Answer: The concentration of 
in the final solution is 0.006688 M and number of moles are 0.00006688
Explanation:
According to the neutralization law,
where,
= molarity of stock solution = 6.847 M
= volume of stock solution = 25.00 ml
= molarity of ist dilute solution = ?
= volume of first dilute solution = 100.0 ml
2) on second dilution;
3) on third dilution
4) on fourth dilution
5) on fifth dilution
Thus the concentration of in the final solution is 0.006688 M
moles of = 
Answer:
result in less violent eruptions than felsic to intermediate magmas.
Explanation:
Mafic magma results in less violent eruptions than felsic to intermediate magma.
They are predominantly made up of a high level of magnesium and iron in their composition.
- The have very low silica content in their composition.
- They are usually less viscous due to their low silica proportion.
- They produce less violent eruptions and allows gases to move and escape easily through them.
- Felsic magma on the other hand produce very violent eruptions.
- The have a high silica content and often traps gases within them.
Answer:
15 h
Explanation:
Okay, the first thing that we all have to know before we can answer this question is that this Topic that is, Chemistry of Radioactivity is related to kinetics in a way that Radioactive disintegration follows the first order of Reaction which is under kinetics. So, we will be using the first order kinetics rate law to answer this question. Using the equation (1) below;
k =[ 2.303/ t ]×log ([N°}/ [Nr]) --------(1).
We are given from the question that N° = initial sample = 0.8 mg and Nr= sample remaining = 0.2 and the time taken = t= 30.0 h.
k= (2.303/ 30.0 h ) × log (0.8/0.2).
k=0.076768 h^-1 × log (4).
k= 0.076768 h^-1 × 0.6021.
k= 0.0462 h^-1.
Therefore, using the formula for Calculating half life below for first order kinetics we will be able to find out answer.
k = ln 2/ t(1/2). Where t(1/2) is the half life.
t(1/2) = ln 2/ k.
t(1/2) = ln 2 / 0.0462 h^-1.
t(1/2)= 0.6931/0.0462 h^-1.
t(1/2)=15 h
342.3 g/mol
11 times 16
22 times 1
12 times 12
and then add them together
