Tingting
States of matter
States of matter
What happens to the shape and volume of a liquid when it is poured into a different container?
: The shape changes to fit the container, but the volume stays the same.
Calculate the mass of 0.25 mol of carbon dioxide molecules
(CO2=44,mass=11g)
1. What is the arrangement of liquid
(no fixed shape)
Define oxidation
(Oxidation is the loss of electrons from a substance.)
What is the largest mammal in the world?
Blue Whale
Explain why solid iodine can sublimate at room temperature and pressure.
: Iodine, represented as I₂ in its solid state, spontaneously sublimes at room temperature due to the increase in entropy as it transitions from a solid to a vapor (gas)
Calculate the number of moles of iron,the mass is 5.6g. (Ar of Fe = 56).
(0.10mol)
Name the transformation of solid to gas
(sublimation)
What is the role of indicator in acid-base titration?
(The role of indicator is to mostly find out the point of equivalence when two particular solutions have reached the point of neutralization)
In which year did World War II end?
1945
Describe the conditions required to reach the critical point of a substance.
: The critical point of a substance is the temperature and pressure above which the substance cannot exist as a liquid or gas. At the critical point, the density of the liquid and gas phases become identical, and the distinction between the phases disappears.
Calculate the amount of carbon atoms in 6.0 g of carbon. (Ar of C = 12).
(0.5mol)
Differences between reduction and oxidation. List two
(Reduction, lose oxygen and gain electrons. Oxidation, gain oxygen, lose electrons.)
Explain what is meant by dynamic equilibrium in the context of a reversible reaction.
When the forward and reverse processes occur at the same rate, resulting in no observable change in the system.
In what year was the first iPhone released?
2007
Explain what happens to the particles in a substance as it undergoes a change from a solid to a liquid and then to a gas.
:As a substance changes from a solid to a liquid, the particles gain energy and begin to move more freely. When the substance changes from a liquid to a gas, the particles gain even more energy and move much further apart.
Calculate the amount of water molecules in 36 g of water. (Mr of water = 18).
(2mol)
During Habor Process, at what atm would the two gasses get compressed
(200 atm)
How does reversible reaction reach a state of dynamic equilibrium?
(when the forward and reverse processes occur at the same rate, resulting in no observable change in the system.)
What is the hottest planet in the solar system?
a) Mercury
Venus
Discuss why noble gasses are typically monatomic gaseous at room temperature and pressure, while diatomic gasses like nitrogen (N2) and oxygen (O2) are not.
Noble gases are monatomic and gaseous at room temperature due to their stable, complete electron shells. Diatomic gases like nitrogen and oxygen form strong covalent bonds to achieve stable electron configurations, keeping them gaseous under standard conditions.
n the reaction shown by the equation below, what mass of nitrogen, N2, is needed to make 120 g of nitrogen monoxide, NO? (Mr of NO = 30 and Mr of N2= 28). N2(g) + O2(g) → 2NO(g).
(120/30= 4.0 mol ,1 mol of N2 makes 2 mol of NO.This means that 2 mol of N2 makes 4.0 mol of NO. Mass of 2 mol of N2 = 2 × 28= 56 g)
What are the products when limestone (calcium carbonate) is heated strongly?
(calcium oxide and carbon dioxide)
What is the effect of increasing concentration of reactants on equilibrium?
(If the concentration of a reactant is increased the equilibrium will shift in the direction of the reaction that uses the reactants, so that the reactant concentration decreases.)
B
What is Ben's favourite animal? (Ben can't answer this)