Balancing Chemical Equations
Amount of Substance
Mole
Random
Chemical Reactions
100
CH4 + H2O → CO + H2
CH4 + H2O → CO+
H2
100
How many moles of hydrogen atoms are there in one mole of water?
2 moles of hydrogen atoms
100
What is Avogadro's number?
6.022 x 1023
100
What are the names of the leading Actor and Actress of "Spiderman: No-Way Home"?
Tom Holland and Zendaya
100
What's needed for a collision between molecules to be effective?
Correct orientation
Enough energy
200
Si + F2 → SiF4
Si + 
F2 → SiF4
200
Which of the following has more oxygen atoms?
a) 1 mol of ozone (O3)
b) 2 mol of carbon dioxide (CO2)
2 mol of carbon dioxide
200
Which unit of measurement is molar mass MOST COMMONLY measured in?
grams per mole (g/mol)
200
How did the famous American basketball player, Kobe Bryant, die in Janunary 2019?
Helicopter crash
200
What are the 4 pieces of evidence of a chemical reaction
1) Presence or formation of a precipitate
2) Presence or a formation of substances in different states of aggregation
3) A change in color
4) A great energy exchange
300
C2H3F3 + O2 → CO + 3HF
C2H3F3 + O2 → CO+ 3HF
300
How many moles are there in 5,6 grams of iron (Fe)?
0,1 moles of iron
300
How many moles are there in 180 g of water?
10 moles of water
300
What city will Eurovision 2022 be held?
Turin, Italy
300
Which two factors influence the chemical reaction rate?
Temperature and concentration of reagents
400
NaCl + H2SO4 → NaHSO4 + HCl
NaCl + H2SO4 → NaHSO4 + HCl
400
Order the following from lowest to highest according to mass:
a) 0,25 mol of dioxygen (O2)
b) 5 mol of dihydrogen (H2)
c) 1 mol of dinitrogen (N2)
O2 < H2 < N2
400
What is Avogadro's number used for?
To calculate one mole of a substance
400
Name 3/5 COVID vaccines that are available in Spain?
Moderna
Pfizer/BioNTech
Astrazeneca/Oxford
Jannsen/ Johnson & Johnson
Novavax
400
Give an example of a non desirable chemical reaction
decomposition of food, rusting of iron
500
CH2F2 + O2 → CO2 + H2O + F2
CH2F2 +
O2 →CO2 +H2O +F2
500
Which of the following has more atoms?
a) 2 mol of sulphuric acid (H2SO4)
b) 3 mol of lead tetrachloride (PbCl4)
3 mol of lead tetrachloride
500
define molar mass
the mass of one mole of a substance
500
Which music artist was the #1 most played artist in the world for the year 2021?
Bad Bunny
500
Define the rate of a chemical reaction
the variation of the amounts of the product obtained or the reagents which disappear per unit time