Answer:
18.7L
Explanation:
To solve this problem, we first find the number of moles the given number of atoms of He represents.
Number of atoms of He = 5.03 x 10²³ atoms
So;
6.02 x 10²³ atoms will contain 1 mole of He
5.03 x 10²³ atoms will have = 0.84mole of He
Now, the volume at STP;
1 mole of He will occupy 22.4L at STP
0.84 mole of He will occupy 0.84 x 22.4 = 18.7L at STP
if this is is a True or False question I think it would be (False). Because the continental crust is lighter than the oceanic crust, and the continental crust cannot subduct.
If the glasses and glove were wrong then I would chose the fire extinguisher and the power source should be the correct answer.
That's just what I would do though.
First, we have to see how K2O behaves when it is dissolved in water:
K2O + H20 = 2 KOH
According to reaction K2O has base properties, so it forms a hydroxide in water.
For the reaction next relation follows:
c(KOH) : c(K2O) = 1 : 2
So,
c(KOH)= 2 x c(K2O)= 2 x 0.005 = 0.01 M = c(OH⁻)
Now we can calculate pH:
pOH= -log c(OH⁻) = -log 0.01 = 2
pH= 14-2 = 12
The oxidizing agent is the one that is reduced which is also the one who gains electron. The reducing agent is the one that is oxidized which is also the one who loses electron. Thus,
a. The substance H2S is the one oxidized.
b. The substance I2 is the one reduced.
c. The oxidizing agent is I2.
d. The reducing agent is H2S.