Chemistry Question Preview (ID: 54395)
Practice Solving For Density
Physical And Chemical Reactions.
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A stone with a mass of 5g is placed into a graduated cylinder containing 50mL of water. With the stone in the graduated cylinder, the water rises to 75mL. What is the density of the stone if density is mass divided by volume.
a) 0.07g/mL
b) 0.20g/mL
c) 5.00g/mL
d) 125.00g/mL
Density = Mass / Volume. An object has a mass of 20g and volume of 10cm3. What is its density?
a) 2 g/cm3
b) 30 g/cm3
c) 200 g/cm3
d) 10 g/cm3
Block 1 has a mass of 80g and volume of 100cm3. Block 2 has a mass of 105g and volume of 100cm3. Block 3 has a mass of 78g and volume of 50cm3. Block 4 has a mass of 48g and volume of 50cm3. Based on the data, what can be said about the density?
a) Block 4 is denser than Block 2
b) Block 1 is denser than Block 3
c) Block 1 is denser than Block 4
d) Block 3 is denser than Block 2
Cube 1 mass is 9.9g and volume 8.5cm3. Cube 2 mass is 14.9g and volume 5.5cm3. Cube 3 mass is 5.0g and volume 6.5cm3 Cube 4 mass is 18.0g and volume 20.0cm3. Which cube has the LOWEST density?
a) Cube 1
b) Cube 2
c) Cube 3
d) Cube 4
A rock has a mass of 5.00g and occupies a volume of 25.00cm3. What is the density of the rock if density is mass/volume.
a) 0.20g/cm3
b) o.50g/cm3
c) 2.00g/cm3
d) 5.00g/cm3
A reaction occurs in a beaker of fluid, and a white substance settles to the bottom. This precipitate is evidence that what process has occurred?
a) Chemical Reaction
b) Gas Exchange
c) Heat Exchange
d) Physical Change
Which process BEST illustrates elements combining to make a new compound?
a) melting a solid to make a liquid
b) boiling a liquid to make steam
c) cutting a solid to make more parts
d) mixing two liquids to make a solid (unexpected change)
What indicator is typically a sign that a chemical change has taken place?
a) a change in the shape of the substance
b) A change in the size of the substance
c) the formation of a precipitate (solid)
d) the formation of a liquid
What would the breaking up of a large rock into small rocks be considered?
a) chemical property
b) chemical reaction
c) physical change
d) physical property
Which statement about the Law of Conservation of Mass is true?
a) The mass of the products can be less than the mass of the reactants
b) The mass of the products must be equal to the mass of the reactants
c) The mass of the final products can be more than the mass of the reactants
d) The mass of the reactants must be more than the mass of the products
An object is placed in a graduated cylinder containing 15mL of water, and the water rises to 30mL. IF the mass of the object is 54g, what is the density of the object if density = mass/volume?
a) 0.3g/mL
b) 1.2g/mL
c) 1.8g/mL
d) 3.6g/mL
Which example represents a physical change?
a) lightning striking a tree and causing it to burn
b) wind and ice breaking up rocks
c) an iron boat in water rusting over a period of time
d) vinegar added to baking soda and forming bubbles
What is the MOST accurate method for measuring the volume of liquid?
a) Put a ruler into a graduated cylinder and measure the water level
b) Pour water into a beaker and read the water level
c) Read the water level at the highest point of the meniscus (the curve of the water)
d) Read the water level at the lowest point of the meniscus (the curve of the water)
Two liquids are mixed together in a beaker, and a solid settles to the bottom of the beaker. What change has taken place?
a) An acid was neutralized
b) A phase change has occurred
c) AN insoluble reactant was formed
d) A precipitate formed
Which chemical equation supports the law of conservation of matter?
a) 2H + O2 --- 2H2O
b) H2 + O2 --- H2O
c) H2 + O2 --- 2H2O
d) 2H2 + O2 --- 2H2O
Which equation is balanced?
a) CaCO3 --- CaCO2 + CO2
b) C + H2O --- CO + H2
c) N2 + 3H2 ---3NH3
d) SO2 + O2 ---2SO4
What does the arrow represent in the chemical equation ?
a) breaks apart
b) combines
c) chemically reacts
d) yields
What is the 2 called in the reactants of the balanced equation H2 + Cl2 --- HCl
a) Subscript
b) Coefficient
c) Atomic Number
d) Atomic Mass
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