Chemical
How many moles are in 36.0 g of H2O?
2.00 mol
What pH value is neutral?
7
What particles have 2 protons and 2 neutrons?
Alpha particle
What type of reactions absorb heat?
Endothermic
If 10 g of H2 reacts with excess O2, how many grams of H2O form?
90 g
What is the molar mass of CO2?
44.o g/mol
What ions do bases produce?
OH- ions
What is radioactive decay?
Breakdown of unstable nuclei
What does T mean?
Change in temperature
How many grams of CO2 are produced from 2 moles of C in C+O2 ----> CO2?
88 g
What is the percent composition of oxygen in H2O?
88.9%
Is lemon juice an acid or base?
Acid
Which type of radiation penetrates the most?
Gamma radiation
If the temperature increases, is T positive or negative?
Positive
In 2Mg + O2 ---> 2MgO, if 4 moles Mg react with 1 mole O2, what is the limiting reactant?
O2
How much water is needed to dilute 2.0L of 3.0 M HCI to 1.0 M?
6.0 L final volume
What color foes limits paper turn?
Red
What happens during fission?
A nucleus splits apart
What formula for calculating heat?
q = mCpT
How many moles of O2 are needed to react with 2 moles of H2 in 2H2 + O2 ---> 2H2O?
1 mole O2
Determine the empirical formula for C2H4O2
CH2O
What happens in a neutralization reaction?
Acid and base form water and salt
When Polonium-216 undergoes alpha decay, it emits an alpha particle. What is the resulting isotope?
Lead-212
What unit is used for heat energy?
Joules
What volume of O2 is needed to produce 44.8 L of CO2 at STP in C+ O2 ---> CO2?
44.8 L O2