Answer:
Molar mass = 12.51 g/mol
Explanation:
V = 3L
P = 1.25 atm
T = 20 C = 20 + 273 = 293 K (Upon conversion to kelvin temperature)
n =?
m = 1.95g
Molar mass = ?
The variables are related by the follwing equation;
pV = nRT
where r = gas constant = 0.0821 L atm K−1
Solving for n, we have;
n = pV / RT
n = (1.25 * 3 ) / (0.0821 * 293)
n = 3.75 / 24.0553 = 0.1559 mol
The relationship between number of moles, n and molar mass is given as;
n = mass / molar mass
Molar mass = Mass / n = 1.95 / 0.1559
Molar mass = 12.51 g/mol
Answer:
1, 2, 3 and 4.
Explanation:
Hello,
Standard enthalpy of reaction is defined by the difference between the products whole enthalpy and the reagents whole enthalpy. It is known that an element's (by itself or as a diatomic gas) enthalpy of formation is 0, turning out into an equality between the enthalpy of formation and the products whole enthapy. Thus, the reactions that accomplish the given questions are 1, 2, 3 and 4, since the reagents are just the elements sodium, chlorine, carbon and oxygen.
Best regards.
Answer:
True
Explanation:
The main function of the spongy layer is to temporarily store sugars, and amino acids synthesized in the palisade layer of the leaf (the palisade carries out most of photosynthesis)
The answer is A.
We know the formula for molarity :
<u>Molarity = Number of moles ÷ Volume</u>
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Let's assume there are 0.6 moles of NaCl in 1 liter of ocean water.
Then, mass of salt is :
- Mass of one mole salt × 0.6
- 58.5 × 0.6
- 35 grams
