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100
What state change occurs when a solid becomes a liquid?
What is melting
100
What is described as the force holding two atoms together?
What is chemical bond
100
What element has a molar mass of 30.974 g/mol?
What is phosphorus?
100
A sample of neon gas occupies a volume of 752 mL at 25°C. What volume will the gas occupy at 50°C if the pressure remains constant?
What is 815 mL
100
An acid that can donate only one hydrogen ion is called a _____ acid.
What is monoprotic
200
The ability to react to form a green layer is a _____________________ of copper.
What is chemical property
200
What is the correct named for the compound NH4SO4?
What is ammonium sulfate?
200
How many grams are in 1.946 moles of NaCl?
What is 113.8
200
A steel tank with a volume of 9.583 L contains N2 gas under a pressure of 4.972 atm at 31.8 °C. Calculate the number of moles of N2 in the tank.
What is 1.90 mol
200
The hydrogen ion concentration of a fruit juice is 2.5 x 10–5 M. What is the pH of the juice?
What is 4.6
300
Which particle has a charge of +1?
What is proton
300
How many single bonds can carbon form?
What is 4
300
How many grams of O2 are required to produce 358.5 grams of ZnO? 2Zn + O2 --> 2ZnO
What is 70.5 g
300
A heterogeneous mixture of intermediate sized particles is a:
What is colloid
400
What is the correct number of valence electrons in gallium?
What is 3
400
Which type of reaction fits the pattern A+BX--> AX + B
What is single replacement
400
What theory states that gas molecules are very small and undergo elastic collisions?
What is kinetic molecular theory
400
A _____ solution contains more dissolved solute than a saturated solution at the same temperature.
What is supersaturated
400
Alkanes have all ____________________ bonds
What is single
500
Which scientist classified elements into four categories: gases, metals, nonmetals and earths?
Who is Mendeleev
500
What type of reaction is Al + O2 --> Al2O3
What is synthesis
500
What term is used to describe the energy required to increase surface area of a liquid?
What is surface tension
500
The amount of energy required to raise the temperature of one gram of pure water by one degree Celsius is defined as:
What is one calorie
500
A molecule of octane contains ____ carbons
What is 8