Answer:
5.5 grams
Explanation:
To find how much of the isotope remains, you need to use the half-life equation:
In this equation,
-----> N(t) = remaining mass (g)
-----> N₀ = initial mass (g)
-----> t = time (hrs)
-----> h = half-life (hrs)
You can find the remaining mass by plugging the given values into the equation and solving.
N(t) = ? g t = 30 hrs
N₀ = 22 g h = 15 hrs
<----- Half-life equation
<----- Insert values
<----- Simplify exponent
<----- Solve
<----- Multiply 22 and 0.25
Answer:
ionic bonding occurs between ions and covalent bonding occurs when atoms have electrons in common (they share).
Milk (lowest acidity) < Coffee < Orange juice < Soda pops < vomit < Battery acid (highest acidity)
explanation :
pH values of all :
battery acid pH = 1.0
vomit pH = 2.0
soda pop pH = 2.5
orange juice pH = 3.5
coffee pH = 5.0
milik pH = 6.5
pH value is lesser acidity is more . high pH indicate lesser acidic nature
Negative charge some extra characters
Urban areas seem to have giant increases and de creases compared to rural