Answer:
High melting points and boiling points
Aqueous solutions are good conductors of electricity
Explanation:
The oppositely-charged ions have strong attractions for each other, so it takes much energy to separate them.
When the ions are the molten state or in aqueous solution, they are free to move towards the oppositely-charged electrodes. The movement of charge constitutes an electric current.
Answer:
80cm3 of water, and 60cm3 carbon IV oxide is formed while 20cm3 of oxygen is left unreacted.
Explanation:
From Gay-Lussac's law, there are five volumes of oxygen, 1 volume if propane, 4 volumes of water and three volumes of CO2. Applying this shows the reacting volumes as we have in the image attached, hence the volumes left after reaction.
Answer:
The temperature is 30,92K
Explanation:
We use the formula PV=nRT. We convert the unit of pressure in kPa into atm.
101,325kPa----1atm
121kPa-------x=(121,3kPax 1 atm)/101,325kPa=1, 2 atm
PV=nRT---->T= (PV)/(RT)
T=(1,2 atm x 3L)/(1,42 mol x 0,082 l atm/K mol )= 30, 91721058 K
A physical change doesn't change what the substance is but for chemical change a new substance is formed and energy is either given off or absorbed.
Answer:
The answer is D.
Explanation:
Malleable is the property of <u>m</u><u>e</u><u>t</u><u>a</u><u>l</u> not non-metal.
