Che 140 Ch 6 Learn Smart

Consider the balanced chemical equation Ca(OH)2(aq)

1.08 moles

How many joules are there in 15.74 calories?

65.86 joules

Consider the balanced chemical equation 3Cu(s)

HNO3

Consider the balanced chemical equation SiH4(g)

O2

1 mole of Co2 is formed from its elements and the value of q for this system is -394kJ. What change if any is occuring?

The system loses heat.

The ____________ ratio and the mole ratio are related to the coefficients in the balanced chemical equation.

molecule

The process of determining the amounts of substances in a chemical reaction is

stoichiometry

The ____________ yield is defined as the ______________ amount of product that can be from a chemical reaction.

theoretical maximum

How many moles of calcium carbonate (CaCO3, 100.09 g-mol) are there in 6.15g of calcium carbonate?

0.0614 moles

Consider the following balanced chemical equation: 2C2H6(g)+70(2)(g) --> 4CO2(g)+5H2O(l) How many moles of O2 will be required to react with 14 moles of C2H4

49 moles

The law of conversion of energy states that energy may be converted from one form into another but it cannot be __________ nor ____________

created destroyed

The __________ reactant in a reaction is one that limits the amount of product formed. This reactant will be completely used up in the reaction. Any reactants that are not used up are said to be __________.

limiting present in excess

The law of conservation of mass states that the mass of the reactants must equal the

mass of the products

Which one of the following options gives the correct procedure to calculate the the mass of a substance given the number of moles?

moles x molar mass