Exothermic means the process of releasing heat and that means u can cross off 3 and 4 so you're left with one and two boiling is definitly a process of releasing heat i would pick choice one because melting it aplying heat so final answer 1
The rounded three digits for the given number is 2.46
<u>Explanation:</u>
Significant figures are the number of digits in a value which contributes to the degree of accuracy of the value while measuring
<u>Rules:</u>
- Digits which are not zero are always essential.
- Any zeros between two major digits are important.
- Only a final zero or trailing zeros are important in the decimal section
<u>Solution:</u>
- Given number- 2.45986
- Decimals- 5 digits
- Scientific Notation
-2.45986 × 10^0
- Applying the rules until rounding the 3 digits we get,
- The rounded three digits for the given number is 2.46
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Answer: Lithium (Li) 16.373%
Chlorine (Cl) 83.627%
Explanation:
Answer:
Mass fraction: 73,6% n-hexane; 26,4% dichloromethane
Mole fraction: 73,0% n-hexane; 27,0% dichloromethane
Explanation:
With a basis of 100 mL:
Mass of n-hexane:
85 mL × = 55,7 g
Mass of dichloromethane
15 mL × = 20,0 g
Total mass = 20,0 g + 55,7 g = 75,7 g
Mass fraction of n-hexane:
=73,6%
Mass fraction of dichloromethane:
= 26,4%
Moles of n-hexane:
55,7 g × = 0,65 moles
Mass of dichloromethane
20,0g × = 0,24 moles
Total moles: 0,65 moles + 0,24 moles = <em>0,89 moles</em>
Molar fraction of n-hexane:
=73,0%
Molar fraction of dichloromethane:
= 27,0%
I hope it helps!
Crushing a can
breaking glass
boiling water