The Mole
How many moles of copper are in 6,000,000 atoms of copper?
What is 9.96 x 10-19 moles of copper
A sample contains 27.1 g of calcium oxide. How many moles of calcium oxide are in the sample?
What is 0.483 mol CaO
When a solid changes into a liquid, it is called ......
melting
What is a solution?
What is A homogenous mixture of two or more substances that exist in a single phase
Which of the following statements is true concerning acids and bases?
a- acids and bases don't react with each other
b- acids mixed with bases neutralize each other
c- acids mixed with bases make stronger bases
d- acids mixed with bases make stronger acids
b- acids mixed with bases neutralize each other
How many grams is a sample containing 2.71 x 1024 atoms of iron?
251.33 grams of iron.
How many moles of Al are in 2.16 mol of Al2O3?
What is 4.32mol Al
When a solid changes directly into a gas, it is called ......
evaporation
What compounds (components) make up a solution?
What is a Solvent and solute
True or false: bases are sometimes called alkalis.
True
Calculate the molar mass of CuSO4.
What is 159.5 g/mol
How many grams of O are combined with 7.14x1021 atoms of N in the compound N2O5?
What is 0.474g O
Which sentence best describes a liquid?
A What is Particles slide past each other
B they move around without touching
What is Particles slide past each other
What is the equation to find molarity?
What is Moles/Liters
Which is the correct set of acid properties?
a- sour taste, corrosive, change litmus from red to blue
b- sour taste, corrosive, change litmus from blue to red
c- sweet taste, slippery, change litmus from blue to red
d- sour taste, slippery, change litmus from blue to red
b- sour taste, corrosive, change litmus from blue to red
How many atoms of cobalt are in a 0.39 mole sample of Co(C2H3O2)3?
What is 2.35 x 1023 atoms
Calculate the number of moles of this compound: 21.5 g CaCO3
What is 0.215 mol
A balloon contains 4 moles of an ideal gas with a volume of 5.0 L. If an additional 8 moles of the gas is added at constant pressure and temperature, what will be the final volume of the balloon?
15L
Is water a solvent?
What is Yes
What ph are bases?
7-14
What is the mass in milligrams of chlorine in 3.9 x 1019 molecules of Cl2?What is 31.3 grams of aluminum
What is 31.3 grams of aluminum
How many moles of H2 and N2 can be formed by the decomposition of 0.145 mol of ammonia, NH3?
What is 4 moles
If you have 4 moles of gas at pressure of 5.6 atm and a volume of 12 liters what is the temperature?
What is 205K
If 40.0 ml of .20 M HCl is diluted to a final volume of 1000 ml, whats is the new molar concentration?
What is .005M
What is a substance with a pH count above 7 and turn litmus paper blue
What is a base