Answer:
C
Explanation:
In thermodynamics, a exothermic system looses heat to the surroundings while an endothermic system absorbs heat from the surroundings.
A system is a part the universe marked off by a specified boundary. The contents of the cup constitutes the system in this case.
The region of space outside the system is called the surroundings. Hence everything outside the cup constitutes the surroundings.
The ans is C. Hydrogen, deuterium amd tritium are all isotopes of hydrogen. Isotopes only differ in their number of neutrons. Hence, the ans is c
Answer:
697 g
Explanation:
Ethanol (C₂H₅OH) and butanoic acid (C₃H₇COOH) react to form ethyl butanoate (C₃H₇COOC₂H₅) and water (H₂O).
C₂H₅OH + C₃H₇COOH → C₃H₇COOC₂H₅ + H₂O
The molar ratio of C₂H₅OH to C₃H₇COOC₂H₅ is 1:1. The moles of C₃H₇COOC₂H₅ produced from 6.00 moles of C₂H₅OH are:
6.00 mol C₂H₅OH × (1 mol C₃H₇COOC₂H₅/1 mol C₂H₅OH) = 6.00 mol C₃H₇COOC₂H₅
The molar mass of C₃H₇COOC₂H₅ is 116.16 g/mol. The mass corresponding to 6.00 mol is:
6.00 mol × (116.16 g/mol) = 697 g
Answer:
The empirical formula of a compound is the simplest whole number ratio of each type of atom in a compound. It can be the same as the compound's molecular formula, but not always. An empirical formula can be calculated from information about the mass of each element in a compound or from the percentage composition
Explanatio internet bud
Answer:
[MCHM] = 7.52 M
Explanation:
This all about unit conversion
1 feet = 0.3048 meters
1 yard = 0.9144 meters
7.60 feet . 0.3048 = 2.31 meters deep
100 yd . 0.9144 meters = 91.44 meters long and 91.44 meters wide
In the river we have a volume of:
2.31 m . 91.44m . 91.44m = 19314.5 m³
1 dm³ = 1 L
1 dm³ = 0.001 m³
19314.5 m³ / 0.001 m³ = 19314542 L (The final volume of the river)
3.785 L = 1 gallon
In 19314542 L, we have (19314542 / 3.785) = 5102917 gallons
1 gallon = 128 oz
5102917 gallons . 128 = 653173376 oz
1 oz = 28.3495 g
653173376 oz . 28.495 = 1.86x10¹⁰ grams
Molar mass MCHM = 128 g/m
Moles of MCHM = 1.86x10¹⁰ grams / 128 g/m = 145312500 moles
Molarity = mol /L → 145312500 moles / 19314542 L = 7.52 M
