0.1 M x 0.5L = 0.05 mols HCl.
Adding 25 mL 2M NaOH is
2M x 0.025 L = 0.05 mols NaOH.
What you want to do is to back off very slightly with the NaOH (you might try something like 24.95 mL which I calculate to give 0.00019 M or a pH of 3.7. Inching closer, 24.99 mL would leave H^+ of 4E-5 for pH 4.4. The problem here is two-fold.
hope it helps
1- global patterns of wind
2- warm air rises causing most warm air to go to the equator
Equilibrium concentration of SO3=1.7M
Equilibrium concentration of SO2=0.070 M
Equilibrium concentration of NO2=1.3 M
Equilibrium constant is given as=10.8
The equilibrium reaction is given as:
SO2(g)+NI2(g)⇌NO(g) +SO3(g)
Keq= ([NO][SO3])/([SO2][NO2])
To calculate concentration of NO rearranging the above equation will give:
NO=Keq*[SO2][NO2]/[SO3]
NO=(10.8*0.070*1.3)/1.7
= 0.578M
So concentration of NO will be 0.578M
Answer:
C: Ion
Explanation:
We are told that the atom has;
9 protons
10 electrons.
Now, in chemistry, when number of electrons(negative) is more than number of protons(positive), we say that the atom is negatively charged.
Now, looking at the options;
- alpha particles have 2 protons and 2 neutrons and so it is not correct
- for an atom to be neutrally charged, number of protons must be equal to number of electrons. Thus it is not correct.
- For an atom to be an ion, it means that there is an unequal amount of electrons and protons. If the atom has more electrons than protons, it is called anion(negative ion) but if it has less electrons than protons, it is called cation(positive ion).
Thus, option C is the correct answer.