Answer:
Water
Explanation:
Given the specific heat of oxygen is 918J/kg°C and the specific heat of water is 4181 J/kg°C.
Consider 1Kg mass of each substance.
Now 1 Kg of oxygen needs 918 J of energy to raise its temperature by 1°C
Also 1 Kg of water needs 4181 J of energy to raise its temperature by 1°C.
Clearly water recquires more energy when compared to oxygen.
Basically specific heat capacity is the amount of energy recquired to raise the temperature of a 1 kg body by 1°C.
Answer: 68.6 mL
Explanation:
We need to use the equation M1V1=M2V2. Molarity's units are in L so we need to convert the 50 ml into L (divide by 1000).
.05(.298)=(x)(.2173)
x = .068 L
to convert to mL we multiply by 1000
.068*1000=68.6 mL
A pure substance would be something containing only one type of molecule while a mixture consists of multiple pure substances.
I think answer should be B. Elements found within the Earth, dissolve in water, enter the water cycle, and return to the oceans. Hope it helped you, and have a great day.