/cm 3.

Extend your thinking: Why do you think the temperature does not change much during a phase change? If possible, discuss your answer with your classmates and teacher.

Which bond has the least degree of polarity? K-o Li-o No-o Rb - 0

What happens when a glass is filled to the brim with water and an ice cube is in the glass already what would happen to the level of water when the ice cube had melted?

Explain how a nuclear power plant uses the process of nuclear fission to produce electricity.