Answer:
134.397 Joules
Explanation:
Using the formula:
E = C × m × Δθ (where E is Energy, C is specific heat capacity and Δθ is change in temperature)
So E = 0.45×5.45×(79.8-25)
So E = 134.397 Joules
Answer : C) separate the parts by their properties.
Explanation:
Mixture is a substance which has two or more components which do not combine chemically and do not have any fixed ratio in which they are present. Trail is a mixture of various substances which do not react chemically and thus the constituents retain their chemical properties. The substances can be separated by using physical properties.
Compound is a pure substance which is made from atoms of different elements combined together in a fixed ratio by mass.It can be decomposed into simpler constituents using chemical reactions. The elements lose their individual chemical properties. The elements can not be separated using physical means.
2.54 moles of CaCl occupies 56.89 liters volume
Explanation:
- Each mole of any gas occupies 22.4 liters volume at STP.
- STP is defined as the standard temperature and pressure and those standard values are zero degree and one atmospherics pressure
- 22.4 liters is a constant number as Avogadro's number which is nothing but 6.022*
. - Hence, to convert 2.54 moles just multiply it with 22.4 L
- That is, 22.4*2.54= 56.89 L
- So, 2.54 moles of CaCl occupies 56.89 L volume space
