Chemistry 1A T1 2021 Quiz Buster 1

Which of the following is an example of a homogenous mixture?

• Soil

• Sand

• Metal alloy

• None of the above

What is the symbol for Potassium?

• P

• Po

• K

• Ks

Which is the correct balanced equation?

• C₂H₆O + O₂ -> CO₂ + H₂O

• 2C₂H₆O + 7O₂ -> 4CO₂ + 6H₂O

• C₂H₆O + 3O₂ -> 2CO₂ + 3H₂O

• None of the above

I have 3.0 moles of nitrogen gas, what is its mass?

• 84 g

• 84.0 g

• 42 g

• 42.0 g

Which of the following elements tend to form a cation?

• O

• F

• Cl

• Na

What is the concentration of a solution formed by dissolving 6.28g of NaCl in water to make a 100ml solution?

• 1 M

• 1.07 x 10^-3 M

• 1.07 mol

• 0.107 mol

If an atom has 17 electrons and a mass of 35, how many neutrons does it have?

• 17

• 18

• 35

• 52

How many electrons does O^2- have?

• 4

• 6

• 8

• 10

How many molecules are in 35g of CH₄?

• 13.16875 x 10²³

• 1.32 x 10²³

• 1.3 x 10²⁴

• 1.32 x 10²⁴

Which is an example of a physical change?

• Burning paper

• Digesting sugar

• Boiling water

• Rusting metal