STAAR Review - Chemistry and Physics

Front

How many atoms are there in H₂SO₄?

Back

There are 7 atoms in total: 2 Hydrogen (H), 1 Sulfur (S), and 4 Oxygen (O).

Front

What is the formula to calculate acceleration?

Back

Acceleration (a) = Net Force (F) / Mass (m).

Front

If a 5 kg block is pulled with a net force of 32 N, what is its acceleration?

Back

The acceleration is 6.4 m/s².

Front

What is the force acting on a 20 kg bike accelerating at 10 m/s²?

Back

The force is 200 Newtons (F = m * a).

Front

Which subatomic particle determines the identity of an element?

Back

The proton determines the identity of an element.

Front

How many elements are in the compound Mg₂As₃COHNi₂?

Back

There are 6 elements: Magnesium (Mg), Arsenic (As), Carbon (C), Oxygen (O), Hydrogen (H), and Nickel (Ni).

Front

What is the definition of a compound?

Back

A compound is a substance formed when two or more elements chemically bond together.

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object, while weight is the force exerted by gravity on that mass.

Front

What is the unit of force in the International System of Units (SI)?

Back

The unit of force is the Newton (N).

Front

What is the law of conservation of mass?

Back

The law states that mass is neither created nor destroyed in a chemical reaction.