2 Na(s) + Cl₂(g) = 2 NaCl(s) 22,4 L in STP
Number of moles :
n = m / molar mass
Na = 103.0 / 22.98
Na = 4.48 moles
Cl₂ ( is limiting reagent )
13 L / 22,4 L = 0.580 moles Cl₂
2 ( Sodium stoichiometric coefficient)* 0.580 = 1.16 mol NaCl
Molar mass NaCl = 58.44 g/mol
1.16 * 58.44 = 67.7904 g of NaCl
hope this helps!
Answer:
48 mph
Explanation:
divide time by distance - 20/25 = .8 miles per minute, multiple by 60 to get mph
Answer:
The pH can be obtained from the pOH
Explanation:
pH is a number which expresses the acidity or alkalinity of a solution on a logarithmic scale on which 7 is neutral, lower values indicate greater acidity and higher values greater alkalinity. The pH is equal to −log[H^+], where [H^+] is the hydrogen ion concentration in moles per litre.
Similarly, pOH is given by; pOH= −log[OH^-]. Hence, in a question where the concentration of hydroxide ion is given, we apply this formula to first obtain the pOH.
Also, we know that pH + pOH=14. This implies that, pH= 14 - pOH. Thus we obtain the pH of the solution from its hydroxide ion concentration by following all the steps listed above.
