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WorksheetsFormulas and equations
Total questions: 15
Worksheet time: 15mins
Which formula represents calcium hydride?
CaOH
CaH₂
CaH
Ca(OH)₂
Which equation represents a physical change?
3O₂(g) → 2O₃(g)
N₂(g) + 2O₂(g) → 2NO₂(g)
H₂(g) + I₂(g) → 2HI(g)
I₂(s) → I₂(g)
Given the equation representing a reaction: F₂(g) + 2KCl(aq) → 2KF(aq) + Cl₂(g) Which type of chemical reaction is represented by the equation?
single replacement
synthesis
decomposition
double replacement
Given the incomplete equation for a fermentation reaction: X → 2CH₃CH₂OH + 2CO₂ Which formula represents the missing reactant, X, in this equation?
C₅H₁₂O₅
C₆H₆O₅
C₆H₆O₆
C₆H₁₂O₆
Which sample of matter is classified as a mixture?
SO₂(g)
CH₃OH(ℓ)
NaCl(s)
KNO₃(aq)
What is a chemical name of the compound CuS?
copper(I) sulfate
copper(I) sulfide
copper(II) sulfate
copper(II) sulfide
Given the equation representing a reaction: 2NaCl → 2Na + Cl₂ Which type of reaction does this equation represent?
decomposition
single replacement
synthesis
double replacement
Which phrase describes a specific compound?
can be physically separated into elements
can contain only one element
is composed of elements mixed in proportions that can vary
is composed of elements chemically combined in a definite ratio
Given the equation representing a reaction: 2H₂(g) + 2NO(g) → N₂(g) + 2H₂O(g) What is the mass of N₂(g) produced when 1.0 gram of H₂(g) completely reacts with 15.0 grams of NO(g) to produce 9.0 grams of H₂O(g)?
7.0 g
14.0 g
28.0 g
25.0 g
Which formula is the empirical formula for ethane, C₂H₆?
C₄H₁₂
C₂H₆
CH₃
CH
A chemical reaction occurs when
H₂O(g) forms H₂O(ℓ)
O₂(g) forms O₃(g)
H₂O(ℓ) forms H₂O(s)
O₂(ℓ) forms O₂(s)
Which two terms represent types of chemical formulas?
synthesis and decomposition
polar and nonpolar
saturated and concentrated
empirical and molecular
Which statement describes a chemical property of copper?
Copper reacts with oxygen
Copper conducts an electric current.
Copper has a red-orange color.
Copper can be flattened into sheets
What is a chemical name for the compound PbO₂?
lead(II) oxide
lead(III) oxide
lead(I) oxide
lead(IV) oxide
Which formula contains a polyatomic ion?
Al₂O₃
AlBr₃
K₂S
KCN
